/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 07:56:28,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 07:56:28,029 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 07:56:28,064 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 07:56:28,083 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 07:56:28,084 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 07:56:28,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 07:56:28,085 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 07:56:28,086 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 07:56:28,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 07:56:28,088 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 07:56:28,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 07:56:28,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 07:56:28,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 07:56:28,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 07:56:28,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 07:56:28,106 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 07:56:28,111 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 07:56:28,112 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 07:56:28,112 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 07:56:28,116 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-Separate.epf [2021-06-05 07:56:28,151 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 07:56:28,152 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 07:56:28,152 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 07:56:28,152 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 07:56:28,154 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 07:56:28,154 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 07:56:28,154 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 07:56:28,155 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 07:56:28,155 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 07:56:28,155 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 07:56:28,156 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 07:56:28,156 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 07:56:28,156 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 07:56:28,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 07:56:28,156 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 07:56:28,156 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 07:56:28,156 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 07:56:28,156 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 07:56:28,157 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 07:56:28,157 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 07:56:28,157 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 07:56:28,157 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 07:56:28,157 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 07:56:28,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 07:56:28,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 07:56:28,158 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 07:56:28,158 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 07:56:28,158 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 07:56:28,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 07:56:28,158 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 07:56:28,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 07:56:28,158 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 07:56:28,158 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 07:56:28,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 07:56:28,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 07:56:28,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 07:56:28,481 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-05 07:56:28,482 INFO L275 PluginConnector]: CDTParser initialized [2021-06-05 07:56:28,483 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2021-06-05 07:56:28,530 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bbfdf031/968df52051ea4f3db46396e5dd6d3260/FLAG488ec04c2 [2021-06-05 07:56:29,041 INFO L306 CDTParser]: Found 1 translation units. [2021-06-05 07:56:29,042 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2021-06-05 07:56:29,055 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bbfdf031/968df52051ea4f3db46396e5dd6d3260/FLAG488ec04c2 [2021-06-05 07:56:29,345 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bbfdf031/968df52051ea4f3db46396e5dd6d3260 [2021-06-05 07:56:29,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 07:56:29,348 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-05 07:56:29,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-05 07:56:29,350 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-05 07:56:29,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-05 07:56:29,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 07:56:29" (1/1) ... [2021-06-05 07:56:29,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c2acb53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:56:29, skipping insertion in model container [2021-06-05 07:56:29,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 07:56:29" (1/1) ... [2021-06-05 07:56:29,381 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-05 07:56:29,423 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-05 07:56:29,764 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] [2021-06-05 07:56:29,777 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 07:56:29,786 INFO L203 MainTranslator]: Completed pre-run [2021-06-05 07:56:29,824 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] [2021-06-05 07:56:29,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 07:56:29,879 INFO L208 MainTranslator]: Completed translation [2021-06-05 07:56:29,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:56:29 WrapperNode [2021-06-05 07:56:29,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-05 07:56:29,881 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 07:56:29,881 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 07:56:29,881 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 07:56:29,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:56:29" (1/1) ... [2021-06-05 07:56:29,911 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:56:29" (1/1) ... [2021-06-05 07:56:29,932 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 07:56:29,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 07:56:29,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 07:56:29,933 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 07:56:29,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:56:29" (1/1) ... [2021-06-05 07:56:29,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:56:29" (1/1) ... [2021-06-05 07:56:29,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:56:29" (1/1) ... [2021-06-05 07:56:29,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:56:29" (1/1) ... [2021-06-05 07:56:29,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:56:29" (1/1) ... [2021-06-05 07:56:29,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:56:29" (1/1) ... [2021-06-05 07:56:29,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:56:29" (1/1) ... [2021-06-05 07:56:29,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 07:56:29,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 07:56:29,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 07:56:29,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 07:56:29,965 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:56:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 07:56:30,042 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-05 07:56:30,043 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-05 07:56:30,043 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-05 07:56:30,043 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-05 07:56:30,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-05 07:56:30,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-05 07:56:30,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-05 07:56:30,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-05 07:56:30,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-05 07:56:30,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-05 07:56:30,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 07:56:30,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 07:56:30,048 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 07:56:30,330 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 07:56:30,331 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-05 07:56:30,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 07:56:30 BoogieIcfgContainer [2021-06-05 07:56:30,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 07:56:30,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 07:56:30,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 07:56:30,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 07:56:30,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.06 07:56:29" (1/3) ... [2021-06-05 07:56:30,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5db25926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 07:56:30, skipping insertion in model container [2021-06-05 07:56:30,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:56:29" (2/3) ... [2021-06-05 07:56:30,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5db25926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 07:56:30, skipping insertion in model container [2021-06-05 07:56:30,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 07:56:30" (3/3) ... [2021-06-05 07:56:30,339 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2021-06-05 07:56:30,344 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 07:56:30,344 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 07:56:30,344 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 07:56:30,345 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 07:56:30,366 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,367 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,367 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,367 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,367 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,367 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,367 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,368 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,368 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,368 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,368 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,368 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,369 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,369 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,369 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,369 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,369 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,369 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,370 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,370 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,370 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,370 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,370 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,370 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,371 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,371 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,371 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,371 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,371 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,372 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,372 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,372 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,372 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,372 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,372 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,372 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,373 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,373 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,373 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,373 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,373 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,373 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,374 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,374 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,374 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,374 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,374 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,374 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,375 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,375 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,375 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,375 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,375 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,375 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,376 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,376 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,377 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,378 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,378 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,378 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,378 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,378 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,382 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,383 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,383 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,383 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,383 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,383 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:56:30,385 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 07:56:30,403 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 07:56:30,420 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 07:56:30,420 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 07:56:30,420 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 07:56:30,420 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 07:56:30,420 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 07:56:30,420 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 07:56:30,421 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 07:56:30,421 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 07:56:30,429 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-06-05 07:56:30,512 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) [2021-06-05 07:56:30,518 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) [2021-06-05 07:56:30,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 07:56:30,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:30,529 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] [2021-06-05 07:56:30,529 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:30,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:30,533 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-06-05 07:56:30,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:30,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231539543] [2021-06-05 07:56:30,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:30,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:30,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:30,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231539543] [2021-06-05 07:56:30,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231539543] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:56:30,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:56:30,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 07:56:30,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064726085] [2021-06-05 07:56:30,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:56:30,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:30,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:56:30,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:56:30,873 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) [2021-06-05 07:56:31,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:31,048 INFO L93 Difference]: Finished difference Result 3467 states and 10030 transitions. [2021-06-05 07:56:31,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:56:31,050 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 [2021-06-05 07:56:31,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:31,068 INFO L225 Difference]: With dead ends: 3467 [2021-06-05 07:56:31,069 INFO L226 Difference]: Without dead ends: 1242 [2021-06-05 07:56:31,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:56:31,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-06-05 07:56:31,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 942. [2021-06-05 07:56:31,173 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) [2021-06-05 07:56:31,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 2548 transitions. [2021-06-05 07:56:31,179 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 2548 transitions. Word has length 32 [2021-06-05 07:56:31,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:31,179 INFO L482 AbstractCegarLoop]: Abstraction has 942 states and 2548 transitions. [2021-06-05 07:56:31,179 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) [2021-06-05 07:56:31,180 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 2548 transitions. [2021-06-05 07:56:31,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:56:31,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:31,184 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] [2021-06-05 07:56:31,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 07:56:31,184 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:31,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:31,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1720134605, now seen corresponding path program 1 times [2021-06-05 07:56:31,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:31,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68763307] [2021-06-05 07:56:31,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:31,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:31,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:31,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68763307] [2021-06-05 07:56:31,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68763307] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:56:31,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:56:31,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 07:56:31,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583375819] [2021-06-05 07:56:31,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:56:31,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:31,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:56:31,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:56:31,326 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) [2021-06-05 07:56:31,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:31,471 INFO L93 Difference]: Finished difference Result 1194 states and 3180 transitions. [2021-06-05 07:56:31,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 07:56:31,472 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 [2021-06-05 07:56:31,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:31,479 INFO L225 Difference]: With dead ends: 1194 [2021-06-05 07:56:31,479 INFO L226 Difference]: Without dead ends: 942 [2021-06-05 07:56:31,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:56:31,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-06-05 07:56:31,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 800. [2021-06-05 07:56:31,508 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) [2021-06-05 07:56:31,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-06-05 07:56:31,512 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 36 [2021-06-05 07:56:31,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:31,513 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-06-05 07:56:31,513 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) [2021-06-05 07:56:31,513 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-06-05 07:56:31,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:56:31,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:31,515 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] [2021-06-05 07:56:31,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 07:56:31,516 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:31,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:31,516 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-06-05 07:56:31,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:31,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332297387] [2021-06-05 07:56:31,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:31,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:31,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:31,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332297387] [2021-06-05 07:56:31,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332297387] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:56:31,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:56:31,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 07:56:31,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734084083] [2021-06-05 07:56:31,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:56:31,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:31,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:56:31,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:56:31,620 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) [2021-06-05 07:56:31,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:31,741 INFO L93 Difference]: Finished difference Result 1302 states and 3436 transitions. [2021-06-05 07:56:31,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:56:31,742 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 [2021-06-05 07:56:31,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:31,747 INFO L225 Difference]: With dead ends: 1302 [2021-06-05 07:56:31,747 INFO L226 Difference]: Without dead ends: 920 [2021-06-05 07:56:31,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:56:31,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-06-05 07:56:31,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-06-05 07:56:31,802 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) [2021-06-05 07:56:31,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-06-05 07:56:31,805 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-06-05 07:56:31,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:31,805 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-06-05 07:56:31,805 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) [2021-06-05 07:56:31,805 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-06-05 07:56:31,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 07:56:31,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:31,807 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] [2021-06-05 07:56:31,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 07:56:31,807 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:31,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:31,808 INFO L82 PathProgramCache]: Analyzing trace with hash 307394794, now seen corresponding path program 1 times [2021-06-05 07:56:31,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:31,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080066184] [2021-06-05 07:56:31,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:31,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:31,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:31,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080066184] [2021-06-05 07:56:31,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080066184] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:56:31,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:56:31,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 07:56:31,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414431983] [2021-06-05 07:56:31,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 07:56:31,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:31,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 07:56:31,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:56:31,935 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) [2021-06-05 07:56:32,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:32,020 INFO L93 Difference]: Finished difference Result 1332 states and 3512 transitions. [2021-06-05 07:56:32,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:56:32,025 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 [2021-06-05 07:56:32,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:32,029 INFO L225 Difference]: With dead ends: 1332 [2021-06-05 07:56:32,030 INFO L226 Difference]: Without dead ends: 1072 [2021-06-05 07:56:32,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:56:32,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-06-05 07:56:32,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 876. [2021-06-05 07:56:32,056 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) [2021-06-05 07:56:32,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-06-05 07:56:32,059 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-06-05 07:56:32,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:32,061 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-06-05 07:56:32,061 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) [2021-06-05 07:56:32,061 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-06-05 07:56:32,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 07:56:32,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:32,064 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] [2021-06-05 07:56:32,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 07:56:32,064 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:32,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:32,065 INFO L82 PathProgramCache]: Analyzing trace with hash -258094508, now seen corresponding path program 2 times [2021-06-05 07:56:32,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:32,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701586231] [2021-06-05 07:56:32,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:32,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:32,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:32,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701586231] [2021-06-05 07:56:32,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701586231] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:56:32,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:56:32,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 07:56:32,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200596546] [2021-06-05 07:56:32,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:56:32,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:32,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:56:32,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:56:32,183 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) [2021-06-05 07:56:32,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:32,307 INFO L93 Difference]: Finished difference Result 1772 states and 4744 transitions. [2021-06-05 07:56:32,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:56:32,308 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 [2021-06-05 07:56:32,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:32,317 INFO L225 Difference]: With dead ends: 1772 [2021-06-05 07:56:32,317 INFO L226 Difference]: Without dead ends: 1505 [2021-06-05 07:56:32,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 88.7ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:56:32,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-06-05 07:56:32,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 975. [2021-06-05 07:56:32,345 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) [2021-06-05 07:56:32,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2628 transitions. [2021-06-05 07:56:32,348 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2628 transitions. Word has length 40 [2021-06-05 07:56:32,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:32,348 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 2628 transitions. [2021-06-05 07:56:32,348 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) [2021-06-05 07:56:32,348 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2628 transitions. [2021-06-05 07:56:32,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 07:56:32,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:32,349 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] [2021-06-05 07:56:32,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 07:56:32,350 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:32,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:32,350 INFO L82 PathProgramCache]: Analyzing trace with hash 129784312, now seen corresponding path program 3 times [2021-06-05 07:56:32,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:32,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588288658] [2021-06-05 07:56:32,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:32,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:32,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:32,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588288658] [2021-06-05 07:56:32,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588288658] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:56:32,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:56:32,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 07:56:32,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844033909] [2021-06-05 07:56:32,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 07:56:32,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:32,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 07:56:32,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:56:32,450 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) [2021-06-05 07:56:32,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:32,552 INFO L93 Difference]: Finished difference Result 2211 states and 5878 transitions. [2021-06-05 07:56:32,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:56:32,552 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 [2021-06-05 07:56:32,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:32,561 INFO L225 Difference]: With dead ends: 2211 [2021-06-05 07:56:32,561 INFO L226 Difference]: Without dead ends: 1944 [2021-06-05 07:56:32,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:56:32,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-06-05 07:56:32,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1127. [2021-06-05 07:56:32,595 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) [2021-06-05 07:56:32,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3119 transitions. [2021-06-05 07:56:32,600 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3119 transitions. Word has length 40 [2021-06-05 07:56:32,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:32,600 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 3119 transitions. [2021-06-05 07:56:32,600 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) [2021-06-05 07:56:32,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3119 transitions. [2021-06-05 07:56:32,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 07:56:32,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:32,602 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] [2021-06-05 07:56:32,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 07:56:32,602 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:32,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:32,602 INFO L82 PathProgramCache]: Analyzing trace with hash 152127562, now seen corresponding path program 4 times [2021-06-05 07:56:32,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:32,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148112165] [2021-06-05 07:56:32,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:32,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:32,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148112165] [2021-06-05 07:56:32,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148112165] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:56:32,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:56:32,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 07:56:32,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246484000] [2021-06-05 07:56:32,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 07:56:32,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:32,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 07:56:32,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:56:32,661 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) [2021-06-05 07:56:32,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:32,780 INFO L93 Difference]: Finished difference Result 1519 states and 4031 transitions. [2021-06-05 07:56:32,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:56:32,781 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 [2021-06-05 07:56:32,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:32,786 INFO L225 Difference]: With dead ends: 1519 [2021-06-05 07:56:32,786 INFO L226 Difference]: Without dead ends: 1138 [2021-06-05 07:56:32,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:56:32,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-06-05 07:56:32,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1033. [2021-06-05 07:56:32,829 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) [2021-06-05 07:56:32,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2823 transitions. [2021-06-05 07:56:32,833 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2823 transitions. Word has length 40 [2021-06-05 07:56:32,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:32,833 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 2823 transitions. [2021-06-05 07:56:32,833 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) [2021-06-05 07:56:32,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2823 transitions. [2021-06-05 07:56:32,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 07:56:32,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:32,836 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] [2021-06-05 07:56:32,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 07:56:32,836 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:32,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:32,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1301576209, now seen corresponding path program 1 times [2021-06-05 07:56:32,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:32,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753152718] [2021-06-05 07:56:32,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:32,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:32,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:32,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753152718] [2021-06-05 07:56:32,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753152718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:32,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153385997] [2021-06-05 07:56:32,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:33,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:33,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:56:33,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:33,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:33,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153385997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:33,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:33,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 07:56:33,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165414841] [2021-06-05 07:56:33,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:56:33,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:33,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:56:33,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:56:33,303 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) [2021-06-05 07:56:33,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:33,461 INFO L93 Difference]: Finished difference Result 1451 states and 3787 transitions. [2021-06-05 07:56:33,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 07:56:33,461 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 [2021-06-05 07:56:33,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:33,467 INFO L225 Difference]: With dead ends: 1451 [2021-06-05 07:56:33,467 INFO L226 Difference]: Without dead ends: 1181 [2021-06-05 07:56:33,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 139.5ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:56:33,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-06-05 07:56:33,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1083. [2021-06-05 07:56:33,498 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) [2021-06-05 07:56:33,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 2928 transitions. [2021-06-05 07:56:33,502 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 2928 transitions. Word has length 45 [2021-06-05 07:56:33,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:33,502 INFO L482 AbstractCegarLoop]: Abstraction has 1083 states and 2928 transitions. [2021-06-05 07:56:33,503 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) [2021-06-05 07:56:33,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 2928 transitions. [2021-06-05 07:56:33,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 07:56:33,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:33,505 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] [2021-06-05 07:56:33,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-06-05 07:56:33,721 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:33,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:33,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1689455029, now seen corresponding path program 2 times [2021-06-05 07:56:33,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:33,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440053724] [2021-06-05 07:56:33,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:33,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:33,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440053724] [2021-06-05 07:56:33,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440053724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:33,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272061061] [2021-06-05 07:56:33,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:33,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:56:33,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:33,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:56:33,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:33,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272061061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:33,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:33,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 07:56:33,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569542725] [2021-06-05 07:56:33,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:56:33,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:33,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:56:33,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:56:33,998 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) [2021-06-05 07:56:34,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:34,145 INFO L93 Difference]: Finished difference Result 2333 states and 6191 transitions. [2021-06-05 07:56:34,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:56:34,146 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 [2021-06-05 07:56:34,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:34,154 INFO L225 Difference]: With dead ends: 2333 [2021-06-05 07:56:34,154 INFO L226 Difference]: Without dead ends: 2063 [2021-06-05 07:56:34,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:56:34,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-06-05 07:56:34,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1218. [2021-06-05 07:56:34,189 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) [2021-06-05 07:56:34,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 3367 transitions. [2021-06-05 07:56:34,193 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 3367 transitions. Word has length 45 [2021-06-05 07:56:34,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:34,193 INFO L482 AbstractCegarLoop]: Abstraction has 1218 states and 3367 transitions. [2021-06-05 07:56:34,193 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) [2021-06-05 07:56:34,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 3367 transitions. [2021-06-05 07:56:34,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 07:56:34,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:34,195 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] [2021-06-05 07:56:34,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:34,419 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:34,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:34,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1711798279, now seen corresponding path program 3 times [2021-06-05 07:56:34,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:34,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835259883] [2021-06-05 07:56:34,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:34,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:34,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:34,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835259883] [2021-06-05 07:56:34,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835259883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:34,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768047177] [2021-06-05 07:56:34,504 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 [2021-06-05 07:56:34,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:56:34,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:34,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:56:34,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:34,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:34,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768047177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:34,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:34,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 07:56:34,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693775726] [2021-06-05 07:56:34,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:56:34,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:34,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:56:34,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:56:34,709 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) [2021-06-05 07:56:34,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:34,975 INFO L93 Difference]: Finished difference Result 2121 states and 5621 transitions. [2021-06-05 07:56:34,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:56:34,975 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 [2021-06-05 07:56:34,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:34,982 INFO L225 Difference]: With dead ends: 2121 [2021-06-05 07:56:34,982 INFO L226 Difference]: Without dead ends: 1546 [2021-06-05 07:56:34,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 216.3ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:56:34,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2021-06-05 07:56:35,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1253. [2021-06-05 07:56:35,011 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) [2021-06-05 07:56:35,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 3458 transitions. [2021-06-05 07:56:35,014 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 3458 transitions. Word has length 45 [2021-06-05 07:56:35,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:35,015 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 3458 transitions. [2021-06-05 07:56:35,015 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) [2021-06-05 07:56:35,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 3458 transitions. [2021-06-05 07:56:35,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 07:56:35,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:35,017 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] [2021-06-05 07:56:35,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 07:56:35,230 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:35,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:35,230 INFO L82 PathProgramCache]: Analyzing trace with hash 315802636, now seen corresponding path program 1 times [2021-06-05 07:56:35,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:35,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842334058] [2021-06-05 07:56:35,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:35,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:35,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:35,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:35,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842334058] [2021-06-05 07:56:35,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842334058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:35,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612433654] [2021-06-05 07:56:35,289 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 [2021-06-05 07:56:35,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:35,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:56:35,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:35,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:35,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612433654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:35,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:35,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 07:56:35,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610364044] [2021-06-05 07:56:35,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:56:35,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:35,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:56:35,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:56:35,481 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) [2021-06-05 07:56:35,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:35,646 INFO L93 Difference]: Finished difference Result 2398 states and 6444 transitions. [2021-06-05 07:56:35,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:56:35,646 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 [2021-06-05 07:56:35,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:35,654 INFO L225 Difference]: With dead ends: 2398 [2021-06-05 07:56:35,655 INFO L226 Difference]: Without dead ends: 1926 [2021-06-05 07:56:35,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 130.2ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:56:35,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-06-05 07:56:35,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1456. [2021-06-05 07:56:35,687 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) [2021-06-05 07:56:35,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 3969 transitions. [2021-06-05 07:56:35,691 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 3969 transitions. Word has length 45 [2021-06-05 07:56:35,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:35,692 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 3969 transitions. [2021-06-05 07:56:35,692 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) [2021-06-05 07:56:35,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 3969 transitions. [2021-06-05 07:56:35,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 07:56:35,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:35,694 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] [2021-06-05 07:56:35,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:35,919 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:35,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:35,919 INFO L82 PathProgramCache]: Analyzing trace with hash 456189922, now seen corresponding path program 1 times [2021-06-05 07:56:35,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:35,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619495102] [2021-06-05 07:56:35,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:36,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:36,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:36,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619495102] [2021-06-05 07:56:36,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619495102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:36,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179322569] [2021-06-05 07:56:36,016 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 [2021-06-05 07:56:36,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:36,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:56:36,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:36,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179322569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:36,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:36,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 07:56:36,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298588288] [2021-06-05 07:56:36,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:56:36,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:36,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:56:36,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:56:36,265 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) [2021-06-05 07:56:36,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:36,443 INFO L93 Difference]: Finished difference Result 1866 states and 4917 transitions. [2021-06-05 07:56:36,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:56:36,444 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 [2021-06-05 07:56:36,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:36,450 INFO L225 Difference]: With dead ends: 1866 [2021-06-05 07:56:36,451 INFO L226 Difference]: Without dead ends: 1596 [2021-06-05 07:56:36,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 170.6ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:56:36,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-06-05 07:56:36,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1531. [2021-06-05 07:56:36,479 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) [2021-06-05 07:56:36,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4119 transitions. [2021-06-05 07:56:36,483 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4119 transitions. Word has length 55 [2021-06-05 07:56:36,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:36,483 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4119 transitions. [2021-06-05 07:56:36,484 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) [2021-06-05 07:56:36,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4119 transitions. [2021-06-05 07:56:36,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 07:56:36,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:36,487 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] [2021-06-05 07:56:36,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 07:56:36,711 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:36,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:36,711 INFO L82 PathProgramCache]: Analyzing trace with hash 117785766, now seen corresponding path program 2 times [2021-06-05 07:56:36,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:36,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45824792] [2021-06-05 07:56:36,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:36,790 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:36,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:36,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45824792] [2021-06-05 07:56:36,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45824792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:36,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572933468] [2021-06-05 07:56:36,790 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 [2021-06-05 07:56:36,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:56:36,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:36,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:56:36,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:37,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572933468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:37,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:37,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 07:56:37,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373235037] [2021-06-05 07:56:37,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:56:37,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:37,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:56:37,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:56:37,002 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) [2021-06-05 07:56:37,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:37,184 INFO L93 Difference]: Finished difference Result 1981 states and 5147 transitions. [2021-06-05 07:56:37,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:56:37,185 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 [2021-06-05 07:56:37,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:37,202 INFO L225 Difference]: With dead ends: 1981 [2021-06-05 07:56:37,202 INFO L226 Difference]: Without dead ends: 1711 [2021-06-05 07:56:37,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 150.3ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:56:37,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2021-06-05 07:56:37,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1531. [2021-06-05 07:56:37,236 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) [2021-06-05 07:56:37,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4119 transitions. [2021-06-05 07:56:37,241 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4119 transitions. Word has length 55 [2021-06-05 07:56:37,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:37,241 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4119 transitions. [2021-06-05 07:56:37,242 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) [2021-06-05 07:56:37,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4119 transitions. [2021-06-05 07:56:37,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 07:56:37,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:37,245 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] [2021-06-05 07:56:37,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:37,469 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:37,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:37,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1597456522, now seen corresponding path program 3 times [2021-06-05 07:56:37,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:37,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624976142] [2021-06-05 07:56:37,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:37,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:37,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:37,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624976142] [2021-06-05 07:56:37,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624976142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:37,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309606929] [2021-06-05 07:56:37,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:37,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:56:37,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:37,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:56:37,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:37,733 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:37,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309606929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:37,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:37,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 07:56:37,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102606677] [2021-06-05 07:56:37,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:56:37,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:37,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:56:37,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:56:37,735 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) [2021-06-05 07:56:38,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:38,020 INFO L93 Difference]: Finished difference Result 2669 states and 6993 transitions. [2021-06-05 07:56:38,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:56:38,021 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 [2021-06-05 07:56:38,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:38,026 INFO L225 Difference]: With dead ends: 2669 [2021-06-05 07:56:38,026 INFO L226 Difference]: Without dead ends: 2046 [2021-06-05 07:56:38,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 224.3ms TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:56:38,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-06-05 07:56:38,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1561. [2021-06-05 07:56:38,056 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) [2021-06-05 07:56:38,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 4244 transitions. [2021-06-05 07:56:38,060 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 4244 transitions. Word has length 55 [2021-06-05 07:56:38,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:38,060 INFO L482 AbstractCegarLoop]: Abstraction has 1561 states and 4244 transitions. [2021-06-05 07:56:38,060 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) [2021-06-05 07:56:38,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 4244 transitions. [2021-06-05 07:56:38,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 07:56:38,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:38,062 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] [2021-06-05 07:56:38,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 07:56:38,286 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:38,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:38,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1664863172, now seen corresponding path program 4 times [2021-06-05 07:56:38,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:38,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153368451] [2021-06-05 07:56:38,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:38,377 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:38,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:38,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153368451] [2021-06-05 07:56:38,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153368451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:38,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348141832] [2021-06-05 07:56:38,378 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:38,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:56:38,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:38,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:56:38,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:38,554 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:38,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348141832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:38,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:38,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 07:56:38,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472080172] [2021-06-05 07:56:38,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:56:38,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:38,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:56:38,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:56:38,556 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) [2021-06-05 07:56:38,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:38,786 INFO L93 Difference]: Finished difference Result 2878 states and 7671 transitions. [2021-06-05 07:56:38,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:56:38,786 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 [2021-06-05 07:56:38,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:38,792 INFO L225 Difference]: With dead ends: 2878 [2021-06-05 07:56:38,792 INFO L226 Difference]: Without dead ends: 2608 [2021-06-05 07:56:38,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:56:38,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-06-05 07:56:38,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 1741. [2021-06-05 07:56:38,827 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) [2021-06-05 07:56:38,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 4803 transitions. [2021-06-05 07:56:38,832 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 4803 transitions. Word has length 55 [2021-06-05 07:56:38,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:38,832 INFO L482 AbstractCegarLoop]: Abstraction has 1741 states and 4803 transitions. [2021-06-05 07:56:38,832 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) [2021-06-05 07:56:38,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 4803 transitions. [2021-06-05 07:56:38,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 07:56:38,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:38,835 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] [2021-06-05 07:56:39,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 07:56:39,059 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:39,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:39,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1687206422, now seen corresponding path program 5 times [2021-06-05 07:56:39,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:39,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997796671] [2021-06-05 07:56:39,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:39,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:39,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:39,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:39,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997796671] [2021-06-05 07:56:39,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997796671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:39,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313230157] [2021-06-05 07:56:39,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:39,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:56:39,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:39,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:56:39,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:39,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313230157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:39,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:39,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 07:56:39,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297200395] [2021-06-05 07:56:39,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:56:39,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:39,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:56:39,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:56:39,310 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) [2021-06-05 07:56:39,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:39,680 INFO L93 Difference]: Finished difference Result 2821 states and 7531 transitions. [2021-06-05 07:56:39,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:56:39,680 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 [2021-06-05 07:56:39,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:39,685 INFO L225 Difference]: With dead ends: 2821 [2021-06-05 07:56:39,685 INFO L226 Difference]: Without dead ends: 2246 [2021-06-05 07:56:39,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 309.9ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:56:39,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-06-05 07:56:39,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 1656. [2021-06-05 07:56:39,720 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) [2021-06-05 07:56:39,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 4519 transitions. [2021-06-05 07:56:39,725 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 4519 transitions. Word has length 55 [2021-06-05 07:56:39,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:39,725 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 4519 transitions. [2021-06-05 07:56:39,725 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) [2021-06-05 07:56:39,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 4519 transitions. [2021-06-05 07:56:39,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 07:56:39,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:39,728 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] [2021-06-05 07:56:39,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 07:56:39,941 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:39,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:39,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1535924432, now seen corresponding path program 6 times [2021-06-05 07:56:39,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:39,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059118873] [2021-06-05 07:56:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:40,032 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:56:40,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:40,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059118873] [2021-06-05 07:56:40,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059118873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:40,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439175666] [2021-06-05 07:56:40,033 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 [2021-06-05 07:56:40,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 07:56:40,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:40,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:56:40,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:56:40,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439175666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:40,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:40,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 07:56:40,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949244872] [2021-06-05 07:56:40,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:56:40,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:40,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:56:40,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:56:40,261 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) [2021-06-05 07:56:40,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:40,425 INFO L93 Difference]: Finished difference Result 2561 states and 6649 transitions. [2021-06-05 07:56:40,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:56:40,425 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 [2021-06-05 07:56:40,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:40,429 INFO L225 Difference]: With dead ends: 2561 [2021-06-05 07:56:40,429 INFO L226 Difference]: Without dead ends: 2212 [2021-06-05 07:56:40,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 164.1ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:56:40,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-06-05 07:56:40,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1658. [2021-06-05 07:56:40,459 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) [2021-06-05 07:56:40,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 4523 transitions. [2021-06-05 07:56:40,463 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 4523 transitions. Word has length 55 [2021-06-05 07:56:40,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:40,463 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 4523 transitions. [2021-06-05 07:56:40,464 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) [2021-06-05 07:56:40,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 4523 transitions. [2021-06-05 07:56:40,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 07:56:40,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:40,466 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] [2021-06-05 07:56:40,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 07:56:40,693 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:40,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:40,693 INFO L82 PathProgramCache]: Analyzing trace with hash 8869516, now seen corresponding path program 7 times [2021-06-05 07:56:40,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:40,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131713860] [2021-06-05 07:56:40,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:40,768 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:56:40,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:40,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131713860] [2021-06-05 07:56:40,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131713860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:40,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099112987] [2021-06-05 07:56:40,769 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 [2021-06-05 07:56:40,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:40,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:56:40,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:56:40,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099112987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:40,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:40,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 07:56:40,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015214637] [2021-06-05 07:56:40,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:56:40,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:40,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:56:40,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:56:40,928 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) [2021-06-05 07:56:41,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:41,041 INFO L93 Difference]: Finished difference Result 2311 states and 5957 transitions. [2021-06-05 07:56:41,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 07:56:41,042 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 [2021-06-05 07:56:41,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:41,045 INFO L225 Difference]: With dead ends: 2311 [2021-06-05 07:56:41,046 INFO L226 Difference]: Without dead ends: 2026 [2021-06-05 07:56:41,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:56:41,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2021-06-05 07:56:41,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1638. [2021-06-05 07:56:41,071 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) [2021-06-05 07:56:41,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 4483 transitions. [2021-06-05 07:56:41,074 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 4483 transitions. Word has length 55 [2021-06-05 07:56:41,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:41,075 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 4483 transitions. [2021-06-05 07:56:41,075 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) [2021-06-05 07:56:41,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 4483 transitions. [2021-06-05 07:56:41,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 07:56:41,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:41,077 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] [2021-06-05 07:56:41,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:41,293 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:41,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:41,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1697636932, now seen corresponding path program 8 times [2021-06-05 07:56:41,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:41,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856043395] [2021-06-05 07:56:41,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:41,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:41,392 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:56:41,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:41,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856043395] [2021-06-05 07:56:41,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856043395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:41,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292311082] [2021-06-05 07:56:41,393 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 [2021-06-05 07:56:41,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:56:41,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:41,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:56:41,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:56:41,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292311082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:41,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:41,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 07:56:41,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804279909] [2021-06-05 07:56:41,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:56:41,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:41,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:56:41,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:56:41,573 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) [2021-06-05 07:56:41,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:41,746 INFO L93 Difference]: Finished difference Result 2246 states and 5827 transitions. [2021-06-05 07:56:41,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:56:41,747 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 [2021-06-05 07:56:41,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:41,750 INFO L225 Difference]: With dead ends: 2246 [2021-06-05 07:56:41,751 INFO L226 Difference]: Without dead ends: 1961 [2021-06-05 07:56:41,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 179.9ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:56:41,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-06-05 07:56:41,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1613. [2021-06-05 07:56:41,775 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) [2021-06-05 07:56:41,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 4433 transitions. [2021-06-05 07:56:41,779 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 4433 transitions. Word has length 55 [2021-06-05 07:56:41,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:41,779 INFO L482 AbstractCegarLoop]: Abstraction has 1613 states and 4433 transitions. [2021-06-05 07:56:41,779 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) [2021-06-05 07:56:41,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 4433 transitions. [2021-06-05 07:56:41,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 07:56:41,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:41,781 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] [2021-06-05 07:56:42,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:42,005 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:42,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:42,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1496820963, now seen corresponding path program 9 times [2021-06-05 07:56:42,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:42,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127032426] [2021-06-05 07:56:42,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:42,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:42,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:42,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127032426] [2021-06-05 07:56:42,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127032426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:42,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82129055] [2021-06-05 07:56:42,072 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 [2021-06-05 07:56:42,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:56:42,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:42,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:56:42,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:42,232 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:42,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82129055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:42,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:42,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 07:56:42,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989596379] [2021-06-05 07:56:42,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:56:42,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:42,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:56:42,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:56:42,233 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) [2021-06-05 07:56:42,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:42,488 INFO L93 Difference]: Finished difference Result 3288 states and 8870 transitions. [2021-06-05 07:56:42,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:56:42,489 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 [2021-06-05 07:56:42,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:42,493 INFO L225 Difference]: With dead ends: 3288 [2021-06-05 07:56:42,493 INFO L226 Difference]: Without dead ends: 2476 [2021-06-05 07:56:42,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 209.5ms TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:56:42,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2021-06-05 07:56:42,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 1856. [2021-06-05 07:56:42,522 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) [2021-06-05 07:56:42,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 5069 transitions. [2021-06-05 07:56:42,526 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 5069 transitions. Word has length 55 [2021-06-05 07:56:42,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:42,527 INFO L482 AbstractCegarLoop]: Abstraction has 1856 states and 5069 transitions. [2021-06-05 07:56:42,527 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) [2021-06-05 07:56:42,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 5069 transitions. [2021-06-05 07:56:42,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:56:42,530 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:42,530 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] [2021-06-05 07:56:42,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 07:56:42,753 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:42,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:42,754 INFO L82 PathProgramCache]: Analyzing trace with hash -2069953421, now seen corresponding path program 10 times [2021-06-05 07:56:42,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:42,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12527266] [2021-06-05 07:56:42,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:42,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:42,866 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:42,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:42,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12527266] [2021-06-05 07:56:42,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12527266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:42,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593975179] [2021-06-05 07:56:42,867 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 [2021-06-05 07:56:42,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:56:42,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:42,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:56:42,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:43,101 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:43,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593975179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:43,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:43,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 07:56:43,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20456961] [2021-06-05 07:56:43,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:56:43,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:43,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:56:43,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:56:43,103 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) [2021-06-05 07:56:43,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:43,331 INFO L93 Difference]: Finished difference Result 2316 states and 6117 transitions. [2021-06-05 07:56:43,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 07:56:43,331 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 [2021-06-05 07:56:43,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:43,335 INFO L225 Difference]: With dead ends: 2316 [2021-06-05 07:56:43,335 INFO L226 Difference]: Without dead ends: 2046 [2021-06-05 07:56:43,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 248.2ms TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:56:43,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-06-05 07:56:43,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1931. [2021-06-05 07:56:43,362 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) [2021-06-05 07:56:43,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-06-05 07:56:43,367 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-06-05 07:56:43,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:43,367 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-06-05 07:56:43,367 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) [2021-06-05 07:56:43,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-06-05 07:56:43,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:56:43,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:43,371 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] [2021-06-05 07:56:43,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:43,592 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:43,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:43,592 INFO L82 PathProgramCache]: Analyzing trace with hash -423019465, now seen corresponding path program 11 times [2021-06-05 07:56:43,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:43,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973631518] [2021-06-05 07:56:43,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:43,705 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:43,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:43,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973631518] [2021-06-05 07:56:43,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973631518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:43,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877009822] [2021-06-05 07:56:43,706 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 [2021-06-05 07:56:43,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:56:43,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:43,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:56:43,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:43,893 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:43,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877009822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:43,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:43,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 07:56:43,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417519269] [2021-06-05 07:56:43,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:56:43,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:43,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:56:43,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:56:43,895 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) [2021-06-05 07:56:44,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:44,085 INFO L93 Difference]: Finished difference Result 2481 states and 6447 transitions. [2021-06-05 07:56:44,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:56:44,086 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 [2021-06-05 07:56:44,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:44,091 INFO L225 Difference]: With dead ends: 2481 [2021-06-05 07:56:44,091 INFO L226 Difference]: Without dead ends: 2211 [2021-06-05 07:56:44,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 186.8ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:56:44,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-06-05 07:56:44,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 1931. [2021-06-05 07:56:44,119 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) [2021-06-05 07:56:44,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-06-05 07:56:44,123 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-06-05 07:56:44,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:44,123 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-06-05 07:56:44,123 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) [2021-06-05 07:56:44,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-06-05 07:56:44,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:56:44,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:44,126 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] [2021-06-05 07:56:44,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 07:56:44,341 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:44,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:44,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1607299847, now seen corresponding path program 12 times [2021-06-05 07:56:44,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:44,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68616683] [2021-06-05 07:56:44,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:44,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:44,448 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:44,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:44,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68616683] [2021-06-05 07:56:44,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68616683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:44,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728878173] [2021-06-05 07:56:44,449 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 [2021-06-05 07:56:44,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:56:44,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:44,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:56:44,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:44,663 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:44,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728878173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:44,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:44,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 07:56:44,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14979548] [2021-06-05 07:56:44,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:56:44,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:44,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:56:44,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:56:44,664 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) [2021-06-05 07:56:44,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:44,969 INFO L93 Difference]: Finished difference Result 2566 states and 6617 transitions. [2021-06-05 07:56:44,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:56:44,970 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 [2021-06-05 07:56:44,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:44,974 INFO L225 Difference]: With dead ends: 2566 [2021-06-05 07:56:44,974 INFO L226 Difference]: Without dead ends: 2296 [2021-06-05 07:56:44,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 271.1ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:56:44,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-06-05 07:56:44,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1931. [2021-06-05 07:56:45,002 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) [2021-06-05 07:56:45,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-06-05 07:56:45,007 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-06-05 07:56:45,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:45,007 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-06-05 07:56:45,007 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) [2021-06-05 07:56:45,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-06-05 07:56:45,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:56:45,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:45,010 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] [2021-06-05 07:56:45,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:45,225 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:45,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:45,225 INFO L82 PathProgramCache]: Analyzing trace with hash -2073427979, now seen corresponding path program 13 times [2021-06-05 07:56:45,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:45,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758768403] [2021-06-05 07:56:45,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:45,309 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:45,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:45,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758768403] [2021-06-05 07:56:45,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758768403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:45,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957443226] [2021-06-05 07:56:45,309 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 [2021-06-05 07:56:45,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:45,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:56:45,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:45,486 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:45,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957443226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:45,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:45,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 07:56:45,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473840789] [2021-06-05 07:56:45,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:56:45,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:45,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:56:45,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:56:45,487 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) [2021-06-05 07:56:45,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:45,734 INFO L93 Difference]: Finished difference Result 2496 states and 6477 transitions. [2021-06-05 07:56:45,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:56:45,735 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 [2021-06-05 07:56:45,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:45,742 INFO L225 Difference]: With dead ends: 2496 [2021-06-05 07:56:45,742 INFO L226 Difference]: Without dead ends: 2226 [2021-06-05 07:56:45,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 216.1ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:56:45,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-06-05 07:56:45,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1931. [2021-06-05 07:56:45,772 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) [2021-06-05 07:56:45,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-06-05 07:56:45,776 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-06-05 07:56:45,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:45,776 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-06-05 07:56:45,776 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) [2021-06-05 07:56:45,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-06-05 07:56:45,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:56:45,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:45,780 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] [2021-06-05 07:56:45,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 07:56:45,997 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:45,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:45,997 INFO L82 PathProgramCache]: Analyzing trace with hash 506297029, now seen corresponding path program 14 times [2021-06-05 07:56:45,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:45,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032113419] [2021-06-05 07:56:45,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:46,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:46,110 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:46,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:46,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032113419] [2021-06-05 07:56:46,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032113419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:46,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905194936] [2021-06-05 07:56:46,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:46,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:56:46,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:46,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:56:46,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:46,299 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:46,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905194936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:46,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:46,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 07:56:46,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195156601] [2021-06-05 07:56:46,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:56:46,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:46,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:56:46,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:56:46,303 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) [2021-06-05 07:56:46,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:46,651 INFO L93 Difference]: Finished difference Result 3074 states and 8103 transitions. [2021-06-05 07:56:46,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:56:46,652 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 [2021-06-05 07:56:46,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:46,655 INFO L225 Difference]: With dead ends: 3074 [2021-06-05 07:56:46,655 INFO L226 Difference]: Without dead ends: 2451 [2021-06-05 07:56:46,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 311.9ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:56:46,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-06-05 07:56:46,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1961. [2021-06-05 07:56:46,687 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) [2021-06-05 07:56:46,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 5344 transitions. [2021-06-05 07:56:46,692 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 5344 transitions. Word has length 65 [2021-06-05 07:56:46,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:46,693 INFO L482 AbstractCegarLoop]: Abstraction has 1961 states and 5344 transitions. [2021-06-05 07:56:46,693 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) [2021-06-05 07:56:46,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 5344 transitions. [2021-06-05 07:56:46,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:56:46,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:46,696 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] [2021-06-05 07:56:46,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 07:56:46,919 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:46,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:46,919 INFO L82 PathProgramCache]: Analyzing trace with hash -526350573, now seen corresponding path program 15 times [2021-06-05 07:56:46,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:46,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355121763] [2021-06-05 07:56:46,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:47,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:47,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355121763] [2021-06-05 07:56:47,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355121763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:47,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699828418] [2021-06-05 07:56:47,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:47,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:56:47,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:47,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:56:47,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:47,243 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:47,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699828418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:47,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:47,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 07:56:47,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389922409] [2021-06-05 07:56:47,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:56:47,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:47,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:56:47,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:56:47,244 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) [2021-06-05 07:56:47,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:47,512 INFO L93 Difference]: Finished difference Result 3278 states and 8771 transitions. [2021-06-05 07:56:47,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:56:47,512 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 [2021-06-05 07:56:47,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:47,515 INFO L225 Difference]: With dead ends: 3278 [2021-06-05 07:56:47,515 INFO L226 Difference]: Without dead ends: 3008 [2021-06-05 07:56:47,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 232.9ms TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2021-06-05 07:56:47,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-06-05 07:56:47,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 2141. [2021-06-05 07:56:47,545 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) [2021-06-05 07:56:47,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 5903 transitions. [2021-06-05 07:56:47,549 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 5903 transitions. Word has length 65 [2021-06-05 07:56:47,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:47,549 INFO L482 AbstractCegarLoop]: Abstraction has 2141 states and 5903 transitions. [2021-06-05 07:56:47,549 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) [2021-06-05 07:56:47,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 5903 transitions. [2021-06-05 07:56:47,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:56:47,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:47,552 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] [2021-06-05 07:56:47,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 07:56:47,775 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:47,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:47,775 INFO L82 PathProgramCache]: Analyzing trace with hash -504007323, now seen corresponding path program 16 times [2021-06-05 07:56:47,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:47,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356597666] [2021-06-05 07:56:47,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:47,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:47,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:47,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356597666] [2021-06-05 07:56:47,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356597666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:47,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537251236] [2021-06-05 07:56:47,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:47,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:56:47,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:47,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:56:47,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:48,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537251236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:48,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:48,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 07:56:48,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017340651] [2021-06-05 07:56:48,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:56:48,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:48,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:56:48,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:56:48,083 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) [2021-06-05 07:56:48,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:48,471 INFO L93 Difference]: Finished difference Result 3221 states and 8631 transitions. [2021-06-05 07:56:48,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:56:48,472 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 [2021-06-05 07:56:48,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:48,474 INFO L225 Difference]: With dead ends: 3221 [2021-06-05 07:56:48,474 INFO L226 Difference]: Without dead ends: 2646 [2021-06-05 07:56:48,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 349.1ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:56:48,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-06-05 07:56:48,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2056. [2021-06-05 07:56:48,502 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) [2021-06-05 07:56:48,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 5619 transitions. [2021-06-05 07:56:48,531 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 5619 transitions. Word has length 65 [2021-06-05 07:56:48,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:48,532 INFO L482 AbstractCegarLoop]: Abstraction has 2056 states and 5619 transitions. [2021-06-05 07:56:48,532 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) [2021-06-05 07:56:48,532 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 5619 transitions. [2021-06-05 07:56:48,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:56:48,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:48,534 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] [2021-06-05 07:56:48,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 07:56:48,745 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:48,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:48,745 INFO L82 PathProgramCache]: Analyzing trace with hash 211164831, now seen corresponding path program 17 times [2021-06-05 07:56:48,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:48,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299077743] [2021-06-05 07:56:48,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:56:48,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:48,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299077743] [2021-06-05 07:56:48,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299077743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:48,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78233798] [2021-06-05 07:56:48,861 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:48,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:56:48,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:48,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:56:48,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:56:49,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78233798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:49,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:49,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 07:56:49,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773857197] [2021-06-05 07:56:49,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:56:49,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:49,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:56:49,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:56:49,087 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) [2021-06-05 07:56:49,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:49,264 INFO L93 Difference]: Finished difference Result 3061 states and 7949 transitions. [2021-06-05 07:56:49,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:56:49,264 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 [2021-06-05 07:56:49,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:49,267 INFO L225 Difference]: With dead ends: 3061 [2021-06-05 07:56:49,268 INFO L226 Difference]: Without dead ends: 2712 [2021-06-05 07:56:49,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 192.9ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:56:49,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-06-05 07:56:49,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2058. [2021-06-05 07:56:49,296 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) [2021-06-05 07:56:49,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 5623 transitions. [2021-06-05 07:56:49,300 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 5623 transitions. Word has length 65 [2021-06-05 07:56:49,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:49,301 INFO L482 AbstractCegarLoop]: Abstraction has 2058 states and 5623 transitions. [2021-06-05 07:56:49,301 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) [2021-06-05 07:56:49,301 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 5623 transitions. [2021-06-05 07:56:49,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:56:49,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:49,304 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] [2021-06-05 07:56:49,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:49,517 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:49,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:49,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1649663653, now seen corresponding path program 18 times [2021-06-05 07:56:49,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:49,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336820080] [2021-06-05 07:56:49,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:49,602 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:56:49,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:49,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336820080] [2021-06-05 07:56:49,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336820080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:49,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678178616] [2021-06-05 07:56:49,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:49,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:56:49,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:49,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:56:49,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:49,785 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:56:49,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678178616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:49,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:49,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 07:56:49,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30626909] [2021-06-05 07:56:49,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:56:49,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:49,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:56:49,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:56:49,787 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) [2021-06-05 07:56:49,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:49,937 INFO L93 Difference]: Finished difference Result 2861 states and 7357 transitions. [2021-06-05 07:56:49,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:56:49,937 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 [2021-06-05 07:56:49,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:49,941 INFO L225 Difference]: With dead ends: 2861 [2021-06-05 07:56:49,941 INFO L226 Difference]: Without dead ends: 2576 [2021-06-05 07:56:49,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 140.7ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:56:49,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-06-05 07:56:49,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 2038. [2021-06-05 07:56:49,968 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) [2021-06-05 07:56:49,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2038 states to 2038 states and 5583 transitions. [2021-06-05 07:56:49,971 INFO L78 Accepts]: Start accepts. Automaton has 2038 states and 5583 transitions. Word has length 65 [2021-06-05 07:56:49,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:49,972 INFO L482 AbstractCegarLoop]: Abstraction has 2038 states and 5583 transitions. [2021-06-05 07:56:49,972 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) [2021-06-05 07:56:49,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states and 5583 transitions. [2021-06-05 07:56:49,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:56:49,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:49,974 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] [2021-06-05 07:56:50,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:50,189 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:50,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:50,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1345737589, now seen corresponding path program 19 times [2021-06-05 07:56:50,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:50,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821532246] [2021-06-05 07:56:50,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:50,284 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:56:50,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:50,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821532246] [2021-06-05 07:56:50,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821532246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:50,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747586310] [2021-06-05 07:56:50,284 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 [2021-06-05 07:56:50,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:50,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:56:50,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:56:50,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747586310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:50,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:50,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 07:56:50,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137778422] [2021-06-05 07:56:50,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:56:50,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:50,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:56:50,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:56:50,473 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) [2021-06-05 07:56:50,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:50,697 INFO L93 Difference]: Finished difference Result 2796 states and 7227 transitions. [2021-06-05 07:56:50,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:56:50,697 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 [2021-06-05 07:56:50,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:50,700 INFO L225 Difference]: With dead ends: 2796 [2021-06-05 07:56:50,700 INFO L226 Difference]: Without dead ends: 2511 [2021-06-05 07:56:50,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 209.9ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:56:50,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2021-06-05 07:56:50,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2013. [2021-06-05 07:56:50,723 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) [2021-06-05 07:56:50,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 5533 transitions. [2021-06-05 07:56:50,728 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 5533 transitions. Word has length 65 [2021-06-05 07:56:50,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:50,728 INFO L482 AbstractCegarLoop]: Abstraction has 2013 states and 5533 transitions. [2021-06-05 07:56:50,728 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) [2021-06-05 07:56:50,728 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 5533 transitions. [2021-06-05 07:56:50,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:56:50,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:50,731 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] [2021-06-05 07:56:50,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 07:56:50,945 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:50,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:50,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1991900067, now seen corresponding path program 20 times [2021-06-05 07:56:50,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:50,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043308397] [2021-06-05 07:56:50,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:50,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:51,038 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:56:51,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:51,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043308397] [2021-06-05 07:56:51,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043308397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:51,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689024363] [2021-06-05 07:56:51,039 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 [2021-06-05 07:56:51,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:56:51,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:51,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:56:51,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:56:51,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689024363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:51,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:51,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 07:56:51,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192503528] [2021-06-05 07:56:51,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:56:51,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:51,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:56:51,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:56:51,214 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) [2021-06-05 07:56:51,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:51,374 INFO L93 Difference]: Finished difference Result 2721 states and 7077 transitions. [2021-06-05 07:56:51,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 07:56:51,374 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 [2021-06-05 07:56:51,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:51,376 INFO L225 Difference]: With dead ends: 2721 [2021-06-05 07:56:51,376 INFO L226 Difference]: Without dead ends: 2436 [2021-06-05 07:56:51,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 144.3ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:56:51,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-06-05 07:56:51,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1988. [2021-06-05 07:56:51,393 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) [2021-06-05 07:56:51,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 5483 transitions. [2021-06-05 07:56:51,396 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 5483 transitions. Word has length 65 [2021-06-05 07:56:51,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:51,396 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 5483 transitions. [2021-06-05 07:56:51,396 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) [2021-06-05 07:56:51,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 5483 transitions. [2021-06-05 07:56:51,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:56:51,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:51,399 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] [2021-06-05 07:56:51,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:51,604 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:51,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:51,604 INFO L82 PathProgramCache]: Analyzing trace with hash 596560781, now seen corresponding path program 21 times [2021-06-05 07:56:51,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:51,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502722316] [2021-06-05 07:56:51,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:51,683 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:56:51,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:51,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502722316] [2021-06-05 07:56:51,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502722316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:51,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532295188] [2021-06-05 07:56:51,683 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 [2021-06-05 07:56:51,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:56:51,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:51,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:56:51,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:51,856 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:56:51,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532295188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:51,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:51,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 07:56:51,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015961940] [2021-06-05 07:56:51,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:56:51,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:51,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:56:51,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:56:51,857 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) [2021-06-05 07:56:52,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:52,077 INFO L93 Difference]: Finished difference Result 2646 states and 6927 transitions. [2021-06-05 07:56:52,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:56:52,078 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 [2021-06-05 07:56:52,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:52,081 INFO L225 Difference]: With dead ends: 2646 [2021-06-05 07:56:52,081 INFO L226 Difference]: Without dead ends: 2361 [2021-06-05 07:56:52,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 208.7ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:56:52,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-06-05 07:56:52,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 1963. [2021-06-05 07:56:52,104 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) [2021-06-05 07:56:52,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 5433 transitions. [2021-06-05 07:56:52,108 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 5433 transitions. Word has length 65 [2021-06-05 07:56:52,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:52,108 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 5433 transitions. [2021-06-05 07:56:52,108 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) [2021-06-05 07:56:52,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 5433 transitions. [2021-06-05 07:56:52,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:56:52,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:52,111 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] [2021-06-05 07:56:52,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 07:56:52,332 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:52,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:52,333 INFO L82 PathProgramCache]: Analyzing trace with hash 797376750, now seen corresponding path program 22 times [2021-06-05 07:56:52,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:52,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484914360] [2021-06-05 07:56:52,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:52,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:52,430 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:52,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:52,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484914360] [2021-06-05 07:56:52,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484914360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:52,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325662767] [2021-06-05 07:56:52,431 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 [2021-06-05 07:56:52,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:56:52,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:52,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:56:52,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:52,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325662767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:52,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:52,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 07:56:52,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494755727] [2021-06-05 07:56:52,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:56:52,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:52,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:56:52,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:56:52,700 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) [2021-06-05 07:56:52,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:52,930 INFO L93 Difference]: Finished difference Result 3055 states and 8279 transitions. [2021-06-05 07:56:52,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:56:52,931 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 [2021-06-05 07:56:52,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:52,933 INFO L225 Difference]: With dead ends: 3055 [2021-06-05 07:56:52,933 INFO L226 Difference]: Without dead ends: 2446 [2021-06-05 07:56:52,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 245.5ms TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:56:52,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2021-06-05 07:56:52,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2028. [2021-06-05 07:56:52,951 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) [2021-06-05 07:56:52,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5683 transitions. [2021-06-05 07:56:52,953 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5683 transitions. Word has length 65 [2021-06-05 07:56:52,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:52,953 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5683 transitions. [2021-06-05 07:56:52,954 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) [2021-06-05 07:56:52,954 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5683 transitions. [2021-06-05 07:56:52,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 07:56:52,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:52,956 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] [2021-06-05 07:56:53,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 07:56:53,156 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:53,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:53,157 INFO L82 PathProgramCache]: Analyzing trace with hash 2053970119, now seen corresponding path program 23 times [2021-06-05 07:56:53,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:53,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511432730] [2021-06-05 07:56:53,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:53,264 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:53,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:53,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511432730] [2021-06-05 07:56:53,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511432730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:53,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699782471] [2021-06-05 07:56:53,265 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 [2021-06-05 07:56:53,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:56:53,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:53,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:56:53,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:53,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699782471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:53,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:53,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-06-05 07:56:53,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703591335] [2021-06-05 07:56:53,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:56:53,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:53,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:56:53,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:56:53,455 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) [2021-06-05 07:56:53,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:53,670 INFO L93 Difference]: Finished difference Result 2868 states and 7683 transitions. [2021-06-05 07:56:53,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:56:53,670 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 [2021-06-05 07:56:53,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:53,673 INFO L225 Difference]: With dead ends: 2868 [2021-06-05 07:56:53,673 INFO L226 Difference]: Without dead ends: 2534 [2021-06-05 07:56:53,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 232.6ms TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:56:53,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-06-05 07:56:53,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 2113. [2021-06-05 07:56:53,697 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) [2021-06-05 07:56:53,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 5853 transitions. [2021-06-05 07:56:53,701 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 5853 transitions. Word has length 70 [2021-06-05 07:56:53,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:53,701 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 5853 transitions. [2021-06-05 07:56:53,701 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) [2021-06-05 07:56:53,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 5853 transitions. [2021-06-05 07:56:53,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 07:56:53,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:53,704 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] [2021-06-05 07:56:53,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 07:56:53,916 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:53,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:53,917 INFO L82 PathProgramCache]: Analyzing trace with hash -778605685, now seen corresponding path program 24 times [2021-06-05 07:56:53,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:53,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751506265] [2021-06-05 07:56:53,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:53,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:54,018 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:54,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:54,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751506265] [2021-06-05 07:56:54,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751506265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:54,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949509162] [2021-06-05 07:56:54,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:54,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:56:54,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:54,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 07:56:54,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:54,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949509162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:54,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:54,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 07:56:54,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900126570] [2021-06-05 07:56:54,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:56:54,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:54,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:56:54,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:56:54,207 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) [2021-06-05 07:56:54,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:54,401 INFO L93 Difference]: Finished difference Result 3061 states and 7877 transitions. [2021-06-05 07:56:54,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:56:54,401 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 [2021-06-05 07:56:54,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:54,404 INFO L225 Difference]: With dead ends: 3061 [2021-06-05 07:56:54,404 INFO L226 Difference]: Without dead ends: 2791 [2021-06-05 07:56:54,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 203.2ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:56:54,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-06-05 07:56:54,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2128. [2021-06-05 07:56:54,425 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) [2021-06-05 07:56:54,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-06-05 07:56:54,427 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-06-05 07:56:54,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:54,427 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-06-05 07:56:54,427 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) [2021-06-05 07:56:54,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-06-05 07:56:54,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 07:56:54,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:54,430 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] [2021-06-05 07:56:54,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 07:56:54,640 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:54,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:54,641 INFO L82 PathProgramCache]: Analyzing trace with hash 220290651, now seen corresponding path program 25 times [2021-06-05 07:56:54,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:54,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505216406] [2021-06-05 07:56:54,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:54,747 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:54,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:54,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505216406] [2021-06-05 07:56:54,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505216406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:54,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624544476] [2021-06-05 07:56:54,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:54,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:54,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 07:56:54,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:54,948 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:54,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624544476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:54,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:54,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 07:56:54,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73923597] [2021-06-05 07:56:54,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:56:54,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:54,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:56:54,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:56:54,950 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) [2021-06-05 07:56:55,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:55,172 INFO L93 Difference]: Finished difference Result 2946 states and 7647 transitions. [2021-06-05 07:56:55,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:56:55,173 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 [2021-06-05 07:56:55,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:55,175 INFO L225 Difference]: With dead ends: 2946 [2021-06-05 07:56:55,176 INFO L226 Difference]: Without dead ends: 2676 [2021-06-05 07:56:55,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 238.0ms TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:56:55,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-06-05 07:56:55,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 2128. [2021-06-05 07:56:55,193 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) [2021-06-05 07:56:55,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-06-05 07:56:55,196 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-06-05 07:56:55,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:55,196 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-06-05 07:56:55,196 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) [2021-06-05 07:56:55,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-06-05 07:56:55,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 07:56:55,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:55,198 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] [2021-06-05 07:56:55,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 07:56:55,401 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:55,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:55,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1659037239, now seen corresponding path program 26 times [2021-06-05 07:56:55,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:55,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150038803] [2021-06-05 07:56:55,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:55,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:55,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:55,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150038803] [2021-06-05 07:56:55,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150038803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:55,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650094001] [2021-06-05 07:56:55,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:55,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:56:55,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:55,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 07:56:55,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:55,661 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:55,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650094001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:55,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:55,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 07:56:55,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361541787] [2021-06-05 07:56:55,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:56:55,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:55,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:56:55,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:56:55,663 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) [2021-06-05 07:56:55,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:55,862 INFO L93 Difference]: Finished difference Result 2921 states and 7597 transitions. [2021-06-05 07:56:55,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:56:55,862 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 [2021-06-05 07:56:55,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:55,865 INFO L225 Difference]: With dead ends: 2921 [2021-06-05 07:56:55,865 INFO L226 Difference]: Without dead ends: 2651 [2021-06-05 07:56:55,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 190.3ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:56:55,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2021-06-05 07:56:55,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2128. [2021-06-05 07:56:55,883 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) [2021-06-05 07:56:55,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-06-05 07:56:55,886 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-06-05 07:56:55,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:55,886 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-06-05 07:56:55,886 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) [2021-06-05 07:56:55,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-06-05 07:56:55,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 07:56:55,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:55,889 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] [2021-06-05 07:56:56,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:56,106 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:56,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:56,106 INFO L82 PathProgramCache]: Analyzing trace with hash 371282073, now seen corresponding path program 27 times [2021-06-05 07:56:56,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:56,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858778476] [2021-06-05 07:56:56,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:56,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:56,209 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:56,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:56,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858778476] [2021-06-05 07:56:56,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858778476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:56,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347755034] [2021-06-05 07:56:56,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:56,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 07:56:56,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:56,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 07:56:56,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:56,456 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:56,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347755034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:56,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:56,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 07:56:56,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360451142] [2021-06-05 07:56:56,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:56:56,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:56,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:56:56,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:56:56,458 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) [2021-06-05 07:56:56,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:56,758 INFO L93 Difference]: Finished difference Result 2871 states and 7497 transitions. [2021-06-05 07:56:56,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:56:56,758 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 [2021-06-05 07:56:56,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:56,761 INFO L225 Difference]: With dead ends: 2871 [2021-06-05 07:56:56,761 INFO L226 Difference]: Without dead ends: 2601 [2021-06-05 07:56:56,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 288.6ms TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:56:56,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-06-05 07:56:56,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2128. [2021-06-05 07:56:56,789 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) [2021-06-05 07:56:56,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-06-05 07:56:56,792 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-06-05 07:56:56,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:56,793 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-06-05 07:56:56,793 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) [2021-06-05 07:56:56,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-06-05 07:56:56,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 07:56:56,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:56,796 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] [2021-06-05 07:56:57,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:57,009 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:57,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:57,009 INFO L82 PathProgramCache]: Analyzing trace with hash 985521543, now seen corresponding path program 28 times [2021-06-05 07:56:57,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:57,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953001535] [2021-06-05 07:56:57,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:57,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:57,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:57,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953001535] [2021-06-05 07:56:57,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953001535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:57,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609265460] [2021-06-05 07:56:57,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:57,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:56:57,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:57,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 07:56:57,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:57,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609265460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:57,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:57,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 07:56:57,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534920216] [2021-06-05 07:56:57,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:56:57,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:57,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:56:57,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:56:57,243 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) [2021-06-05 07:56:57,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:57,461 INFO L93 Difference]: Finished difference Result 2821 states and 7397 transitions. [2021-06-05 07:56:57,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:56:57,461 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 [2021-06-05 07:56:57,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:57,465 INFO L225 Difference]: With dead ends: 2821 [2021-06-05 07:56:57,465 INFO L226 Difference]: Without dead ends: 2551 [2021-06-05 07:56:57,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 202.1ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:56:57,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2021-06-05 07:56:57,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 2128. [2021-06-05 07:56:57,488 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) [2021-06-05 07:56:57,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-06-05 07:56:57,492 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-06-05 07:56:57,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:57,494 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-06-05 07:56:57,494 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) [2021-06-05 07:56:57,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-06-05 07:56:57,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 07:56:57,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:57,497 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] [2021-06-05 07:56:57,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 07:56:57,713 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:57,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:57,713 INFO L82 PathProgramCache]: Analyzing trace with hash -729720745, now seen corresponding path program 29 times [2021-06-05 07:56:57,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:57,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551852304] [2021-06-05 07:56:57,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:57,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:57,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551852304] [2021-06-05 07:56:57,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551852304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:57,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518016235] [2021-06-05 07:56:57,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:57,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:56:57,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:57,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 07:56:57,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:57,971 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:57,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518016235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:57,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:57,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 07:56:57,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662552772] [2021-06-05 07:56:57,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:56:57,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:57,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:56:57,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:56:57,973 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) [2021-06-05 07:56:58,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:58,291 INFO L93 Difference]: Finished difference Result 2831 states and 7447 transitions. [2021-06-05 07:56:58,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:56:58,291 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 [2021-06-05 07:56:58,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:58,295 INFO L225 Difference]: With dead ends: 2831 [2021-06-05 07:56:58,295 INFO L226 Difference]: Without dead ends: 2561 [2021-06-05 07:56:58,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 297.4ms TimeCoverageRelationStatistics Valid=267, Invalid=789, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:56:58,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2021-06-05 07:56:58,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 2128. [2021-06-05 07:56:58,350 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) [2021-06-05 07:56:58,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5888 transitions. [2021-06-05 07:56:58,354 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5888 transitions. Word has length 70 [2021-06-05 07:56:58,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:58,355 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5888 transitions. [2021-06-05 07:56:58,355 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) [2021-06-05 07:56:58,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5888 transitions. [2021-06-05 07:56:58,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 07:56:58,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:58,358 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] [2021-06-05 07:56:58,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:58,581 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:58,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:58,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1762368347, now seen corresponding path program 30 times [2021-06-05 07:56:58,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:58,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442651482] [2021-06-05 07:56:58,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:58,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:58,666 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:58,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:58,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442651482] [2021-06-05 07:56:58,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442651482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:58,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340751435] [2021-06-05 07:56:58,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:56:58,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:56:58,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:56:58,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 07:56:58,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:58,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340751435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:58,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:58,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 07:56:58,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688060779] [2021-06-05 07:56:58,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:56:58,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:58,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:56:58,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:56:58,824 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) [2021-06-05 07:56:59,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:56:59,066 INFO L93 Difference]: Finished difference Result 3598 states and 9621 transitions. [2021-06-05 07:56:59,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:56:59,067 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 [2021-06-05 07:56:59,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:56:59,070 INFO L225 Difference]: With dead ends: 3598 [2021-06-05 07:56:59,070 INFO L226 Difference]: Without dead ends: 3328 [2021-06-05 07:56:59,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 215.2ms TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:56:59,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2021-06-05 07:56:59,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 2308. [2021-06-05 07:56:59,098 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) [2021-06-05 07:56:59,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 6447 transitions. [2021-06-05 07:56:59,102 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 6447 transitions. Word has length 70 [2021-06-05 07:56:59,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:56:59,103 INFO L482 AbstractCegarLoop]: Abstraction has 2308 states and 6447 transitions. [2021-06-05 07:56:59,103 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) [2021-06-05 07:56:59,103 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 6447 transitions. [2021-06-05 07:56:59,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 07:56:59,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:56:59,105 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] [2021-06-05 07:56:59,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 07:56:59,321 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:56:59,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:56:59,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1740025097, now seen corresponding path program 31 times [2021-06-05 07:56:59,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:56:59,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464949440] [2021-06-05 07:56:59,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:56:59,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:59,417 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:59,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:56:59,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464949440] [2021-06-05 07:56:59,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464949440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:59,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170931440] [2021-06-05 07:56:59,417 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 [2021-06-05 07:56:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:56:59,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 07:56:59,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:56:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:56:59,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170931440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:56:59,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:56:59,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 07:56:59,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681669605] [2021-06-05 07:56:59,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:56:59,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:56:59,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:56:59,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:56:59,610 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) [2021-06-05 07:57:00,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:00,008 INFO L93 Difference]: Finished difference Result 3421 states and 9121 transitions. [2021-06-05 07:57:00,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:57:00,009 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 [2021-06-05 07:57:00,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:00,012 INFO L225 Difference]: With dead ends: 3421 [2021-06-05 07:57:00,012 INFO L226 Difference]: Without dead ends: 2846 [2021-06-05 07:57:00,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 363.3ms TimeCoverageRelationStatistics Valid=357, Invalid=1049, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 07:57:00,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-06-05 07:57:00,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 1803. [2021-06-05 07:57:00,030 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) [2021-06-05 07:57:00,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 4918 transitions. [2021-06-05 07:57:00,033 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 4918 transitions. Word has length 70 [2021-06-05 07:57:00,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:00,033 INFO L482 AbstractCegarLoop]: Abstraction has 1803 states and 4918 transitions. [2021-06-05 07:57:00,033 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) [2021-06-05 07:57:00,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 4918 transitions. [2021-06-05 07:57:00,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:00,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:00,035 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] [2021-06-05 07:57:00,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:00,235 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:00,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:00,236 INFO L82 PathProgramCache]: Analyzing trace with hash 751678088, now seen corresponding path program 32 times [2021-06-05 07:57:00,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:00,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359808093] [2021-06-05 07:57:00,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:00,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:00,344 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:00,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:00,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359808093] [2021-06-05 07:57:00,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359808093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:00,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398677996] [2021-06-05 07:57:00,345 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 [2021-06-05 07:57:00,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:57:00,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:00,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:57:00,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:00,512 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:00,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398677996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:00,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:00,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 07:57:00,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61585398] [2021-06-05 07:57:00,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:57:00,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:00,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:57:00,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:57:00,513 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) [2021-06-05 07:57:00,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:00,733 INFO L93 Difference]: Finished difference Result 2621 states and 6757 transitions. [2021-06-05 07:57:00,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:57:00,733 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 [2021-06-05 07:57:00,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:00,736 INFO L225 Difference]: With dead ends: 2621 [2021-06-05 07:57:00,736 INFO L226 Difference]: Without dead ends: 2351 [2021-06-05 07:57:00,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 227.3ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:57:00,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-05 07:57:00,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1878. [2021-06-05 07:57:00,754 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) [2021-06-05 07:57:00,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 5143 transitions. [2021-06-05 07:57:00,756 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 5143 transitions. Word has length 75 [2021-06-05 07:57:00,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:00,756 INFO L482 AbstractCegarLoop]: Abstraction has 1878 states and 5143 transitions. [2021-06-05 07:57:00,756 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) [2021-06-05 07:57:00,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 5143 transitions. [2021-06-05 07:57:00,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:00,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:00,758 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] [2021-06-05 07:57:00,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 07:57:00,959 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:00,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:00,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1750574424, now seen corresponding path program 33 times [2021-06-05 07:57:00,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:00,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470730703] [2021-06-05 07:57:00,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:01,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:01,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470730703] [2021-06-05 07:57:01,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470730703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:01,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359043532] [2021-06-05 07:57:01,075 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 [2021-06-05 07:57:01,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 07:57:01,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:01,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:57:01,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:01,280 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:01,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359043532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:01,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:01,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 07:57:01,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231864706] [2021-06-05 07:57:01,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:57:01,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:01,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:57:01,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:57:01,281 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) [2021-06-05 07:57:01,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:01,523 INFO L93 Difference]: Finished difference Result 2841 states and 7272 transitions. [2021-06-05 07:57:01,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:57:01,523 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 [2021-06-05 07:57:01,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:01,526 INFO L225 Difference]: With dead ends: 2841 [2021-06-05 07:57:01,526 INFO L226 Difference]: Without dead ends: 2571 [2021-06-05 07:57:01,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 266.0ms TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:57:01,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-06-05 07:57:01,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 1953. [2021-06-05 07:57:01,546 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) [2021-06-05 07:57:01,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 5368 transitions. [2021-06-05 07:57:01,549 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 5368 transitions. Word has length 75 [2021-06-05 07:57:01,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:01,549 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 5368 transitions. [2021-06-05 07:57:01,549 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) [2021-06-05 07:57:01,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 5368 transitions. [2021-06-05 07:57:01,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:01,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:01,551 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] [2021-06-05 07:57:01,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 07:57:01,752 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:01,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:01,752 INFO L82 PathProgramCache]: Analyzing trace with hash -128753466, now seen corresponding path program 34 times [2021-06-05 07:57:01,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:01,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209758958] [2021-06-05 07:57:01,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:01,847 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:01,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:01,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209758958] [2021-06-05 07:57:01,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209758958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:01,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849013727] [2021-06-05 07:57:01,847 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 [2021-06-05 07:57:01,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:57:01,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:01,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:57:01,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:02,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849013727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:02,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:02,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 07:57:02,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386908762] [2021-06-05 07:57:02,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:57:02,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:02,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:57:02,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:57:02,005 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) [2021-06-05 07:57:02,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:02,227 INFO L93 Difference]: Finished difference Result 2871 states and 7407 transitions. [2021-06-05 07:57:02,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:57:02,227 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 [2021-06-05 07:57:02,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:02,229 INFO L225 Difference]: With dead ends: 2871 [2021-06-05 07:57:02,229 INFO L226 Difference]: Without dead ends: 2601 [2021-06-05 07:57:02,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 219.1ms TimeCoverageRelationStatistics Valid=248, Invalid=744, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:57:02,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-06-05 07:57:02,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2028. [2021-06-05 07:57:02,248 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) [2021-06-05 07:57:02,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5593 transitions. [2021-06-05 07:57:02,252 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5593 transitions. Word has length 75 [2021-06-05 07:57:02,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:02,252 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5593 transitions. [2021-06-05 07:57:02,253 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) [2021-06-05 07:57:02,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5593 transitions. [2021-06-05 07:57:02,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:02,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:02,255 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] [2021-06-05 07:57:02,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 07:57:02,477 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:02,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:02,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1901565846, now seen corresponding path program 35 times [2021-06-05 07:57:02,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:02,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370661437] [2021-06-05 07:57:02,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:02,583 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:02,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:02,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370661437] [2021-06-05 07:57:02,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370661437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:02,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524724579] [2021-06-05 07:57:02,583 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 [2021-06-05 07:57:02,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:57:02,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:02,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:57:02,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:02,784 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:02,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524724579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:02,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:02,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 07:57:02,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805463678] [2021-06-05 07:57:02,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:57:02,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:02,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:57:02,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:57:02,785 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) [2021-06-05 07:57:03,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:03,091 INFO L93 Difference]: Finished difference Result 2896 states and 7532 transitions. [2021-06-05 07:57:03,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:57:03,091 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 [2021-06-05 07:57:03,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:03,094 INFO L225 Difference]: With dead ends: 2896 [2021-06-05 07:57:03,094 INFO L226 Difference]: Without dead ends: 2626 [2021-06-05 07:57:03,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 303.0ms TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:57:03,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-06-05 07:57:03,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 2103. [2021-06-05 07:57:03,114 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) [2021-06-05 07:57:03,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 5818 transitions. [2021-06-05 07:57:03,117 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 5818 transitions. Word has length 75 [2021-06-05 07:57:03,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:03,117 INFO L482 AbstractCegarLoop]: Abstraction has 2103 states and 5818 transitions. [2021-06-05 07:57:03,117 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) [2021-06-05 07:57:03,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 5818 transitions. [2021-06-05 07:57:03,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:03,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:03,119 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] [2021-06-05 07:57:03,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 07:57:03,319 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:03,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:03,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1779161980, now seen corresponding path program 36 times [2021-06-05 07:57:03,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:03,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007068433] [2021-06-05 07:57:03,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:03,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:03,417 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:03,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:03,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007068433] [2021-06-05 07:57:03,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007068433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:03,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031198627] [2021-06-05 07:57:03,418 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 [2021-06-05 07:57:03,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:57:03,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:03,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:57:03,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:03,616 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:03,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031198627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:03,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:03,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 07:57:03,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711424811] [2021-06-05 07:57:03,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:57:03,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:03,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:57:03,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:57:03,617 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) [2021-06-05 07:57:03,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:03,880 INFO L93 Difference]: Finished difference Result 2966 states and 7777 transitions. [2021-06-05 07:57:03,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:57:03,880 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 [2021-06-05 07:57:03,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:03,883 INFO L225 Difference]: With dead ends: 2966 [2021-06-05 07:57:03,883 INFO L226 Difference]: Without dead ends: 2696 [2021-06-05 07:57:03,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 250.3ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:57:03,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-06-05 07:57:03,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2178. [2021-06-05 07:57:03,904 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) [2021-06-05 07:57:03,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 6058 transitions. [2021-06-05 07:57:03,907 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 6058 transitions. Word has length 75 [2021-06-05 07:57:03,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:03,907 INFO L482 AbstractCegarLoop]: Abstraction has 2178 states and 6058 transitions. [2021-06-05 07:57:03,907 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) [2021-06-05 07:57:03,907 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 6058 transitions. [2021-06-05 07:57:03,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:03,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:03,910 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] [2021-06-05 07:57:04,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:04,113 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:04,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:04,113 INFO L82 PathProgramCache]: Analyzing trace with hash 800563028, now seen corresponding path program 37 times [2021-06-05 07:57:04,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:04,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279456] [2021-06-05 07:57:04,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:04,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:04,214 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:04,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:04,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279456] [2021-06-05 07:57:04,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:04,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610698294] [2021-06-05 07:57:04,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:04,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:57:04,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:04,378 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:04,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610698294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:04,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:04,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 07:57:04,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537660378] [2021-06-05 07:57:04,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:57:04,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:04,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:57:04,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:57:04,380 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) [2021-06-05 07:57:04,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:04,782 INFO L93 Difference]: Finished difference Result 3544 states and 9403 transitions. [2021-06-05 07:57:04,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:57:04,783 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 [2021-06-05 07:57:04,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:04,786 INFO L225 Difference]: With dead ends: 3544 [2021-06-05 07:57:04,786 INFO L226 Difference]: Without dead ends: 2921 [2021-06-05 07:57:04,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 355.8ms TimeCoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 07:57:04,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-06-05 07:57:04,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2253. [2021-06-05 07:57:04,807 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) [2021-06-05 07:57:04,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6288 transitions. [2021-06-05 07:57:04,810 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6288 transitions. Word has length 75 [2021-06-05 07:57:04,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:04,810 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6288 transitions. [2021-06-05 07:57:04,810 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) [2021-06-05 07:57:04,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6288 transitions. [2021-06-05 07:57:04,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:04,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:04,813 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] [2021-06-05 07:57:05,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:05,014 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:05,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:05,014 INFO L82 PathProgramCache]: Analyzing trace with hash -232084574, now seen corresponding path program 38 times [2021-06-05 07:57:05,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:05,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656080327] [2021-06-05 07:57:05,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:05,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:05,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:05,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656080327] [2021-06-05 07:57:05,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656080327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:05,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888763271] [2021-06-05 07:57:05,108 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 [2021-06-05 07:57:05,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:57:05,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:05,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:57:05,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:05,286 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:05,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888763271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:05,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:05,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 07:57:05,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936405497] [2021-06-05 07:57:05,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:57:05,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:05,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:57:05,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:57:05,287 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) [2021-06-05 07:57:05,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:05,634 INFO L93 Difference]: Finished difference Result 3748 states and 10071 transitions. [2021-06-05 07:57:05,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:57:05,635 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 [2021-06-05 07:57:05,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:05,640 INFO L225 Difference]: With dead ends: 3748 [2021-06-05 07:57:05,640 INFO L226 Difference]: Without dead ends: 3478 [2021-06-05 07:57:05,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 299.7ms TimeCoverageRelationStatistics Valid=355, Invalid=905, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:57:05,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-06-05 07:57:05,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 2433. [2021-06-05 07:57:05,675 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) [2021-06-05 07:57:05,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 6847 transitions. [2021-06-05 07:57:05,679 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 6847 transitions. Word has length 75 [2021-06-05 07:57:05,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:05,680 INFO L482 AbstractCegarLoop]: Abstraction has 2433 states and 6847 transitions. [2021-06-05 07:57:05,680 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) [2021-06-05 07:57:05,680 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 6847 transitions. [2021-06-05 07:57:05,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:05,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:05,682 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] [2021-06-05 07:57:05,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:05,905 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:05,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:05,905 INFO L82 PathProgramCache]: Analyzing trace with hash -209741324, now seen corresponding path program 39 times [2021-06-05 07:57:05,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:05,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605995001] [2021-06-05 07:57:05,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:05,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:05,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:05,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605995001] [2021-06-05 07:57:05,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605995001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:05,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966604798] [2021-06-05 07:57:05,995 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 [2021-06-05 07:57:06,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 07:57:06,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:06,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:57:06,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:06,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966604798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:06,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:06,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 07:57:06,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570615594] [2021-06-05 07:57:06,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:57:06,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:06,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:57:06,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:57:06,151 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) [2021-06-05 07:57:06,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:06,550 INFO L93 Difference]: Finished difference Result 3210 states and 8721 transitions. [2021-06-05 07:57:06,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:57:06,551 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 [2021-06-05 07:57:06,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:06,553 INFO L225 Difference]: With dead ends: 3210 [2021-06-05 07:57:06,553 INFO L226 Difference]: Without dead ends: 2721 [2021-06-05 07:57:06,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 336.4ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:57:06,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2021-06-05 07:57:06,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2378. [2021-06-05 07:57:06,572 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) [2021-06-05 07:57:06,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6683 transitions. [2021-06-05 07:57:06,575 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6683 transitions. Word has length 75 [2021-06-05 07:57:06,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:06,575 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6683 transitions. [2021-06-05 07:57:06,576 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) [2021-06-05 07:57:06,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6683 transitions. [2021-06-05 07:57:06,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:06,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:06,577 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] [2021-06-05 07:57:06,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:06,778 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:06,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:06,778 INFO L82 PathProgramCache]: Analyzing trace with hash 452139800, now seen corresponding path program 40 times [2021-06-05 07:57:06,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:06,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189841796] [2021-06-05 07:57:06,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:06,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:06,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:06,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189841796] [2021-06-05 07:57:06,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189841796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:06,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918099858] [2021-06-05 07:57:06,911 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 [2021-06-05 07:57:06,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:57:06,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:06,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 07:57:06,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:07,124 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:07,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918099858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:07,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:07,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 07:57:07,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474481115] [2021-06-05 07:57:07,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:57:07,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:07,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:57:07,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:57:07,126 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) [2021-06-05 07:57:07,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:07,343 INFO L93 Difference]: Finished difference Result 2948 states and 7951 transitions. [2021-06-05 07:57:07,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:57:07,343 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 [2021-06-05 07:57:07,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:07,346 INFO L225 Difference]: With dead ends: 2948 [2021-06-05 07:57:07,347 INFO L226 Difference]: Without dead ends: 2678 [2021-06-05 07:57:07,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 249.2ms TimeCoverageRelationStatistics Valid=260, Invalid=732, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:57:07,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2021-06-05 07:57:07,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 2463. [2021-06-05 07:57:07,366 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) [2021-06-05 07:57:07,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 6853 transitions. [2021-06-05 07:57:07,369 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 6853 transitions. Word has length 80 [2021-06-05 07:57:07,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:07,369 INFO L482 AbstractCegarLoop]: Abstraction has 2463 states and 6853 transitions. [2021-06-05 07:57:07,369 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) [2021-06-05 07:57:07,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 6853 transitions. [2021-06-05 07:57:07,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:07,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:07,371 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] [2021-06-05 07:57:07,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 07:57:07,572 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:07,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:07,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1173866716, now seen corresponding path program 41 times [2021-06-05 07:57:07,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:07,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742773765] [2021-06-05 07:57:07,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:07,684 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:07,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:07,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742773765] [2021-06-05 07:57:07,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742773765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:07,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129907721] [2021-06-05 07:57:07,685 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 [2021-06-05 07:57:07,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:57:07,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:07,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:57:07,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:07,900 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:07,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129907721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:07,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:07,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 07:57:07,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662037915] [2021-06-05 07:57:07,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:57:07,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:07,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:57:07,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:57:07,902 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) [2021-06-05 07:57:08,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:08,083 INFO L93 Difference]: Finished difference Result 3561 states and 9177 transitions. [2021-06-05 07:57:08,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:57:08,083 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 [2021-06-05 07:57:08,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:08,086 INFO L225 Difference]: With dead ends: 3561 [2021-06-05 07:57:08,087 INFO L226 Difference]: Without dead ends: 3291 [2021-06-05 07:57:08,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 191.6ms TimeCoverageRelationStatistics Valid=196, Invalid=560, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:57:08,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3291 states. [2021-06-05 07:57:08,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3291 to 2478. [2021-06-05 07:57:08,108 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) [2021-06-05 07:57:08,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-05 07:57:08,111 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-05 07:57:08,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:08,111 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-05 07:57:08,112 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) [2021-06-05 07:57:08,112 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-05 07:57:08,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:08,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:08,114 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] [2021-06-05 07:57:08,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:08,315 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:08,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:08,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1794345044, now seen corresponding path program 42 times [2021-06-05 07:57:08,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:08,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214564132] [2021-06-05 07:57:08,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:08,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:08,439 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:08,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:08,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214564132] [2021-06-05 07:57:08,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214564132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:08,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401683253] [2021-06-05 07:57:08,439 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 [2021-06-05 07:57:08,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:57:08,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:08,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:57:08,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:08,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401683253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:08,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:08,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 07:57:08,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081071181] [2021-06-05 07:57:08,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:57:08,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:08,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:57:08,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:57:08,623 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) [2021-06-05 07:57:08,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:08,907 INFO L93 Difference]: Finished difference Result 3446 states and 8947 transitions. [2021-06-05 07:57:08,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:57:08,907 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 [2021-06-05 07:57:08,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:08,910 INFO L225 Difference]: With dead ends: 3446 [2021-06-05 07:57:08,910 INFO L226 Difference]: Without dead ends: 3176 [2021-06-05 07:57:08,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 293.2ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:57:08,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-05 07:57:08,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2478. [2021-06-05 07:57:08,929 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) [2021-06-05 07:57:08,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-05 07:57:08,932 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-05 07:57:08,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:08,933 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-05 07:57:08,933 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) [2021-06-05 07:57:08,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-05 07:57:08,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:08,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:08,935 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] [2021-06-05 07:57:09,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 07:57:09,135 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:09,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:09,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1340128870, now seen corresponding path program 43 times [2021-06-05 07:57:09,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:09,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142290343] [2021-06-05 07:57:09,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:09,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:09,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:09,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142290343] [2021-06-05 07:57:09,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142290343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:09,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974331514] [2021-06-05 07:57:09,250 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 [2021-06-05 07:57:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:09,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:57:09,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:09,442 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:09,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974331514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:09,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:09,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 07:57:09,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135220036] [2021-06-05 07:57:09,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:57:09,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:09,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:57:09,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:57:09,443 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) [2021-06-05 07:57:09,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:09,687 INFO L93 Difference]: Finished difference Result 3421 states and 8897 transitions. [2021-06-05 07:57:09,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:57:09,687 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 [2021-06-05 07:57:09,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:09,690 INFO L225 Difference]: With dead ends: 3421 [2021-06-05 07:57:09,690 INFO L226 Difference]: Without dead ends: 3151 [2021-06-05 07:57:09,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 224.7ms TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-06-05 07:57:09,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-05 07:57:09,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2478. [2021-06-05 07:57:09,711 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) [2021-06-05 07:57:09,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-05 07:57:09,714 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-05 07:57:09,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:09,714 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-05 07:57:09,714 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) [2021-06-05 07:57:09,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-05 07:57:09,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:09,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:09,716 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] [2021-06-05 07:57:09,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:09,917 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:09,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:09,917 INFO L82 PathProgramCache]: Analyzing trace with hash -341232534, now seen corresponding path program 44 times [2021-06-05 07:57:09,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:09,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329303111] [2021-06-05 07:57:09,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:10,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:10,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329303111] [2021-06-05 07:57:10,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329303111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:10,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224288401] [2021-06-05 07:57:10,036 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 [2021-06-05 07:57:10,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:57:10,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:10,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:57:10,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:10,244 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:10,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224288401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:10,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:10,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 07:57:10,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385071662] [2021-06-05 07:57:10,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:57:10,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:10,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:57:10,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:57:10,246 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) [2021-06-05 07:57:10,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:10,539 INFO L93 Difference]: Finished difference Result 3371 states and 8797 transitions. [2021-06-05 07:57:10,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:57:10,540 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 [2021-06-05 07:57:10,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:10,543 INFO L225 Difference]: With dead ends: 3371 [2021-06-05 07:57:10,543 INFO L226 Difference]: Without dead ends: 3101 [2021-06-05 07:57:10,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 297.3ms TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:57:10,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3101 states. [2021-06-05 07:57:10,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3101 to 2478. [2021-06-05 07:57:10,566 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) [2021-06-05 07:57:10,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-05 07:57:10,569 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-05 07:57:10,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:10,569 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-05 07:57:10,569 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) [2021-06-05 07:57:10,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-05 07:57:10,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:10,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:10,571 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] [2021-06-05 07:57:10,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 07:57:10,772 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:10,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:10,772 INFO L82 PathProgramCache]: Analyzing trace with hash 2074406872, now seen corresponding path program 45 times [2021-06-05 07:57:10,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:10,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112557396] [2021-06-05 07:57:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:10,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:10,865 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:10,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:10,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112557396] [2021-06-05 07:57:10,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112557396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:10,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650847377] [2021-06-05 07:57:10,865 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 [2021-06-05 07:57:10,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:57:10,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:10,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:57:10,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:11,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650847377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:11,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:11,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 07:57:11,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325248513] [2021-06-05 07:57:11,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:57:11,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:11,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:57:11,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:57:11,033 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) [2021-06-05 07:57:11,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:11,274 INFO L93 Difference]: Finished difference Result 3321 states and 8697 transitions. [2021-06-05 07:57:11,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:57:11,274 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 [2021-06-05 07:57:11,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:11,278 INFO L225 Difference]: With dead ends: 3321 [2021-06-05 07:57:11,278 INFO L226 Difference]: Without dead ends: 3051 [2021-06-05 07:57:11,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 222.0ms TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:57:11,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-06-05 07:57:11,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 2478. [2021-06-05 07:57:11,304 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) [2021-06-05 07:57:11,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-05 07:57:11,309 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-05 07:57:11,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:11,309 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-05 07:57:11,309 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) [2021-06-05 07:57:11,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-05 07:57:11,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:11,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:11,312 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] [2021-06-05 07:57:11,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 07:57:11,529 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:11,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:11,529 INFO L82 PathProgramCache]: Analyzing trace with hash -190241112, now seen corresponding path program 46 times [2021-06-05 07:57:11,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:11,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146933855] [2021-06-05 07:57:11,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:11,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:11,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:11,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146933855] [2021-06-05 07:57:11,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146933855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:11,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559083795] [2021-06-05 07:57:11,628 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 [2021-06-05 07:57:11,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:57:11,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:11,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:57:11,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:11,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559083795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:11,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:11,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 07:57:11,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872220989] [2021-06-05 07:57:11,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:57:11,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:11,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:57:11,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:57:11,801 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) [2021-06-05 07:57:12,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:12,158 INFO L93 Difference]: Finished difference Result 3271 states and 8597 transitions. [2021-06-05 07:57:12,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:57:12,159 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 [2021-06-05 07:57:12,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:12,162 INFO L225 Difference]: With dead ends: 3271 [2021-06-05 07:57:12,162 INFO L226 Difference]: Without dead ends: 3001 [2021-06-05 07:57:12,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 338.2ms TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:57:12,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-06-05 07:57:12,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 2478. [2021-06-05 07:57:12,181 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) [2021-06-05 07:57:12,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-05 07:57:12,184 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-05 07:57:12,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:12,184 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-05 07:57:12,184 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) [2021-06-05 07:57:12,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-05 07:57:12,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:12,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:12,186 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] [2021-06-05 07:57:12,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 07:57:12,387 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:12,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:12,387 INFO L82 PathProgramCache]: Analyzing trace with hash 423998358, now seen corresponding path program 47 times [2021-06-05 07:57:12,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:12,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006747096] [2021-06-05 07:57:12,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:12,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:12,487 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:12,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:12,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006747096] [2021-06-05 07:57:12,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006747096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:12,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947383057] [2021-06-05 07:57:12,487 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 [2021-06-05 07:57:12,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:57:12,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:12,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:57:12,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:12,655 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:12,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947383057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:12,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:12,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 07:57:12,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030110987] [2021-06-05 07:57:12,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:57:12,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:12,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:57:12,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:57:12,656 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) [2021-06-05 07:57:12,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:12,980 INFO L93 Difference]: Finished difference Result 3221 states and 8497 transitions. [2021-06-05 07:57:12,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:57:12,980 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 [2021-06-05 07:57:12,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:12,983 INFO L225 Difference]: With dead ends: 3221 [2021-06-05 07:57:12,983 INFO L226 Difference]: Without dead ends: 2951 [2021-06-05 07:57:12,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 296.9ms TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:57:12,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-06-05 07:57:13,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2478. [2021-06-05 07:57:13,010 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) [2021-06-05 07:57:13,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-05 07:57:13,015 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-05 07:57:13,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:13,015 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-05 07:57:13,016 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) [2021-06-05 07:57:13,016 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-05 07:57:13,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:13,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:13,018 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] [2021-06-05 07:57:13,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:13,233 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:13,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:13,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1291243930, now seen corresponding path program 48 times [2021-06-05 07:57:13,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:13,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445036162] [2021-06-05 07:57:13,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:13,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:13,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445036162] [2021-06-05 07:57:13,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445036162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:13,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118301437] [2021-06-05 07:57:13,331 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 [2021-06-05 07:57:13,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:57:13,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:13,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:57:13,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:13,490 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:13,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118301437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:13,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:13,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 07:57:13,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541609221] [2021-06-05 07:57:13,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:57:13,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:13,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:57:13,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:57:13,492 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) [2021-06-05 07:57:13,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:13,988 INFO L93 Difference]: Finished difference Result 3679 states and 9763 transitions. [2021-06-05 07:57:13,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:57:13,989 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 [2021-06-05 07:57:13,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:13,992 INFO L225 Difference]: With dead ends: 3679 [2021-06-05 07:57:13,992 INFO L226 Difference]: Without dead ends: 3056 [2021-06-05 07:57:13,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 420.3ms TimeCoverageRelationStatistics Valid=381, Invalid=1179, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 07:57:13,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-06-05 07:57:14,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2388. [2021-06-05 07:57:14,017 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) [2021-06-05 07:57:14,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6648 transitions. [2021-06-05 07:57:14,021 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6648 transitions. Word has length 80 [2021-06-05 07:57:14,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:14,022 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 6648 transitions. [2021-06-05 07:57:14,022 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) [2021-06-05 07:57:14,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6648 transitions. [2021-06-05 07:57:14,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:14,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:14,024 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] [2021-06-05 07:57:14,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:14,242 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:14,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:14,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1971075764, now seen corresponding path program 49 times [2021-06-05 07:57:14,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:14,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125906349] [2021-06-05 07:57:14,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:14,342 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:14,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:14,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125906349] [2021-06-05 07:57:14,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125906349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:14,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309410609] [2021-06-05 07:57:14,342 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 [2021-06-05 07:57:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:14,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:57:14,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:14,533 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:14,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309410609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:14,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:14,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 07:57:14,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005913612] [2021-06-05 07:57:14,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:57:14,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:14,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:57:14,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:57:14,535 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) [2021-06-05 07:57:14,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:14,910 INFO L93 Difference]: Finished difference Result 3908 states and 10481 transitions. [2021-06-05 07:57:14,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:57:14,910 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 [2021-06-05 07:57:14,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:14,915 INFO L225 Difference]: With dead ends: 3908 [2021-06-05 07:57:14,915 INFO L226 Difference]: Without dead ends: 3638 [2021-06-05 07:57:14,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 322.0ms TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:57:14,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3638 states. [2021-06-05 07:57:14,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3638 to 2568. [2021-06-05 07:57:14,950 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) [2021-06-05 07:57:14,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 7207 transitions. [2021-06-05 07:57:14,955 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 7207 transitions. Word has length 80 [2021-06-05 07:57:14,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:14,955 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 7207 transitions. [2021-06-05 07:57:14,955 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) [2021-06-05 07:57:14,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 7207 transitions. [2021-06-05 07:57:14,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:14,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:14,958 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] [2021-06-05 07:57:15,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 07:57:15,169 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:15,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:15,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1993419014, now seen corresponding path program 50 times [2021-06-05 07:57:15,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:15,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487676497] [2021-06-05 07:57:15,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:15,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:15,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487676497] [2021-06-05 07:57:15,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487676497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:15,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362108731] [2021-06-05 07:57:15,273 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 [2021-06-05 07:57:15,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:57:15,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:15,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:57:15,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:15,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362108731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:15,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:15,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 07:57:15,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018632848] [2021-06-05 07:57:15,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:57:15,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:15,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:57:15,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:57:15,442 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) [2021-06-05 07:57:15,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:15,877 INFO L93 Difference]: Finished difference Result 3203 states and 8605 transitions. [2021-06-05 07:57:15,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:57:15,878 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 [2021-06-05 07:57:15,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:15,881 INFO L225 Difference]: With dead ends: 3203 [2021-06-05 07:57:15,881 INFO L226 Difference]: Without dead ends: 2831 [2021-06-05 07:57:15,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 393.0ms TimeCoverageRelationStatistics Valid=416, Invalid=1066, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:57:15,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2831 states. [2021-06-05 07:57:15,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2831 to 2483. [2021-06-05 07:57:15,901 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) [2021-06-05 07:57:15,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 6923 transitions. [2021-06-05 07:57:15,904 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 6923 transitions. Word has length 80 [2021-06-05 07:57:15,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:15,904 INFO L482 AbstractCegarLoop]: Abstraction has 2483 states and 6923 transitions. [2021-06-05 07:57:15,904 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) [2021-06-05 07:57:15,905 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 6923 transitions. [2021-06-05 07:57:15,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 07:57:15,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:15,906 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] [2021-06-05 07:57:16,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 07:57:16,107 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:16,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:16,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1150498713, now seen corresponding path program 51 times [2021-06-05 07:57:16,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:16,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127717652] [2021-06-05 07:57:16,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:16,198 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 77 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:16,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:16,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127717652] [2021-06-05 07:57:16,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127717652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:16,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615550332] [2021-06-05 07:57:16,198 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 [2021-06-05 07:57:16,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:57:16,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:16,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:57:16,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:16,382 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:16,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615550332] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:57:16,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 07:57:16,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-06-05 07:57:16,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079023259] [2021-06-05 07:57:16,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:57:16,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:16,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:57:16,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:57:16,383 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) [2021-06-05 07:57:16,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:16,503 INFO L93 Difference]: Finished difference Result 5807 states and 15758 transitions. [2021-06-05 07:57:16,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 07:57:16,504 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 [2021-06-05 07:57:16,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:16,505 INFO L225 Difference]: With dead ends: 5807 [2021-06-05 07:57:16,505 INFO L226 Difference]: Without dead ends: 1279 [2021-06-05 07:57:16,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:57:16,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-06-05 07:57:16,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1279. [2021-06-05 07:57:16,514 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) [2021-06-05 07:57:16,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 3273 transitions. [2021-06-05 07:57:16,515 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 3273 transitions. Word has length 85 [2021-06-05 07:57:16,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:16,515 INFO L482 AbstractCegarLoop]: Abstraction has 1279 states and 3273 transitions. [2021-06-05 07:57:16,515 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) [2021-06-05 07:57:16,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 3273 transitions. [2021-06-05 07:57:16,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 07:57:16,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:16,516 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] [2021-06-05 07:57:16,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:16,717 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:16,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:16,717 INFO L82 PathProgramCache]: Analyzing trace with hash -489817904, now seen corresponding path program 52 times [2021-06-05 07:57:16,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:16,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68792692] [2021-06-05 07:57:16,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:16,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:16,808 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 81 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:16,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:16,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68792692] [2021-06-05 07:57:16,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68792692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:16,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474445391] [2021-06-05 07:57:16,809 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 [2021-06-05 07:57:16,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:57:16,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:16,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:57:16,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:17,001 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:17,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474445391] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:57:17,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 07:57:17,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-06-05 07:57:17,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309713877] [2021-06-05 07:57:17,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:57:17,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:17,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:57:17,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:57:17,002 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) [2021-06-05 07:57:17,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:17,136 INFO L93 Difference]: Finished difference Result 2288 states and 5575 transitions. [2021-06-05 07:57:17,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 07:57:17,136 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 [2021-06-05 07:57:17,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:17,137 INFO L225 Difference]: With dead ends: 2288 [2021-06-05 07:57:17,137 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 07:57:17,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:57:17,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 07:57:17,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 07:57:17,137 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) [2021-06-05 07:57:17,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 07:57:17,137 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 85 [2021-06-05 07:57:17,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:17,137 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 07:57:17,138 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) [2021-06-05 07:57:17,138 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 07:57:17,138 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 07:57:17,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 07:57:17,363 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 07:57:17,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 07:57:17 BasicIcfg [2021-06-05 07:57:17,365 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 07:57:17,365 INFO L168 Benchmark]: Toolchain (without parser) took 48017.11 ms. Allocated memory was 346.0 MB in the beginning and 792.7 MB in the end (delta: 446.7 MB). Free memory was 309.2 MB in the beginning and 324.5 MB in the end (delta: -15.4 MB). Peak memory consumption was 433.0 MB. Max. memory is 16.0 GB. [2021-06-05 07:57:17,365 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 346.0 MB. Free memory was 327.0 MB in the beginning and 327.0 MB in the end (delta: 65.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 07:57:17,366 INFO L168 Benchmark]: CACSL2BoogieTranslator took 530.68 ms. Allocated memory is still 346.0 MB. Free memory was 309.0 MB in the beginning and 311.4 MB in the end (delta: -2.4 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.0 GB. [2021-06-05 07:57:17,366 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.17 ms. Allocated memory is still 346.0 MB. Free memory was 311.4 MB in the beginning and 308.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-06-05 07:57:17,366 INFO L168 Benchmark]: Boogie Preprocessor took 31.28 ms. Allocated memory is still 346.0 MB. Free memory was 308.8 MB in the beginning and 307.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 07:57:17,366 INFO L168 Benchmark]: RCFGBuilder took 367.65 ms. Allocated memory is still 346.0 MB. Free memory was 307.7 MB in the beginning and 285.2 MB in the end (delta: 22.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-06-05 07:57:17,366 INFO L168 Benchmark]: TraceAbstraction took 47031.14 ms. Allocated memory was 346.0 MB in the beginning and 792.7 MB in the end (delta: 446.7 MB). Free memory was 285.2 MB in the beginning and 324.5 MB in the end (delta: -39.3 MB). Peak memory consumption was 408.4 MB. Max. memory is 16.0 GB. [2021-06-05 07:57:17,366 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 346.0 MB. Free memory was 327.0 MB in the beginning and 327.0 MB in the end (delta: 65.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 530.68 ms. Allocated memory is still 346.0 MB. Free memory was 309.0 MB in the beginning and 311.4 MB in the end (delta: -2.4 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 51.17 ms. Allocated memory is still 346.0 MB. Free memory was 311.4 MB in the beginning and 308.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 31.28 ms. Allocated memory is still 346.0 MB. Free memory was 308.8 MB in the beginning and 307.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 367.65 ms. Allocated memory is still 346.0 MB. Free memory was 307.7 MB in the beginning and 285.2 MB in the end (delta: 22.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 47031.14 ms. Allocated memory was 346.0 MB in the beginning and 792.7 MB in the end (delta: 446.7 MB). Free memory was 285.2 MB in the beginning and 324.5 MB in the end (delta: -39.3 MB). Peak memory consumption was 408.4 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: 46943.9ms, OverallIterations: 63, TraceHistogramMax: 6, EmptinessCheckTime: 153.9ms, AutomataDifference: 15496.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 91.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6276 SDtfs, 24236 SDslu, 39721 SDs, 0 SdLazy, 6940 SolverSat, 2749 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3720.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5368 GetRequests, 3809 SyntacticMatches, 0 SemanticMatches, 1559 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8583 ImplicationChecksByTransitivity, 13860.2ms 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: 1931.2ms AutomataMinimizationTime, 63 MinimizatonAttempts, 30890 StatesRemovedByMinimization, 61 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 638.2ms SsaConstructionTime, 1467.4ms SatisfiabilityAnalysisTime, 12622.1ms 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...