/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 15:25:08,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 15:25:08,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 15:25:08,924 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-12 15:25:08,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-12 15:25:08,927 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-12 15:25:08,928 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-12 15:25:08,932 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-12 15:25:08,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-12 15:25:08,937 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-12 15:25:08,938 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-12 15:25:08,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-06-12 15:25:08,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-12 15:25:08,989 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-12 15:25:08,990 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-12 15:25:08,990 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 15:25:09,015 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 15:25:09,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 15:25:09,015 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 15:25:09,015 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 15:25:09,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 15:25:09,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 15:25:09,016 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 15:25:09,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 15:25:09,016 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 15:25:09,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 15:25:09,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 15:25:09,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 15:25:09,017 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 15:25:09,017 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 15:25:09,017 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 15:25:09,017 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 15:25:09,017 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 15:25:09,017 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 15:25:09,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 15:25:09,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 15:25:09,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 15:25:09,018 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 15:25:09,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 15:25:09,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 15:25:09,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 15:25:09,018 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 15:25:09,018 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 15:25:09,018 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 15:25:09,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 15:25:09,019 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 15:25:09,019 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 15:25:09,019 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 15:25:09,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 15:25:09,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 15:25:09,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 15:25:09,276 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-12 15:25:09,277 INFO L275 PluginConnector]: CDTParser initialized [2021-06-12 15:25:09,277 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2021-06-12 15:25:09,329 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/966959072/cca7f547635647c6acadd066fd02b1b9/FLAGa9e8b68b8 [2021-06-12 15:25:09,729 INFO L306 CDTParser]: Found 1 translation units. [2021-06-12 15:25:09,729 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i [2021-06-12 15:25:09,739 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/966959072/cca7f547635647c6acadd066fd02b1b9/FLAGa9e8b68b8 [2021-06-12 15:25:09,748 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/966959072/cca7f547635647c6acadd066fd02b1b9 [2021-06-12 15:25:09,749 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 15:25:09,750 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-12 15:25:09,757 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-12 15:25:09,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-12 15:25:09,760 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-12 15:25:09,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.06 03:25:09" (1/1) ... [2021-06-12 15:25:09,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d1223c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:09, skipping insertion in model container [2021-06-12 15:25:09,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.06 03:25:09" (1/1) ... [2021-06-12 15:25:09,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-12 15:25:09,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-12 15:25:10,070 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-2.i[30952,30965] [2021-06-12 15:25:10,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-12 15:25:10,081 INFO L203 MainTranslator]: Completed pre-run [2021-06-12 15:25:10,116 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-2.i[30952,30965] [2021-06-12 15:25:10,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-12 15:25:10,165 INFO L208 MainTranslator]: Completed translation [2021-06-12 15:25:10,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:10 WrapperNode [2021-06-12 15:25:10,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-12 15:25:10,167 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 15:25:10,167 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 15:25:10,167 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 15:25:10,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:10" (1/1) ... [2021-06-12 15:25:10,193 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:10" (1/1) ... [2021-06-12 15:25:10,205 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 15:25:10,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 15:25:10,205 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 15:25:10,205 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 15:25:10,211 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:10" (1/1) ... [2021-06-12 15:25:10,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:10" (1/1) ... [2021-06-12 15:25:10,216 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:10" (1/1) ... [2021-06-12 15:25:10,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:10" (1/1) ... [2021-06-12 15:25:10,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:10" (1/1) ... [2021-06-12 15:25:10,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:10" (1/1) ... [2021-06-12 15:25:10,233 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:10" (1/1) ... [2021-06-12 15:25:10,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 15:25:10,235 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 15:25:10,235 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 15:25:10,235 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 15:25:10,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:10" (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 [2021-06-12 15:25:10,284 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-12 15:25:10,285 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-12 15:25:10,285 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-12 15:25:10,285 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-12 15:25:10,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-12 15:25:10,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-12 15:25:10,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-12 15:25:10,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-12 15:25:10,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-12 15:25:10,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-12 15:25:10,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 15:25:10,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 15:25:10,288 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 15:25:10,541 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 15:25:10,542 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-12 15:25:10,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 03:25:10 BoogieIcfgContainer [2021-06-12 15:25:10,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 15:25:10,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 15:25:10,544 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 15:25:10,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 15:25:10,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.06 03:25:09" (1/3) ... [2021-06-12 15:25:10,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@128c5fdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 03:25:10, skipping insertion in model container [2021-06-12 15:25:10,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:10" (2/3) ... [2021-06-12 15:25:10,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@128c5fdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 03:25:10, skipping insertion in model container [2021-06-12 15:25:10,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 03:25:10" (3/3) ... [2021-06-12 15:25:10,548 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2021-06-12 15:25:10,551 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 15:25:10,552 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 15:25:10,552 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 15:25:10,552 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 15:25:10,567 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,568 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,568 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,568 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,568 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,568 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,568 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,568 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,568 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,568 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,569 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,569 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,569 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,569 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,569 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,569 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,569 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,569 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,570 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,570 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,570 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,570 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,570 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,570 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,570 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,570 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,570 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,570 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,571 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,571 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,571 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,571 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,571 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,571 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,571 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,571 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,571 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,572 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,572 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,572 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,572 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,572 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,572 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,573 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,573 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,573 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,573 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,573 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,573 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,574 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,574 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,574 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,574 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,574 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,575 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,576 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,577 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,577 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,578 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,578 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,578 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,578 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,587 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,587 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,587 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,587 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,587 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,588 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:10,590 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-12 15:25:10,603 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 15:25:10,614 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 15:25:10,615 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 15:25:10,615 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 15:25:10,615 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 15:25:10,615 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 15:25:10,615 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 15:25:10,615 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 15:25:10,615 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 15:25:10,621 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-06-12 15:25:10,674 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) [2021-06-12 15:25:10,679 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) [2021-06-12 15:25:10,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 15:25:10,686 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:10,687 INFO L472 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] [2021-06-12 15:25:10,687 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:10,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:10,691 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-06-12 15:25:10,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:10,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004667115] [2021-06-12 15:25:10,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:10,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:10,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:10,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004667115] [2021-06-12 15:25:10,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004667115] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:25:10,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:25:10,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 15:25:10,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099870005] [2021-06-12 15:25:10,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 15:25:10,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:10,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 15:25:10,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-12 15:25:10,987 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) [2021-06-12 15:25:11,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:11,161 INFO L93 Difference]: Finished difference Result 3294 states and 9568 transitions. [2021-06-12 15:25:11,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 15:25:11,162 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 [2021-06-12 15:25:11,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:11,175 INFO L225 Difference]: With dead ends: 3294 [2021-06-12 15:25:11,175 INFO L226 Difference]: Without dead ends: 1248 [2021-06-12 15:25:11,176 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 15:25:11,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-12 15:25:11,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 800. [2021-06-12 15:25:11,239 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) [2021-06-12 15:25:11,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-06-12 15:25:11,242 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 32 [2021-06-12 15:25:11,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:11,243 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-06-12 15:25:11,243 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) [2021-06-12 15:25:11,243 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-06-12 15:25:11,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 15:25:11,245 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:11,245 INFO L472 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] [2021-06-12 15:25:11,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 15:25:11,246 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:11,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:11,246 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-06-12 15:25:11,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:11,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455401903] [2021-06-12 15:25:11,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:11,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:11,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:11,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:11,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455401903] [2021-06-12 15:25:11,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455401903] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:25:11,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:25:11,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 15:25:11,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061008399] [2021-06-12 15:25:11,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 15:25:11,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:11,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 15:25:11,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 15:25:11,337 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) [2021-06-12 15:25:11,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:11,423 INFO L93 Difference]: Finished difference Result 1302 states and 3436 transitions. [2021-06-12 15:25:11,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 15:25:11,423 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 [2021-06-12 15:25:11,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:11,429 INFO L225 Difference]: With dead ends: 1302 [2021-06-12 15:25:11,429 INFO L226 Difference]: Without dead ends: 920 [2021-06-12 15:25:11,430 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:25:11,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-06-12 15:25:11,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-06-12 15:25:11,454 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) [2021-06-12 15:25:11,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-06-12 15:25:11,457 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-06-12 15:25:11,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:11,458 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-06-12 15:25:11,458 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) [2021-06-12 15:25:11,458 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-06-12 15:25:11,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 15:25:11,464 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:11,464 INFO L472 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] [2021-06-12 15:25:11,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 15:25:11,464 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:11,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:11,465 INFO L82 PathProgramCache]: Analyzing trace with hash 93608864, now seen corresponding path program 1 times [2021-06-12 15:25:11,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:11,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539900891] [2021-06-12 15:25:11,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:11,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:11,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:11,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:11,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539900891] [2021-06-12 15:25:11,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539900891] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:25:11,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:25:11,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 15:25:11,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071063849] [2021-06-12 15:25:11,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 15:25:11,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:11,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 15:25:11,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-12 15:25:11,545 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) [2021-06-12 15:25:11,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:11,700 INFO L93 Difference]: Finished difference Result 1304 states and 3456 transitions. [2021-06-12 15:25:11,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 15:25:11,700 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 [2021-06-12 15:25:11,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:11,704 INFO L225 Difference]: With dead ends: 1304 [2021-06-12 15:25:11,704 INFO L226 Difference]: Without dead ends: 1044 [2021-06-12 15:25:11,705 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:25:11,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-06-12 15:25:11,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 876. [2021-06-12 15:25:11,722 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) [2021-06-12 15:25:11,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-06-12 15:25:11,725 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-06-12 15:25:11,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:11,725 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-06-12 15:25:11,725 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) [2021-06-12 15:25:11,725 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-06-12 15:25:11,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 15:25:11,728 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:11,728 INFO L472 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] [2021-06-12 15:25:11,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 15:25:11,728 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:11,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:11,729 INFO L82 PathProgramCache]: Analyzing trace with hash -466628886, now seen corresponding path program 2 times [2021-06-12 15:25:11,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:11,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942341194] [2021-06-12 15:25:11,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:11,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:11,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:11,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942341194] [2021-06-12 15:25:11,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942341194] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:25:11,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:25:11,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 15:25:11,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12362870] [2021-06-12 15:25:11,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 15:25:11,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:11,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 15:25:11,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 15:25:11,878 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) [2021-06-12 15:25:11,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:11,981 INFO L93 Difference]: Finished difference Result 1772 states and 4744 transitions. [2021-06-12 15:25:11,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 15:25:11,981 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 [2021-06-12 15:25:11,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:11,987 INFO L225 Difference]: With dead ends: 1772 [2021-06-12 15:25:11,987 INFO L226 Difference]: Without dead ends: 1505 [2021-06-12 15:25:11,987 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:25:11,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-06-12 15:25:12,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 975. [2021-06-12 15:25:12,006 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) [2021-06-12 15:25:12,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2628 transitions. [2021-06-12 15:25:12,009 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2628 transitions. Word has length 40 [2021-06-12 15:25:12,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:12,010 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 2628 transitions. [2021-06-12 15:25:12,010 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) [2021-06-12 15:25:12,010 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2628 transitions. [2021-06-12 15:25:12,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 15:25:12,011 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:12,011 INFO L472 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] [2021-06-12 15:25:12,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 15:25:12,011 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:12,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:12,012 INFO L82 PathProgramCache]: Analyzing trace with hash -78750066, now seen corresponding path program 3 times [2021-06-12 15:25:12,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:12,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239129289] [2021-06-12 15:25:12,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:12,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:12,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:12,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:12,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239129289] [2021-06-12 15:25:12,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239129289] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:25:12,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:25:12,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 15:25:12,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928335416] [2021-06-12 15:25:12,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 15:25:12,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:12,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 15:25:12,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-12 15:25:12,099 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) [2021-06-12 15:25:12,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:12,212 INFO L93 Difference]: Finished difference Result 2211 states and 5878 transitions. [2021-06-12 15:25:12,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 15:25:12,213 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 [2021-06-12 15:25:12,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:12,219 INFO L225 Difference]: With dead ends: 2211 [2021-06-12 15:25:12,219 INFO L226 Difference]: Without dead ends: 1944 [2021-06-12 15:25:12,220 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:25:12,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-06-12 15:25:12,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1127. [2021-06-12 15:25:12,246 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) [2021-06-12 15:25:12,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3119 transitions. [2021-06-12 15:25:12,249 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3119 transitions. Word has length 40 [2021-06-12 15:25:12,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:12,249 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 3119 transitions. [2021-06-12 15:25:12,249 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) [2021-06-12 15:25:12,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3119 transitions. [2021-06-12 15:25:12,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 15:25:12,250 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:12,250 INFO L472 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] [2021-06-12 15:25:12,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 15:25:12,251 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:12,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:12,251 INFO L82 PathProgramCache]: Analyzing trace with hash -56406816, now seen corresponding path program 4 times [2021-06-12 15:25:12,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:12,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475938248] [2021-06-12 15:25:12,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:12,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:12,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:12,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475938248] [2021-06-12 15:25:12,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475938248] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:25:12,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:25:12,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 15:25:12,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116723012] [2021-06-12 15:25:12,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 15:25:12,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:12,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 15:25:12,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-12 15:25:12,341 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) [2021-06-12 15:25:12,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:12,442 INFO L93 Difference]: Finished difference Result 1519 states and 4031 transitions. [2021-06-12 15:25:12,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 15:25:12,443 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 [2021-06-12 15:25:12,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:12,446 INFO L225 Difference]: With dead ends: 1519 [2021-06-12 15:25:12,446 INFO L226 Difference]: Without dead ends: 1138 [2021-06-12 15:25:12,447 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:25:12,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-06-12 15:25:12,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1033. [2021-06-12 15:25:12,460 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) [2021-06-12 15:25:12,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2823 transitions. [2021-06-12 15:25:12,462 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2823 transitions. Word has length 40 [2021-06-12 15:25:12,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:12,462 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 2823 transitions. [2021-06-12 15:25:12,463 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) [2021-06-12 15:25:12,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2823 transitions. [2021-06-12 15:25:12,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 15:25:12,464 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:12,464 INFO L472 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] [2021-06-12 15:25:12,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-12 15:25:12,464 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:12,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:12,464 INFO L82 PathProgramCache]: Analyzing trace with hash -709715269, now seen corresponding path program 1 times [2021-06-12 15:25:12,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:12,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163451691] [2021-06-12 15:25:12,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:12,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:12,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163451691] [2021-06-12 15:25:12,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163451691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:12,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276759221] [2021-06-12 15:25:12,549 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 [2021-06-12 15:25:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:12,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 15:25:12,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:12,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276759221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:12,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:12,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 15:25:12,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303540640] [2021-06-12 15:25:12,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 15:25:12,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:12,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 15:25:12,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:25:12,825 INFO L87 Difference]: Start difference. First operand 1033 states and 2823 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:12,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:12,946 INFO L93 Difference]: Finished difference Result 1451 states and 3787 transitions. [2021-06-12 15:25:12,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 15:25:12,946 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have 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 [2021-06-12 15:25:12,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:12,950 INFO L225 Difference]: With dead ends: 1451 [2021-06-12 15:25:12,951 INFO L226 Difference]: Without dead ends: 1181 [2021-06-12 15:25:12,951 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:25:12,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-06-12 15:25:12,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1083. [2021-06-12 15:25:12,974 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) [2021-06-12 15:25:12,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 2928 transitions. [2021-06-12 15:25:12,977 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 2928 transitions. Word has length 45 [2021-06-12 15:25:12,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:12,978 INFO L482 AbstractCegarLoop]: Abstraction has 1083 states and 2928 transitions. [2021-06-12 15:25:12,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:12,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 2928 transitions. [2021-06-12 15:25:12,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 15:25:12,979 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:12,979 INFO L472 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] [2021-06-12 15:25:13,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-12 15:25:13,193 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:13,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:13,193 INFO L82 PathProgramCache]: Analyzing trace with hash -321836449, now seen corresponding path program 2 times [2021-06-12 15:25:13,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:13,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262675174] [2021-06-12 15:25:13,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:13,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:13,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262675174] [2021-06-12 15:25:13,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262675174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:13,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171538292] [2021-06-12 15:25:13,244 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 [2021-06-12 15:25:13,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:25:13,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:13,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 15:25:13,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:13,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:13,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171538292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:13,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:13,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-12 15:25:13,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737698037] [2021-06-12 15:25:13,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 15:25:13,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:13,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 15:25:13,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-12 15:25:13,402 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) [2021-06-12 15:25:13,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:13,551 INFO L93 Difference]: Finished difference Result 2333 states and 6191 transitions. [2021-06-12 15:25:13,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 15:25:13,552 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 [2021-06-12 15:25:13,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:13,558 INFO L225 Difference]: With dead ends: 2333 [2021-06-12 15:25:13,558 INFO L226 Difference]: Without dead ends: 2063 [2021-06-12 15:25:13,559 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:25:13,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-06-12 15:25:13,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1218. [2021-06-12 15:25:13,583 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) [2021-06-12 15:25:13,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 3367 transitions. [2021-06-12 15:25:13,585 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 3367 transitions. Word has length 45 [2021-06-12 15:25:13,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:13,585 INFO L482 AbstractCegarLoop]: Abstraction has 1218 states and 3367 transitions. [2021-06-12 15:25:13,586 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) [2021-06-12 15:25:13,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 3367 transitions. [2021-06-12 15:25:13,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 15:25:13,587 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:13,587 INFO L472 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] [2021-06-12 15:25:13,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:13,806 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:13,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:13,806 INFO L82 PathProgramCache]: Analyzing trace with hash -299493199, now seen corresponding path program 3 times [2021-06-12 15:25:13,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:13,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560530231] [2021-06-12 15:25:13,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:13,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:13,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:13,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560530231] [2021-06-12 15:25:13,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560530231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:13,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808855569] [2021-06-12 15:25:13,867 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 [2021-06-12 15:25:13,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 15:25:13,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:13,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 15:25:13,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:14,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:14,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808855569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:14,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:14,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 15:25:14,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603384292] [2021-06-12 15:25:14,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 15:25:14,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:14,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 15:25:14,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:25:14,015 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) [2021-06-12 15:25:14,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:14,246 INFO L93 Difference]: Finished difference Result 2121 states and 5621 transitions. [2021-06-12 15:25:14,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 15:25:14,247 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 [2021-06-12 15:25:14,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:14,252 INFO L225 Difference]: With dead ends: 2121 [2021-06-12 15:25:14,252 INFO L226 Difference]: Without dead ends: 1546 [2021-06-12 15:25:14,252 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 172.0ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:25:14,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2021-06-12 15:25:14,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1253. [2021-06-12 15:25:14,271 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) [2021-06-12 15:25:14,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 3458 transitions. [2021-06-12 15:25:14,273 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 3458 transitions. Word has length 45 [2021-06-12 15:25:14,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:14,273 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 3458 transitions. [2021-06-12 15:25:14,273 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) [2021-06-12 15:25:14,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 3458 transitions. [2021-06-12 15:25:14,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 15:25:14,274 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:14,275 INFO L472 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] [2021-06-12 15:25:14,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:14,501 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:14,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:14,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1574579510, now seen corresponding path program 1 times [2021-06-12 15:25:14,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:14,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112137568] [2021-06-12 15:25:14,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:14,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:14,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112137568] [2021-06-12 15:25:14,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112137568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:14,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883042984] [2021-06-12 15:25:14,585 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 [2021-06-12 15:25:14,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:14,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 15:25:14,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:14,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883042984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:14,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:14,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 15:25:14,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170495624] [2021-06-12 15:25:14,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 15:25:14,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:14,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 15:25:14,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:25:14,729 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) [2021-06-12 15:25:14,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:14,846 INFO L93 Difference]: Finished difference Result 2398 states and 6444 transitions. [2021-06-12 15:25:14,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 15:25:14,846 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 [2021-06-12 15:25:14,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:14,852 INFO L225 Difference]: With dead ends: 2398 [2021-06-12 15:25:14,852 INFO L226 Difference]: Without dead ends: 1926 [2021-06-12 15:25:14,853 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:25:14,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-06-12 15:25:14,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1456. [2021-06-12 15:25:14,875 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) [2021-06-12 15:25:14,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 3969 transitions. [2021-06-12 15:25:14,878 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 3969 transitions. Word has length 45 [2021-06-12 15:25:14,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:14,878 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 3969 transitions. [2021-06-12 15:25:14,878 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) [2021-06-12 15:25:14,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 3969 transitions. [2021-06-12 15:25:14,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:25:14,880 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:14,880 INFO L472 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] [2021-06-12 15:25:15,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:15,097 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:15,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:15,098 INFO L82 PathProgramCache]: Analyzing trace with hash -767959508, now seen corresponding path program 1 times [2021-06-12 15:25:15,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:15,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230992223] [2021-06-12 15:25:15,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:15,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:15,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:15,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230992223] [2021-06-12 15:25:15,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230992223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:15,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305482272] [2021-06-12 15:25:15,211 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 [2021-06-12 15:25:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:15,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:25:15,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:15,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305482272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:15,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:15,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-12 15:25:15,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162846621] [2021-06-12 15:25:15,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:25:15,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:15,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:25:15,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:25:15,391 INFO L87 Difference]: Start difference. First operand 1456 states and 3969 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:15,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:15,537 INFO L93 Difference]: Finished difference Result 1866 states and 4917 transitions. [2021-06-12 15:25:15,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 15:25:15,537 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 [2021-06-12 15:25:15,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:15,548 INFO L225 Difference]: With dead ends: 1866 [2021-06-12 15:25:15,549 INFO L226 Difference]: Without dead ends: 1596 [2021-06-12 15:25:15,549 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:25:15,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-06-12 15:25:15,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1531. [2021-06-12 15:25:15,575 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) [2021-06-12 15:25:15,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4119 transitions. [2021-06-12 15:25:15,578 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4119 transitions. Word has length 55 [2021-06-12 15:25:15,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:15,578 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4119 transitions. [2021-06-12 15:25:15,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:15,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4119 transitions. [2021-06-12 15:25:15,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:25:15,582 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:15,582 INFO L472 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] [2021-06-12 15:25:15,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-12 15:25:15,797 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:15,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:15,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1043607760, now seen corresponding path program 2 times [2021-06-12 15:25:15,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:15,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914522726] [2021-06-12 15:25:15,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:15,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:15,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914522726] [2021-06-12 15:25:15,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914522726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:15,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954192080] [2021-06-12 15:25:15,861 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 [2021-06-12 15:25:15,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:25:15,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:15,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:25:15,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:16,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954192080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:16,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:16,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-12 15:25:16,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417232020] [2021-06-12 15:25:16,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 15:25:16,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:16,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 15:25:16,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 15:25:16,067 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) [2021-06-12 15:25:16,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:16,219 INFO L93 Difference]: Finished difference Result 1981 states and 5147 transitions. [2021-06-12 15:25:16,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 15:25:16,220 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 [2021-06-12 15:25:16,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:16,224 INFO L225 Difference]: With dead ends: 1981 [2021-06-12 15:25:16,225 INFO L226 Difference]: Without dead ends: 1711 [2021-06-12 15:25:16,225 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:25:16,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2021-06-12 15:25:16,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1531. [2021-06-12 15:25:16,247 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) [2021-06-12 15:25:16,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4119 transitions. [2021-06-12 15:25:16,250 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4119 transitions. Word has length 55 [2021-06-12 15:25:16,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:16,250 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4119 transitions. [2021-06-12 15:25:16,250 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) [2021-06-12 15:25:16,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4119 transitions. [2021-06-12 15:25:16,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:25:16,252 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:16,252 INFO L472 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] [2021-06-12 15:25:16,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:16,469 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:16,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:16,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1473361344, now seen corresponding path program 3 times [2021-06-12 15:25:16,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:16,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391489244] [2021-06-12 15:25:16,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:16,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:16,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391489244] [2021-06-12 15:25:16,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391489244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:16,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279222264] [2021-06-12 15:25:16,534 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 [2021-06-12 15:25:16,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 15:25:16,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:16,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:25:16,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:16,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279222264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:16,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:16,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-12 15:25:16,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712092973] [2021-06-12 15:25:16,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:25:16,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:16,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:25:16,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:25:16,707 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) [2021-06-12 15:25:16,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:16,953 INFO L93 Difference]: Finished difference Result 2669 states and 6993 transitions. [2021-06-12 15:25:16,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:25:16,959 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 [2021-06-12 15:25:16,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:16,969 INFO L225 Difference]: With dead ends: 2669 [2021-06-12 15:25:16,970 INFO L226 Difference]: Without dead ends: 2046 [2021-06-12 15:25:16,970 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 221.7ms TimeCoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:25:16,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-06-12 15:25:16,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1561. [2021-06-12 15:25:16,994 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) [2021-06-12 15:25:16,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 4244 transitions. [2021-06-12 15:25:16,997 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 4244 transitions. Word has length 55 [2021-06-12 15:25:16,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:16,997 INFO L482 AbstractCegarLoop]: Abstraction has 1561 states and 4244 transitions. [2021-06-12 15:25:16,997 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) [2021-06-12 15:25:16,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 4244 transitions. [2021-06-12 15:25:16,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:25:16,999 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:16,999 INFO L472 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] [2021-06-12 15:25:17,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-12 15:25:17,213 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:17,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:17,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1415627214, now seen corresponding path program 4 times [2021-06-12 15:25:17,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:17,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421918900] [2021-06-12 15:25:17,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:17,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:17,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421918900] [2021-06-12 15:25:17,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421918900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:17,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008378981] [2021-06-12 15:25:17,290 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 [2021-06-12 15:25:17,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:25:17,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:17,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:25:17,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:17,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:17,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008378981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:17,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:17,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-12 15:25:17,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191880879] [2021-06-12 15:25:17,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 15:25:17,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:17,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 15:25:17,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 15:25:17,452 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) [2021-06-12 15:25:17,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:17,649 INFO L93 Difference]: Finished difference Result 2878 states and 7671 transitions. [2021-06-12 15:25:17,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 15:25:17,657 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 [2021-06-12 15:25:17,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:17,661 INFO L225 Difference]: With dead ends: 2878 [2021-06-12 15:25:17,661 INFO L226 Difference]: Without dead ends: 2608 [2021-06-12 15:25:17,661 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 153.6ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:25:17,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-06-12 15:25:17,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 1741. [2021-06-12 15:25:17,696 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) [2021-06-12 15:25:17,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 4803 transitions. [2021-06-12 15:25:17,699 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 4803 transitions. Word has length 55 [2021-06-12 15:25:17,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:17,699 INFO L482 AbstractCegarLoop]: Abstraction has 1741 states and 4803 transitions. [2021-06-12 15:25:17,699 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) [2021-06-12 15:25:17,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 4803 transitions. [2021-06-12 15:25:17,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:25:17,701 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:17,701 INFO L472 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] [2021-06-12 15:25:17,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 15:25:17,917 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:17,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:17,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1437970464, now seen corresponding path program 5 times [2021-06-12 15:25:17,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:17,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551611724] [2021-06-12 15:25:17,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:17,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:17,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551611724] [2021-06-12 15:25:17,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551611724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:17,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103896708] [2021-06-12 15:25:17,976 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 [2021-06-12 15:25:18,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 15:25:18,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:18,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:25:18,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:18,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103896708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:18,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:18,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-12 15:25:18,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166361588] [2021-06-12 15:25:18,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:25:18,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:18,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:25:18,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:25:18,136 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) [2021-06-12 15:25:18,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:18,408 INFO L93 Difference]: Finished difference Result 2821 states and 7531 transitions. [2021-06-12 15:25:18,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 15:25:18,409 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 [2021-06-12 15:25:18,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:18,412 INFO L225 Difference]: With dead ends: 2821 [2021-06-12 15:25:18,412 INFO L226 Difference]: Without dead ends: 2246 [2021-06-12 15:25:18,413 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 234.3ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:25:18,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-06-12 15:25:18,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 1656. [2021-06-12 15:25:18,435 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) [2021-06-12 15:25:18,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 4519 transitions. [2021-06-12 15:25:18,438 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 4519 transitions. Word has length 55 [2021-06-12 15:25:18,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:18,438 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 4519 transitions. [2021-06-12 15:25:18,438 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) [2021-06-12 15:25:18,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 4519 transitions. [2021-06-12 15:25:18,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:25:18,440 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:18,440 INFO L472 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] [2021-06-12 15:25:18,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-12 15:25:18,645 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:18,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:18,645 INFO L82 PathProgramCache]: Analyzing trace with hash 978716506, now seen corresponding path program 6 times [2021-06-12 15:25:18,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:18,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203736498] [2021-06-12 15:25:18,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:18,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:18,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203736498] [2021-06-12 15:25:18,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203736498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:18,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357386323] [2021-06-12 15:25:18,721 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 [2021-06-12 15:25:18,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 15:25:18,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:18,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:25:18,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:18,923 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:18,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357386323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:18,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:18,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 15:25:18,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610228221] [2021-06-12 15:25:18,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:25:18,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:18,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:25:18,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:25:18,925 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) [2021-06-12 15:25:19,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:19,088 INFO L93 Difference]: Finished difference Result 2561 states and 6649 transitions. [2021-06-12 15:25:19,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 15:25:19,088 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 [2021-06-12 15:25:19,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:19,091 INFO L225 Difference]: With dead ends: 2561 [2021-06-12 15:25:19,092 INFO L226 Difference]: Without dead ends: 2212 [2021-06-12 15:25:19,092 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 146.5ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:25:19,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-06-12 15:25:19,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1658. [2021-06-12 15:25:19,122 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) [2021-06-12 15:25:19,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 4523 transitions. [2021-06-12 15:25:19,126 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 4523 transitions. Word has length 55 [2021-06-12 15:25:19,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:19,127 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 4523 transitions. [2021-06-12 15:25:19,127 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) [2021-06-12 15:25:19,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 4523 transitions. [2021-06-12 15:25:19,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:25:19,131 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:19,131 INFO L472 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] [2021-06-12 15:25:19,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-12 15:25:19,341 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:19,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:19,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1071233846, now seen corresponding path program 7 times [2021-06-12 15:25:19,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:19,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343607005] [2021-06-12 15:25:19,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:19,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:19,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:19,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343607005] [2021-06-12 15:25:19,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343607005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:19,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114053946] [2021-06-12 15:25:19,411 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 [2021-06-12 15:25:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:19,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 15:25:19,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:19,561 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:19,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114053946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:19,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:19,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 15:25:19,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307991952] [2021-06-12 15:25:19,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 15:25:19,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:19,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 15:25:19,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:25:19,563 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) [2021-06-12 15:25:19,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:19,653 INFO L93 Difference]: Finished difference Result 2311 states and 5957 transitions. [2021-06-12 15:25:19,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 15:25:19,653 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 [2021-06-12 15:25:19,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:19,657 INFO L225 Difference]: With dead ends: 2311 [2021-06-12 15:25:19,657 INFO L226 Difference]: Without dead ends: 2026 [2021-06-12 15:25:19,657 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:25:19,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2021-06-12 15:25:19,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1638. [2021-06-12 15:25:19,679 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) [2021-06-12 15:25:19,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 4483 transitions. [2021-06-12 15:25:19,682 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 4483 transitions. Word has length 55 [2021-06-12 15:25:19,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:19,683 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 4483 transitions. [2021-06-12 15:25:19,683 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) [2021-06-12 15:25:19,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 4483 transitions. [2021-06-12 15:25:19,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:25:19,684 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:19,684 INFO L472 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] [2021-06-12 15:25:19,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 15:25:19,905 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:19,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:19,906 INFO L82 PathProgramCache]: Analyzing trace with hash 2040122438, now seen corresponding path program 8 times [2021-06-12 15:25:19,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:19,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776943698] [2021-06-12 15:25:19,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:19,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:19,954 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:19,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:19,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776943698] [2021-06-12 15:25:19,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776943698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:19,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897202821] [2021-06-12 15:25:19,955 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 [2021-06-12 15:25:20,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:25:20,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:20,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 15:25:20,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:20,110 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:20,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897202821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:20,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:20,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-12 15:25:20,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138672399] [2021-06-12 15:25:20,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 15:25:20,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:20,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 15:25:20,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-12 15:25:20,111 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) [2021-06-12 15:25:20,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:20,258 INFO L93 Difference]: Finished difference Result 2246 states and 5827 transitions. [2021-06-12 15:25:20,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 15:25:20,258 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 [2021-06-12 15:25:20,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:20,261 INFO L225 Difference]: With dead ends: 2246 [2021-06-12 15:25:20,261 INFO L226 Difference]: Without dead ends: 1961 [2021-06-12 15:25:20,262 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 129.8ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:25:20,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-06-12 15:25:20,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1613. [2021-06-12 15:25:20,282 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) [2021-06-12 15:25:20,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 4433 transitions. [2021-06-12 15:25:20,285 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 4433 transitions. Word has length 55 [2021-06-12 15:25:20,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:20,285 INFO L482 AbstractCegarLoop]: Abstraction has 1613 states and 4433 transitions. [2021-06-12 15:25:20,285 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) [2021-06-12 15:25:20,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 4433 transitions. [2021-06-12 15:25:20,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:25:20,287 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:20,287 INFO L472 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] [2021-06-12 15:25:20,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:20,504 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:20,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:20,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1871308552, now seen corresponding path program 9 times [2021-06-12 15:25:20,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:20,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95812126] [2021-06-12 15:25:20,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:20,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:20,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:20,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95812126] [2021-06-12 15:25:20,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95812126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:20,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536638507] [2021-06-12 15:25:20,564 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 [2021-06-12 15:25:20,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 15:25:20,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:20,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 15:25:20,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:20,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536638507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:20,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:20,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 15:25:20,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333435053] [2021-06-12 15:25:20,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 15:25:20,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:20,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 15:25:20,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:25:20,744 INFO L87 Difference]: Start difference. First operand 1613 states and 4433 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) [2021-06-12 15:25:20,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:20,868 INFO L93 Difference]: Finished difference Result 3193 states and 8511 transitions. [2021-06-12 15:25:20,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 15:25:20,869 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 [2021-06-12 15:25:20,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:20,873 INFO L225 Difference]: With dead ends: 3193 [2021-06-12 15:25:20,873 INFO L226 Difference]: Without dead ends: 2893 [2021-06-12 15:25:20,873 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:25:20,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2021-06-12 15:25:20,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 1853. [2021-06-12 15:25:20,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1853 states, 1852 states have (on average 2.8115550755939527) internal successors, (5207), 1852 states have internal predecessors, (5207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:20,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1853 states to 1853 states and 5207 transitions. [2021-06-12 15:25:20,913 INFO L78 Accepts]: Start accepts. Automaton has 1853 states and 5207 transitions. Word has length 55 [2021-06-12 15:25:20,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:20,913 INFO L482 AbstractCegarLoop]: Abstraction has 1853 states and 5207 transitions. [2021-06-12 15:25:20,913 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) [2021-06-12 15:25:20,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1853 states and 5207 transitions. [2021-06-12 15:25:20,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:25:20,915 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:20,915 INFO L472 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] [2021-06-12 15:25:21,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-06-12 15:25:21,129 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:21,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:21,129 INFO L82 PathProgramCache]: Analyzing trace with hash -809510425, now seen corresponding path program 10 times [2021-06-12 15:25:21,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:21,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41030485] [2021-06-12 15:25:21,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:21,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:21,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:21,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:21,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41030485] [2021-06-12 15:25:21,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41030485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:21,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946580042] [2021-06-12 15:25:21,176 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 [2021-06-12 15:25:21,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:25:21,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:21,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:25:21,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:21,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946580042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:21,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:21,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-12 15:25:21,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371132431] [2021-06-12 15:25:21,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:25:21,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:21,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:25:21,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:25:21,355 INFO L87 Difference]: Start difference. First operand 1853 states and 5207 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) [2021-06-12 15:25:21,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:21,549 INFO L93 Difference]: Finished difference Result 3208 states and 8677 transitions. [2021-06-12 15:25:21,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:25:21,550 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 [2021-06-12 15:25:21,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:21,554 INFO L225 Difference]: With dead ends: 3208 [2021-06-12 15:25:21,554 INFO L226 Difference]: Without dead ends: 2426 [2021-06-12 15:25:21,554 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 175.4ms TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:25:21,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-06-12 15:25:21,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1856. [2021-06-12 15:25:21,574 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) [2021-06-12 15:25:21,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 5069 transitions. [2021-06-12 15:25:21,577 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 5069 transitions. Word has length 55 [2021-06-12 15:25:21,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:21,577 INFO L482 AbstractCegarLoop]: Abstraction has 1856 states and 5069 transitions. [2021-06-12 15:25:21,577 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) [2021-06-12 15:25:21,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 5069 transitions. [2021-06-12 15:25:21,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:25:21,579 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:21,579 INFO L472 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] [2021-06-12 15:25:21,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:21,793 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:21,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:21,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1514387363, now seen corresponding path program 11 times [2021-06-12 15:25:21,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:21,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722675740] [2021-06-12 15:25:21,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:21,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:21,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722675740] [2021-06-12 15:25:21,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722675740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:21,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943459493] [2021-06-12 15:25:21,943 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 [2021-06-12 15:25:22,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 15:25:22,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:22,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:25:22,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:22,182 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:22,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943459493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:22,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:22,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-12 15:25:22,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421040173] [2021-06-12 15:25:22,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:25:22,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:22,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:25:22,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:25:22,183 INFO L87 Difference]: Start difference. First operand 1856 states and 5069 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:22,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:22,351 INFO L93 Difference]: Finished difference Result 2316 states and 6117 transitions. [2021-06-12 15:25:22,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 15:25:22,352 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have 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 [2021-06-12 15:25:22,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:22,355 INFO L225 Difference]: With dead ends: 2316 [2021-06-12 15:25:22,355 INFO L226 Difference]: Without dead ends: 2046 [2021-06-12 15:25:22,355 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 204.3ms TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:25:22,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-06-12 15:25:22,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1931. [2021-06-12 15:25:22,375 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) [2021-06-12 15:25:22,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-06-12 15:25:22,378 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-06-12 15:25:22,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:22,378 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-06-12 15:25:22,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:22,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-06-12 15:25:22,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:25:22,380 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:22,380 INFO L472 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] [2021-06-12 15:25:22,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 15:25:22,597 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:22,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:22,597 INFO L82 PathProgramCache]: Analyzing trace with hash -2063950335, now seen corresponding path program 12 times [2021-06-12 15:25:22,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:22,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376409899] [2021-06-12 15:25:22,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:22,713 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:22,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:22,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376409899] [2021-06-12 15:25:22,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376409899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:22,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930952289] [2021-06-12 15:25:22,714 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 [2021-06-12 15:25:22,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 15:25:22,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:22,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:25:22,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:22,858 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:22,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930952289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:22,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:22,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 15:25:22,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889548248] [2021-06-12 15:25:22,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:25:22,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:22,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:25:22,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:25:22,860 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) [2021-06-12 15:25:23,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:23,058 INFO L93 Difference]: Finished difference Result 2481 states and 6447 transitions. [2021-06-12 15:25:23,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 15:25:23,058 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 [2021-06-12 15:25:23,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:23,062 INFO L225 Difference]: With dead ends: 2481 [2021-06-12 15:25:23,063 INFO L226 Difference]: Without dead ends: 2211 [2021-06-12 15:25:23,063 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 201.5ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:25:23,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-06-12 15:25:23,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 1931. [2021-06-12 15:25:23,086 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) [2021-06-12 15:25:23,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-06-12 15:25:23,089 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-06-12 15:25:23,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:23,089 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-06-12 15:25:23,089 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) [2021-06-12 15:25:23,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-06-12 15:25:23,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:25:23,091 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:23,091 INFO L472 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] [2021-06-12 15:25:23,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:23,307 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:23,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:23,308 INFO L82 PathProgramCache]: Analyzing trace with hash -2132101391, now seen corresponding path program 13 times [2021-06-12 15:25:23,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:23,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16670630] [2021-06-12 15:25:23,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:23,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:23,386 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:23,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:23,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16670630] [2021-06-12 15:25:23,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16670630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:23,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894676996] [2021-06-12 15:25:23,386 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 [2021-06-12 15:25:23,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:23,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:25:23,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:23,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894676996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:23,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:23,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-12 15:25:23,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288907749] [2021-06-12 15:25:23,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:25:23,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:23,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:25:23,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:25:23,557 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) [2021-06-12 15:25:23,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:23,750 INFO L93 Difference]: Finished difference Result 2566 states and 6617 transitions. [2021-06-12 15:25:23,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:25:23,750 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 [2021-06-12 15:25:23,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:23,753 INFO L225 Difference]: With dead ends: 2566 [2021-06-12 15:25:23,753 INFO L226 Difference]: Without dead ends: 2296 [2021-06-12 15:25:23,754 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 180.2ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:25:23,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-06-12 15:25:23,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1931. [2021-06-12 15:25:23,772 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) [2021-06-12 15:25:23,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-06-12 15:25:23,774 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-06-12 15:25:23,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:23,774 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-06-12 15:25:23,774 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) [2021-06-12 15:25:23,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-06-12 15:25:23,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:25:23,776 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:23,777 INFO L472 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] [2021-06-12 15:25:23,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-12 15:25:23,993 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:23,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:23,993 INFO L82 PathProgramCache]: Analyzing trace with hash 865896831, now seen corresponding path program 14 times [2021-06-12 15:25:23,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:23,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251810838] [2021-06-12 15:25:23,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:24,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:24,079 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:24,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:24,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251810838] [2021-06-12 15:25:24,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251810838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:24,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772725996] [2021-06-12 15:25:24,080 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 [2021-06-12 15:25:24,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:25:24,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:24,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:25:24,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:24,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772725996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:24,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:24,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 15:25:24,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250006287] [2021-06-12 15:25:24,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:25:24,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:24,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:25:24,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:25:24,238 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) [2021-06-12 15:25:24,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:24,427 INFO L93 Difference]: Finished difference Result 2496 states and 6477 transitions. [2021-06-12 15:25:24,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 15:25:24,428 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 [2021-06-12 15:25:24,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:24,431 INFO L225 Difference]: With dead ends: 2496 [2021-06-12 15:25:24,431 INFO L226 Difference]: Without dead ends: 2226 [2021-06-12 15:25:24,432 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 182.8ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:25:24,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-06-12 15:25:24,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1931. [2021-06-12 15:25:24,451 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) [2021-06-12 15:25:24,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-06-12 15:25:24,454 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-06-12 15:25:24,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:24,454 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-06-12 15:25:24,454 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) [2021-06-12 15:25:24,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-06-12 15:25:24,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:25:24,456 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:24,456 INFO L472 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] [2021-06-12 15:25:24,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-12 15:25:24,673 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:24,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:24,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1295650415, now seen corresponding path program 15 times [2021-06-12 15:25:24,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:24,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685605564] [2021-06-12 15:25:24,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:24,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:24,766 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:24,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:24,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685605564] [2021-06-12 15:25:24,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685605564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:24,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801269558] [2021-06-12 15:25:24,767 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 [2021-06-12 15:25:24,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 15:25:24,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:24,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:25:24,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:24,916 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:24,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801269558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:24,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:24,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-12 15:25:24,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826572341] [2021-06-12 15:25:24,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:25:24,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:24,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:25:24,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:25:24,918 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) [2021-06-12 15:25:25,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:25,210 INFO L93 Difference]: Finished difference Result 3074 states and 8103 transitions. [2021-06-12 15:25:25,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:25:25,216 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 [2021-06-12 15:25:25,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:25,220 INFO L225 Difference]: With dead ends: 3074 [2021-06-12 15:25:25,220 INFO L226 Difference]: Without dead ends: 2451 [2021-06-12 15:25:25,220 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 236.5ms TimeCoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:25:25,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-06-12 15:25:25,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1961. [2021-06-12 15:25:25,240 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) [2021-06-12 15:25:25,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 5344 transitions. [2021-06-12 15:25:25,242 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 5344 transitions. Word has length 65 [2021-06-12 15:25:25,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:25,242 INFO L482 AbstractCegarLoop]: Abstraction has 1961 states and 5344 transitions. [2021-06-12 15:25:25,242 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) [2021-06-12 15:25:25,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 5344 transitions. [2021-06-12 15:25:25,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:25:25,245 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:25,245 INFO L472 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] [2021-06-12 15:25:25,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 15:25:25,463 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:25,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:25,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1237916285, now seen corresponding path program 16 times [2021-06-12 15:25:25,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:25,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070820093] [2021-06-12 15:25:25,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:25,551 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:25,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:25,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070820093] [2021-06-12 15:25:25,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070820093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:25,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832200619] [2021-06-12 15:25:25,551 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 [2021-06-12 15:25:25,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:25:25,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:25,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:25:25,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:25,693 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:25,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832200619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:25,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:25,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 15:25:25,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431717007] [2021-06-12 15:25:25,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:25:25,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:25,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:25:25,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:25:25,694 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) [2021-06-12 15:25:25,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:25,916 INFO L93 Difference]: Finished difference Result 3278 states and 8771 transitions. [2021-06-12 15:25:25,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 15:25:25,917 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 [2021-06-12 15:25:25,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:25,927 INFO L225 Difference]: With dead ends: 3278 [2021-06-12 15:25:25,927 INFO L226 Difference]: Without dead ends: 3008 [2021-06-12 15:25:25,927 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 175.5ms TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:25:25,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-06-12 15:25:25,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 2141. [2021-06-12 15:25:25,967 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) [2021-06-12 15:25:25,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 5903 transitions. [2021-06-12 15:25:25,970 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 5903 transitions. Word has length 65 [2021-06-12 15:25:25,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:25,970 INFO L482 AbstractCegarLoop]: Abstraction has 2141 states and 5903 transitions. [2021-06-12 15:25:25,970 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) [2021-06-12 15:25:25,970 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 5903 transitions. [2021-06-12 15:25:25,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:25:25,972 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:25,973 INFO L472 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] [2021-06-12 15:25:26,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-12 15:25:26,189 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:26,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:26,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1260259535, now seen corresponding path program 17 times [2021-06-12 15:25:26,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:26,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110500613] [2021-06-12 15:25:26,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:26,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:26,250 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:26,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:26,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110500613] [2021-06-12 15:25:26,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110500613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:26,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536827882] [2021-06-12 15:25:26,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 15:25:26,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 15:25:26,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:26,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:25:26,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:26,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536827882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:26,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:26,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-12 15:25:26,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114845206] [2021-06-12 15:25:26,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:25:26,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:26,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:25:26,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:25:26,406 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) [2021-06-12 15:25:26,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:26,771 INFO L93 Difference]: Finished difference Result 3221 states and 8631 transitions. [2021-06-12 15:25:26,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:25:26,772 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 [2021-06-12 15:25:26,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:26,775 INFO L225 Difference]: With dead ends: 3221 [2021-06-12 15:25:26,775 INFO L226 Difference]: Without dead ends: 2646 [2021-06-12 15:25:26,775 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 287.0ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:25:26,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-06-12 15:25:26,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2056. [2021-06-12 15:25:26,797 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) [2021-06-12 15:25:26,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 5619 transitions. [2021-06-12 15:25:26,800 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 5619 transitions. Word has length 65 [2021-06-12 15:25:26,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:26,800 INFO L482 AbstractCegarLoop]: Abstraction has 2056 states and 5619 transitions. [2021-06-12 15:25:26,800 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) [2021-06-12 15:25:26,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 5619 transitions. [2021-06-12 15:25:26,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:25:26,802 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:26,802 INFO L472 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] [2021-06-12 15:25:27,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 15:25:27,019 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:27,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:27,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1366107511, now seen corresponding path program 18 times [2021-06-12 15:25:27,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:27,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258136723] [2021-06-12 15:25:27,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:27,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:27,100 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:27,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:27,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258136723] [2021-06-12 15:25:27,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258136723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:27,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519495863] [2021-06-12 15:25:27,100 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 [2021-06-12 15:25:27,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 15:25:27,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:27,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:25:27,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:27,292 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:27,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519495863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:27,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:27,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-12 15:25:27,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571712402] [2021-06-12 15:25:27,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:25:27,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:27,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:25:27,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:25:27,294 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) [2021-06-12 15:25:27,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:27,455 INFO L93 Difference]: Finished difference Result 3061 states and 7949 transitions. [2021-06-12 15:25:27,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 15:25:27,456 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 [2021-06-12 15:25:27,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:27,458 INFO L225 Difference]: With dead ends: 3061 [2021-06-12 15:25:27,458 INFO L226 Difference]: Without dead ends: 2712 [2021-06-12 15:25:27,459 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 166.1ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:25:27,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-06-12 15:25:27,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2058. [2021-06-12 15:25:27,481 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) [2021-06-12 15:25:27,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 5623 transitions. [2021-06-12 15:25:27,485 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 5623 transitions. Word has length 65 [2021-06-12 15:25:27,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:27,485 INFO L482 AbstractCegarLoop]: Abstraction has 2058 states and 5623 transitions. [2021-06-12 15:25:27,485 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) [2021-06-12 15:25:27,485 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 5623 transitions. [2021-06-12 15:25:27,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:25:27,487 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:27,487 INFO L472 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] [2021-06-12 15:25:27,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:27,701 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:27,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:27,701 INFO L82 PathProgramCache]: Analyzing trace with hash -908301467, now seen corresponding path program 19 times [2021-06-12 15:25:27,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:27,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542979558] [2021-06-12 15:25:27,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:27,788 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:27,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:27,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542979558] [2021-06-12 15:25:27,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542979558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:27,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740841483] [2021-06-12 15:25:27,788 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 [2021-06-12 15:25:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:27,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:25:27,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:27,927 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:27,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740841483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:27,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:27,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 15:25:27,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496966270] [2021-06-12 15:25:27,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:25:27,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:27,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:25:27,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:25:27,929 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) [2021-06-12 15:25:28,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:28,035 INFO L93 Difference]: Finished difference Result 2861 states and 7357 transitions. [2021-06-12 15:25:28,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 15:25:28,035 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 [2021-06-12 15:25:28,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:28,038 INFO L225 Difference]: With dead ends: 2861 [2021-06-12 15:25:28,038 INFO L226 Difference]: Without dead ends: 2576 [2021-06-12 15:25:28,039 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 119.9ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:25:28,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-06-12 15:25:28,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 2038. [2021-06-12 15:25:28,067 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) [2021-06-12 15:25:28,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2038 states to 2038 states and 5583 transitions. [2021-06-12 15:25:28,070 INFO L78 Accepts]: Start accepts. Automaton has 2038 states and 5583 transitions. Word has length 65 [2021-06-12 15:25:28,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:28,070 INFO L482 AbstractCegarLoop]: Abstraction has 2038 states and 5583 transitions. [2021-06-12 15:25:28,070 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) [2021-06-12 15:25:28,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states and 5583 transitions. [2021-06-12 15:25:28,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:25:28,073 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:28,073 INFO L472 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] [2021-06-12 15:25:28,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-12 15:25:28,281 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:28,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:28,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1371957365, now seen corresponding path program 20 times [2021-06-12 15:25:28,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:28,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686549593] [2021-06-12 15:25:28,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:28,352 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:28,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:28,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686549593] [2021-06-12 15:25:28,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686549593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:28,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856395700] [2021-06-12 15:25:28,353 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 [2021-06-12 15:25:28,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:25:28,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:28,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:25:28,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:28,558 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:28,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856395700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:28,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:28,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 15:25:28,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101342444] [2021-06-12 15:25:28,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:25:28,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:28,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:25:28,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:25:28,559 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) [2021-06-12 15:25:28,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:28,763 INFO L93 Difference]: Finished difference Result 2796 states and 7227 transitions. [2021-06-12 15:25:28,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 15:25:28,764 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 [2021-06-12 15:25:28,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:28,766 INFO L225 Difference]: With dead ends: 2796 [2021-06-12 15:25:28,766 INFO L226 Difference]: Without dead ends: 2511 [2021-06-12 15:25:28,767 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:25:28,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2021-06-12 15:25:28,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2013. [2021-06-12 15:25:28,786 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) [2021-06-12 15:25:28,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 5533 transitions. [2021-06-12 15:25:28,789 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 5533 transitions. Word has length 65 [2021-06-12 15:25:28,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:28,789 INFO L482 AbstractCegarLoop]: Abstraction has 2013 states and 5533 transitions. [2021-06-12 15:25:28,789 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) [2021-06-12 15:25:28,789 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 5533 transitions. [2021-06-12 15:25:28,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:25:28,791 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:28,791 INFO L472 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] [2021-06-12 15:25:28,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:28,991 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:28,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:28,992 INFO L82 PathProgramCache]: Analyzing trace with hash -239599961, now seen corresponding path program 21 times [2021-06-12 15:25:28,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:28,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053753848] [2021-06-12 15:25:28,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:29,047 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:29,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:29,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053753848] [2021-06-12 15:25:29,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053753848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:29,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473705513] [2021-06-12 15:25:29,048 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 [2021-06-12 15:25:29,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 15:25:29,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:29,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:25:29,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:29,231 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:29,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473705513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:29,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:29,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 15:25:29,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255574328] [2021-06-12 15:25:29,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:25:29,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:29,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:25:29,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:25:29,232 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) [2021-06-12 15:25:29,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:29,387 INFO L93 Difference]: Finished difference Result 2721 states and 7077 transitions. [2021-06-12 15:25:29,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 15:25:29,387 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 [2021-06-12 15:25:29,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:29,390 INFO L225 Difference]: With dead ends: 2721 [2021-06-12 15:25:29,390 INFO L226 Difference]: Without dead ends: 2436 [2021-06-12 15:25:29,390 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 139.0ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:25:29,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-06-12 15:25:29,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1988. [2021-06-12 15:25:29,410 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) [2021-06-12 15:25:29,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 5483 transitions. [2021-06-12 15:25:29,413 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 5483 transitions. Word has length 65 [2021-06-12 15:25:29,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:29,413 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 5483 transitions. [2021-06-12 15:25:29,413 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) [2021-06-12 15:25:29,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 5483 transitions. [2021-06-12 15:25:29,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:25:29,415 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:29,415 INFO L472 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] [2021-06-12 15:25:29,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-12 15:25:29,629 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:29,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:29,629 INFO L82 PathProgramCache]: Analyzing trace with hash 729288631, now seen corresponding path program 22 times [2021-06-12 15:25:29,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:29,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485917011] [2021-06-12 15:25:29,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:29,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:29,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:29,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485917011] [2021-06-12 15:25:29,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485917011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:29,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080921502] [2021-06-12 15:25:29,705 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 [2021-06-12 15:25:29,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:25:29,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:29,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:25:29,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:29,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080921502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:29,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:29,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 15:25:29,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786596504] [2021-06-12 15:25:29,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:25:29,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:29,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:25:29,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:25:29,878 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) [2021-06-12 15:25:30,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:30,094 INFO L93 Difference]: Finished difference Result 2646 states and 6927 transitions. [2021-06-12 15:25:30,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:25:30,094 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 [2021-06-12 15:25:30,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:30,096 INFO L225 Difference]: With dead ends: 2646 [2021-06-12 15:25:30,097 INFO L226 Difference]: Without dead ends: 2361 [2021-06-12 15:25:30,097 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 199.4ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:25:30,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-06-12 15:25:30,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 1963. [2021-06-12 15:25:30,116 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) [2021-06-12 15:25:30,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 5433 transitions. [2021-06-12 15:25:30,119 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 5433 transitions. Word has length 65 [2021-06-12 15:25:30,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:30,119 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 5433 transitions. [2021-06-12 15:25:30,119 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) [2021-06-12 15:25:30,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 5433 transitions. [2021-06-12 15:25:30,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:25:30,121 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:30,121 INFO L472 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] [2021-06-12 15:25:30,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-12 15:25:30,337 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:30,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:30,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1112824937, now seen corresponding path program 23 times [2021-06-12 15:25:30,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:30,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343073830] [2021-06-12 15:25:30,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:30,433 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:30,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:30,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343073830] [2021-06-12 15:25:30,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343073830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:30,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458845588] [2021-06-12 15:25:30,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 15:25:30,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 15:25:30,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:30,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:25:30,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:30,589 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:30,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458845588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:30,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:30,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 15:25:30,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248716640] [2021-06-12 15:25:30,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:25:30,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:30,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:25:30,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:25:30,590 INFO L87 Difference]: Start difference. First operand 1963 states and 5433 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) [2021-06-12 15:25:30,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:30,782 INFO L93 Difference]: Finished difference Result 3593 states and 9611 transitions. [2021-06-12 15:25:30,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 15:25:30,782 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 [2021-06-12 15:25:30,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:30,786 INFO L225 Difference]: With dead ends: 3593 [2021-06-12 15:25:30,786 INFO L226 Difference]: Without dead ends: 3293 [2021-06-12 15:25:30,786 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:25:30,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3293 states. [2021-06-12 15:25:30,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3293 to 2203. [2021-06-12 15:25:30,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2202 states have (on average 2.818801089918256) internal successors, (6207), 2202 states have internal predecessors, (6207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:30,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 6207 transitions. [2021-06-12 15:25:30,816 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 6207 transitions. Word has length 65 [2021-06-12 15:25:30,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:30,817 INFO L482 AbstractCegarLoop]: Abstraction has 2203 states and 6207 transitions. [2021-06-12 15:25:30,817 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) [2021-06-12 15:25:30,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 6207 transitions. [2021-06-12 15:25:30,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:25:30,819 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:30,819 INFO L472 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] [2021-06-12 15:25:31,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-12 15:25:31,019 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:31,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:31,020 INFO L82 PathProgramCache]: Analyzing trace with hash -2120344232, now seen corresponding path program 24 times [2021-06-12 15:25:31,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:31,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221915292] [2021-06-12 15:25:31,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:31,088 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:31,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:31,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221915292] [2021-06-12 15:25:31,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221915292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:31,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501134885] [2021-06-12 15:25:31,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 15:25:31,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 15:25:31,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:31,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:25:31,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:31,230 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:31,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501134885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:31,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:31,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-12 15:25:31,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927642240] [2021-06-12 15:25:31,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:25:31,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:31,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:25:31,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:25:31,231 INFO L87 Difference]: Start difference. First operand 2203 states and 6207 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) [2021-06-12 15:25:31,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:31,578 INFO L93 Difference]: Finished difference Result 3608 states and 9777 transitions. [2021-06-12 15:25:31,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 15:25:31,578 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 [2021-06-12 15:25:31,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:31,581 INFO L225 Difference]: With dead ends: 3608 [2021-06-12 15:25:31,582 INFO L226 Difference]: Without dead ends: 2826 [2021-06-12 15:25:31,582 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 281.1ms TimeCoverageRelationStatistics Valid=281, Invalid=841, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:25:31,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2021-06-12 15:25:31,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2256. [2021-06-12 15:25:31,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 2.73569844789357) internal successors, (6169), 2255 states have internal predecessors, (6169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:31,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 6169 transitions. [2021-06-12 15:25:31,612 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 6169 transitions. Word has length 65 [2021-06-12 15:25:31,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:31,613 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 6169 transitions. [2021-06-12 15:25:31,613 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) [2021-06-12 15:25:31,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 6169 transitions. [2021-06-12 15:25:31,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:25:31,615 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:31,615 INFO L472 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] [2021-06-12 15:25:31,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-12 15:25:31,832 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:31,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:31,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1333237426, now seen corresponding path program 25 times [2021-06-12 15:25:31,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:31,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374900666] [2021-06-12 15:25:31,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:31,936 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:31,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:31,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374900666] [2021-06-12 15:25:31,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374900666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:31,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357833098] [2021-06-12 15:25:31,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:31,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:25:31,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:32,107 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:32,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357833098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:32,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:32,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 15:25:32,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092835107] [2021-06-12 15:25:32,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:25:32,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:32,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:25:32,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:25:32,109 INFO L87 Difference]: Start difference. First operand 2256 states and 6169 transitions. Second operand has 15 states, 15 states have (on average 5.6) internal successors, (84), 15 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:32,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:32,300 INFO L93 Difference]: Finished difference Result 2766 states and 7317 transitions. [2021-06-12 15:25:32,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 15:25:32,300 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 15 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have 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 [2021-06-12 15:25:32,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:32,303 INFO L225 Difference]: With dead ends: 2766 [2021-06-12 15:25:32,303 INFO L226 Difference]: Without dead ends: 2496 [2021-06-12 15:25:32,303 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 186.9ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:25:32,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-06-12 15:25:32,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2331. [2021-06-12 15:25:32,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:32,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-06-12 15:25:32,328 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-06-12 15:25:32,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:32,328 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-06-12 15:25:32,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 15 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:32,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-06-12 15:25:32,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:25:32,331 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:32,331 INFO L472 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] [2021-06-12 15:25:32,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-12 15:25:32,539 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:32,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:32,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1814233586, now seen corresponding path program 26 times [2021-06-12 15:25:32,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:32,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389082981] [2021-06-12 15:25:32,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:32,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:32,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:32,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389082981] [2021-06-12 15:25:32,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389082981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:32,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259297381] [2021-06-12 15:25:32,667 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 [2021-06-12 15:25:32,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:25:32,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:32,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:25:32,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:32,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259297381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:32,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:32,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 15:25:32,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623417915] [2021-06-12 15:25:32,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:25:32,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:32,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:25:32,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:25:32,808 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:33,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:33,024 INFO L93 Difference]: Finished difference Result 2981 states and 7747 transitions. [2021-06-12 15:25:33,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:25:33,024 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 [2021-06-12 15:25:33,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:33,027 INFO L225 Difference]: With dead ends: 2981 [2021-06-12 15:25:33,027 INFO L226 Difference]: Without dead ends: 2711 [2021-06-12 15:25:33,027 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 235.0ms TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:25:33,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2021-06-12 15:25:33,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 2331. [2021-06-12 15:25:33,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:33,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-06-12 15:25:33,050 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-06-12 15:25:33,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:33,051 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-06-12 15:25:33,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:33,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-06-12 15:25:33,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:25:33,053 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:33,053 INFO L472 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] [2021-06-12 15:25:33,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:33,269 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:33,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:33,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1128050402, now seen corresponding path program 27 times [2021-06-12 15:25:33,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:33,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931321700] [2021-06-12 15:25:33,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:33,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:33,353 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:33,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:33,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931321700] [2021-06-12 15:25:33,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931321700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:33,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843452645] [2021-06-12 15:25:33,353 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 [2021-06-12 15:25:33,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 15:25:33,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:33,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:25:33,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:33,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843452645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:33,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:33,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 15:25:33,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188484644] [2021-06-12 15:25:33,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:25:33,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:33,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:25:33,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:25:33,518 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 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) [2021-06-12 15:25:33,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:33,772 INFO L93 Difference]: Finished difference Result 3116 states and 8017 transitions. [2021-06-12 15:25:33,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 15:25:33,773 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 [2021-06-12 15:25:33,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:33,775 INFO L225 Difference]: With dead ends: 3116 [2021-06-12 15:25:33,775 INFO L226 Difference]: Without dead ends: 2846 [2021-06-12 15:25:33,775 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 235.6ms TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:25:33,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-06-12 15:25:33,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 2331. [2021-06-12 15:25:33,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:33,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-06-12 15:25:33,802 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-06-12 15:25:33,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:33,803 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-06-12 15:25:33,803 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) [2021-06-12 15:25:33,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-06-12 15:25:33,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:25:33,806 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:33,806 INFO L472 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] [2021-06-12 15:25:34,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-12 15:25:34,021 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:34,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:34,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1043015664, now seen corresponding path program 28 times [2021-06-12 15:25:34,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:34,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192861036] [2021-06-12 15:25:34,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:34,112 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:34,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:34,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192861036] [2021-06-12 15:25:34,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192861036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:34,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188253525] [2021-06-12 15:25:34,112 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 [2021-06-12 15:25:34,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:25:34,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:34,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:25:34,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:34,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188253525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:34,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:34,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 15:25:34,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638671873] [2021-06-12 15:25:34,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:25:34,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:34,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:25:34,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:25:34,264 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:34,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:34,492 INFO L93 Difference]: Finished difference Result 3046 states and 7877 transitions. [2021-06-12 15:25:34,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 15:25:34,493 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 [2021-06-12 15:25:34,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:34,497 INFO L225 Difference]: With dead ends: 3046 [2021-06-12 15:25:34,497 INFO L226 Difference]: Without dead ends: 2776 [2021-06-12 15:25:34,497 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 208.0ms TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:25:34,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-06-12 15:25:34,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2331. [2021-06-12 15:25:34,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:34,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-06-12 15:25:34,539 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-06-12 15:25:34,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:34,539 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-06-12 15:25:34,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:34,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-06-12 15:25:34,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:25:34,541 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:34,541 INFO L472 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] [2021-06-12 15:25:34,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 15:25:34,758 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:34,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:34,758 INFO L82 PathProgramCache]: Analyzing trace with hash 974864608, now seen corresponding path program 29 times [2021-06-12 15:25:34,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:34,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470699572] [2021-06-12 15:25:34,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:34,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:34,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:34,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470699572] [2021-06-12 15:25:34,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470699572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:34,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781962964] [2021-06-12 15:25:34,854 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 [2021-06-12 15:25:34,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 15:25:34,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:34,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:25:34,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:35,069 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:35,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781962964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:35,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:35,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 15:25:35,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709017278] [2021-06-12 15:25:35,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:25:35,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:35,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:25:35,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:25:35,070 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 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) [2021-06-12 15:25:35,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:35,362 INFO L93 Difference]: Finished difference Result 2971 states and 7727 transitions. [2021-06-12 15:25:35,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:25:35,362 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 [2021-06-12 15:25:35,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:35,365 INFO L225 Difference]: With dead ends: 2971 [2021-06-12 15:25:35,365 INFO L226 Difference]: Without dead ends: 2701 [2021-06-12 15:25:35,365 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 252.5ms TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:25:35,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-06-12 15:25:35,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2331. [2021-06-12 15:25:35,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:35,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-06-12 15:25:35,405 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-06-12 15:25:35,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:35,405 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-06-12 15:25:35,409 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) [2021-06-12 15:25:35,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-06-12 15:25:35,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:25:35,412 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:35,412 INFO L472 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] [2021-06-12 15:25:35,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:35,625 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:35,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:35,625 INFO L82 PathProgramCache]: Analyzing trace with hash -322104466, now seen corresponding path program 30 times [2021-06-12 15:25:35,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:35,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101896719] [2021-06-12 15:25:35,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:35,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:35,700 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:35,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:35,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101896719] [2021-06-12 15:25:35,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101896719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:35,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780458891] [2021-06-12 15:25:35,701 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 [2021-06-12 15:25:35,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 15:25:35,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:35,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:25:35,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:35,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780458891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:35,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:35,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 15:25:35,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804800277] [2021-06-12 15:25:35,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:25:35,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:35,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:25:35,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:25:35,864 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:36,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:36,103 INFO L93 Difference]: Finished difference Result 2896 states and 7577 transitions. [2021-06-12 15:25:36,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 15:25:36,103 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 [2021-06-12 15:25:36,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:36,106 INFO L225 Difference]: With dead ends: 2896 [2021-06-12 15:25:36,106 INFO L226 Difference]: Without dead ends: 2626 [2021-06-12 15:25:36,106 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 210.6ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:25:36,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-06-12 15:25:36,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 2331. [2021-06-12 15:25:36,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:36,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-06-12 15:25:36,170 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-06-12 15:25:36,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:36,170 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-06-12 15:25:36,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:36,170 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-06-12 15:25:36,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:25:36,172 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:36,172 INFO L472 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] [2021-06-12 15:25:36,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-12 15:25:36,373 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:36,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:36,373 INFO L82 PathProgramCache]: Analyzing trace with hash 107649118, now seen corresponding path program 31 times [2021-06-12 15:25:36,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:36,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659844822] [2021-06-12 15:25:36,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:36,446 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:36,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:36,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659844822] [2021-06-12 15:25:36,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659844822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:36,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644603534] [2021-06-12 15:25:36,447 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 [2021-06-12 15:25:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:36,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:25:36,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:36,613 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:36,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644603534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:36,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:36,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 15:25:36,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756279017] [2021-06-12 15:25:36,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:25:36,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:36,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:25:36,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:25:36,615 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 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) [2021-06-12 15:25:36,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:36,990 INFO L93 Difference]: Finished difference Result 3474 states and 9203 transitions. [2021-06-12 15:25:36,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:25:36,990 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 [2021-06-12 15:25:36,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:36,994 INFO L225 Difference]: With dead ends: 3474 [2021-06-12 15:25:36,994 INFO L226 Difference]: Without dead ends: 2851 [2021-06-12 15:25:36,994 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 305.2ms TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:25:36,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-06-12 15:25:37,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2361. [2021-06-12 15:25:37,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2360 states have (on average 2.730508474576271) internal successors, (6444), 2360 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:37,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 6444 transitions. [2021-06-12 15:25:37,021 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 6444 transitions. Word has length 75 [2021-06-12 15:25:37,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:37,022 INFO L482 AbstractCegarLoop]: Abstraction has 2361 states and 6444 transitions. [2021-06-12 15:25:37,022 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) [2021-06-12 15:25:37,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 6444 transitions. [2021-06-12 15:25:37,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:25:37,024 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:37,024 INFO L472 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] [2021-06-12 15:25:37,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:37,240 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:37,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:37,240 INFO L82 PathProgramCache]: Analyzing trace with hash 49914988, now seen corresponding path program 32 times [2021-06-12 15:25:37,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:37,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180017912] [2021-06-12 15:25:37,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:37,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:37,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180017912] [2021-06-12 15:25:37,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180017912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:37,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050961278] [2021-06-12 15:25:37,320 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 [2021-06-12 15:25:37,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:25:37,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:37,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:25:37,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:37,504 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:37,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050961278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:37,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:37,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 15:25:37,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971700611] [2021-06-12 15:25:37,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:25:37,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:37,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:25:37,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:25:37,505 INFO L87 Difference]: Start difference. First operand 2361 states and 6444 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:37,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:37,799 INFO L93 Difference]: Finished difference Result 3678 states and 9871 transitions. [2021-06-12 15:25:37,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:25:37,801 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 [2021-06-12 15:25:37,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:37,805 INFO L225 Difference]: With dead ends: 3678 [2021-06-12 15:25:37,805 INFO L226 Difference]: Without dead ends: 3408 [2021-06-12 15:25:37,805 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 255.5ms TimeCoverageRelationStatistics Valid=340, Invalid=850, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:25:37,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2021-06-12 15:25:37,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 2541. [2021-06-12 15:25:37,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2541 states, 2540 states have (on average 2.7570866141732284) internal successors, (7003), 2540 states have internal predecessors, (7003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:37,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2541 states to 2541 states and 7003 transitions. [2021-06-12 15:25:37,846 INFO L78 Accepts]: Start accepts. Automaton has 2541 states and 7003 transitions. Word has length 75 [2021-06-12 15:25:37,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:37,846 INFO L482 AbstractCegarLoop]: Abstraction has 2541 states and 7003 transitions. [2021-06-12 15:25:37,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:37,846 INFO L276 IsEmpty]: Start isEmpty. Operand 2541 states and 7003 transitions. [2021-06-12 15:25:37,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:25:37,848 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:37,849 INFO L472 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] [2021-06-12 15:25:38,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-12 15:25:38,065 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:38,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:38,065 INFO L82 PathProgramCache]: Analyzing trace with hash 72258238, now seen corresponding path program 33 times [2021-06-12 15:25:38,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:38,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649132567] [2021-06-12 15:25:38,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:38,143 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:38,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:38,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649132567] [2021-06-12 15:25:38,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649132567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:38,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74716502] [2021-06-12 15:25:38,144 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 [2021-06-12 15:25:38,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 15:25:38,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:38,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:25:38,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:38,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74716502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:38,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:38,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 15:25:38,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272912099] [2021-06-12 15:25:38,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:25:38,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:38,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:25:38,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:25:38,334 INFO L87 Difference]: Start difference. First operand 2541 states and 7003 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) [2021-06-12 15:25:38,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:38,695 INFO L93 Difference]: Finished difference Result 3125 states and 8491 transitions. [2021-06-12 15:25:38,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:25:38,695 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 [2021-06-12 15:25:38,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:38,698 INFO L225 Difference]: With dead ends: 3125 [2021-06-12 15:25:38,698 INFO L226 Difference]: Without dead ends: 2636 [2021-06-12 15:25:38,698 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 293.6ms TimeCoverageRelationStatistics Valid=347, Invalid=985, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:25:38,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2021-06-12 15:25:38,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2486. [2021-06-12 15:25:38,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 2.752112676056338) internal successors, (6839), 2485 states have internal predecessors, (6839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:38,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 6839 transitions. [2021-06-12 15:25:38,726 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 6839 transitions. Word has length 75 [2021-06-12 15:25:38,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:38,726 INFO L482 AbstractCegarLoop]: Abstraction has 2486 states and 6839 transitions. [2021-06-12 15:25:38,726 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) [2021-06-12 15:25:38,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 6839 transitions. [2021-06-12 15:25:38,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:25:38,729 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:38,729 INFO L472 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] [2021-06-12 15:25:38,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-12 15:25:38,929 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:38,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:38,930 INFO L82 PathProgramCache]: Analyzing trace with hash -585056520, now seen corresponding path program 34 times [2021-06-12 15:25:38,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:38,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570165615] [2021-06-12 15:25:38,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:38,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:39,030 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:39,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:39,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570165615] [2021-06-12 15:25:39,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570165615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:39,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614943522] [2021-06-12 15:25:39,030 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 [2021-06-12 15:25:39,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:25:39,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:39,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:25:39,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:39,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614943522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:39,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:39,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-12 15:25:39,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810303519] [2021-06-12 15:25:39,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:25:39,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:39,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:25:39,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:25:39,197 INFO L87 Difference]: Start difference. First operand 2486 states and 6839 transitions. Second operand has 16 states, 16 states have (on average 6.4375) internal successors, (103), 16 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:39,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:39,418 INFO L93 Difference]: Finished difference Result 3591 states and 9369 transitions. [2021-06-12 15:25:39,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:25:39,419 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.4375) internal successors, (103), 16 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have 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 [2021-06-12 15:25:39,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:39,422 INFO L225 Difference]: With dead ends: 3591 [2021-06-12 15:25:39,423 INFO L226 Difference]: Without dead ends: 3242 [2021-06-12 15:25:39,423 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 221.9ms TimeCoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:25:39,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2021-06-12 15:25:39,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 2488. [2021-06-12 15:25:39,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.7515078407720144) internal successors, (6843), 2487 states have internal predecessors, (6843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:39,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6843 transitions. [2021-06-12 15:25:39,450 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6843 transitions. Word has length 75 [2021-06-12 15:25:39,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:39,451 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6843 transitions. [2021-06-12 15:25:39,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.4375) internal successors, (103), 16 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:39,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6843 transitions. [2021-06-12 15:25:39,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:25:39,453 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:39,453 INFO L472 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] [2021-06-12 15:25:39,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-12 15:25:39,657 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:39,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:39,657 INFO L82 PathProgramCache]: Analyzing trace with hash -901780268, now seen corresponding path program 35 times [2021-06-12 15:25:39,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:39,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167445002] [2021-06-12 15:25:39,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:39,837 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:39,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:39,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167445002] [2021-06-12 15:25:39,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167445002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:39,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341099098] [2021-06-12 15:25:39,838 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 [2021-06-12 15:25:39,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 15:25:39,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:39,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:25:39,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:40,003 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:40,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341099098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:40,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:40,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-12 15:25:40,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699229466] [2021-06-12 15:25:40,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:25:40,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:40,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:25:40,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:25:40,005 INFO L87 Difference]: Start difference. First operand 2488 states and 6843 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:40,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:40,149 INFO L93 Difference]: Finished difference Result 3441 states and 8877 transitions. [2021-06-12 15:25:40,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 15:25:40,153 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 [2021-06-12 15:25:40,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:40,157 INFO L225 Difference]: With dead ends: 3441 [2021-06-12 15:25:40,157 INFO L226 Difference]: Without dead ends: 3156 [2021-06-12 15:25:40,157 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 165.4ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:25:40,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3156 states. [2021-06-12 15:25:40,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3156 to 2468. [2021-06-12 15:25:40,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2468 states, 2467 states have (on average 2.7576003242805025) internal successors, (6803), 2467 states have internal predecessors, (6803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:40,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 6803 transitions. [2021-06-12 15:25:40,181 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 6803 transitions. Word has length 75 [2021-06-12 15:25:40,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:40,181 INFO L482 AbstractCegarLoop]: Abstraction has 2468 states and 6803 transitions. [2021-06-12 15:25:40,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:40,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 6803 transitions. [2021-06-12 15:25:40,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:25:40,183 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:40,183 INFO L472 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] [2021-06-12 15:25:40,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-12 15:25:40,384 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:40,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:40,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1780689436, now seen corresponding path program 36 times [2021-06-12 15:25:40,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:40,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037403474] [2021-06-12 15:25:40,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:40,462 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:40,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:40,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037403474] [2021-06-12 15:25:40,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037403474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:40,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307160111] [2021-06-12 15:25:40,462 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 [2021-06-12 15:25:40,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 15:25:40,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:40,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:25:40,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:40,611 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:40,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307160111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:40,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:40,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 15:25:40,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344329939] [2021-06-12 15:25:40,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:25:40,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:40,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:25:40,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:25:40,613 INFO L87 Difference]: Start difference. First operand 2468 states and 6803 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) [2021-06-12 15:25:40,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:40,805 INFO L93 Difference]: Finished difference Result 3376 states and 8747 transitions. [2021-06-12 15:25:40,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:25:40,805 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 75 [2021-06-12 15:25:40,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:40,808 INFO L225 Difference]: With dead ends: 3376 [2021-06-12 15:25:40,808 INFO L226 Difference]: Without dead ends: 3091 [2021-06-12 15:25:40,809 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 183.5ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:25:40,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3091 states. [2021-06-12 15:25:40,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3091 to 2443. [2021-06-12 15:25:40,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2443 states, 2442 states have (on average 2.7653562653562656) internal successors, (6753), 2442 states have internal predecessors, (6753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:40,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 6753 transitions. [2021-06-12 15:25:40,832 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 6753 transitions. Word has length 75 [2021-06-12 15:25:40,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:40,833 INFO L482 AbstractCegarLoop]: Abstraction has 2443 states and 6753 transitions. [2021-06-12 15:25:40,833 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) [2021-06-12 15:25:40,833 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 6753 transitions. [2021-06-12 15:25:40,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:25:40,835 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:40,835 INFO L472 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] [2021-06-12 15:25:41,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:41,035 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:41,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:41,036 INFO L82 PathProgramCache]: Analyzing trace with hash -772418154, now seen corresponding path program 37 times [2021-06-12 15:25:41,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:41,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212683426] [2021-06-12 15:25:41,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:41,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:41,108 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:41,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:41,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212683426] [2021-06-12 15:25:41,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212683426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:41,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437339745] [2021-06-12 15:25:41,108 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 [2021-06-12 15:25:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:41,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:25:41,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:41,249 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:41,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437339745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:41,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:41,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-12 15:25:41,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853839211] [2021-06-12 15:25:41,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:25:41,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:41,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:25:41,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:25:41,250 INFO L87 Difference]: Start difference. First operand 2443 states and 6753 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:41,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:41,460 INFO L93 Difference]: Finished difference Result 3301 states and 8597 transitions. [2021-06-12 15:25:41,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 15:25:41,460 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 [2021-06-12 15:25:41,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:41,462 INFO L225 Difference]: With dead ends: 3301 [2021-06-12 15:25:41,462 INFO L226 Difference]: Without dead ends: 3016 [2021-06-12 15:25:41,462 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 173.3ms TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:25:41,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2021-06-12 15:25:41,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 2418. [2021-06-12 15:25:41,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.7732726520479933) internal successors, (6703), 2417 states have internal predecessors, (6703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:41,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 6703 transitions. [2021-06-12 15:25:41,484 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 6703 transitions. Word has length 75 [2021-06-12 15:25:41,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:41,484 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 6703 transitions. [2021-06-12 15:25:41,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:41,484 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 6703 transitions. [2021-06-12 15:25:41,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:25:41,486 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:41,486 INFO L472 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] [2021-06-12 15:25:41,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-12 15:25:41,687 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:41,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:41,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1507840678, now seen corresponding path program 38 times [2021-06-12 15:25:41,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:41,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984604661] [2021-06-12 15:25:41,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:41,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:41,766 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:41,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:41,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984604661] [2021-06-12 15:25:41,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984604661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:41,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544654125] [2021-06-12 15:25:41,766 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 [2021-06-12 15:25:41,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:25:41,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:41,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:25:41,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:41,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544654125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:41,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:41,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 15:25:41,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133048594] [2021-06-12 15:25:41,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:25:41,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:41,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:25:41,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:25:41,918 INFO L87 Difference]: Start difference. First operand 2418 states and 6703 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) [2021-06-12 15:25:42,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:42,177 INFO L93 Difference]: Finished difference Result 3226 states and 8447 transitions. [2021-06-12 15:25:42,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 15:25:42,177 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 75 [2021-06-12 15:25:42,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:42,180 INFO L225 Difference]: With dead ends: 3226 [2021-06-12 15:25:42,180 INFO L226 Difference]: Without dead ends: 2941 [2021-06-12 15:25:42,180 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 230.4ms TimeCoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:25:42,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2941 states. [2021-06-12 15:25:42,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2941 to 2393. [2021-06-12 15:25:42,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2393 states, 2392 states have (on average 2.7813545150501673) internal successors, (6653), 2392 states have internal predecessors, (6653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:42,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2393 states to 2393 states and 6653 transitions. [2021-06-12 15:25:42,202 INFO L78 Accepts]: Start accepts. Automaton has 2393 states and 6653 transitions. Word has length 75 [2021-06-12 15:25:42,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:42,202 INFO L482 AbstractCegarLoop]: Abstraction has 2393 states and 6653 transitions. [2021-06-12 15:25:42,202 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) [2021-06-12 15:25:42,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2393 states and 6653 transitions. [2021-06-12 15:25:42,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:25:42,204 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:42,204 INFO L472 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] [2021-06-12 15:25:42,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-12 15:25:42,405 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:42,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:42,405 INFO L82 PathProgramCache]: Analyzing trace with hash -103716648, now seen corresponding path program 39 times [2021-06-12 15:25:42,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:42,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274680202] [2021-06-12 15:25:42,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:42,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:42,468 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:42,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:42,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274680202] [2021-06-12 15:25:42,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274680202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:42,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156508867] [2021-06-12 15:25:42,468 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 [2021-06-12 15:25:42,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 15:25:42,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:42,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:25:42,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:42,612 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:42,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156508867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:42,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:42,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-12 15:25:42,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427291050] [2021-06-12 15:25:42,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:25:42,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:42,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:25:42,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:25:42,615 INFO L87 Difference]: Start difference. First operand 2393 states and 6653 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:42,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:42,814 INFO L93 Difference]: Finished difference Result 3151 states and 8297 transitions. [2021-06-12 15:25:42,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 15:25:42,814 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 [2021-06-12 15:25:42,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:42,816 INFO L225 Difference]: With dead ends: 3151 [2021-06-12 15:25:42,816 INFO L226 Difference]: Without dead ends: 2866 [2021-06-12 15:25:42,817 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 158.5ms TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:25:42,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2866 states. [2021-06-12 15:25:42,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2866 to 2368. [2021-06-12 15:25:42,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 2.7896070975918885) internal successors, (6603), 2367 states have internal predecessors, (6603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:42,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 6603 transitions. [2021-06-12 15:25:42,837 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 6603 transitions. Word has length 75 [2021-06-12 15:25:42,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:42,837 INFO L482 AbstractCegarLoop]: Abstraction has 2368 states and 6603 transitions. [2021-06-12 15:25:42,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:42,837 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 6603 transitions. [2021-06-12 15:25:42,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:25:42,839 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:42,839 INFO L472 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] [2021-06-12 15:25:43,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:43,040 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:43,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:43,040 INFO L82 PathProgramCache]: Analyzing trace with hash 865171944, now seen corresponding path program 40 times [2021-06-12 15:25:43,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:43,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855004335] [2021-06-12 15:25:43,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:43,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:43,107 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:43,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:43,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855004335] [2021-06-12 15:25:43,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855004335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:43,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559245721] [2021-06-12 15:25:43,107 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 [2021-06-12 15:25:43,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:25:43,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:43,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:25:43,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:43,273 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:43,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559245721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:43,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:43,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 15:25:43,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948968668] [2021-06-12 15:25:43,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:25:43,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:43,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:25:43,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:25:43,274 INFO L87 Difference]: Start difference. First operand 2368 states and 6603 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) [2021-06-12 15:25:43,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:43,567 INFO L93 Difference]: Finished difference Result 3076 states and 8147 transitions. [2021-06-12 15:25:43,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:25:43,567 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 75 [2021-06-12 15:25:43,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:43,570 INFO L225 Difference]: With dead ends: 3076 [2021-06-12 15:25:43,570 INFO L226 Difference]: Without dead ends: 2791 [2021-06-12 15:25:43,570 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 259.5ms TimeCoverageRelationStatistics Valid=251, Invalid=741, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:25:43,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-06-12 15:25:43,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2343. [2021-06-12 15:25:43,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 2.7980358667805296) internal successors, (6553), 2342 states have internal predecessors, (6553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:43,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 6553 transitions. [2021-06-12 15:25:43,590 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 6553 transitions. Word has length 75 [2021-06-12 15:25:43,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:43,591 INFO L482 AbstractCegarLoop]: Abstraction has 2343 states and 6553 transitions. [2021-06-12 15:25:43,591 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) [2021-06-12 15:25:43,591 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 6553 transitions. [2021-06-12 15:25:43,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:25:43,592 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:43,592 INFO L472 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] [2021-06-12 15:25:43,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-12 15:25:43,793 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:43,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:43,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1248708250, now seen corresponding path program 41 times [2021-06-12 15:25:43,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:43,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601159637] [2021-06-12 15:25:43,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:43,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:43,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601159637] [2021-06-12 15:25:43,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601159637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:43,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315188300] [2021-06-12 15:25:43,899 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 [2021-06-12 15:25:43,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 15:25:43,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:43,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:25:43,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:44,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315188300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:44,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:44,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-12 15:25:44,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492352638] [2021-06-12 15:25:44,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:25:44,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:44,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:25:44,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:25:44,032 INFO L87 Difference]: Start difference. First operand 2343 states and 6553 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:44,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:44,257 INFO L93 Difference]: Finished difference Result 3903 states and 10471 transitions. [2021-06-12 15:25:44,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 15:25:44,258 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 [2021-06-12 15:25:44,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:44,262 INFO L225 Difference]: With dead ends: 3903 [2021-06-12 15:25:44,262 INFO L226 Difference]: Without dead ends: 3603 [2021-06-12 15:25:44,263 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 192.4ms TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:25:44,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3603 states. [2021-06-12 15:25:44,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3603 to 2508. [2021-06-12 15:25:44,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2507 states have (on average 2.820901475867571) internal successors, (7072), 2507 states have internal predecessors, (7072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:44,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 7072 transitions. [2021-06-12 15:25:44,292 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 7072 transitions. Word has length 75 [2021-06-12 15:25:44,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:44,292 INFO L482 AbstractCegarLoop]: Abstraction has 2508 states and 7072 transitions. [2021-06-12 15:25:44,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:44,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 7072 transitions. [2021-06-12 15:25:44,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:25:44,294 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:44,294 INFO L472 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] [2021-06-12 15:25:44,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:44,494 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:44,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:44,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1984460919, now seen corresponding path program 42 times [2021-06-12 15:25:44,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:44,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281325669] [2021-06-12 15:25:44,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:44,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:44,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281325669] [2021-06-12 15:25:44,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281325669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:44,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346074455] [2021-06-12 15:25:44,578 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 [2021-06-12 15:25:44,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 15:25:44,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:44,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:25:44,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:44,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346074455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:44,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:44,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-12 15:25:44,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332811784] [2021-06-12 15:25:44,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:25:44,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:44,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:25:44,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:25:44,743 INFO L87 Difference]: Start difference. First operand 2508 states and 7072 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:45,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:45,094 INFO L93 Difference]: Finished difference Result 3285 states and 8946 transitions. [2021-06-12 15:25:45,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 15:25:45,094 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have 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 [2021-06-12 15:25:45,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:45,097 INFO L225 Difference]: With dead ends: 3285 [2021-06-12 15:25:45,097 INFO L226 Difference]: Without dead ends: 2706 [2021-06-12 15:25:45,097 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 300.3ms TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:25:45,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2706 states. [2021-06-12 15:25:45,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2706 to 1634. [2021-06-12 15:25:45,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 2.7348438456827924) internal successors, (4466), 1633 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:45,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 4466 transitions. [2021-06-12 15:25:45,114 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 4466 transitions. Word has length 75 [2021-06-12 15:25:45,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:45,114 INFO L482 AbstractCegarLoop]: Abstraction has 1634 states and 4466 transitions. [2021-06-12 15:25:45,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:45,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 4466 transitions. [2021-06-12 15:25:45,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:25:45,115 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:45,116 INFO L472 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] [2021-06-12 15:25:45,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-12 15:25:45,316 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:45,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:45,316 INFO L82 PathProgramCache]: Analyzing trace with hash -711333330, now seen corresponding path program 43 times [2021-06-12 15:25:45,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:45,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766660184] [2021-06-12 15:25:45,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:45,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-12 15:25:45,322 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-12 15:25:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-12 15:25:45,327 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-12 15:25:45,346 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-12 15:25:45,347 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-12 15:25:45,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-06-12 15:25:45,349 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 15:25:45,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 03:25:45 BasicIcfg [2021-06-12 15:25:45,390 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 15:25:45,390 INFO L168 Benchmark]: Toolchain (without parser) took 35640.13 ms. Allocated memory was 180.4 MB in the beginning and 558.9 MB in the end (delta: 378.5 MB). Free memory was 143.0 MB in the beginning and 263.7 MB in the end (delta: -120.7 MB). Peak memory consumption was 258.8 MB. Max. memory is 8.0 GB. [2021-06-12 15:25:45,390 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 180.4 MB. Free memory is still 161.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 15:25:45,391 INFO L168 Benchmark]: CACSL2BoogieTranslator took 409.51 ms. Allocated memory is still 180.4 MB. Free memory was 142.8 MB in the beginning and 143.7 MB in the end (delta: -815.9 kB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-06-12 15:25:45,391 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.08 ms. Allocated memory is still 180.4 MB. Free memory was 143.1 MB in the beginning and 141.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-12 15:25:45,391 INFO L168 Benchmark]: Boogie Preprocessor took 29.36 ms. Allocated memory is still 180.4 MB. Free memory was 141.6 MB in the beginning and 140.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 15:25:45,391 INFO L168 Benchmark]: RCFGBuilder took 307.92 ms. Allocated memory is still 180.4 MB. Free memory was 140.0 MB in the beginning and 118.5 MB in the end (delta: 21.5 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-06-12 15:25:45,391 INFO L168 Benchmark]: TraceAbstraction took 34845.86 ms. Allocated memory was 180.4 MB in the beginning and 558.9 MB in the end (delta: 378.5 MB). Free memory was 118.0 MB in the beginning and 263.7 MB in the end (delta: -145.7 MB). Peak memory consumption was 233.8 MB. Max. memory is 8.0 GB. [2021-06-12 15:25:45,391 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 180.4 MB. Free memory is still 161.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 409.51 ms. Allocated memory is still 180.4 MB. Free memory was 142.8 MB in the beginning and 143.7 MB in the end (delta: -815.9 kB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 38.08 ms. Allocated memory is still 180.4 MB. Free memory was 143.1 MB in the beginning and 141.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.36 ms. Allocated memory is still 180.4 MB. Free memory was 141.6 MB in the beginning and 140.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 307.92 ms. Allocated memory is still 180.4 MB. Free memory was 140.0 MB in the beginning and 118.5 MB in the end (delta: 21.5 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 34845.86 ms. Allocated memory was 180.4 MB in the beginning and 558.9 MB in the end (delta: 378.5 MB). Free memory was 118.0 MB in the beginning and 263.7 MB in the end (delta: -145.7 MB). Peak memory consumption was 233.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; VAL [i=3, j=6] [L712] 0 pthread_t id1, id2; VAL [i=3, j=6] [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L716] 0 int condI = i >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1, k++=0] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1, k++=0] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2, k++=1] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2, k++=1] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3, k++=2] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3, k++=2] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4, k++=3] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4, k++=3] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L719] 0 int condJ = j >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L721] COND TRUE 0 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L722] 0 reach_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 34734.2ms, OverallIterations: 53, TraceHistogramMax: 5, EmptinessCheckTime: 115.0ms, AutomataDifference: 10964.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 59.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5131 SDtfs, 18088 SDslu, 33164 SDs, 0 SdLazy, 5887 SolverSat, 1884 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2611.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4202 GetRequests, 2989 SyntacticMatches, 0 SemanticMatches, 1213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6218 ImplicationChecksByTransitivity, 9227.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2541occurred in iteration=42, InterpolantAutomatonStates: 1028, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1437.9ms AutomataMinimizationTime, 52 MinimizatonAttempts, 26141 StatesRemovedByMinimization, 52 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 499.5ms SsaConstructionTime, 1143.5ms SatisfiabilityAnalysisTime, 8635.8ms InterpolantComputationTime, 6288 NumberOfCodeBlocks, 6284 NumberOfCodeBlocksAsserted, 182 NumberOfCheckSat, 6110 ConstructedInterpolants, 0 QuantifiedInterpolants, 23682 SizeOfPredicates, 353 NumberOfNonLiveVariables, 6988 ConjunctsInSsa, 601 ConjunctsInUnsatCore, 98 InterpolantComputations, 6 PerfectInterpolantSequences, 40/3200 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...