/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 15:41:03,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 15:41:03,720 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 15:41:03,740 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 15:41:03,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-21 15:41:03,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-21 15:41:03,788 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-21 15:41:03,791 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 [2021-05-21 15:41:03,819 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 15:41:03,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 15:41:03,819 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 15:41:03,820 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 15:41:03,820 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 15:41:03,820 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 15:41:03,820 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 15:41:03,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 15:41:03,821 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 15:41:03,821 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 15:41:03,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 15:41:03,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 15:41:03,821 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 15:41:03,821 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 15:41:03,821 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 15:41:03,821 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 15:41:03,821 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 15:41:03,822 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 15:41:03,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 15:41:03,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 15:41:03,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 15:41:03,823 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 15:41:03,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 15:41:03,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 15:41:03,823 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 15:41:03,823 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 15:41:03,823 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 15:41:03,824 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 15:41:03,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 15:41:03,824 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 15:41:03,824 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 15:41:03,824 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 15:41:04,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 15:41:04,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 15:41:04,090 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 15:41:04,091 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-21 15:41:04,092 INFO L275 PluginConnector]: CDTParser initialized [2021-05-21 15:41:04,093 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2021-05-21 15:41:04,138 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10e9b9c5d/1dc600517d3e45cabdff796ab3514a07/FLAG9e593acfd [2021-05-21 15:41:04,553 INFO L306 CDTParser]: Found 1 translation units. [2021-05-21 15:41:04,553 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2021-05-21 15:41:04,565 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10e9b9c5d/1dc600517d3e45cabdff796ab3514a07/FLAG9e593acfd [2021-05-21 15:41:04,578 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10e9b9c5d/1dc600517d3e45cabdff796ab3514a07 [2021-05-21 15:41:04,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 15:41:04,582 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-21 15:41:04,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-21 15:41:04,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-21 15:41:04,586 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-21 15:41:04,586 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.05 03:41:04" (1/1) ... [2021-05-21 15:41:04,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5900bdab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:41:04, skipping insertion in model container [2021-05-21 15:41:04,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.05 03:41:04" (1/1) ... [2021-05-21 15:41:04,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-21 15:41:04,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-21 15:41:04,900 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i[30950,30963] [2021-05-21 15:41:04,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-21 15:41:04,907 INFO L203 MainTranslator]: Completed pre-run [2021-05-21 15:41:04,931 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i[30950,30963] [2021-05-21 15:41:04,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-21 15:41:04,970 INFO L208 MainTranslator]: Completed translation [2021-05-21 15:41:04,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:41:04 WrapperNode [2021-05-21 15:41:04,971 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-21 15:41:04,972 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 15:41:04,972 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 15:41:04,972 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 15:41:04,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:41:04" (1/1) ... [2021-05-21 15:41:04,999 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:41:04" (1/1) ... [2021-05-21 15:41:05,014 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 15:41:05,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 15:41:05,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 15:41:05,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 15:41:05,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:41:04" (1/1) ... [2021-05-21 15:41:05,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:41:04" (1/1) ... [2021-05-21 15:41:05,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:41:04" (1/1) ... [2021-05-21 15:41:05,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:41:04" (1/1) ... [2021-05-21 15:41:05,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:41:04" (1/1) ... [2021-05-21 15:41:05,033 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:41:04" (1/1) ... [2021-05-21 15:41:05,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:41:04" (1/1) ... [2021-05-21 15:41:05,036 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 15:41:05,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 15:41:05,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 15:41:05,037 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 15:41:05,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:41:04" (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 [2021-05-21 15:41:05,085 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-05-21 15:41:05,086 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-05-21 15:41:05,086 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-05-21 15:41:05,086 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-05-21 15:41:05,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-21 15:41:05,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-05-21 15:41:05,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-21 15:41:05,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-21 15:41:05,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-21 15:41:05,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-05-21 15:41:05,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 15:41:05,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 15:41:05,087 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 15:41:05,349 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 15:41:05,349 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-05-21 15:41:05,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 03:41:05 BoogieIcfgContainer [2021-05-21 15:41:05,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 15:41:05,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 15:41:05,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 15:41:05,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 15:41:05,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.05 03:41:04" (1/3) ... [2021-05-21 15:41:05,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16b8478 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 03:41:05, skipping insertion in model container [2021-05-21 15:41:05,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:41:04" (2/3) ... [2021-05-21 15:41:05,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16b8478 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 03:41:05, skipping insertion in model container [2021-05-21 15:41:05,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 03:41:05" (3/3) ... [2021-05-21 15:41:05,355 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2021-05-21 15:41:05,359 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 15:41:05,359 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 15:41:05,359 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 15:41:05,359 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 15:41:05,380 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,380 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,381 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,381 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,381 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,381 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,381 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,381 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,382 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,382 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,382 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,382 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,382 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,383 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,383 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,383 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,383 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,383 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,383 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,383 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,384 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,384 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,384 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,384 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,385 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,385 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,385 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,385 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,385 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,385 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,386 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,386 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,386 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,386 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,387 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,387 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,387 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,387 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,387 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,387 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,388 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,388 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,388 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,388 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,388 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,388 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,389 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,389 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,389 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,389 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,389 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,389 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,390 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,390 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,391 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,391 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,393 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,393 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,393 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,393 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,393 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,393 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,401 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,402 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,402 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,402 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,402 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,402 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:41:05,404 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-21 15:41:05,417 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-21 15:41:05,437 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 15:41:05,438 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 15:41:05,438 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 15:41:05,438 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 15:41:05,438 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 15:41:05,438 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 15:41:05,438 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 15:41:05,438 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 15:41:05,447 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-05-21 15:41:05,510 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) [2021-05-21 15:41:05,515 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) [2021-05-21 15:41:05,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 15:41:05,525 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:05,526 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:05,526 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:05,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:05,531 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-05-21 15:41:05,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:05,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20812254] [2021-05-21 15:41:05,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:05,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:05,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:05,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20812254] [2021-05-21 15:41:05,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20812254] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:41:05,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:41:05,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 15:41:05,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416642460] [2021-05-21 15:41:05,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 15:41:05,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:05,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 15:41:05,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 15:41:05,810 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) [2021-05-21 15:41:05,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:05,942 INFO L93 Difference]: Finished difference Result 3467 states and 10030 transitions. [2021-05-21 15:41:05,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 15:41:05,944 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 [2021-05-21 15:41:05,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:05,958 INFO L225 Difference]: With dead ends: 3467 [2021-05-21 15:41:05,959 INFO L226 Difference]: Without dead ends: 1242 [2021-05-21 15:41:05,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-21 15:41:05,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-05-21 15:41:06,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 942. [2021-05-21 15:41:06,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 941 states have (on average 2.7077577045696066) internal successors, (2548), 941 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:06,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 2548 transitions. [2021-05-21 15:41:06,035 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 2548 transitions. Word has length 32 [2021-05-21 15:41:06,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:06,035 INFO L482 AbstractCegarLoop]: Abstraction has 942 states and 2548 transitions. [2021-05-21 15:41:06,035 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) [2021-05-21 15:41:06,035 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 2548 transitions. [2021-05-21 15:41:06,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-21 15:41:06,040 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:06,040 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:06,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 15:41:06,041 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:06,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:06,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1720134605, now seen corresponding path program 1 times [2021-05-21 15:41:06,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:06,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002620278] [2021-05-21 15:41:06,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:06,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:06,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:06,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002620278] [2021-05-21 15:41:06,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002620278] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:41:06,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:41:06,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 15:41:06,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71618225] [2021-05-21 15:41:06,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 15:41:06,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:06,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 15:41:06,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-21 15:41:06,177 INFO L87 Difference]: Start difference. First operand 942 states and 2548 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:06,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:06,262 INFO L93 Difference]: Finished difference Result 1194 states and 3180 transitions. [2021-05-21 15:41:06,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 15:41:06,262 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 [2021-05-21 15:41:06,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:06,268 INFO L225 Difference]: With dead ends: 1194 [2021-05-21 15:41:06,268 INFO L226 Difference]: Without dead ends: 942 [2021-05-21 15:41:06,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-21 15:41:06,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-05-21 15:41:06,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 800. [2021-05-21 15:41:06,284 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) [2021-05-21 15:41:06,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-05-21 15:41:06,286 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 36 [2021-05-21 15:41:06,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:06,287 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-05-21 15:41:06,287 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) [2021-05-21 15:41:06,287 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-05-21 15:41:06,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-21 15:41:06,288 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:06,289 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:06,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 15:41:06,289 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:06,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:06,295 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-05-21 15:41:06,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:06,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304410825] [2021-05-21 15:41:06,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:06,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:06,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:06,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:06,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304410825] [2021-05-21 15:41:06,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304410825] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:41:06,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:41:06,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 15:41:06,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997653691] [2021-05-21 15:41:06,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 15:41:06,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:06,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 15:41:06,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-21 15:41:06,411 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) [2021-05-21 15:41:06,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:06,489 INFO L93 Difference]: Finished difference Result 1302 states and 3436 transitions. [2021-05-21 15:41:06,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 15:41:06,489 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 [2021-05-21 15:41:06,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:06,492 INFO L225 Difference]: With dead ends: 1302 [2021-05-21 15:41:06,493 INFO L226 Difference]: Without dead ends: 920 [2021-05-21 15:41:06,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-21 15:41:06,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-05-21 15:41:06,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-05-21 15:41:06,521 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) [2021-05-21 15:41:06,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-05-21 15:41:06,524 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-05-21 15:41:06,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:06,524 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-05-21 15:41:06,524 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) [2021-05-21 15:41:06,524 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-05-21 15:41:06,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-21 15:41:06,525 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:06,525 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:06,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 15:41:06,525 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:06,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:06,526 INFO L82 PathProgramCache]: Analyzing trace with hash 307394794, now seen corresponding path program 1 times [2021-05-21 15:41:06,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:06,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059980185] [2021-05-21 15:41:06,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:06,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:06,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:06,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:06,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059980185] [2021-05-21 15:41:06,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059980185] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:41:06,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:41:06,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 15:41:06,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138331624] [2021-05-21 15:41:06,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 15:41:06,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:06,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 15:41:06,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 15:41:06,597 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) [2021-05-21 15:41:06,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:06,661 INFO L93 Difference]: Finished difference Result 1332 states and 3512 transitions. [2021-05-21 15:41:06,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 15:41:06,662 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 [2021-05-21 15:41:06,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:06,667 INFO L225 Difference]: With dead ends: 1332 [2021-05-21 15:41:06,667 INFO L226 Difference]: Without dead ends: 1072 [2021-05-21 15:41:06,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-21 15:41:06,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-05-21 15:41:06,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 876. [2021-05-21 15:41:06,686 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) [2021-05-21 15:41:06,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-05-21 15:41:06,688 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-05-21 15:41:06,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:06,690 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-05-21 15:41:06,690 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) [2021-05-21 15:41:06,690 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-05-21 15:41:06,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-21 15:41:06,691 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:06,691 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:06,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 15:41:06,691 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:06,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:06,692 INFO L82 PathProgramCache]: Analyzing trace with hash -258094508, now seen corresponding path program 2 times [2021-05-21 15:41:06,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:06,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453859206] [2021-05-21 15:41:06,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:06,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:06,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:06,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:06,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453859206] [2021-05-21 15:41:06,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453859206] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:41:06,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:41:06,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 15:41:06,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564777663] [2021-05-21 15:41:06,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 15:41:06,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:06,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 15:41:06,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 15:41:06,781 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) [2021-05-21 15:41:06,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:06,874 INFO L93 Difference]: Finished difference Result 1772 states and 4744 transitions. [2021-05-21 15:41:06,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 15:41:06,874 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 [2021-05-21 15:41:06,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:06,879 INFO L225 Difference]: With dead ends: 1772 [2021-05-21 15:41:06,880 INFO L226 Difference]: Without dead ends: 1505 [2021-05-21 15:41:06,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 72.9ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-21 15:41:06,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-05-21 15:41:06,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 975. [2021-05-21 15:41:06,896 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) [2021-05-21 15:41:06,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2628 transitions. [2021-05-21 15:41:06,898 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2628 transitions. Word has length 40 [2021-05-21 15:41:06,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:06,898 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 2628 transitions. [2021-05-21 15:41:06,899 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) [2021-05-21 15:41:06,899 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2628 transitions. [2021-05-21 15:41:06,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-21 15:41:06,900 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:06,900 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:06,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 15:41:06,900 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:06,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:06,900 INFO L82 PathProgramCache]: Analyzing trace with hash 129784312, now seen corresponding path program 3 times [2021-05-21 15:41:06,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:06,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122989984] [2021-05-21 15:41:06,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:06,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:06,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:06,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:06,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122989984] [2021-05-21 15:41:06,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122989984] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:41:06,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:41:06,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 15:41:06,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431010577] [2021-05-21 15:41:06,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 15:41:06,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:06,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 15:41:06,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 15:41:06,953 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) [2021-05-21 15:41:07,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:07,027 INFO L93 Difference]: Finished difference Result 2211 states and 5878 transitions. [2021-05-21 15:41:07,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 15:41:07,028 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 [2021-05-21 15:41:07,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:07,036 INFO L225 Difference]: With dead ends: 2211 [2021-05-21 15:41:07,036 INFO L226 Difference]: Without dead ends: 1944 [2021-05-21 15:41:07,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-05-21 15:41:07,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-05-21 15:41:07,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1127. [2021-05-21 15:41:07,066 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) [2021-05-21 15:41:07,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3119 transitions. [2021-05-21 15:41:07,069 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3119 transitions. Word has length 40 [2021-05-21 15:41:07,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:07,069 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 3119 transitions. [2021-05-21 15:41:07,069 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) [2021-05-21 15:41:07,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3119 transitions. [2021-05-21 15:41:07,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-21 15:41:07,071 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:07,071 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:07,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-21 15:41:07,071 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:07,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:07,072 INFO L82 PathProgramCache]: Analyzing trace with hash 152127562, now seen corresponding path program 4 times [2021-05-21 15:41:07,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:07,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120796944] [2021-05-21 15:41:07,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:07,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:07,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:07,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:07,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120796944] [2021-05-21 15:41:07,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120796944] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:41:07,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:41:07,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 15:41:07,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753757833] [2021-05-21 15:41:07,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 15:41:07,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:07,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 15:41:07,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-21 15:41:07,151 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) [2021-05-21 15:41:07,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:07,258 INFO L93 Difference]: Finished difference Result 1519 states and 4031 transitions. [2021-05-21 15:41:07,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 15:41:07,258 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 [2021-05-21 15:41:07,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:07,263 INFO L225 Difference]: With dead ends: 1519 [2021-05-21 15:41:07,263 INFO L226 Difference]: Without dead ends: 1138 [2021-05-21 15:41:07,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-05-21 15:41:07,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-05-21 15:41:07,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1033. [2021-05-21 15:41:07,295 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) [2021-05-21 15:41:07,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2823 transitions. [2021-05-21 15:41:07,299 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2823 transitions. Word has length 40 [2021-05-21 15:41:07,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:07,299 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 2823 transitions. [2021-05-21 15:41:07,299 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) [2021-05-21 15:41:07,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2823 transitions. [2021-05-21 15:41:07,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 15:41:07,300 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:07,300 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:07,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-21 15:41:07,301 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:07,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:07,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1301576209, now seen corresponding path program 1 times [2021-05-21 15:41:07,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:07,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599686846] [2021-05-21 15:41:07,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:07,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:07,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599686846] [2021-05-21 15:41:07,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599686846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:07,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136891912] [2021-05-21 15:41:07,368 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 [2021-05-21 15:41:07,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:07,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 15:41:07,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:07,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136891912] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:07,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:07,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 15:41:07,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058935702] [2021-05-21 15:41:07,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 15:41:07,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:07,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 15:41:07,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 15:41:07,615 INFO L87 Difference]: Start difference. First operand 1033 states and 2823 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:07,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:07,730 INFO L93 Difference]: Finished difference Result 1451 states and 3787 transitions. [2021-05-21 15:41:07,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 15:41:07,730 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-21 15:41:07,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:07,734 INFO L225 Difference]: With dead ends: 1451 [2021-05-21 15:41:07,735 INFO L226 Difference]: Without dead ends: 1181 [2021-05-21 15:41:07,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:41:07,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-05-21 15:41:07,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1083. [2021-05-21 15:41:07,751 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) [2021-05-21 15:41:07,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 2928 transitions. [2021-05-21 15:41:07,753 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 2928 transitions. Word has length 45 [2021-05-21 15:41:07,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:07,753 INFO L482 AbstractCegarLoop]: Abstraction has 1083 states and 2928 transitions. [2021-05-21 15:41:07,753 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) [2021-05-21 15:41:07,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 2928 transitions. [2021-05-21 15:41:07,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 15:41:07,754 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:07,754 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:07,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-21 15:41:07,969 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:07,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:07,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1689455029, now seen corresponding path program 2 times [2021-05-21 15:41:07,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:07,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2421564] [2021-05-21 15:41:07,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:07,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:08,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:08,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2421564] [2021-05-21 15:41:08,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2421564] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:08,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876549668] [2021-05-21 15:41:08,022 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 [2021-05-21 15:41:08,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:41:08,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:08,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 15:41:08,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:08,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876549668] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:08,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:08,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-21 15:41:08,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742698799] [2021-05-21 15:41:08,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 15:41:08,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:08,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 15:41:08,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 15:41:08,163 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) [2021-05-21 15:41:08,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:08,265 INFO L93 Difference]: Finished difference Result 2333 states and 6191 transitions. [2021-05-21 15:41:08,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 15:41:08,265 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 [2021-05-21 15:41:08,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:08,272 INFO L225 Difference]: With dead ends: 2333 [2021-05-21 15:41:08,273 INFO L226 Difference]: Without dead ends: 2063 [2021-05-21 15:41:08,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:41:08,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-05-21 15:41:08,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1218. [2021-05-21 15:41:08,296 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) [2021-05-21 15:41:08,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 3367 transitions. [2021-05-21 15:41:08,298 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 3367 transitions. Word has length 45 [2021-05-21 15:41:08,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:08,298 INFO L482 AbstractCegarLoop]: Abstraction has 1218 states and 3367 transitions. [2021-05-21 15:41:08,298 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) [2021-05-21 15:41:08,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 3367 transitions. [2021-05-21 15:41:08,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 15:41:08,300 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:08,300 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:08,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:08,513 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:08,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:08,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1711798279, now seen corresponding path program 3 times [2021-05-21 15:41:08,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:08,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235553853] [2021-05-21 15:41:08,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:08,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:08,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235553853] [2021-05-21 15:41:08,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235553853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:08,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528541695] [2021-05-21 15:41:08,558 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 [2021-05-21 15:41:08,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 15:41:08,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:08,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 15:41:08,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:08,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528541695] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:08,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:08,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 15:41:08,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120255828] [2021-05-21 15:41:08,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 15:41:08,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:08,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 15:41:08,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-21 15:41:08,723 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) [2021-05-21 15:41:08,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:08,921 INFO L93 Difference]: Finished difference Result 2121 states and 5621 transitions. [2021-05-21 15:41:08,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 15:41:08,921 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 [2021-05-21 15:41:08,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:08,926 INFO L225 Difference]: With dead ends: 2121 [2021-05-21 15:41:08,926 INFO L226 Difference]: Without dead ends: 1546 [2021-05-21 15:41:08,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 162.6ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:41:08,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2021-05-21 15:41:08,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1253. [2021-05-21 15:41:08,946 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) [2021-05-21 15:41:08,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 3458 transitions. [2021-05-21 15:41:08,949 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 3458 transitions. Word has length 45 [2021-05-21 15:41:08,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:08,949 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 3458 transitions. [2021-05-21 15:41:08,949 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) [2021-05-21 15:41:08,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 3458 transitions. [2021-05-21 15:41:08,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 15:41:08,951 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:08,951 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:09,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-21 15:41:09,165 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:09,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:09,165 INFO L82 PathProgramCache]: Analyzing trace with hash 315802636, now seen corresponding path program 1 times [2021-05-21 15:41:09,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:09,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446999946] [2021-05-21 15:41:09,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:09,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:09,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:09,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446999946] [2021-05-21 15:41:09,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446999946] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:09,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600270536] [2021-05-21 15:41:09,210 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 [2021-05-21 15:41:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:09,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 15:41:09,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:09,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:09,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600270536] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:09,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:09,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 15:41:09,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798879998] [2021-05-21 15:41:09,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 15:41:09,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:09,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 15:41:09,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 15:41:09,354 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) [2021-05-21 15:41:09,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:09,466 INFO L93 Difference]: Finished difference Result 2398 states and 6444 transitions. [2021-05-21 15:41:09,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 15:41:09,467 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 [2021-05-21 15:41:09,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:09,472 INFO L225 Difference]: With dead ends: 2398 [2021-05-21 15:41:09,472 INFO L226 Difference]: Without dead ends: 1926 [2021-05-21 15:41:09,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 90.1ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:41:09,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-05-21 15:41:09,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1456. [2021-05-21 15:41:09,506 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) [2021-05-21 15:41:09,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 3969 transitions. [2021-05-21 15:41:09,510 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 3969 transitions. Word has length 45 [2021-05-21 15:41:09,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:09,510 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 3969 transitions. [2021-05-21 15:41:09,510 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) [2021-05-21 15:41:09,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 3969 transitions. [2021-05-21 15:41:09,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 15:41:09,514 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:09,514 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:09,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:09,729 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:09,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:09,729 INFO L82 PathProgramCache]: Analyzing trace with hash 456189922, now seen corresponding path program 1 times [2021-05-21 15:41:09,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:09,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356470223] [2021-05-21 15:41:09,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:09,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:09,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:09,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356470223] [2021-05-21 15:41:09,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356470223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:09,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386730642] [2021-05-21 15:41:09,810 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 [2021-05-21 15:41:09,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:09,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:41:09,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:09,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386730642] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:09,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:09,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-05-21 15:41:09,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988648504] [2021-05-21 15:41:09,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 15:41:09,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:09,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 15:41:09,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-21 15:41:09,992 INFO L87 Difference]: Start difference. First operand 1456 states and 3969 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:10,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:10,128 INFO L93 Difference]: Finished difference Result 1866 states and 4917 transitions. [2021-05-21 15:41:10,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 15:41:10,128 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 15:41:10,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:10,143 INFO L225 Difference]: With dead ends: 1866 [2021-05-21 15:41:10,144 INFO L226 Difference]: Without dead ends: 1596 [2021-05-21 15:41:10,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 129.3ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-05-21 15:41:10,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-05-21 15:41:10,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1531. [2021-05-21 15:41:10,167 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) [2021-05-21 15:41:10,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4119 transitions. [2021-05-21 15:41:10,170 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4119 transitions. Word has length 55 [2021-05-21 15:41:10,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:10,170 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4119 transitions. [2021-05-21 15:41:10,170 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) [2021-05-21 15:41:10,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4119 transitions. [2021-05-21 15:41:10,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 15:41:10,172 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:10,172 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:10,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-21 15:41:10,388 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:10,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:10,389 INFO L82 PathProgramCache]: Analyzing trace with hash 117785766, now seen corresponding path program 2 times [2021-05-21 15:41:10,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:10,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608515914] [2021-05-21 15:41:10,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:10,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:10,445 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:10,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:10,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608515914] [2021-05-21 15:41:10,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608515914] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:10,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017524248] [2021-05-21 15:41:10,446 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 [2021-05-21 15:41:10,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:41:10,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:10,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:41:10,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:10,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017524248] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:10,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:10,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-21 15:41:10,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598718249] [2021-05-21 15:41:10,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 15:41:10,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:10,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 15:41:10,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-21 15:41:10,605 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) [2021-05-21 15:41:10,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:10,739 INFO L93 Difference]: Finished difference Result 1981 states and 5147 transitions. [2021-05-21 15:41:10,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 15:41:10,740 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 [2021-05-21 15:41:10,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:10,743 INFO L225 Difference]: With dead ends: 1981 [2021-05-21 15:41:10,743 INFO L226 Difference]: Without dead ends: 1711 [2021-05-21 15:41:10,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-05-21 15:41:10,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2021-05-21 15:41:10,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1531. [2021-05-21 15:41:10,764 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) [2021-05-21 15:41:10,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4119 transitions. [2021-05-21 15:41:10,767 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4119 transitions. Word has length 55 [2021-05-21 15:41:10,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:10,768 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4119 transitions. [2021-05-21 15:41:10,768 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) [2021-05-21 15:41:10,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4119 transitions. [2021-05-21 15:41:10,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 15:41:10,769 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:10,770 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:10,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:10,985 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:10,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:10,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1597456522, now seen corresponding path program 3 times [2021-05-21 15:41:10,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:10,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584380513] [2021-05-21 15:41:10,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:10,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:11,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:11,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584380513] [2021-05-21 15:41:11,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584380513] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:11,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243715804] [2021-05-21 15:41:11,044 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 [2021-05-21 15:41:11,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 15:41:11,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:11,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:41:11,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:11,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243715804] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:11,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:11,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-05-21 15:41:11,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139659133] [2021-05-21 15:41:11,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 15:41:11,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:11,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 15:41:11,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-21 15:41:11,203 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) [2021-05-21 15:41:11,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:11,434 INFO L93 Difference]: Finished difference Result 2669 states and 6993 transitions. [2021-05-21 15:41:11,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 15:41:11,434 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 [2021-05-21 15:41:11,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:11,439 INFO L225 Difference]: With dead ends: 2669 [2021-05-21 15:41:11,439 INFO L226 Difference]: Without dead ends: 2046 [2021-05-21 15:41:11,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 173.2ms TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:41:11,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-05-21 15:41:11,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1561. [2021-05-21 15:41:11,462 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) [2021-05-21 15:41:11,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 4244 transitions. [2021-05-21 15:41:11,466 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 4244 transitions. Word has length 55 [2021-05-21 15:41:11,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:11,466 INFO L482 AbstractCegarLoop]: Abstraction has 1561 states and 4244 transitions. [2021-05-21 15:41:11,466 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) [2021-05-21 15:41:11,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 4244 transitions. [2021-05-21 15:41:11,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 15:41:11,468 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:11,468 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:11,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-21 15:41:11,683 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:11,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:11,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1664863172, now seen corresponding path program 4 times [2021-05-21 15:41:11,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:11,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317960793] [2021-05-21 15:41:11,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:11,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:11,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:11,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317960793] [2021-05-21 15:41:11,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317960793] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:11,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116612969] [2021-05-21 15:41:11,740 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 [2021-05-21 15:41:11,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:41:11,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:11,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:41:11,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:11,890 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:11,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116612969] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:11,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:11,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-21 15:41:11,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317626655] [2021-05-21 15:41:11,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 15:41:11,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:11,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 15:41:11,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-21 15:41:11,891 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) [2021-05-21 15:41:12,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:12,060 INFO L93 Difference]: Finished difference Result 2878 states and 7671 transitions. [2021-05-21 15:41:12,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 15:41:12,060 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 [2021-05-21 15:41:12,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:12,065 INFO L225 Difference]: With dead ends: 2878 [2021-05-21 15:41:12,065 INFO L226 Difference]: Without dead ends: 2608 [2021-05-21 15:41:12,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:41:12,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-05-21 15:41:12,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 1741. [2021-05-21 15:41:12,094 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) [2021-05-21 15:41:12,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 4803 transitions. [2021-05-21 15:41:12,097 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 4803 transitions. Word has length 55 [2021-05-21 15:41:12,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:12,097 INFO L482 AbstractCegarLoop]: Abstraction has 1741 states and 4803 transitions. [2021-05-21 15:41:12,097 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) [2021-05-21 15:41:12,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 4803 transitions. [2021-05-21 15:41:12,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 15:41:12,099 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:12,099 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:12,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-21 15:41:12,317 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:12,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:12,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1687206422, now seen corresponding path program 5 times [2021-05-21 15:41:12,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:12,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077909704] [2021-05-21 15:41:12,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:12,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:12,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:12,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077909704] [2021-05-21 15:41:12,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077909704] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:12,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870679296] [2021-05-21 15:41:12,372 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 [2021-05-21 15:41:12,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 15:41:12,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:12,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:41:12,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:12,537 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:12,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870679296] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:12,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:12,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-05-21 15:41:12,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664853080] [2021-05-21 15:41:12,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 15:41:12,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:12,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 15:41:12,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-21 15:41:12,538 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) [2021-05-21 15:41:12,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:12,848 INFO L93 Difference]: Finished difference Result 2821 states and 7531 transitions. [2021-05-21 15:41:12,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 15:41:12,849 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 [2021-05-21 15:41:12,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:12,857 INFO L225 Difference]: With dead ends: 2821 [2021-05-21 15:41:12,857 INFO L226 Difference]: Without dead ends: 2246 [2021-05-21 15:41:12,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 256.9ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:41:12,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-05-21 15:41:12,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 1656. [2021-05-21 15:41:12,883 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) [2021-05-21 15:41:12,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 4519 transitions. [2021-05-21 15:41:12,886 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 4519 transitions. Word has length 55 [2021-05-21 15:41:12,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:12,886 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 4519 transitions. [2021-05-21 15:41:12,886 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) [2021-05-21 15:41:12,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 4519 transitions. [2021-05-21 15:41:12,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 15:41:12,888 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:12,888 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:13,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-21 15:41:13,106 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:13,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:13,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1535924432, now seen corresponding path program 6 times [2021-05-21 15:41:13,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:13,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342665256] [2021-05-21 15:41:13,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:41:13,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:13,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342665256] [2021-05-21 15:41:13,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342665256] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:13,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834026662] [2021-05-21 15:41:13,172 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 [2021-05-21 15:41:13,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 15:41:13,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:13,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:41:13,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:13,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:41:13,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834026662] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:13,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:13,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-05-21 15:41:13,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952688326] [2021-05-21 15:41:13,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 15:41:13,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:13,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 15:41:13,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-21 15:41:13,326 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) [2021-05-21 15:41:13,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:13,465 INFO L93 Difference]: Finished difference Result 2561 states and 6649 transitions. [2021-05-21 15:41:13,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 15:41:13,466 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 [2021-05-21 15:41:13,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:13,469 INFO L225 Difference]: With dead ends: 2561 [2021-05-21 15:41:13,470 INFO L226 Difference]: Without dead ends: 2212 [2021-05-21 15:41:13,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 137.7ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:41:13,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-05-21 15:41:13,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1658. [2021-05-21 15:41:13,493 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) [2021-05-21 15:41:13,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 4523 transitions. [2021-05-21 15:41:13,496 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 4523 transitions. Word has length 55 [2021-05-21 15:41:13,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:13,496 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 4523 transitions. [2021-05-21 15:41:13,496 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) [2021-05-21 15:41:13,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 4523 transitions. [2021-05-21 15:41:13,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 15:41:13,498 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:13,498 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:13,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-21 15:41:13,714 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:13,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:13,714 INFO L82 PathProgramCache]: Analyzing trace with hash 8869516, now seen corresponding path program 7 times [2021-05-21 15:41:13,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:13,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005632999] [2021-05-21 15:41:13,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:13,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:41:13,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:13,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005632999] [2021-05-21 15:41:13,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005632999] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:13,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936818705] [2021-05-21 15:41:13,761 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 [2021-05-21 15:41:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:13,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 15:41:13,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:13,897 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:41:13,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936818705] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:13,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:13,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-21 15:41:13,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291521935] [2021-05-21 15:41:13,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 15:41:13,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:13,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 15:41:13,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 15:41:13,898 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) [2021-05-21 15:41:13,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:13,990 INFO L93 Difference]: Finished difference Result 2311 states and 5957 transitions. [2021-05-21 15:41:13,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 15:41:13,990 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 [2021-05-21 15:41:13,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:13,993 INFO L225 Difference]: With dead ends: 2311 [2021-05-21 15:41:13,994 INFO L226 Difference]: Without dead ends: 2026 [2021-05-21 15:41:13,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:41:13,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2021-05-21 15:41:14,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1638. [2021-05-21 15:41:14,014 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) [2021-05-21 15:41:14,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 4483 transitions. [2021-05-21 15:41:14,017 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 4483 transitions. Word has length 55 [2021-05-21 15:41:14,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:14,017 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 4483 transitions. [2021-05-21 15:41:14,017 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) [2021-05-21 15:41:14,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 4483 transitions. [2021-05-21 15:41:14,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 15:41:14,019 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:14,019 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:14,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:14,235 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:14,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:14,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1697636932, now seen corresponding path program 8 times [2021-05-21 15:41:14,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:14,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887661319] [2021-05-21 15:41:14,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:14,306 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:41:14,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:14,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887661319] [2021-05-21 15:41:14,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887661319] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:14,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045834659] [2021-05-21 15:41:14,307 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 [2021-05-21 15:41:14,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:41:14,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:14,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 15:41:14,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:14,439 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:41:14,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045834659] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:14,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:14,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-05-21 15:41:14,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457761398] [2021-05-21 15:41:14,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 15:41:14,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:14,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 15:41:14,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-21 15:41:14,441 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) [2021-05-21 15:41:14,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:14,580 INFO L93 Difference]: Finished difference Result 2246 states and 5827 transitions. [2021-05-21 15:41:14,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 15:41:14,580 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 [2021-05-21 15:41:14,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:14,583 INFO L225 Difference]: With dead ends: 2246 [2021-05-21 15:41:14,583 INFO L226 Difference]: Without dead ends: 1961 [2021-05-21 15:41:14,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-05-21 15:41:14,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-05-21 15:41:14,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1613. [2021-05-21 15:41:14,606 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) [2021-05-21 15:41:14,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 4433 transitions. [2021-05-21 15:41:14,609 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 4433 transitions. Word has length 55 [2021-05-21 15:41:14,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:14,609 INFO L482 AbstractCegarLoop]: Abstraction has 1613 states and 4433 transitions. [2021-05-21 15:41:14,609 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) [2021-05-21 15:41:14,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 4433 transitions. [2021-05-21 15:41:14,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 15:41:14,611 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:14,611 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:14,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:14,825 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:14,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:14,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1496820963, now seen corresponding path program 9 times [2021-05-21 15:41:14,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:14,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356112077] [2021-05-21 15:41:14,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:14,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:14,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:14,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:14,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356112077] [2021-05-21 15:41:14,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356112077] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:14,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431643903] [2021-05-21 15:41:14,873 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 [2021-05-21 15:41:14,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 15:41:14,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:14,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:41:14,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:15,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431643903] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:15,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:15,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-05-21 15:41:15,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078685128] [2021-05-21 15:41:15,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 15:41:15,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:15,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 15:41:15,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-21 15:41:15,015 INFO L87 Difference]: Start difference. First operand 1613 states and 4433 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:15,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:15,225 INFO L93 Difference]: Finished difference Result 3288 states and 8870 transitions. [2021-05-21 15:41:15,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 15:41:15,226 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 [2021-05-21 15:41:15,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:15,229 INFO L225 Difference]: With dead ends: 3288 [2021-05-21 15:41:15,230 INFO L226 Difference]: Without dead ends: 2476 [2021-05-21 15:41:15,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 171.7ms TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:41:15,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2021-05-21 15:41:15,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 1856. [2021-05-21 15:41:15,254 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) [2021-05-21 15:41:15,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 5069 transitions. [2021-05-21 15:41:15,256 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 5069 transitions. Word has length 55 [2021-05-21 15:41:15,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:15,257 INFO L482 AbstractCegarLoop]: Abstraction has 1856 states and 5069 transitions. [2021-05-21 15:41:15,257 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) [2021-05-21 15:41:15,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 5069 transitions. [2021-05-21 15:41:15,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:41:15,259 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:15,259 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:15,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-21 15:41:15,473 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:15,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:15,473 INFO L82 PathProgramCache]: Analyzing trace with hash -2069953421, now seen corresponding path program 10 times [2021-05-21 15:41:15,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:15,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874228557] [2021-05-21 15:41:15,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:15,553 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:15,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:15,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874228557] [2021-05-21 15:41:15,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874228557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:15,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922646388] [2021-05-21 15:41:15,554 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 [2021-05-21 15:41:15,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:41:15,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:15,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 15:41:15,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:15,731 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:15,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922646388] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:15,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:15,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-05-21 15:41:15,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029033262] [2021-05-21 15:41:15,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 15:41:15,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:15,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 15:41:15,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:41:15,733 INFO L87 Difference]: Start difference. First operand 1856 states and 5069 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:15,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:15,919 INFO L93 Difference]: Finished difference Result 2316 states and 6117 transitions. [2021-05-21 15:41:15,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 15:41:15,919 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 15:41:15,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:15,923 INFO L225 Difference]: With dead ends: 2316 [2021-05-21 15:41:15,923 INFO L226 Difference]: Without dead ends: 2046 [2021-05-21 15:41:15,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 150.7ms TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:41:15,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-05-21 15:41:15,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1931. [2021-05-21 15:41:15,946 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) [2021-05-21 15:41:15,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-05-21 15:41:15,950 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-05-21 15:41:15,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:15,950 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-05-21 15:41:15,950 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) [2021-05-21 15:41:15,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-05-21 15:41:15,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:41:15,953 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:15,953 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:16,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:16,169 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:16,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:16,169 INFO L82 PathProgramCache]: Analyzing trace with hash -423019465, now seen corresponding path program 11 times [2021-05-21 15:41:16,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:16,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968223656] [2021-05-21 15:41:16,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:16,241 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:16,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:16,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968223656] [2021-05-21 15:41:16,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968223656] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:16,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214786524] [2021-05-21 15:41:16,241 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 [2021-05-21 15:41:16,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 15:41:16,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:16,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 15:41:16,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:16,388 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:16,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214786524] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:16,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:16,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-21 15:41:16,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113708004] [2021-05-21 15:41:16,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 15:41:16,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:16,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 15:41:16,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-21 15:41:16,390 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) [2021-05-21 15:41:16,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:16,564 INFO L93 Difference]: Finished difference Result 2481 states and 6447 transitions. [2021-05-21 15:41:16,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 15:41:16,564 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 [2021-05-21 15:41:16,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:16,567 INFO L225 Difference]: With dead ends: 2481 [2021-05-21 15:41:16,567 INFO L226 Difference]: Without dead ends: 2211 [2021-05-21 15:41:16,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 142.0ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:41:16,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-05-21 15:41:16,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 1931. [2021-05-21 15:41:16,590 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) [2021-05-21 15:41:16,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-05-21 15:41:16,593 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-05-21 15:41:16,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:16,594 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-05-21 15:41:16,594 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) [2021-05-21 15:41:16,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-05-21 15:41:16,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:41:16,596 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:16,596 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:16,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-21 15:41:16,809 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:16,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:16,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1607299847, now seen corresponding path program 12 times [2021-05-21 15:41:16,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:16,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213673766] [2021-05-21 15:41:16,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:16,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:16,892 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:16,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:16,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213673766] [2021-05-21 15:41:16,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213673766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:16,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567929646] [2021-05-21 15:41:16,892 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 [2021-05-21 15:41:16,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 15:41:16,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:16,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 15:41:16,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:17,058 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:17,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567929646] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:17,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:17,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-05-21 15:41:17,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466056625] [2021-05-21 15:41:17,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 15:41:17,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:17,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 15:41:17,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:41:17,059 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) [2021-05-21 15:41:17,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:17,267 INFO L93 Difference]: Finished difference Result 2566 states and 6617 transitions. [2021-05-21 15:41:17,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 15:41:17,267 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 [2021-05-21 15:41:17,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:17,270 INFO L225 Difference]: With dead ends: 2566 [2021-05-21 15:41:17,270 INFO L226 Difference]: Without dead ends: 2296 [2021-05-21 15:41:17,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 187.2ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:41:17,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-05-21 15:41:17,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1931. [2021-05-21 15:41:17,312 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) [2021-05-21 15:41:17,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-05-21 15:41:17,315 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-05-21 15:41:17,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:17,315 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-05-21 15:41:17,315 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) [2021-05-21 15:41:17,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-05-21 15:41:17,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:41:17,319 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:17,319 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:17,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:17,535 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:17,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:17,535 INFO L82 PathProgramCache]: Analyzing trace with hash -2073427979, now seen corresponding path program 13 times [2021-05-21 15:41:17,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:17,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234945593] [2021-05-21 15:41:17,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:17,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:17,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:17,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234945593] [2021-05-21 15:41:17,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234945593] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:17,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169598321] [2021-05-21 15:41:17,604 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 [2021-05-21 15:41:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:17,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 15:41:17,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:17,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169598321] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:17,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:17,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-21 15:41:17,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535919697] [2021-05-21 15:41:17,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 15:41:17,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:17,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 15:41:17,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-21 15:41:17,750 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) [2021-05-21 15:41:17,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:17,932 INFO L93 Difference]: Finished difference Result 2496 states and 6477 transitions. [2021-05-21 15:41:17,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 15:41:17,933 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 [2021-05-21 15:41:17,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:17,935 INFO L225 Difference]: With dead ends: 2496 [2021-05-21 15:41:17,935 INFO L226 Difference]: Without dead ends: 2226 [2021-05-21 15:41:17,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 161.2ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:41:17,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-05-21 15:41:17,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1931. [2021-05-21 15:41:17,957 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) [2021-05-21 15:41:17,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-05-21 15:41:17,960 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-05-21 15:41:17,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:17,960 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-05-21 15:41:17,960 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) [2021-05-21 15:41:17,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-05-21 15:41:17,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:41:17,963 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:17,963 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:18,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-21 15:41:18,169 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:18,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:18,169 INFO L82 PathProgramCache]: Analyzing trace with hash 506297029, now seen corresponding path program 14 times [2021-05-21 15:41:18,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:18,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025131739] [2021-05-21 15:41:18,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:18,236 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:18,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:18,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025131739] [2021-05-21 15:41:18,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025131739] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:18,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476963665] [2021-05-21 15:41:18,236 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 [2021-05-21 15:41:18,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:41:18,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:18,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 15:41:18,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:18,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476963665] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:18,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:18,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-05-21 15:41:18,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310245978] [2021-05-21 15:41:18,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 15:41:18,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:18,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 15:41:18,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:41:18,410 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) [2021-05-21 15:41:18,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:18,706 INFO L93 Difference]: Finished difference Result 3074 states and 8103 transitions. [2021-05-21 15:41:18,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 15:41:18,706 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 [2021-05-21 15:41:18,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:18,709 INFO L225 Difference]: With dead ends: 3074 [2021-05-21 15:41:18,709 INFO L226 Difference]: Without dead ends: 2451 [2021-05-21 15:41:18,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 253.8ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:41:18,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-05-21 15:41:18,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1961. [2021-05-21 15:41:18,734 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) [2021-05-21 15:41:18,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 5344 transitions. [2021-05-21 15:41:18,754 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 5344 transitions. Word has length 65 [2021-05-21 15:41:18,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:18,754 INFO L482 AbstractCegarLoop]: Abstraction has 1961 states and 5344 transitions. [2021-05-21 15:41:18,754 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) [2021-05-21 15:41:18,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 5344 transitions. [2021-05-21 15:41:18,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:41:18,756 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:18,757 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:18,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-21 15:41:18,976 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:18,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:18,977 INFO L82 PathProgramCache]: Analyzing trace with hash -526350573, now seen corresponding path program 15 times [2021-05-21 15:41:18,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:18,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712619609] [2021-05-21 15:41:18,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:19,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:19,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712619609] [2021-05-21 15:41:19,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712619609] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:19,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843403293] [2021-05-21 15:41:19,040 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 [2021-05-21 15:41:19,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 15:41:19,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:19,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 15:41:19,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:19,205 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:19,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843403293] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:19,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:19,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-21 15:41:19,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523376444] [2021-05-21 15:41:19,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 15:41:19,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:19,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 15:41:19,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-21 15:41:19,206 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) [2021-05-21 15:41:19,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:19,423 INFO L93 Difference]: Finished difference Result 3278 states and 8771 transitions. [2021-05-21 15:41:19,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 15:41:19,423 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 [2021-05-21 15:41:19,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:19,426 INFO L225 Difference]: With dead ends: 3278 [2021-05-21 15:41:19,426 INFO L226 Difference]: Without dead ends: 3008 [2021-05-21 15:41:19,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 173.1ms TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:41:19,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-05-21 15:41:19,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 2141. [2021-05-21 15:41:19,454 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) [2021-05-21 15:41:19,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 5903 transitions. [2021-05-21 15:41:19,457 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 5903 transitions. Word has length 65 [2021-05-21 15:41:19,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:19,457 INFO L482 AbstractCegarLoop]: Abstraction has 2141 states and 5903 transitions. [2021-05-21 15:41:19,457 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) [2021-05-21 15:41:19,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 5903 transitions. [2021-05-21 15:41:19,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:41:19,460 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:19,460 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:19,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-21 15:41:19,678 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:19,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:19,678 INFO L82 PathProgramCache]: Analyzing trace with hash -504007323, now seen corresponding path program 16 times [2021-05-21 15:41:19,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:19,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999426869] [2021-05-21 15:41:19,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:19,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:19,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999426869] [2021-05-21 15:41:19,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999426869] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:19,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487571373] [2021-05-21 15:41:19,743 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 [2021-05-21 15:41:19,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:41:19,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:19,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 15:41:19,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:19,891 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:19,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487571373] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:19,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:19,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-05-21 15:41:19,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684832628] [2021-05-21 15:41:19,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 15:41:19,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:19,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 15:41:19,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:41:19,893 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) [2021-05-21 15:41:20,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:20,208 INFO L93 Difference]: Finished difference Result 3221 states and 8631 transitions. [2021-05-21 15:41:20,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 15:41:20,208 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 [2021-05-21 15:41:20,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:20,211 INFO L225 Difference]: With dead ends: 3221 [2021-05-21 15:41:20,211 INFO L226 Difference]: Without dead ends: 2646 [2021-05-21 15:41:20,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 271.0ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:41:20,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-05-21 15:41:20,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2056. [2021-05-21 15:41:20,254 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) [2021-05-21 15:41:20,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 5619 transitions. [2021-05-21 15:41:20,258 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 5619 transitions. Word has length 65 [2021-05-21 15:41:20,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:20,258 INFO L482 AbstractCegarLoop]: Abstraction has 2056 states and 5619 transitions. [2021-05-21 15:41:20,258 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) [2021-05-21 15:41:20,258 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 5619 transitions. [2021-05-21 15:41:20,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:41:20,260 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:20,260 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:20,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-21 15:41:20,469 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:20,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:20,469 INFO L82 PathProgramCache]: Analyzing trace with hash 211164831, now seen corresponding path program 17 times [2021-05-21 15:41:20,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:20,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236727485] [2021-05-21 15:41:20,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:41:20,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:20,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236727485] [2021-05-21 15:41:20,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236727485] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:20,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055626829] [2021-05-21 15:41:20,553 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 [2021-05-21 15:41:20,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 15:41:20,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:20,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 15:41:20,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:20,753 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:41:20,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055626829] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:20,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:20,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-05-21 15:41:20,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41700456] [2021-05-21 15:41:20,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:41:20,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:20,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:41:20,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:41:20,755 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) [2021-05-21 15:41:20,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:20,929 INFO L93 Difference]: Finished difference Result 3061 states and 7949 transitions. [2021-05-21 15:41:20,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 15:41:20,929 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 [2021-05-21 15:41:20,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:20,932 INFO L225 Difference]: With dead ends: 3061 [2021-05-21 15:41:20,932 INFO L226 Difference]: Without dead ends: 2712 [2021-05-21 15:41:20,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 176.3ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-05-21 15:41:20,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-05-21 15:41:20,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2058. [2021-05-21 15:41:20,956 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) [2021-05-21 15:41:20,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 5623 transitions. [2021-05-21 15:41:20,959 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 5623 transitions. Word has length 65 [2021-05-21 15:41:20,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:20,959 INFO L482 AbstractCegarLoop]: Abstraction has 2058 states and 5623 transitions. [2021-05-21 15:41:20,959 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) [2021-05-21 15:41:20,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 5623 transitions. [2021-05-21 15:41:20,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:41:20,961 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:20,961 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:21,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:21,177 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:21,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:21,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1649663653, now seen corresponding path program 18 times [2021-05-21 15:41:21,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:21,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712146676] [2021-05-21 15:41:21,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:21,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:21,235 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:41:21,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:21,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712146676] [2021-05-21 15:41:21,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712146676] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:21,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22545566] [2021-05-21 15:41:21,236 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 [2021-05-21 15:41:21,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 15:41:21,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:21,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:41:21,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:21,403 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:41:21,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22545566] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:21,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:21,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-21 15:41:21,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75716303] [2021-05-21 15:41:21,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 15:41:21,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:21,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 15:41:21,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-21 15:41:21,406 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) [2021-05-21 15:41:21,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:21,530 INFO L93 Difference]: Finished difference Result 2861 states and 7357 transitions. [2021-05-21 15:41:21,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 15:41:21,530 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 [2021-05-21 15:41:21,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:21,533 INFO L225 Difference]: With dead ends: 2861 [2021-05-21 15:41:21,533 INFO L226 Difference]: Without dead ends: 2576 [2021-05-21 15:41:21,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-05-21 15:41:21,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-05-21 15:41:21,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 2038. [2021-05-21 15:41:21,556 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) [2021-05-21 15:41:21,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2038 states to 2038 states and 5583 transitions. [2021-05-21 15:41:21,558 INFO L78 Accepts]: Start accepts. Automaton has 2038 states and 5583 transitions. Word has length 65 [2021-05-21 15:41:21,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:21,558 INFO L482 AbstractCegarLoop]: Abstraction has 2038 states and 5583 transitions. [2021-05-21 15:41:21,559 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) [2021-05-21 15:41:21,559 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states and 5583 transitions. [2021-05-21 15:41:21,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:41:21,561 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:21,561 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:21,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:21,777 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:21,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:21,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1345737589, now seen corresponding path program 19 times [2021-05-21 15:41:21,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:21,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202090045] [2021-05-21 15:41:21,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:21,848 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:41:21,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:21,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202090045] [2021-05-21 15:41:21,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202090045] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:21,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324123757] [2021-05-21 15:41:21,848 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 [2021-05-21 15:41:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:21,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:41:21,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:41:22,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324123757] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:22,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:22,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-05-21 15:41:22,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351267894] [2021-05-21 15:41:22,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 15:41:22,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:22,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 15:41:22,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-21 15:41:22,010 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) [2021-05-21 15:41:22,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:22,195 INFO L93 Difference]: Finished difference Result 2796 states and 7227 transitions. [2021-05-21 15:41:22,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 15:41:22,195 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 [2021-05-21 15:41:22,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:22,198 INFO L225 Difference]: With dead ends: 2796 [2021-05-21 15:41:22,198 INFO L226 Difference]: Without dead ends: 2511 [2021-05-21 15:41:22,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 162.4ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:41:22,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2021-05-21 15:41:22,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2013. [2021-05-21 15:41:22,222 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) [2021-05-21 15:41:22,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 5533 transitions. [2021-05-21 15:41:22,225 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 5533 transitions. Word has length 65 [2021-05-21 15:41:22,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:22,226 INFO L482 AbstractCegarLoop]: Abstraction has 2013 states and 5533 transitions. [2021-05-21 15:41:22,226 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) [2021-05-21 15:41:22,226 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 5533 transitions. [2021-05-21 15:41:22,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:41:22,228 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:22,228 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:22,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-21 15:41:22,444 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:22,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:22,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1991900067, now seen corresponding path program 20 times [2021-05-21 15:41:22,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:22,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466969126] [2021-05-21 15:41:22,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:41:22,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:22,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466969126] [2021-05-21 15:41:22,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466969126] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:22,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898237950] [2021-05-21 15:41:22,498 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 [2021-05-21 15:41:22,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:41:22,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:22,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:41:22,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:22,625 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:41:22,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898237950] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:22,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:22,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-21 15:41:22,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174376898] [2021-05-21 15:41:22,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 15:41:22,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:22,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 15:41:22,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-21 15:41:22,626 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) [2021-05-21 15:41:22,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:22,765 INFO L93 Difference]: Finished difference Result 2721 states and 7077 transitions. [2021-05-21 15:41:22,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 15:41:22,766 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 [2021-05-21 15:41:22,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:22,768 INFO L225 Difference]: With dead ends: 2721 [2021-05-21 15:41:22,768 INFO L226 Difference]: Without dead ends: 2436 [2021-05-21 15:41:22,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:41:22,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-05-21 15:41:22,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1988. [2021-05-21 15:41:22,790 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) [2021-05-21 15:41:22,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 5483 transitions. [2021-05-21 15:41:22,793 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 5483 transitions. Word has length 65 [2021-05-21 15:41:22,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:22,793 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 5483 transitions. [2021-05-21 15:41:22,793 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) [2021-05-21 15:41:22,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 5483 transitions. [2021-05-21 15:41:22,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:41:22,795 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:22,795 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:23,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:23,011 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:23,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:23,011 INFO L82 PathProgramCache]: Analyzing trace with hash 596560781, now seen corresponding path program 21 times [2021-05-21 15:41:23,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:23,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234827586] [2021-05-21 15:41:23,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:23,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:23,072 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:41:23,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:23,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234827586] [2021-05-21 15:41:23,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234827586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:23,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099449147] [2021-05-21 15:41:23,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 15:41:23,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 15:41:23,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:23,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:41:23,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:23,236 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:41:23,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099449147] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:23,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:23,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-05-21 15:41:23,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732768677] [2021-05-21 15:41:23,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 15:41:23,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:23,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 15:41:23,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-21 15:41:23,237 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) [2021-05-21 15:41:23,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:23,438 INFO L93 Difference]: Finished difference Result 2646 states and 6927 transitions. [2021-05-21 15:41:23,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 15:41:23,438 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 [2021-05-21 15:41:23,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:23,441 INFO L225 Difference]: With dead ends: 2646 [2021-05-21 15:41:23,441 INFO L226 Difference]: Without dead ends: 2361 [2021-05-21 15:41:23,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 184.0ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-05-21 15:41:23,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-05-21 15:41:23,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 1963. [2021-05-21 15:41:23,459 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) [2021-05-21 15:41:23,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 5433 transitions. [2021-05-21 15:41:23,462 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 5433 transitions. Word has length 65 [2021-05-21 15:41:23,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:23,462 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 5433 transitions. [2021-05-21 15:41:23,462 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) [2021-05-21 15:41:23,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 5433 transitions. [2021-05-21 15:41:23,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:41:23,464 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:23,464 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:23,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-21 15:41:23,678 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:23,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:23,678 INFO L82 PathProgramCache]: Analyzing trace with hash 797376750, now seen corresponding path program 22 times [2021-05-21 15:41:23,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:23,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663041842] [2021-05-21 15:41:23,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:23,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:23,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663041842] [2021-05-21 15:41:23,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663041842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:23,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435588423] [2021-05-21 15:41:23,738 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 [2021-05-21 15:41:23,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:41:23,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:23,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 15:41:23,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:23,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435588423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:23,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:23,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-21 15:41:23,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378178664] [2021-05-21 15:41:23,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 15:41:23,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:23,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 15:41:23,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-21 15:41:23,890 INFO L87 Difference]: Start difference. First operand 1963 states and 5433 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:24,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:24,162 INFO L93 Difference]: Finished difference Result 3055 states and 8279 transitions. [2021-05-21 15:41:24,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 15:41:24,163 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 [2021-05-21 15:41:24,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:24,165 INFO L225 Difference]: With dead ends: 3055 [2021-05-21 15:41:24,165 INFO L226 Difference]: Without dead ends: 2446 [2021-05-21 15:41:24,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 208.5ms TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:41:24,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2021-05-21 15:41:24,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2028. [2021-05-21 15:41:24,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.8036507153428714) internal successors, (5683), 2027 states have internal predecessors, (5683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:24,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5683 transitions. [2021-05-21 15:41:24,189 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5683 transitions. Word has length 65 [2021-05-21 15:41:24,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:24,189 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5683 transitions. [2021-05-21 15:41:24,189 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) [2021-05-21 15:41:24,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5683 transitions. [2021-05-21 15:41:24,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-21 15:41:24,191 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:24,191 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:24,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-21 15:41:24,407 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:24,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:24,407 INFO L82 PathProgramCache]: Analyzing trace with hash 2053970119, now seen corresponding path program 23 times [2021-05-21 15:41:24,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:24,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237486568] [2021-05-21 15:41:24,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:24,503 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:24,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:24,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237486568] [2021-05-21 15:41:24,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237486568] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:24,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631807104] [2021-05-21 15:41:24,503 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 [2021-05-21 15:41:24,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 15:41:24,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:24,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 15:41:24,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:24,690 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:24,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631807104] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:24,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:24,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-05-21 15:41:24,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059003624] [2021-05-21 15:41:24,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:41:24,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:24,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:41:24,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:41:24,691 INFO L87 Difference]: Start difference. First operand 2028 states and 5683 transitions. Second operand has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:24,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:24,907 INFO L93 Difference]: Finished difference Result 2868 states and 7683 transitions. [2021-05-21 15:41:24,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 15:41:24,908 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-05-21 15:41:24,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:24,910 INFO L225 Difference]: With dead ends: 2868 [2021-05-21 15:41:24,910 INFO L226 Difference]: Without dead ends: 2534 [2021-05-21 15:41:24,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 212.7ms TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:41:24,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-05-21 15:41:24,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 2113. [2021-05-21 15:41:24,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 2.7713068181818183) internal successors, (5853), 2112 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:24,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 5853 transitions. [2021-05-21 15:41:24,936 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 5853 transitions. Word has length 70 [2021-05-21 15:41:24,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:24,936 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 5853 transitions. [2021-05-21 15:41:24,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:24,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 5853 transitions. [2021-05-21 15:41:24,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-21 15:41:24,939 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:24,939 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:25,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-21 15:41:25,153 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:25,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:25,153 INFO L82 PathProgramCache]: Analyzing trace with hash -778605685, now seen corresponding path program 24 times [2021-05-21 15:41:25,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:25,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800311021] [2021-05-21 15:41:25,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:25,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:25,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:25,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800311021] [2021-05-21 15:41:25,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800311021] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:25,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335566991] [2021-05-21 15:41:25,229 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 [2021-05-21 15:41:25,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 15:41:25,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:25,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 15:41:25,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:25,394 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:25,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335566991] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:25,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:25,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-21 15:41:25,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128318909] [2021-05-21 15:41:25,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 15:41:25,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:25,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 15:41:25,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:41:25,395 INFO L87 Difference]: Start difference. First operand 2113 states and 5853 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:25,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:25,534 INFO L93 Difference]: Finished difference Result 3061 states and 7877 transitions. [2021-05-21 15:41:25,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 15:41:25,534 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-05-21 15:41:25,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:25,537 INFO L225 Difference]: With dead ends: 3061 [2021-05-21 15:41:25,537 INFO L226 Difference]: Without dead ends: 2791 [2021-05-21 15:41:25,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 141.3ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:41:25,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-05-21 15:41:25,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2128. [2021-05-21 15:41:25,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:25,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-05-21 15:41:25,560 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-05-21 15:41:25,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:25,560 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-05-21 15:41:25,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:25,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-05-21 15:41:25,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-21 15:41:25,562 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:25,562 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:25,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-21 15:41:25,773 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:25,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:25,773 INFO L82 PathProgramCache]: Analyzing trace with hash 220290651, now seen corresponding path program 25 times [2021-05-21 15:41:25,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:25,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367538125] [2021-05-21 15:41:25,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:25,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:25,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367538125] [2021-05-21 15:41:25,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367538125] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:25,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682913591] [2021-05-21 15:41:25,869 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 [2021-05-21 15:41:25,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:25,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 15:41:25,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:26,026 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:26,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682913591] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:26,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:26,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-05-21 15:41:26,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600031051] [2021-05-21 15:41:26,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:41:26,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:26,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:41:26,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:41:26,027 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:26,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:26,238 INFO L93 Difference]: Finished difference Result 2946 states and 7647 transitions. [2021-05-21 15:41:26,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 15:41:26,239 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-05-21 15:41:26,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:26,241 INFO L225 Difference]: With dead ends: 2946 [2021-05-21 15:41:26,241 INFO L226 Difference]: Without dead ends: 2676 [2021-05-21 15:41:26,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 221.3ms TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:41:26,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-05-21 15:41:26,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 2128. [2021-05-21 15:41:26,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:26,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-05-21 15:41:26,265 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-05-21 15:41:26,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:26,265 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-05-21 15:41:26,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:26,265 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-05-21 15:41:26,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-21 15:41:26,267 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:26,267 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:26,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-21 15:41:26,469 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:26,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:26,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1659037239, now seen corresponding path program 26 times [2021-05-21 15:41:26,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:26,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879913235] [2021-05-21 15:41:26,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:26,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:26,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879913235] [2021-05-21 15:41:26,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879913235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:26,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418306667] [2021-05-21 15:41:26,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 15:41:26,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:41:26,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:26,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 15:41:26,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:26,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418306667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:26,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:26,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-21 15:41:26,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678596151] [2021-05-21 15:41:26,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 15:41:26,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:26,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 15:41:26,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:41:26,719 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:26,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:26,887 INFO L93 Difference]: Finished difference Result 2921 states and 7597 transitions. [2021-05-21 15:41:26,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 15:41:26,887 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-05-21 15:41:26,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:26,890 INFO L225 Difference]: With dead ends: 2921 [2021-05-21 15:41:26,890 INFO L226 Difference]: Without dead ends: 2651 [2021-05-21 15:41:26,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 177.2ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-05-21 15:41:26,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2021-05-21 15:41:26,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2128. [2021-05-21 15:41:26,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:26,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-05-21 15:41:26,911 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-05-21 15:41:26,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:26,911 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-05-21 15:41:26,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:26,911 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-05-21 15:41:26,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-21 15:41:26,913 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:26,913 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:27,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:27,129 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:27,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:27,129 INFO L82 PathProgramCache]: Analyzing trace with hash 371282073, now seen corresponding path program 27 times [2021-05-21 15:41:27,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:27,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384773852] [2021-05-21 15:41:27,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:27,210 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:27,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:27,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384773852] [2021-05-21 15:41:27,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384773852] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:27,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736323038] [2021-05-21 15:41:27,211 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 [2021-05-21 15:41:27,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 15:41:27,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:27,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 15:41:27,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:27,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736323038] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:27,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:27,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-05-21 15:41:27,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206820314] [2021-05-21 15:41:27,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:41:27,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:27,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:41:27,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:41:27,362 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:27,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:27,632 INFO L93 Difference]: Finished difference Result 2871 states and 7497 transitions. [2021-05-21 15:41:27,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 15:41:27,632 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-05-21 15:41:27,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:27,635 INFO L225 Difference]: With dead ends: 2871 [2021-05-21 15:41:27,635 INFO L226 Difference]: Without dead ends: 2601 [2021-05-21 15:41:27,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 248.4ms TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:41:27,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-05-21 15:41:27,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2128. [2021-05-21 15:41:27,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:27,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-05-21 15:41:27,657 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-05-21 15:41:27,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:27,658 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-05-21 15:41:27,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:27,658 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-05-21 15:41:27,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-21 15:41:27,660 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:27,660 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:27,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:27,873 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:27,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:27,873 INFO L82 PathProgramCache]: Analyzing trace with hash 985521543, now seen corresponding path program 28 times [2021-05-21 15:41:27,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:27,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604332592] [2021-05-21 15:41:27,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:27,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:27,937 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:27,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:27,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604332592] [2021-05-21 15:41:27,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604332592] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:27,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033426936] [2021-05-21 15:41:27,937 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 [2021-05-21 15:41:27,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:41:27,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:27,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 15:41:27,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:28,069 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:28,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033426936] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:28,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:28,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-21 15:41:28,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889726467] [2021-05-21 15:41:28,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 15:41:28,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:28,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 15:41:28,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:41:28,071 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:28,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:28,269 INFO L93 Difference]: Finished difference Result 2821 states and 7397 transitions. [2021-05-21 15:41:28,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 15:41:28,269 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-05-21 15:41:28,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:28,272 INFO L225 Difference]: With dead ends: 2821 [2021-05-21 15:41:28,272 INFO L226 Difference]: Without dead ends: 2551 [2021-05-21 15:41:28,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:41:28,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2021-05-21 15:41:28,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 2128. [2021-05-21 15:41:28,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:28,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-05-21 15:41:28,294 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-05-21 15:41:28,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:28,294 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-05-21 15:41:28,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:28,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-05-21 15:41:28,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-21 15:41:28,296 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:28,296 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:28,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-05-21 15:41:28,497 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:28,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:28,500 INFO L82 PathProgramCache]: Analyzing trace with hash -729720745, now seen corresponding path program 29 times [2021-05-21 15:41:28,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:28,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391609489] [2021-05-21 15:41:28,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:28,568 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:28,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:28,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391609489] [2021-05-21 15:41:28,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391609489] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:28,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407970415] [2021-05-21 15:41:28,568 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 [2021-05-21 15:41:28,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 15:41:28,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:28,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 15:41:28,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:28,710 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:28,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407970415] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:28,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:28,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-05-21 15:41:28,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496077884] [2021-05-21 15:41:28,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:41:28,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:28,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:41:28,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:41:28,711 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:28,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:28,995 INFO L93 Difference]: Finished difference Result 2831 states and 7447 transitions. [2021-05-21 15:41:28,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 15:41:28,996 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-05-21 15:41:28,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:28,998 INFO L225 Difference]: With dead ends: 2831 [2021-05-21 15:41:28,998 INFO L226 Difference]: Without dead ends: 2561 [2021-05-21 15:41:28,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 253.2ms TimeCoverageRelationStatistics Valid=267, Invalid=789, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:41:29,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2021-05-21 15:41:29,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 2128. [2021-05-21 15:41:29,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.768218147625764) internal successors, (5888), 2127 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:29,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5888 transitions. [2021-05-21 15:41:29,021 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5888 transitions. Word has length 70 [2021-05-21 15:41:29,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:29,021 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5888 transitions. [2021-05-21 15:41:29,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:29,021 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5888 transitions. [2021-05-21 15:41:29,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-21 15:41:29,023 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:29,023 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:29,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:29,237 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:29,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:29,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1762368347, now seen corresponding path program 30 times [2021-05-21 15:41:29,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:29,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906131433] [2021-05-21 15:41:29,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:29,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:29,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906131433] [2021-05-21 15:41:29,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906131433] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:29,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437797532] [2021-05-21 15:41:29,322 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 [2021-05-21 15:41:29,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 15:41:29,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:29,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 15:41:29,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:29,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437797532] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:29,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:29,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-21 15:41:29,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566319988] [2021-05-21 15:41:29,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 15:41:29,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:29,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 15:41:29,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:41:29,457 INFO L87 Difference]: Start difference. First operand 2128 states and 5888 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:29,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:29,696 INFO L93 Difference]: Finished difference Result 3598 states and 9621 transitions. [2021-05-21 15:41:29,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 15:41:29,696 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-05-21 15:41:29,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:29,700 INFO L225 Difference]: With dead ends: 3598 [2021-05-21 15:41:29,700 INFO L226 Difference]: Without dead ends: 3328 [2021-05-21 15:41:29,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 213.7ms TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:41:29,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2021-05-21 15:41:29,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 2308. [2021-05-21 15:41:29,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2308 states, 2307 states have (on average 2.7945383615084527) internal successors, (6447), 2307 states have internal predecessors, (6447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:29,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 6447 transitions. [2021-05-21 15:41:29,730 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 6447 transitions. Word has length 70 [2021-05-21 15:41:29,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:29,730 INFO L482 AbstractCegarLoop]: Abstraction has 2308 states and 6447 transitions. [2021-05-21 15:41:29,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:29,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 6447 transitions. [2021-05-21 15:41:29,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-21 15:41:29,732 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:29,733 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:29,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-21 15:41:29,948 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:29,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:29,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1740025097, now seen corresponding path program 31 times [2021-05-21 15:41:29,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:29,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495754616] [2021-05-21 15:41:29,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:30,017 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:30,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:30,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495754616] [2021-05-21 15:41:30,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495754616] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:30,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922694736] [2021-05-21 15:41:30,017 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 [2021-05-21 15:41:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:30,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 15:41:30,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:30,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922694736] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:30,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:30,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-05-21 15:41:30,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886312996] [2021-05-21 15:41:30,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:41:30,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:30,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:41:30,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:41:30,179 INFO L87 Difference]: Start difference. First operand 2308 states and 6447 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:30,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:30,545 INFO L93 Difference]: Finished difference Result 3421 states and 9121 transitions. [2021-05-21 15:41:30,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 15:41:30,546 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-05-21 15:41:30,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:30,548 INFO L225 Difference]: With dead ends: 3421 [2021-05-21 15:41:30,549 INFO L226 Difference]: Without dead ends: 2846 [2021-05-21 15:41:30,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 311.9ms TimeCoverageRelationStatistics Valid=357, Invalid=1049, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 15:41:30,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-05-21 15:41:30,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 1803. [2021-05-21 15:41:30,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1802 states have (on average 2.7291897891231964) internal successors, (4918), 1802 states have internal predecessors, (4918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:30,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 4918 transitions. [2021-05-21 15:41:30,574 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 4918 transitions. Word has length 70 [2021-05-21 15:41:30,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:30,574 INFO L482 AbstractCegarLoop]: Abstraction has 1803 states and 4918 transitions. [2021-05-21 15:41:30,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:30,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 4918 transitions. [2021-05-21 15:41:30,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:41:30,577 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:30,577 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:30,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:30,793 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:30,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:30,793 INFO L82 PathProgramCache]: Analyzing trace with hash 751678088, now seen corresponding path program 32 times [2021-05-21 15:41:30,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:30,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458611424] [2021-05-21 15:41:30,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:30,877 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:30,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:30,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458611424] [2021-05-21 15:41:30,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458611424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:30,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323727786] [2021-05-21 15:41:30,878 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 [2021-05-21 15:41:30,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:41:30,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:30,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 15:41:30,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:31,048 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:31,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323727786] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:31,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:31,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-21 15:41:31,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764057323] [2021-05-21 15:41:31,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:41:31,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:31,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:41:31,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:41:31,050 INFO L87 Difference]: Start difference. First operand 1803 states and 4918 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:31,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:31,231 INFO L93 Difference]: Finished difference Result 2621 states and 6757 transitions. [2021-05-21 15:41:31,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 15:41:31,231 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 [2021-05-21 15:41:31,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:31,234 INFO L225 Difference]: With dead ends: 2621 [2021-05-21 15:41:31,234 INFO L226 Difference]: Without dead ends: 2351 [2021-05-21 15:41:31,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 175.4ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:41:31,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-05-21 15:41:31,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1878. [2021-05-21 15:41:31,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 2.7400106553010124) internal successors, (5143), 1877 states have internal predecessors, (5143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:31,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 5143 transitions. [2021-05-21 15:41:31,253 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 5143 transitions. Word has length 75 [2021-05-21 15:41:31,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:31,253 INFO L482 AbstractCegarLoop]: Abstraction has 1878 states and 5143 transitions. [2021-05-21 15:41:31,254 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) [2021-05-21 15:41:31,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 5143 transitions. [2021-05-21 15:41:31,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:41:31,255 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:31,255 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:31,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-21 15:41:31,456 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:31,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:31,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1750574424, now seen corresponding path program 33 times [2021-05-21 15:41:31,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:31,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329837826] [2021-05-21 15:41:31,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:31,535 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:31,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:31,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329837826] [2021-05-21 15:41:31,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329837826] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:31,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170182659] [2021-05-21 15:41:31,536 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 [2021-05-21 15:41:31,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 15:41:31,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:31,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 15:41:31,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:31,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170182659] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:31,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:31,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-05-21 15:41:31,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908572049] [2021-05-21 15:41:31,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:41:31,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:31,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:41:31,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:41:31,689 INFO L87 Difference]: Start difference. First operand 1878 states and 5143 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:31,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:31,911 INFO L93 Difference]: Finished difference Result 2841 states and 7272 transitions. [2021-05-21 15:41:31,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 15:41:31,911 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 15:41:31,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:31,913 INFO L225 Difference]: With dead ends: 2841 [2021-05-21 15:41:31,913 INFO L226 Difference]: Without dead ends: 2571 [2021-05-21 15:41:31,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 217.8ms TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:41:31,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-05-21 15:41:31,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 1953. [2021-05-21 15:41:31,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 2.75) internal successors, (5368), 1952 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:31,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 5368 transitions. [2021-05-21 15:41:31,934 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 5368 transitions. Word has length 75 [2021-05-21 15:41:31,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:31,934 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 5368 transitions. [2021-05-21 15:41:31,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:31,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 5368 transitions. [2021-05-21 15:41:31,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:41:31,936 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:31,936 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:32,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-21 15:41:32,152 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:32,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:32,152 INFO L82 PathProgramCache]: Analyzing trace with hash -128753466, now seen corresponding path program 34 times [2021-05-21 15:41:32,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:32,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579043758] [2021-05-21 15:41:32,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:32,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:32,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579043758] [2021-05-21 15:41:32,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579043758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:32,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435768414] [2021-05-21 15:41:32,244 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 [2021-05-21 15:41:32,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:41:32,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:32,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 15:41:32,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:32,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435768414] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:32,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:32,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-21 15:41:32,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500785391] [2021-05-21 15:41:32,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:41:32,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:32,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:41:32,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:41:32,380 INFO L87 Difference]: Start difference. First operand 1953 states and 5368 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:32,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:32,594 INFO L93 Difference]: Finished difference Result 2871 states and 7407 transitions. [2021-05-21 15:41:32,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 15:41:32,594 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 [2021-05-21 15:41:32,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:32,596 INFO L225 Difference]: With dead ends: 2871 [2021-05-21 15:41:32,597 INFO L226 Difference]: Without dead ends: 2601 [2021-05-21 15:41:32,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 204.7ms TimeCoverageRelationStatistics Valid=248, Invalid=744, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:41:32,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-05-21 15:41:32,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2028. [2021-05-21 15:41:32,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.759250123334978) internal successors, (5593), 2027 states have internal predecessors, (5593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:32,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5593 transitions. [2021-05-21 15:41:32,618 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5593 transitions. Word has length 75 [2021-05-21 15:41:32,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:32,619 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5593 transitions. [2021-05-21 15:41:32,619 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) [2021-05-21 15:41:32,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5593 transitions. [2021-05-21 15:41:32,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:41:32,621 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:32,621 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:32,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-21 15:41:32,836 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:32,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:32,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1901565846, now seen corresponding path program 35 times [2021-05-21 15:41:32,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:32,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851800053] [2021-05-21 15:41:32,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:32,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:32,918 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:32,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:32,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851800053] [2021-05-21 15:41:32,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851800053] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:32,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698439595] [2021-05-21 15:41:32,918 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 [2021-05-21 15:41:32,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 15:41:32,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:32,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 15:41:32,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:33,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698439595] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:33,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:33,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-05-21 15:41:33,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230203285] [2021-05-21 15:41:33,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:41:33,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:33,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:41:33,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:41:33,077 INFO L87 Difference]: Start difference. First operand 2028 states and 5593 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:33,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:33,352 INFO L93 Difference]: Finished difference Result 2896 states and 7532 transitions. [2021-05-21 15:41:33,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 15:41:33,352 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 15:41:33,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:33,355 INFO L225 Difference]: With dead ends: 2896 [2021-05-21 15:41:33,355 INFO L226 Difference]: Without dead ends: 2626 [2021-05-21 15:41:33,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 259.2ms TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:41:33,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-05-21 15:41:33,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 2103. [2021-05-21 15:41:33,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2103 states, 2102 states have (on average 2.7678401522359657) internal successors, (5818), 2102 states have internal predecessors, (5818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:33,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 5818 transitions. [2021-05-21 15:41:33,379 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 5818 transitions. Word has length 75 [2021-05-21 15:41:33,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:33,388 INFO L482 AbstractCegarLoop]: Abstraction has 2103 states and 5818 transitions. [2021-05-21 15:41:33,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:33,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 5818 transitions. [2021-05-21 15:41:33,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:41:33,390 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:33,390 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:33,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-21 15:41:33,605 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:33,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:33,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1779161980, now seen corresponding path program 36 times [2021-05-21 15:41:33,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:33,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726833601] [2021-05-21 15:41:33,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:33,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:33,679 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:33,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:33,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726833601] [2021-05-21 15:41:33,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726833601] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:33,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848040665] [2021-05-21 15:41:33,680 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 [2021-05-21 15:41:33,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 15:41:33,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:33,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 15:41:33,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:33,873 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:33,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848040665] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:33,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:33,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-21 15:41:33,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992655893] [2021-05-21 15:41:33,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:41:33,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:33,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:41:33,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:41:33,874 INFO L87 Difference]: Start difference. First operand 2103 states and 5818 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:34,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:34,118 INFO L93 Difference]: Finished difference Result 2966 states and 7777 transitions. [2021-05-21 15:41:34,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 15:41:34,119 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 [2021-05-21 15:41:34,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:34,121 INFO L225 Difference]: With dead ends: 2966 [2021-05-21 15:41:34,122 INFO L226 Difference]: Without dead ends: 2696 [2021-05-21 15:41:34,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 219.4ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:41:34,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-05-21 15:41:34,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2178. [2021-05-21 15:41:34,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2177 states have (on average 2.782728525493799) internal successors, (6058), 2177 states have internal predecessors, (6058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:34,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 6058 transitions. [2021-05-21 15:41:34,153 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 6058 transitions. Word has length 75 [2021-05-21 15:41:34,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:34,154 INFO L482 AbstractCegarLoop]: Abstraction has 2178 states and 6058 transitions. [2021-05-21 15:41:34,154 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) [2021-05-21 15:41:34,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 6058 transitions. [2021-05-21 15:41:34,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:41:34,156 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:34,156 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:34,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:34,361 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:34,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:34,361 INFO L82 PathProgramCache]: Analyzing trace with hash 800563028, now seen corresponding path program 37 times [2021-05-21 15:41:34,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:34,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734711319] [2021-05-21 15:41:34,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:34,450 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:34,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:34,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734711319] [2021-05-21 15:41:34,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734711319] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:34,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208252724] [2021-05-21 15:41:34,450 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 [2021-05-21 15:41:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:34,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 15:41:34,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:34,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208252724] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:34,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:34,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-05-21 15:41:34,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429659089] [2021-05-21 15:41:34,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:41:34,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:34,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:41:34,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:41:34,598 INFO L87 Difference]: Start difference. First operand 2178 states and 6058 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:34,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:34,977 INFO L93 Difference]: Finished difference Result 3544 states and 9403 transitions. [2021-05-21 15:41:34,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 15:41:34,977 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 15:41:34,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:34,980 INFO L225 Difference]: With dead ends: 3544 [2021-05-21 15:41:34,980 INFO L226 Difference]: Without dead ends: 2921 [2021-05-21 15:41:34,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 309.1ms TimeCoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 15:41:34,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-05-21 15:41:35,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2253. [2021-05-21 15:41:35,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7921847246891653) internal successors, (6288), 2252 states have internal predecessors, (6288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:35,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6288 transitions. [2021-05-21 15:41:35,007 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6288 transitions. Word has length 75 [2021-05-21 15:41:35,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:35,007 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6288 transitions. [2021-05-21 15:41:35,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:35,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6288 transitions. [2021-05-21 15:41:35,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:41:35,009 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:35,009 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:35,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:35,217 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:35,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:35,217 INFO L82 PathProgramCache]: Analyzing trace with hash -232084574, now seen corresponding path program 38 times [2021-05-21 15:41:35,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:35,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144151845] [2021-05-21 15:41:35,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:35,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:35,353 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:35,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:35,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144151845] [2021-05-21 15:41:35,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144151845] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:35,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463023111] [2021-05-21 15:41:35,353 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 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 [2021-05-21 15:41:35,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:41:35,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:35,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 15:41:35,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:35,530 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:35,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463023111] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:35,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:35,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-21 15:41:35,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151106963] [2021-05-21 15:41:35,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:41:35,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:35,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:41:35,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:41:35,532 INFO L87 Difference]: Start difference. First operand 2253 states and 6288 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:35,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:35,809 INFO L93 Difference]: Finished difference Result 3748 states and 10071 transitions. [2021-05-21 15:41:35,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 15:41:35,809 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 [2021-05-21 15:41:35,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:35,813 INFO L225 Difference]: With dead ends: 3748 [2021-05-21 15:41:35,813 INFO L226 Difference]: Without dead ends: 3478 [2021-05-21 15:41:35,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 247.0ms TimeCoverageRelationStatistics Valid=355, Invalid=905, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:41:35,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-05-21 15:41:35,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 2433. [2021-05-21 15:41:35,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 2432 states have (on average 2.815378289473684) internal successors, (6847), 2432 states have internal predecessors, (6847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:35,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 6847 transitions. [2021-05-21 15:41:35,839 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 6847 transitions. Word has length 75 [2021-05-21 15:41:35,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:35,840 INFO L482 AbstractCegarLoop]: Abstraction has 2433 states and 6847 transitions. [2021-05-21 15:41:35,840 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) [2021-05-21 15:41:35,840 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 6847 transitions. [2021-05-21 15:41:35,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:41:35,841 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:35,841 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:36,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:36,042 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:36,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:36,042 INFO L82 PathProgramCache]: Analyzing trace with hash -209741324, now seen corresponding path program 39 times [2021-05-21 15:41:36,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:36,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505163375] [2021-05-21 15:41:36,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:36,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:36,128 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:36,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:36,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505163375] [2021-05-21 15:41:36,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505163375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:36,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455591987] [2021-05-21 15:41:36,128 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 [2021-05-21 15:41:36,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 15:41:36,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:36,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 15:41:36,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:36,270 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:36,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455591987] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:36,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:36,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-21 15:41:36,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101766791] [2021-05-21 15:41:36,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:41:36,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:36,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:41:36,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:41:36,272 INFO L87 Difference]: Start difference. First operand 2433 states and 6847 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:36,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:36,618 INFO L93 Difference]: Finished difference Result 3210 states and 8721 transitions. [2021-05-21 15:41:36,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 15:41:36,618 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 [2021-05-21 15:41:36,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:36,621 INFO L225 Difference]: With dead ends: 3210 [2021-05-21 15:41:36,621 INFO L226 Difference]: Without dead ends: 2721 [2021-05-21 15:41:36,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 317.4ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 15:41:36,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2021-05-21 15:41:36,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2378. [2021-05-21 15:41:36,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.8115271350441735) internal successors, (6683), 2377 states have internal predecessors, (6683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:36,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6683 transitions. [2021-05-21 15:41:36,644 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6683 transitions. Word has length 75 [2021-05-21 15:41:36,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:36,645 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6683 transitions. [2021-05-21 15:41:36,645 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) [2021-05-21 15:41:36,645 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6683 transitions. [2021-05-21 15:41:36,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:41:36,646 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:36,646 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:36,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:36,848 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:36,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:36,848 INFO L82 PathProgramCache]: Analyzing trace with hash 452139800, now seen corresponding path program 40 times [2021-05-21 15:41:36,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:36,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673382504] [2021-05-21 15:41:36,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:36,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:36,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:36,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673382504] [2021-05-21 15:41:36,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673382504] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:36,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204367146] [2021-05-21 15:41:36,977 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 [2021-05-21 15:41:37,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:41:37,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:37,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 15:41:37,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:37,161 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:37,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204367146] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:37,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:37,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-05-21 15:41:37,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157310965] [2021-05-21 15:41:37,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:41:37,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:37,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:41:37,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:41:37,162 INFO L87 Difference]: Start difference. First operand 2378 states and 6683 transitions. Second operand has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:37,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:37,358 INFO L93 Difference]: Finished difference Result 2948 states and 7951 transitions. [2021-05-21 15:41:37,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 15:41:37,359 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:41:37,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:37,362 INFO L225 Difference]: With dead ends: 2948 [2021-05-21 15:41:37,362 INFO L226 Difference]: Without dead ends: 2678 [2021-05-21 15:41:37,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 226.1ms TimeCoverageRelationStatistics Valid=260, Invalid=732, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:41:37,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2021-05-21 15:41:37,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 2463. [2021-05-21 15:41:37,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 2.7835093419983754) internal successors, (6853), 2462 states have internal predecessors, (6853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:37,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 6853 transitions. [2021-05-21 15:41:37,387 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 6853 transitions. Word has length 80 [2021-05-21 15:41:37,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:37,387 INFO L482 AbstractCegarLoop]: Abstraction has 2463 states and 6853 transitions. [2021-05-21 15:41:37,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:37,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 6853 transitions. [2021-05-21 15:41:37,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:41:37,389 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:37,389 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:37,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-05-21 15:41:37,590 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:37,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:37,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1173866716, now seen corresponding path program 41 times [2021-05-21 15:41:37,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:37,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341753586] [2021-05-21 15:41:37,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:37,692 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:37,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:37,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341753586] [2021-05-21 15:41:37,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341753586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:37,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117961268] [2021-05-21 15:41:37,692 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 [2021-05-21 15:41:37,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 15:41:37,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:37,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 15:41:37,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:37,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117961268] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:37,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:37,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-05-21 15:41:37,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733183816] [2021-05-21 15:41:37,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:41:37,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:37,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:41:37,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:41:37,853 INFO L87 Difference]: Start difference. First operand 2463 states and 6853 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:38,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:38,006 INFO L93 Difference]: Finished difference Result 3561 states and 9177 transitions. [2021-05-21 15:41:38,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 15:41:38,006 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:41:38,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:38,010 INFO L225 Difference]: With dead ends: 3561 [2021-05-21 15:41:38,011 INFO L226 Difference]: Without dead ends: 3291 [2021-05-21 15:41:38,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 160.7ms TimeCoverageRelationStatistics Valid=196, Invalid=560, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:41:38,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3291 states. [2021-05-21 15:41:38,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3291 to 2478. [2021-05-21 15:41:38,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:38,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-05-21 15:41:38,039 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-05-21 15:41:38,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:38,039 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-05-21 15:41:38,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:38,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-05-21 15:41:38,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:41:38,041 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:38,041 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:38,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:38,257 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:38,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:38,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1794345044, now seen corresponding path program 42 times [2021-05-21 15:41:38,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:38,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195100198] [2021-05-21 15:41:38,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:38,355 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:38,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:38,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195100198] [2021-05-21 15:41:38,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195100198] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:38,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156968562] [2021-05-21 15:41:38,355 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 [2021-05-21 15:41:38,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 15:41:38,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:38,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 15:41:38,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:38,515 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:38,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156968562] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:38,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:38,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-21 15:41:38,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145264178] [2021-05-21 15:41:38,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:41:38,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:38,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:41:38,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:41:38,516 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:38,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:38,745 INFO L93 Difference]: Finished difference Result 3446 states and 8947 transitions. [2021-05-21 15:41:38,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 15:41:38,746 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:41:38,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:38,749 INFO L225 Difference]: With dead ends: 3446 [2021-05-21 15:41:38,749 INFO L226 Difference]: Without dead ends: 3176 [2021-05-21 15:41:38,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 233.5ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:41:38,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-05-21 15:41:38,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2478. [2021-05-21 15:41:38,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:38,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-05-21 15:41:38,772 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-05-21 15:41:38,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:38,772 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-05-21 15:41:38,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:38,773 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-05-21 15:41:38,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:41:38,774 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:38,774 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:38,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-21 15:41:38,975 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:38,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:38,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1340128870, now seen corresponding path program 43 times [2021-05-21 15:41:38,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:38,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507266963] [2021-05-21 15:41:38,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:39,060 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:39,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:39,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507266963] [2021-05-21 15:41:39,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507266963] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:39,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876248356] [2021-05-21 15:41:39,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:39,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:39,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 15:41:39,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:39,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876248356] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:39,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:39,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-05-21 15:41:39,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198717384] [2021-05-21 15:41:39,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:41:39,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:39,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:41:39,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:41:39,207 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:39,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:39,438 INFO L93 Difference]: Finished difference Result 3421 states and 8897 transitions. [2021-05-21 15:41:39,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 15:41:39,439 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:41:39,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:39,442 INFO L225 Difference]: With dead ends: 3421 [2021-05-21 15:41:39,442 INFO L226 Difference]: Without dead ends: 3151 [2021-05-21 15:41:39,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 198.0ms TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:41:39,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-05-21 15:41:39,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2478. [2021-05-21 15:41:39,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:39,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-05-21 15:41:39,469 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-05-21 15:41:39,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:39,469 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-05-21 15:41:39,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:39,469 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-05-21 15:41:39,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:41:39,471 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:39,471 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:39,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:39,672 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:39,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:39,672 INFO L82 PathProgramCache]: Analyzing trace with hash -341232534, now seen corresponding path program 44 times [2021-05-21 15:41:39,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:39,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95119444] [2021-05-21 15:41:39,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:39,771 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:39,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:39,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95119444] [2021-05-21 15:41:39,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95119444] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:39,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849801799] [2021-05-21 15:41:39,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:39,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:41:39,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:39,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 15:41:39,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:39,930 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:39,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849801799] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:39,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:39,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-21 15:41:39,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029539544] [2021-05-21 15:41:39,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:41:39,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:39,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:41:39,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:41:39,932 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:40,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:40,202 INFO L93 Difference]: Finished difference Result 3371 states and 8797 transitions. [2021-05-21 15:41:40,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 15:41:40,202 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:41:40,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:40,205 INFO L225 Difference]: With dead ends: 3371 [2021-05-21 15:41:40,205 INFO L226 Difference]: Without dead ends: 3101 [2021-05-21 15:41:40,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 253.0ms TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:41:40,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3101 states. [2021-05-21 15:41:40,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3101 to 2478. [2021-05-21 15:41:40,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:40,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-05-21 15:41:40,230 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-05-21 15:41:40,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:40,230 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-05-21 15:41:40,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:40,230 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-05-21 15:41:40,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:41:40,232 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:40,232 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:40,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-21 15:41:40,432 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:40,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:40,432 INFO L82 PathProgramCache]: Analyzing trace with hash 2074406872, now seen corresponding path program 45 times [2021-05-21 15:41:40,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:40,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077607449] [2021-05-21 15:41:40,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:40,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:40,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077607449] [2021-05-21 15:41:40,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077607449] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:40,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885094260] [2021-05-21 15:41:40,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:40,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 15:41:40,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:40,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 15:41:40,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:40,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885094260] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:40,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:40,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-05-21 15:41:40,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023744798] [2021-05-21 15:41:40,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:41:40,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:40,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:41:40,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:41:40,675 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:40,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:40,905 INFO L93 Difference]: Finished difference Result 3321 states and 8697 transitions. [2021-05-21 15:41:40,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 15:41:40,905 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:41:40,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:40,907 INFO L225 Difference]: With dead ends: 3321 [2021-05-21 15:41:40,907 INFO L226 Difference]: Without dead ends: 3051 [2021-05-21 15:41:40,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 212.1ms TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:41:40,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-05-21 15:41:40,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 2478. [2021-05-21 15:41:40,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:40,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-05-21 15:41:40,931 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-05-21 15:41:40,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:40,931 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-05-21 15:41:40,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:40,931 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-05-21 15:41:40,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:41:40,933 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:40,933 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:41,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-21 15:41:41,134 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:41,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:41,134 INFO L82 PathProgramCache]: Analyzing trace with hash -190241112, now seen corresponding path program 46 times [2021-05-21 15:41:41,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:41,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52381812] [2021-05-21 15:41:41,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:41,218 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:41,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:41,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52381812] [2021-05-21 15:41:41,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52381812] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:41,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178654942] [2021-05-21 15:41:41,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:41,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:41:41,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:41,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 15:41:41,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:41,367 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:41,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178654942] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:41,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:41,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-21 15:41:41,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27486163] [2021-05-21 15:41:41,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:41:41,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:41,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:41:41,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:41:41,368 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:41,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:41,699 INFO L93 Difference]: Finished difference Result 3271 states and 8597 transitions. [2021-05-21 15:41:41,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 15:41:41,700 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:41:41,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:41,702 INFO L225 Difference]: With dead ends: 3271 [2021-05-21 15:41:41,702 INFO L226 Difference]: Without dead ends: 3001 [2021-05-21 15:41:41,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 304.3ms TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:41:41,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-05-21 15:41:41,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 2478. [2021-05-21 15:41:41,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:41,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-05-21 15:41:41,725 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-05-21 15:41:41,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:41,725 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-05-21 15:41:41,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:41,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-05-21 15:41:41,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:41:41,727 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:41,727 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:41,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-21 15:41:41,928 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:41,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:41,928 INFO L82 PathProgramCache]: Analyzing trace with hash 423998358, now seen corresponding path program 47 times [2021-05-21 15:41:41,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:41,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615699227] [2021-05-21 15:41:41,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:42,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:42,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615699227] [2021-05-21 15:41:42,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615699227] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:42,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075876998] [2021-05-21 15:41:42,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:42,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 15:41:42,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:42,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 15:41:42,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:42,151 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:42,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075876998] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:42,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:42,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-05-21 15:41:42,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253821883] [2021-05-21 15:41:42,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:41:42,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:42,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:41:42,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:41:42,152 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:42,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:42,421 INFO L93 Difference]: Finished difference Result 3221 states and 8497 transitions. [2021-05-21 15:41:42,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 15:41:42,421 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:41:42,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:42,424 INFO L225 Difference]: With dead ends: 3221 [2021-05-21 15:41:42,424 INFO L226 Difference]: Without dead ends: 2951 [2021-05-21 15:41:42,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 232.1ms TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:41:42,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-05-21 15:41:42,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2478. [2021-05-21 15:41:42,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:42,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-05-21 15:41:42,457 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-05-21 15:41:42,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:42,457 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-05-21 15:41:42,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:42,457 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-05-21 15:41:42,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:41:42,459 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:42,459 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:42,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:42,661 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:42,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:42,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1291243930, now seen corresponding path program 48 times [2021-05-21 15:41:42,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:42,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428544014] [2021-05-21 15:41:42,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:42,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:42,750 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:42,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:42,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428544014] [2021-05-21 15:41:42,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428544014] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:42,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703131361] [2021-05-21 15:41:42,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:42,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 15:41:42,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:42,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 15:41:42,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:42,900 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:42,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703131361] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:42,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:42,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-21 15:41:42,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690520003] [2021-05-21 15:41:42,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:41:42,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:42,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:41:42,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:41:42,901 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:43,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:43,299 INFO L93 Difference]: Finished difference Result 3679 states and 9763 transitions. [2021-05-21 15:41:43,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 15:41:43,300 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:41:43,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:43,303 INFO L225 Difference]: With dead ends: 3679 [2021-05-21 15:41:43,303 INFO L226 Difference]: Without dead ends: 3056 [2021-05-21 15:41:43,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 345.6ms TimeCoverageRelationStatistics Valid=381, Invalid=1179, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 15:41:43,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-05-21 15:41:43,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2388. [2021-05-21 15:41:43,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 2.785085881860075) internal successors, (6648), 2387 states have internal predecessors, (6648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:43,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6648 transitions. [2021-05-21 15:41:43,338 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6648 transitions. Word has length 80 [2021-05-21 15:41:43,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:43,338 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 6648 transitions. [2021-05-21 15:41:43,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:43,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6648 transitions. [2021-05-21 15:41:43,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:41:43,340 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:43,340 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:43,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:43,545 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:43,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:43,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1971075764, now seen corresponding path program 49 times [2021-05-21 15:41:43,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:43,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239331862] [2021-05-21 15:41:43,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:43,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:43,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239331862] [2021-05-21 15:41:43,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239331862] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:43,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470251442] [2021-05-21 15:41:43,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:43,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 15:41:43,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:43,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470251442] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:43,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:43,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-05-21 15:41:43,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831814972] [2021-05-21 15:41:43,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:41:43,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:43,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:41:43,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:41:43,762 INFO L87 Difference]: Start difference. First operand 2388 states and 6648 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:44,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:44,030 INFO L93 Difference]: Finished difference Result 3908 states and 10481 transitions. [2021-05-21 15:41:44,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 15:41:44,030 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:41:44,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:44,034 INFO L225 Difference]: With dead ends: 3908 [2021-05-21 15:41:44,034 INFO L226 Difference]: Without dead ends: 3638 [2021-05-21 15:41:44,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 228.4ms TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:41:44,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3638 states. [2021-05-21 15:41:44,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3638 to 2568. [2021-05-21 15:41:44,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 2.8075574600701207) internal successors, (7207), 2567 states have internal predecessors, (7207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:44,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 7207 transitions. [2021-05-21 15:41:44,077 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 7207 transitions. Word has length 80 [2021-05-21 15:41:44,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:44,077 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 7207 transitions. [2021-05-21 15:41:44,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:44,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 7207 transitions. [2021-05-21 15:41:44,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:41:44,079 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:44,079 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:44,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-05-21 15:41:44,289 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:44,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:44,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1993419014, now seen corresponding path program 50 times [2021-05-21 15:41:44,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:44,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711572920] [2021-05-21 15:41:44,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:44,370 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:44,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:44,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711572920] [2021-05-21 15:41:44,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711572920] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:44,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632262738] [2021-05-21 15:41:44,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:44,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:41:44,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:44,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 15:41:44,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:44,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632262738] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:44,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:41:44,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-21 15:41:44,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317781777] [2021-05-21 15:41:44,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:41:44,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:44,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:41:44,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:41:44,536 INFO L87 Difference]: Start difference. First operand 2568 states and 7207 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:44,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:44,909 INFO L93 Difference]: Finished difference Result 3203 states and 8605 transitions. [2021-05-21 15:41:44,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 15:41:44,909 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:41:44,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:44,912 INFO L225 Difference]: With dead ends: 3203 [2021-05-21 15:41:44,912 INFO L226 Difference]: Without dead ends: 2831 [2021-05-21 15:41:44,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 341.0ms TimeCoverageRelationStatistics Valid=416, Invalid=1066, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 15:41:44,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2831 states. [2021-05-21 15:41:44,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2831 to 2483. [2021-05-21 15:41:44,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2482 states have (on average 2.78928283642224) internal successors, (6923), 2482 states have internal predecessors, (6923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:44,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 6923 transitions. [2021-05-21 15:41:44,937 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 6923 transitions. Word has length 80 [2021-05-21 15:41:44,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:44,937 INFO L482 AbstractCegarLoop]: Abstraction has 2483 states and 6923 transitions. [2021-05-21 15:41:44,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:44,937 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 6923 transitions. [2021-05-21 15:41:44,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-21 15:41:44,939 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:44,939 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:45,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-05-21 15:41:45,145 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:45,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:45,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1150498713, now seen corresponding path program 51 times [2021-05-21 15:41:45,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:45,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350495496] [2021-05-21 15:41:45,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:45,251 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 77 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:45,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:45,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350495496] [2021-05-21 15:41:45,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350495496] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:45,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193132973] [2021-05-21 15:41:45,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:45,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 15:41:45,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:45,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:41:45,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:45,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193132973] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:41:45,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-21 15:41:45,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-05-21 15:41:45,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55730428] [2021-05-21 15:41:45,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 15:41:45,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:45,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 15:41:45,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:41:45,409 INFO L87 Difference]: Start difference. First operand 2483 states and 6923 transitions. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:45,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:45,519 INFO L93 Difference]: Finished difference Result 5807 states and 15758 transitions. [2021-05-21 15:41:45,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 15:41:45,519 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-05-21 15:41:45,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:45,520 INFO L225 Difference]: With dead ends: 5807 [2021-05-21 15:41:45,520 INFO L226 Difference]: Without dead ends: 1279 [2021-05-21 15:41:45,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 124.0ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:41:45,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-05-21 15:41:45,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1279. [2021-05-21 15:41:45,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 1278 states have (on average 2.5610328638497655) internal successors, (3273), 1278 states have internal predecessors, (3273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:45,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 3273 transitions. [2021-05-21 15:41:45,531 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 3273 transitions. Word has length 85 [2021-05-21 15:41:45,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:45,531 INFO L482 AbstractCegarLoop]: Abstraction has 1279 states and 3273 transitions. [2021-05-21 15:41:45,531 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) [2021-05-21 15:41:45,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 3273 transitions. [2021-05-21 15:41:45,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-21 15:41:45,532 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:41:45,532 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:41:45,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:45,733 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:41:45,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:41:45,733 INFO L82 PathProgramCache]: Analyzing trace with hash -489817904, now seen corresponding path program 52 times [2021-05-21 15:41:45,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:41:45,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098142640] [2021-05-21 15:41:45,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:41:45,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:41:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 81 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:45,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:41:45,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098142640] [2021-05-21 15:41:45,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098142640] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:41:45,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195692466] [2021-05-21 15:41:45,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:41:45,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:41:45,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:41:45,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:41:45,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:41:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:41:45,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195692466] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:41:45,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-21 15:41:45,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-05-21 15:41:45,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328792800] [2021-05-21 15:41:45,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 15:41:45,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:41:45,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 15:41:45,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:41:45,969 INFO L87 Difference]: Start difference. First operand 1279 states and 3273 transitions. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:46,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:41:46,085 INFO L93 Difference]: Finished difference Result 2288 states and 5575 transitions. [2021-05-21 15:41:46,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 15:41:46,085 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-05-21 15:41:46,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:41:46,086 INFO L225 Difference]: With dead ends: 2288 [2021-05-21 15:41:46,086 INFO L226 Difference]: Without dead ends: 0 [2021-05-21 15:41:46,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:41:46,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-21 15:41:46,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-21 15:41:46,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:41:46,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-21 15:41:46,086 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 85 [2021-05-21 15:41:46,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:41:46,086 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-21 15:41:46,087 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) [2021-05-21 15:41:46,087 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-21 15:41:46,087 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-21 15:41:46,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-05-21 15:41:46,304 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-21 15:41:46,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.05 03:41:46 BasicIcfg [2021-05-21 15:41:46,306 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-21 15:41:46,306 INFO L168 Benchmark]: Toolchain (without parser) took 41724.33 ms. Allocated memory was 339.7 MB in the beginning and 692.1 MB in the end (delta: 352.3 MB). Free memory was 302.1 MB in the beginning and 596.8 MB in the end (delta: -294.7 MB). Peak memory consumption was 58.9 MB. Max. memory is 16.0 GB. [2021-05-21 15:41:46,306 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 339.7 MB. Free memory was 320.1 MB in the beginning and 320.0 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 15:41:46,306 INFO L168 Benchmark]: CACSL2BoogieTranslator took 388.21 ms. Allocated memory is still 339.7 MB. Free memory was 301.8 MB in the beginning and 302.5 MB in the end (delta: -740.1 kB). Peak memory consumption was 7.1 MB. Max. memory is 16.0 GB. [2021-05-21 15:41:46,306 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.97 ms. Allocated memory is still 339.7 MB. Free memory was 302.5 MB in the beginning and 301.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 15:41:46,306 INFO L168 Benchmark]: Boogie Preprocessor took 21.42 ms. Allocated memory is still 339.7 MB. Free memory was 301.5 MB in the beginning and 299.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 15:41:46,306 INFO L168 Benchmark]: RCFGBuilder took 313.77 ms. Allocated memory is still 339.7 MB. Free memory was 299.4 MB in the beginning and 277.3 MB in the end (delta: 22.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-05-21 15:41:46,306 INFO L168 Benchmark]: TraceAbstraction took 40954.37 ms. Allocated memory was 339.7 MB in the beginning and 692.1 MB in the end (delta: 352.3 MB). Free memory was 277.3 MB in the beginning and 596.8 MB in the end (delta: -319.4 MB). Peak memory consumption was 35.1 MB. Max. memory is 16.0 GB. [2021-05-21 15:41:46,307 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 339.7 MB. Free memory was 320.1 MB in the beginning and 320.0 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 388.21 ms. Allocated memory is still 339.7 MB. Free memory was 301.8 MB in the beginning and 302.5 MB in the end (delta: -740.1 kB). Peak memory consumption was 7.1 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 41.97 ms. Allocated memory is still 339.7 MB. Free memory was 302.5 MB in the beginning and 301.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 21.42 ms. Allocated memory is still 339.7 MB. Free memory was 301.5 MB in the beginning and 299.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 313.77 ms. Allocated memory is still 339.7 MB. Free memory was 299.4 MB in the beginning and 277.3 MB in the end (delta: 22.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 40954.37 ms. Allocated memory was 339.7 MB in the beginning and 692.1 MB in the end (delta: 352.3 MB). Free memory was 277.3 MB in the beginning and 596.8 MB in the end (delta: -319.4 MB). Peak memory consumption was 35.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 40867.0ms, OverallIterations: 63, TraceHistogramMax: 6, EmptinessCheckTime: 128.9ms, AutomataDifference: 13118.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 72.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6276 SDtfs, 24236 SDslu, 39721 SDs, 0 SdLazy, 6940 SolverSat, 2749 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3163.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5368 GetRequests, 3809 SyntacticMatches, 0 SemanticMatches, 1559 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8583 ImplicationChecksByTransitivity, 11326.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2568occurred in iteration=60, InterpolantAutomatonStates: 1287, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1659.7ms AutomataMinimizationTime, 63 MinimizatonAttempts, 30890 StatesRemovedByMinimization, 61 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 579.2ms SsaConstructionTime, 1305.6ms SatisfiabilityAnalysisTime, 9954.2ms InterpolantComputationTime, 7864 NumberOfCodeBlocks, 7854 NumberOfCodeBlocksAsserted, 229 NumberOfCheckSat, 7745 ConstructedInterpolants, 0 QuantifiedInterpolants, 29437 SizeOfPredicates, 472 NumberOfNonLiveVariables, 8746 ConjunctsInSsa, 746 ConjunctsInUnsatCore, 119 InterpolantComputations, 9 PerfectInterpolantSequences, 373/4758 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...