/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 18:26:30,314 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 18:26:30,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 18:26:30,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-13 18:26:30,335 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-13 18:26:30,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-13 18:26:30,336 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-13 18:26:30,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-13 18:26:30,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-13 18:26:30,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-13 18:26:30,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-13 18:26:30,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-13 18:26:30,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-13 18:26:30,341 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-13 18:26:30,342 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-13 18:26:30,342 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-13 18:26:30,343 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-13 18:26:30,344 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-13 18:26:30,345 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-13 18:26:30,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-13 18:26:30,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-13 18:26:30,350 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-13 18:26:30,351 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-13 18:26:30,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-13 18:26:30,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-13 18:26:30,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-13 18:26:30,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-13 18:26:30,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-13 18:26:30,365 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 18:26:30,391 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 18:26:30,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 18:26:30,391 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 18:26:30,392 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 18:26:30,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 18:26:30,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 18:26:30,393 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 18:26:30,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 18:26:30,393 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 18:26:30,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 18:26:30,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 18:26:30,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 18:26:30,400 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 18:26:30,400 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 18:26:30,400 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 18:26:30,400 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 18:26:30,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 18:26:30,401 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 18:26:30,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 18:26:30,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 18:26:30,401 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 18:26:30,401 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 18:26:30,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 18:26:30,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 18:26:30,401 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 18:26:30,401 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 18:26:30,402 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 18:26:30,402 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 18:26:30,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 18:26:30,402 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 18:26:30,402 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 18:26:30,402 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 18:26:30,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 18:26:30,658 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 18:26:30,660 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 18:26:30,660 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-13 18:26:30,661 INFO L275 PluginConnector]: CDTParser initialized [2021-07-13 18:26:30,661 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2021-07-13 18:26:30,715 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6426bcaca/1534915d5edd4865b66bf85626c51725/FLAGb425d2360 [2021-07-13 18:26:31,166 INFO L306 CDTParser]: Found 1 translation units. [2021-07-13 18:26:31,166 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i [2021-07-13 18:26:31,190 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6426bcaca/1534915d5edd4865b66bf85626c51725/FLAGb425d2360 [2021-07-13 18:26:31,201 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6426bcaca/1534915d5edd4865b66bf85626c51725 [2021-07-13 18:26:31,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 18:26:31,206 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-13 18:26:31,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-13 18:26:31,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-13 18:26:31,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-13 18:26:31,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:26:31" (1/1) ... [2021-07-13 18:26:31,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54adeda9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:26:31, skipping insertion in model container [2021-07-13 18:26:31,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:26:31" (1/1) ... [2021-07-13 18:26:31,220 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-13 18:26:31,256 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-13 18:26:31,519 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-longer-2.i[30963,30976] [2021-07-13 18:26:31,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-13 18:26:31,529 INFO L203 MainTranslator]: Completed pre-run [2021-07-13 18:26:31,566 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-longer-2.i[30963,30976] [2021-07-13 18:26:31,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-13 18:26:31,593 INFO L208 MainTranslator]: Completed translation [2021-07-13 18:26:31,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:26:31 WrapperNode [2021-07-13 18:26:31,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-13 18:26:31,595 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 18:26:31,595 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 18:26:31,595 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 18:26:31,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:26:31" (1/1) ... [2021-07-13 18:26:31,625 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:26:31" (1/1) ... [2021-07-13 18:26:31,636 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 18:26:31,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 18:26:31,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 18:26:31,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 18:26:31,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:26:31" (1/1) ... [2021-07-13 18:26:31,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:26:31" (1/1) ... [2021-07-13 18:26:31,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:26:31" (1/1) ... [2021-07-13 18:26:31,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:26:31" (1/1) ... [2021-07-13 18:26:31,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:26:31" (1/1) ... [2021-07-13 18:26:31,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:26:31" (1/1) ... [2021-07-13 18:26:31,658 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:26:31" (1/1) ... [2021-07-13 18:26:31,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 18:26:31,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 18:26:31,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 18:26:31,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 18:26:31,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:26:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 18:26:31,718 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-07-13 18:26:31,719 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-07-13 18:26:31,719 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-07-13 18:26:31,719 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-07-13 18:26:31,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-13 18:26:31,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-07-13 18:26:31,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-13 18:26:31,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-13 18:26:31,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-13 18:26:31,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-07-13 18:26:31,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 18:26:31,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 18:26:31,722 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 18:26:31,965 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 18:26:31,965 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-07-13 18:26:31,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:26:31 BoogieIcfgContainer [2021-07-13 18:26:31,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 18:26:31,968 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 18:26:31,968 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 18:26:31,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 18:26:31,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 06:26:31" (1/3) ... [2021-07-13 18:26:31,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da75119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:26:31, skipping insertion in model container [2021-07-13 18:26:31,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:26:31" (2/3) ... [2021-07-13 18:26:31,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da75119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:26:31, skipping insertion in model container [2021-07-13 18:26:31,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:26:31" (3/3) ... [2021-07-13 18:26:31,971 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2021-07-13 18:26:31,975 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 18:26:31,975 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 18:26:31,975 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 18:26:31,976 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 18:26:32,003 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,003 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,003 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,003 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,003 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,004 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,004 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,004 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,004 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,004 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,004 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,004 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,004 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,005 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,005 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,005 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,005 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,005 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,005 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,006 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,006 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,006 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,006 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,006 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,006 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,006 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,006 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,006 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,007 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,007 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,007 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,007 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,007 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,007 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,007 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,007 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,007 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,008 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,008 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,008 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,008 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,008 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,008 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,008 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,008 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,009 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,009 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,009 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,009 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,009 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,009 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,009 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,009 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,009 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,010 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,010 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,011 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,011 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,011 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,011 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,012 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,012 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,015 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,015 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,016 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,016 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,016 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,016 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:26:32,017 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-07-13 18:26:32,031 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 18:26:32,043 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 18:26:32,043 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 18:26:32,043 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 18:26:32,043 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 18:26:32,043 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 18:26:32,043 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 18:26:32,043 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 18:26:32,044 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 18:26:32,050 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-07-13 18:26:32,092 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 780 states, 779 states have (on average 2.934531450577664) internal successors, (2286), 779 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:32,094 INFO L276 IsEmpty]: Start isEmpty. Operand has 780 states, 779 states have (on average 2.934531450577664) internal successors, (2286), 779 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:32,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 18:26:32,102 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:32,102 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:26:32,103 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:32,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:32,106 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-07-13 18:26:32,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:32,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949028869] [2021-07-13 18:26:32,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:32,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:32,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:32,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949028869] [2021-07-13 18:26:32,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949028869] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:26:32,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:26:32,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 18:26:32,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546153336] [2021-07-13 18:26:32,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 18:26:32,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:32,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 18:26:32,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 18:26:32,397 INFO L87 Difference]: Start difference. First operand has 780 states, 779 states have (on average 2.934531450577664) internal successors, (2286), 779 states have internal predecessors, (2286), 0 states have call successors, (0), 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) [2021-07-13 18:26:32,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:32,577 INFO L93 Difference]: Finished difference Result 1539 states and 4126 transitions. [2021-07-13 18:26:32,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 18:26:32,583 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 [2021-07-13 18:26:32,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:32,598 INFO L225 Difference]: With dead ends: 1539 [2021-07-13 18:26:32,599 INFO L226 Difference]: Without dead ends: 1242 [2021-07-13 18:26:32,600 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-13 18:26:32,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-07-13 18:26:32,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 942. [2021-07-13 18:26:32,664 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) [2021-07-13 18:26:32,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 2548 transitions. [2021-07-13 18:26:32,668 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 2548 transitions. Word has length 32 [2021-07-13 18:26:32,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:32,669 INFO L482 AbstractCegarLoop]: Abstraction has 942 states and 2548 transitions. [2021-07-13 18:26:32,669 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) [2021-07-13 18:26:32,669 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 2548 transitions. [2021-07-13 18:26:32,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 18:26:32,672 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:32,672 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:26:32,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 18:26:32,672 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:32,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:32,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1155051277, now seen corresponding path program 1 times [2021-07-13 18:26:32,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:32,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029795439] [2021-07-13 18:26:32,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:32,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:32,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:32,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029795439] [2021-07-13 18:26:32,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029795439] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:26:32,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:26:32,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 18:26:32,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085684399] [2021-07-13 18:26:32,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 18:26:32,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:32,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 18:26:32,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-13 18:26:32,803 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) [2021-07-13 18:26:32,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:32,932 INFO L93 Difference]: Finished difference Result 1194 states and 3180 transitions. [2021-07-13 18:26:32,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 18:26:32,932 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 [2021-07-13 18:26:32,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:32,937 INFO L225 Difference]: With dead ends: 1194 [2021-07-13 18:26:32,937 INFO L226 Difference]: Without dead ends: 942 [2021-07-13 18:26:32,938 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 18:26:32,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-07-13 18:26:32,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 800. [2021-07-13 18:26:32,965 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) [2021-07-13 18:26:32,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-07-13 18:26:32,967 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 36 [2021-07-13 18:26:32,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:32,969 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-07-13 18:26:32,969 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) [2021-07-13 18:26:32,969 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-07-13 18:26:32,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 18:26:32,970 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:32,970 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:26:32,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 18:26:32,971 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:32,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:32,973 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-07-13 18:26:32,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:32,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287190758] [2021-07-13 18:26:32,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:32,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:33,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:33,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287190758] [2021-07-13 18:26:33,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287190758] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:26:33,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:26:33,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 18:26:33,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085903390] [2021-07-13 18:26:33,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 18:26:33,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:33,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 18:26:33,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-13 18:26:33,074 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) [2021-07-13 18:26:33,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:33,206 INFO L93 Difference]: Finished difference Result 1302 states and 3436 transitions. [2021-07-13 18:26:33,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 18:26:33,207 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 [2021-07-13 18:26:33,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:33,211 INFO L225 Difference]: With dead ends: 1302 [2021-07-13 18:26:33,211 INFO L226 Difference]: Without dead ends: 920 [2021-07-13 18:26:33,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-13 18:26:33,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-07-13 18:26:33,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-07-13 18:26:33,227 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) [2021-07-13 18:26:33,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-07-13 18:26:33,232 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-07-13 18:26:33,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:33,232 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-07-13 18:26:33,232 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) [2021-07-13 18:26:33,232 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-07-13 18:26:33,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 18:26:33,235 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:33,235 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:26:33,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 18:26:33,235 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:33,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:33,237 INFO L82 PathProgramCache]: Analyzing trace with hash -262940086, now seen corresponding path program 1 times [2021-07-13 18:26:33,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:33,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303012341] [2021-07-13 18:26:33,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:33,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:33,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:33,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303012341] [2021-07-13 18:26:33,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303012341] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:26:33,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:26:33,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 18:26:33,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678416077] [2021-07-13 18:26:33,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 18:26:33,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:33,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 18:26:33,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 18:26:33,362 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) [2021-07-13 18:26:33,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:33,532 INFO L93 Difference]: Finished difference Result 1304 states and 3456 transitions. [2021-07-13 18:26:33,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 18:26:33,533 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 [2021-07-13 18:26:33,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:33,540 INFO L225 Difference]: With dead ends: 1304 [2021-07-13 18:26:33,540 INFO L226 Difference]: Without dead ends: 1044 [2021-07-13 18:26:33,543 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 146.5ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-13 18:26:33,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-07-13 18:26:33,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 876. [2021-07-13 18:26:33,563 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) [2021-07-13 18:26:33,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-07-13 18:26:33,566 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-07-13 18:26:33,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:33,567 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-07-13 18:26:33,568 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) [2021-07-13 18:26:33,568 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-07-13 18:26:33,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 18:26:33,569 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:33,569 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:26:33,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 18:26:33,569 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:33,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:33,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1449045748, now seen corresponding path program 2 times [2021-07-13 18:26:33,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:33,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372278589] [2021-07-13 18:26:33,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:33,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:33,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:33,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372278589] [2021-07-13 18:26:33,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372278589] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:26:33,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:26:33,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 18:26:33,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331520705] [2021-07-13 18:26:33,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 18:26:33,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:33,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 18:26:33,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 18:26:33,658 INFO L87 Difference]: Start difference. First operand 876 states and 2368 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) [2021-07-13 18:26:33,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:33,785 INFO L93 Difference]: Finished difference Result 1524 states and 4056 transitions. [2021-07-13 18:26:33,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 18:26:33,785 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 [2021-07-13 18:26:33,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:33,790 INFO L225 Difference]: With dead ends: 1524 [2021-07-13 18:26:33,790 INFO L226 Difference]: Without dead ends: 1131 [2021-07-13 18:26:33,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-13 18:26:33,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-07-13 18:26:33,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 1033. [2021-07-13 18:26:33,810 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) [2021-07-13 18:26:33,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2823 transitions. [2021-07-13 18:26:33,813 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2823 transitions. Word has length 40 [2021-07-13 18:26:33,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:33,814 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 2823 transitions. [2021-07-13 18:26:33,814 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) [2021-07-13 18:26:33,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2823 transitions. [2021-07-13 18:26:33,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-13 18:26:33,815 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:33,815 INFO L508 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] [2021-07-13 18:26:33,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 18:26:33,816 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:33,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:33,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1733061585, now seen corresponding path program 1 times [2021-07-13 18:26:33,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:33,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763788653] [2021-07-13 18:26:33,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:33,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:33,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:33,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763788653] [2021-07-13 18:26:33,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763788653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:33,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259815897] [2021-07-13 18:26:33,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:33,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:33,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 18:26:33,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:34,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259815897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:34,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:34,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 18:26:34,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265472454] [2021-07-13 18:26:34,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 18:26:34,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:34,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 18:26:34,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 18:26:34,132 INFO L87 Difference]: Start difference. First operand 1033 states and 2823 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:34,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:34,361 INFO L93 Difference]: Finished difference Result 2071 states and 5539 transitions. [2021-07-13 18:26:34,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 18:26:34,362 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2021-07-13 18:26:34,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:34,368 INFO L225 Difference]: With dead ends: 2071 [2021-07-13 18:26:34,370 INFO L226 Difference]: Without dead ends: 1481 [2021-07-13 18:26:34,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 183.3ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-07-13 18:26:34,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-07-13 18:26:34,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1253. [2021-07-13 18:26:34,405 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) [2021-07-13 18:26:34,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 3458 transitions. [2021-07-13 18:26:34,408 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 3458 transitions. Word has length 45 [2021-07-13 18:26:34,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:34,408 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 3458 transitions. [2021-07-13 18:26:34,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:34,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 3458 transitions. [2021-07-13 18:26:34,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-13 18:26:34,410 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:34,410 INFO L508 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] [2021-07-13 18:26:34,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-07-13 18:26:34,625 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:34,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:34,625 INFO L82 PathProgramCache]: Analyzing trace with hash -4578824, now seen corresponding path program 1 times [2021-07-13 18:26:34,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:34,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657150351] [2021-07-13 18:26:34,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:34,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:34,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:34,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:34,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657150351] [2021-07-13 18:26:34,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657150351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:34,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051218829] [2021-07-13 18:26:34,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:34,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 18:26:34,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:34,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:34,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051218829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:34,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:34,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 18:26:34,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906028092] [2021-07-13 18:26:34,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 18:26:34,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:34,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 18:26:34,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 18:26:34,898 INFO L87 Difference]: Start difference. First operand 1253 states and 3458 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:35,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:35,022 INFO L93 Difference]: Finished difference Result 2398 states and 6444 transitions. [2021-07-13 18:26:35,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 18:26:35,023 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2021-07-13 18:26:35,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:35,030 INFO L225 Difference]: With dead ends: 2398 [2021-07-13 18:26:35,030 INFO L226 Difference]: Without dead ends: 1926 [2021-07-13 18:26:35,031 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:26:35,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-07-13 18:26:35,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1456. [2021-07-13 18:26:35,062 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) [2021-07-13 18:26:35,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 3969 transitions. [2021-07-13 18:26:35,066 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 3969 transitions. Word has length 45 [2021-07-13 18:26:35,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:35,067 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 3969 transitions. [2021-07-13 18:26:35,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:35,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 3969 transitions. [2021-07-13 18:26:35,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-13 18:26:35,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:35,070 INFO L508 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] [2021-07-13 18:26:35,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:35,285 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:35,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:35,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1431609058, now seen corresponding path program 1 times [2021-07-13 18:26:35,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:35,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903935394] [2021-07-13 18:26:35,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:35,362 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:35,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:35,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903935394] [2021-07-13 18:26:35,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903935394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:35,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460656530] [2021-07-13 18:26:35,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:35,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:35,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 18:26:35,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:35,548 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:35,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460656530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:35,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:35,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 18:26:35,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320794200] [2021-07-13 18:26:35,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 18:26:35,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:35,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 18:26:35,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 18:26:35,549 INFO L87 Difference]: Start difference. First operand 1456 states and 3969 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) [2021-07-13 18:26:35,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:35,851 INFO L93 Difference]: Finished difference Result 3181 states and 8585 transitions. [2021-07-13 18:26:35,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 18:26:35,851 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 [2021-07-13 18:26:35,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:35,859 INFO L225 Difference]: With dead ends: 3181 [2021-07-13 18:26:35,860 INFO L226 Difference]: Without dead ends: 2281 [2021-07-13 18:26:35,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 239.5ms TimeCoverageRelationStatistics Valid=224, Invalid=646, Unknown=0, NotChecked=0, Total=870 [2021-07-13 18:26:35,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2021-07-13 18:26:35,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 1656. [2021-07-13 18:26:35,901 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) [2021-07-13 18:26:35,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 4519 transitions. [2021-07-13 18:26:35,906 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 4519 transitions. Word has length 55 [2021-07-13 18:26:35,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:35,907 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 4519 transitions. [2021-07-13 18:26:35,907 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) [2021-07-13 18:26:35,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 4519 transitions. [2021-07-13 18:26:35,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-13 18:26:35,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:35,909 INFO L508 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] [2021-07-13 18:26:36,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:36,125 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:36,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:36,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1291036999, now seen corresponding path program 2 times [2021-07-13 18:26:36,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:36,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212639495] [2021-07-13 18:26:36,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:36,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:36,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:36,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212639495] [2021-07-13 18:26:36,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212639495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:36,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410309439] [2021-07-13 18:26:36,191 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:36,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:26:36,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:36,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 18:26:36,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:36,411 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:36,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410309439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:36,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:36,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 18:26:36,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419093521] [2021-07-13 18:26:36,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 18:26:36,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:36,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 18:26:36,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 18:26:36,413 INFO L87 Difference]: Start difference. First operand 1656 states and 4519 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) [2021-07-13 18:26:36,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:36,662 INFO L93 Difference]: Finished difference Result 3238 states and 8770 transitions. [2021-07-13 18:26:36,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 18:26:36,663 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 [2021-07-13 18:26:36,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:36,671 INFO L225 Difference]: With dead ends: 3238 [2021-07-13 18:26:36,671 INFO L226 Difference]: Without dead ends: 2426 [2021-07-13 18:26:36,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 204.2ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-07-13 18:26:36,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-07-13 18:26:36,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1856. [2021-07-13 18:26:36,721 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) [2021-07-13 18:26:36,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 5069 transitions. [2021-07-13 18:26:36,725 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 5069 transitions. Word has length 55 [2021-07-13 18:26:36,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:36,725 INFO L482 AbstractCegarLoop]: Abstraction has 1856 states and 5069 transitions. [2021-07-13 18:26:36,725 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) [2021-07-13 18:26:36,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 5069 transitions. [2021-07-13 18:26:36,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 18:26:36,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:36,728 INFO L508 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] [2021-07-13 18:26:36,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:36,928 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:36,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:36,929 INFO L82 PathProgramCache]: Analyzing trace with hash -869732173, now seen corresponding path program 3 times [2021-07-13 18:26:36,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:36,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484277506] [2021-07-13 18:26:36,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:36,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:37,015 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:37,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:37,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484277506] [2021-07-13 18:26:37,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484277506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:37,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964264424] [2021-07-13 18:26:37,016 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:37,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 18:26:37,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:37,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 18:26:37,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:37,198 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:37,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964264424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:37,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:37,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-13 18:26:37,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302464880] [2021-07-13 18:26:37,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 18:26:37,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:37,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 18:26:37,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 18:26:37,200 INFO L87 Difference]: Start difference. First operand 1856 states and 5069 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 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) [2021-07-13 18:26:37,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:37,491 INFO L93 Difference]: Finished difference Result 3085 states and 8445 transitions. [2021-07-13 18:26:37,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 18:26:37,492 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 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 [2021-07-13 18:26:37,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:37,517 INFO L225 Difference]: With dead ends: 3085 [2021-07-13 18:26:37,518 INFO L226 Difference]: Without dead ends: 2271 [2021-07-13 18:26:37,518 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 232.8ms TimeCoverageRelationStatistics Valid=255, Invalid=737, Unknown=0, NotChecked=0, Total=992 [2021-07-13 18:26:37,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2021-07-13 18:26:37,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2086. [2021-07-13 18:26:37,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 2085 states have (on average 2.7525179856115107) internal successors, (5739), 2085 states have internal predecessors, (5739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:37,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 5739 transitions. [2021-07-13 18:26:37,559 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 5739 transitions. Word has length 65 [2021-07-13 18:26:37,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:37,559 INFO L482 AbstractCegarLoop]: Abstraction has 2086 states and 5739 transitions. [2021-07-13 18:26:37,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 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) [2021-07-13 18:26:37,559 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 5739 transitions. [2021-07-13 18:26:37,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 18:26:37,562 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:37,562 INFO L508 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] [2021-07-13 18:26:37,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-13 18:26:37,773 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:37,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:37,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1279026730, now seen corresponding path program 4 times [2021-07-13 18:26:37,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:37,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060473127] [2021-07-13 18:26:37,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:37,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:37,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060473127] [2021-07-13 18:26:37,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060473127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:37,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193117814] [2021-07-13 18:26:37,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:37,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:26:37,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:37,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 18:26:37,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:38,031 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:38,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193117814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:38,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:38,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-07-13 18:26:38,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543262276] [2021-07-13 18:26:38,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 18:26:38,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:38,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 18:26:38,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 18:26:38,033 INFO L87 Difference]: Start difference. First operand 2086 states and 5739 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) [2021-07-13 18:26:38,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:38,333 INFO L93 Difference]: Finished difference Result 3503 states and 9510 transitions. [2021-07-13 18:26:38,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 18:26:38,334 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 [2021-07-13 18:26:38,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:38,352 INFO L225 Difference]: With dead ends: 3503 [2021-07-13 18:26:38,352 INFO L226 Difference]: Without dead ends: 2691 [2021-07-13 18:26:38,353 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 248.7ms TimeCoverageRelationStatistics Valid=266, Invalid=726, Unknown=0, NotChecked=0, Total=992 [2021-07-13 18:26:38,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2021-07-13 18:26:38,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 2286. [2021-07-13 18:26:38,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2286 states, 2285 states have (on average 2.7522975929978117) internal successors, (6289), 2285 states have internal predecessors, (6289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:38,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 6289 transitions. [2021-07-13 18:26:38,392 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 6289 transitions. Word has length 65 [2021-07-13 18:26:38,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:38,392 INFO L482 AbstractCegarLoop]: Abstraction has 2286 states and 6289 transitions. [2021-07-13 18:26:38,392 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) [2021-07-13 18:26:38,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 6289 transitions. [2021-07-13 18:26:38,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-07-13 18:26:38,395 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:38,395 INFO L508 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] [2021-07-13 18:26:38,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:38,605 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:38,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:38,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1253969596, now seen corresponding path program 5 times [2021-07-13 18:26:38,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:38,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912655669] [2021-07-13 18:26:38,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:38,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:38,688 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:38,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:38,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912655669] [2021-07-13 18:26:38,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912655669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:38,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848138127] [2021-07-13 18:26:38,689 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:38,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 18:26:38,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:38,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 18:26:38,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:38,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848138127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:38,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:38,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 18:26:38,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850509168] [2021-07-13 18:26:38,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:26:38,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:38,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:26:38,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:26:38,853 INFO L87 Difference]: Start difference. First operand 2286 states and 6289 transitions. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:39,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:39,265 INFO L93 Difference]: Finished difference Result 3075 states and 8409 transitions. [2021-07-13 18:26:39,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 18:26:39,266 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-07-13 18:26:39,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:39,271 INFO L225 Difference]: With dead ends: 3075 [2021-07-13 18:26:39,271 INFO L226 Difference]: Without dead ends: 2571 [2021-07-13 18:26:39,271 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 355.6ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:26:39,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-07-13 18:26:39,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 2486. [2021-07-13 18:26:39,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 2.752112676056338) internal successors, (6839), 2485 states have internal predecessors, (6839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:39,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 6839 transitions. [2021-07-13 18:26:39,311 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 6839 transitions. Word has length 75 [2021-07-13 18:26:39,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:39,311 INFO L482 AbstractCegarLoop]: Abstraction has 2486 states and 6839 transitions. [2021-07-13 18:26:39,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:39,312 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 6839 transitions. [2021-07-13 18:26:39,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-07-13 18:26:39,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:39,315 INFO L508 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] [2021-07-13 18:26:39,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 18:26:39,533 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:39,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:39,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1222155355, now seen corresponding path program 6 times [2021-07-13 18:26:39,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:39,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080328465] [2021-07-13 18:26:39,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:39,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:39,615 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:39,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:39,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080328465] [2021-07-13 18:26:39,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080328465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:39,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487117680] [2021-07-13 18:26:39,616 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:39,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 18:26:39,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:39,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 18:26:39,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:39,785 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:39,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487117680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:39,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:39,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-13 18:26:39,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753016535] [2021-07-13 18:26:39,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:26:39,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:39,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:26:39,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:26:39,786 INFO L87 Difference]: Start difference. First operand 2486 states and 6839 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) [2021-07-13 18:26:40,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:40,226 INFO L93 Difference]: Finished difference Result 3903 states and 10610 transitions. [2021-07-13 18:26:40,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:26:40,226 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 [2021-07-13 18:26:40,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:40,233 INFO L225 Difference]: With dead ends: 3903 [2021-07-13 18:26:40,233 INFO L226 Difference]: Without dead ends: 3091 [2021-07-13 18:26:40,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 370.6ms TimeCoverageRelationStatistics Valid=386, Invalid=1174, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 18:26:40,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3091 states. [2021-07-13 18:26:40,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3091 to 2686. [2021-07-13 18:26:40,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2686 states, 2685 states have (on average 2.7519553072625698) internal successors, (7389), 2685 states have internal predecessors, (7389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:40,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2686 states to 2686 states and 7389 transitions. [2021-07-13 18:26:40,285 INFO L78 Accepts]: Start accepts. Automaton has 2686 states and 7389 transitions. Word has length 75 [2021-07-13 18:26:40,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:40,285 INFO L482 AbstractCegarLoop]: Abstraction has 2686 states and 7389 transitions. [2021-07-13 18:26:40,285 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) [2021-07-13 18:26:40,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2686 states and 7389 transitions. [2021-07-13 18:26:40,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-07-13 18:26:40,290 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:40,290 INFO L508 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] [2021-07-13 18:26:40,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 18:26:40,505 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:40,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:40,505 INFO L82 PathProgramCache]: Analyzing trace with hash 681848981, now seen corresponding path program 7 times [2021-07-13 18:26:40,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:40,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234751443] [2021-07-13 18:26:40,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:40,607 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:40,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:40,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234751443] [2021-07-13 18:26:40,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234751443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:40,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207421724] [2021-07-13 18:26:40,607 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:40,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:40,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 18:26:40,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:40,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207421724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:40,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:40,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 18:26:40,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918283683] [2021-07-13 18:26:40,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:26:40,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:40,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:26:40,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:26:40,826 INFO L87 Difference]: Start difference. First operand 2686 states and 7389 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:41,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:41,317 INFO L93 Difference]: Finished difference Result 3971 states and 10749 transitions. [2021-07-13 18:26:41,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 18:26:41,317 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have 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 [2021-07-13 18:26:41,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:41,324 INFO L225 Difference]: With dead ends: 3971 [2021-07-13 18:26:41,325 INFO L226 Difference]: Without dead ends: 3381 [2021-07-13 18:26:41,326 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 459.0ms TimeCoverageRelationStatistics Valid=554, Invalid=1608, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 18:26:41,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3381 states. [2021-07-13 18:26:41,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3381 to 2856. [2021-07-13 18:26:41,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2856 states, 2855 states have (on average 2.738704028021016) internal successors, (7819), 2855 states have internal predecessors, (7819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:41,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2856 states to 2856 states and 7819 transitions. [2021-07-13 18:26:41,372 INFO L78 Accepts]: Start accepts. Automaton has 2856 states and 7819 transitions. Word has length 85 [2021-07-13 18:26:41,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:41,373 INFO L482 AbstractCegarLoop]: Abstraction has 2856 states and 7819 transitions. [2021-07-13 18:26:41,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:41,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2856 states and 7819 transitions. [2021-07-13 18:26:41,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-07-13 18:26:41,376 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:41,376 INFO L508 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] [2021-07-13 18:26:41,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 18:26:41,597 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:41,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:41,597 INFO L82 PathProgramCache]: Analyzing trace with hash 269514420, now seen corresponding path program 8 times [2021-07-13 18:26:41,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:41,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378233529] [2021-07-13 18:26:41,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:41,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:41,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378233529] [2021-07-13 18:26:41,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378233529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:41,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956350098] [2021-07-13 18:26:41,720 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:41,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:26:41,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:41,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:26:41,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:41,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956350098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:41,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:41,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 18:26:41,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392136034] [2021-07-13 18:26:41,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:26:41,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:41,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:26:41,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:26:41,910 INFO L87 Difference]: Start difference. First operand 2856 states and 7819 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:42,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:42,423 INFO L93 Difference]: Finished difference Result 4438 states and 12070 transitions. [2021-07-13 18:26:42,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 18:26:42,423 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have 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 [2021-07-13 18:26:42,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:42,433 INFO L225 Difference]: With dead ends: 4438 [2021-07-13 18:26:42,433 INFO L226 Difference]: Without dead ends: 3626 [2021-07-13 18:26:42,435 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 421.5ms TimeCoverageRelationStatistics Valid=510, Invalid=1560, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 18:26:42,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3626 states. [2021-07-13 18:26:42,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3626 to 3056. [2021-07-13 18:26:42,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3056 states, 3055 states have (on average 2.739443535188216) internal successors, (8369), 3055 states have internal predecessors, (8369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:42,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3056 states to 3056 states and 8369 transitions. [2021-07-13 18:26:42,484 INFO L78 Accepts]: Start accepts. Automaton has 3056 states and 8369 transitions. Word has length 85 [2021-07-13 18:26:42,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:42,484 INFO L482 AbstractCegarLoop]: Abstraction has 3056 states and 8369 transitions. [2021-07-13 18:26:42,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:42,484 INFO L276 IsEmpty]: Start isEmpty. Operand 3056 states and 8369 transitions. [2021-07-13 18:26:42,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-07-13 18:26:42,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:42,488 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:26:42,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 18:26:42,704 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:42,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:42,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1377812826, now seen corresponding path program 9 times [2021-07-13 18:26:42,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:42,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037278756] [2021-07-13 18:26:42,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:42,831 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:42,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:42,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037278756] [2021-07-13 18:26:42,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037278756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:42,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898227868] [2021-07-13 18:26:42,832 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:42,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 18:26:42,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:42,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:26:42,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:43,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898227868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:43,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:43,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-07-13 18:26:43,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703161880] [2021-07-13 18:26:43,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:26:43,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:43,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:26:43,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:26:43,053 INFO L87 Difference]: Start difference. First operand 3056 states and 8369 transitions. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:43,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:43,635 INFO L93 Difference]: Finished difference Result 4285 states and 11745 transitions. [2021-07-13 18:26:43,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 18:26:43,635 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-07-13 18:26:43,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:43,642 INFO L225 Difference]: With dead ends: 4285 [2021-07-13 18:26:43,642 INFO L226 Difference]: Without dead ends: 3471 [2021-07-13 18:26:43,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 510.8ms TimeCoverageRelationStatistics Valid=621, Invalid=1829, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 18:26:43,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3471 states. [2021-07-13 18:26:43,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3471 to 3286. [2021-07-13 18:26:43,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3286 states, 3285 states have (on average 2.7515981735159816) internal successors, (9039), 3285 states have internal predecessors, (9039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:43,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3286 states to 3286 states and 9039 transitions. [2021-07-13 18:26:43,687 INFO L78 Accepts]: Start accepts. Automaton has 3286 states and 9039 transitions. Word has length 95 [2021-07-13 18:26:43,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:43,687 INFO L482 AbstractCegarLoop]: Abstraction has 3286 states and 9039 transitions. [2021-07-13 18:26:43,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:43,688 INFO L276 IsEmpty]: Start isEmpty. Operand 3286 states and 9039 transitions. [2021-07-13 18:26:43,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-07-13 18:26:43,693 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:43,694 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:26:43,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 18:26:43,909 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:43,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:43,909 INFO L82 PathProgramCache]: Analyzing trace with hash -865844477, now seen corresponding path program 10 times [2021-07-13 18:26:43,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:43,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882295703] [2021-07-13 18:26:43,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:44,020 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:44,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:44,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882295703] [2021-07-13 18:26:44,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882295703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:44,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299349742] [2021-07-13 18:26:44,020 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:44,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:26:44,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:44,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 18:26:44,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:44,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299349742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:44,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:44,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-07-13 18:26:44,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915196792] [2021-07-13 18:26:44,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:26:44,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:44,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:26:44,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:26:44,195 INFO L87 Difference]: Start difference. First operand 3286 states and 9039 transitions. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:44,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:44,653 INFO L93 Difference]: Finished difference Result 4115 states and 11239 transitions. [2021-07-13 18:26:44,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 18:26:44,654 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-07-13 18:26:44,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:44,660 INFO L225 Difference]: With dead ends: 4115 [2021-07-13 18:26:44,660 INFO L226 Difference]: Without dead ends: 3506 [2021-07-13 18:26:44,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 416.6ms TimeCoverageRelationStatistics Valid=611, Invalid=1459, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 18:26:44,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3506 states. [2021-07-13 18:26:44,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3506 to 2034. [2021-07-13 18:26:44,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 2.73782587309395) internal successors, (5566), 2033 states have internal predecessors, (5566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:44,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5566 transitions. [2021-07-13 18:26:44,696 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5566 transitions. Word has length 95 [2021-07-13 18:26:44,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:44,696 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 5566 transitions. [2021-07-13 18:26:44,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:44,696 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5566 transitions. [2021-07-13 18:26:44,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-07-13 18:26:44,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:44,699 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:26:44,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:44,913 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:44,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:44,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1010524186, now seen corresponding path program 11 times [2021-07-13 18:26:44,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:44,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195992242] [2021-07-13 18:26:44,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:45,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:45,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195992242] [2021-07-13 18:26:45,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195992242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:45,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218695460] [2021-07-13 18:26:45,046 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:45,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 18:26:45,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:45,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:26:45,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:45,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218695460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:45,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:45,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-07-13 18:26:45,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930377031] [2021-07-13 18:26:45,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:26:45,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:45,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:26:45,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:26:45,280 INFO L87 Difference]: Start difference. First operand 2034 states and 5566 transitions. Second operand has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:45,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:45,924 INFO L93 Difference]: Finished difference Result 4070 states and 11149 transitions. [2021-07-13 18:26:45,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 18:26:45,925 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-07-13 18:26:45,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:45,930 INFO L225 Difference]: With dead ends: 4070 [2021-07-13 18:26:45,930 INFO L226 Difference]: Without dead ends: 3566 [2021-07-13 18:26:45,931 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 595.6ms TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 18:26:45,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3566 states. [2021-07-13 18:26:45,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3566 to 2122. [2021-07-13 18:26:45,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2122 states, 2121 states have (on average 2.742574257425743) internal successors, (5817), 2121 states have internal predecessors, (5817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:45,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 5817 transitions. [2021-07-13 18:26:45,964 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 5817 transitions. Word has length 100 [2021-07-13 18:26:45,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:45,965 INFO L482 AbstractCegarLoop]: Abstraction has 2122 states and 5817 transitions. [2021-07-13 18:26:45,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:45,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 5817 transitions. [2021-07-13 18:26:45,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-07-13 18:26:45,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:45,967 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:26:46,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-13 18:26:46,183 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:46,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:46,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1024633719, now seen corresponding path program 12 times [2021-07-13 18:26:46,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:46,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405408256] [2021-07-13 18:26:46,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:46,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:46,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405408256] [2021-07-13 18:26:46,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405408256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:46,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737472679] [2021-07-13 18:26:46,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:46,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 18:26:46,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:46,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:26:46,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:46,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737472679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:46,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:46,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-13 18:26:46,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863758259] [2021-07-13 18:26:46,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 18:26:46,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:46,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 18:26:46,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:26:46,613 INFO L87 Difference]: Start difference. First operand 2122 states and 5817 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:47,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:47,344 INFO L93 Difference]: Finished difference Result 4676 states and 12714 transitions. [2021-07-13 18:26:47,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 18:26:47,345 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-07-13 18:26:47,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:47,352 INFO L225 Difference]: With dead ends: 4676 [2021-07-13 18:26:47,352 INFO L226 Difference]: Without dead ends: 4086 [2021-07-13 18:26:47,353 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 660.0ms TimeCoverageRelationStatistics Valid=830, Invalid=2592, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 18:26:47,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4086 states. [2021-07-13 18:26:47,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4086 to 3428. [2021-07-13 18:26:47,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 2.825503355704698) internal successors, (9683), 3427 states have internal predecessors, (9683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:47,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9683 transitions. [2021-07-13 18:26:47,408 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9683 transitions. Word has length 105 [2021-07-13 18:26:47,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:47,409 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9683 transitions. [2021-07-13 18:26:47,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:47,409 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9683 transitions. [2021-07-13 18:26:47,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-07-13 18:26:47,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:47,413 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:26:47,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:47,629 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:47,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:47,629 INFO L82 PathProgramCache]: Analyzing trace with hash -933655573, now seen corresponding path program 13 times [2021-07-13 18:26:47,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:47,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575496492] [2021-07-13 18:26:47,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:47,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:47,805 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:47,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:47,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575496492] [2021-07-13 18:26:47,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575496492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:47,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375091588] [2021-07-13 18:26:47,805 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:47,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:47,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:26:47,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:48,025 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:48,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375091588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:48,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:48,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-07-13 18:26:48,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912757680] [2021-07-13 18:26:48,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 18:26:48,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:48,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 18:26:48,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-07-13 18:26:48,026 INFO L87 Difference]: Start difference. First operand 3428 states and 9683 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:48,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:48,815 INFO L93 Difference]: Finished difference Result 4896 states and 13289 transitions. [2021-07-13 18:26:48,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 18:26:48,815 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-07-13 18:26:48,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:48,820 INFO L225 Difference]: With dead ends: 4896 [2021-07-13 18:26:48,820 INFO L226 Difference]: Without dead ends: 4306 [2021-07-13 18:26:48,821 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 760.8ms TimeCoverageRelationStatistics Valid=997, Invalid=2785, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 18:26:48,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4306 states. [2021-07-13 18:26:48,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4306 to 2412. [2021-07-13 18:26:48,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2411 states have (on average 2.740356698465367) internal successors, (6607), 2411 states have internal predecessors, (6607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:48,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 6607 transitions. [2021-07-13 18:26:48,856 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 6607 transitions. Word has length 110 [2021-07-13 18:26:48,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:48,856 INFO L482 AbstractCegarLoop]: Abstraction has 2412 states and 6607 transitions. [2021-07-13 18:26:48,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:48,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 6607 transitions. [2021-07-13 18:26:48,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-07-13 18:26:48,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:48,859 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:26:49,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 18:26:49,065 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:49,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:49,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1833208, now seen corresponding path program 14 times [2021-07-13 18:26:49,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:49,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161819029] [2021-07-13 18:26:49,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:49,210 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:49,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:49,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161819029] [2021-07-13 18:26:49,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161819029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:49,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531125344] [2021-07-13 18:26:49,211 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:49,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:26:49,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:49,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:26:49,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:49,421 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:49,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531125344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:49,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:49,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-07-13 18:26:49,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863268740] [2021-07-13 18:26:49,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 18:26:49,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:49,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 18:26:49,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-07-13 18:26:49,423 INFO L87 Difference]: Start difference. First operand 2412 states and 6607 transitions. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:50,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:50,143 INFO L93 Difference]: Finished difference Result 5170 states and 14175 transitions. [2021-07-13 18:26:50,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 18:26:50,143 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-07-13 18:26:50,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:50,149 INFO L225 Difference]: With dead ends: 5170 [2021-07-13 18:26:50,149 INFO L226 Difference]: Without dead ends: 4356 [2021-07-13 18:26:50,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 644.0ms TimeCoverageRelationStatistics Valid=960, Invalid=2822, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 18:26:50,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4356 states. [2021-07-13 18:26:50,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4356 to 3778. [2021-07-13 18:26:50,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3778 states, 3777 states have (on average 2.8284352660841936) internal successors, (10683), 3777 states have internal predecessors, (10683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:50,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3778 states to 3778 states and 10683 transitions. [2021-07-13 18:26:50,201 INFO L78 Accepts]: Start accepts. Automaton has 3778 states and 10683 transitions. Word has length 115 [2021-07-13 18:26:50,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:50,201 INFO L482 AbstractCegarLoop]: Abstraction has 3778 states and 10683 transitions. [2021-07-13 18:26:50,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:50,201 INFO L276 IsEmpty]: Start isEmpty. Operand 3778 states and 10683 transitions. [2021-07-13 18:26:50,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-07-13 18:26:50,206 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:50,206 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:26:50,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:50,421 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:50,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:50,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1068754556, now seen corresponding path program 15 times [2021-07-13 18:26:50,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:50,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821967868] [2021-07-13 18:26:50,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:50,589 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:50,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:50,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821967868] [2021-07-13 18:26:50,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821967868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:50,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075987623] [2021-07-13 18:26:50,589 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:50,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 18:26:50,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:50,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 18:26:50,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:50,834 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:50,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075987623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:50,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:50,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-07-13 18:26:50,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392162962] [2021-07-13 18:26:50,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 18:26:50,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:50,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 18:26:50,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-07-13 18:26:50,836 INFO L87 Difference]: Start difference. First operand 3778 states and 10683 transitions. Second operand has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:51,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:51,623 INFO L93 Difference]: Finished difference Result 5280 states and 14485 transitions. [2021-07-13 18:26:51,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 18:26:51,623 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-07-13 18:26:51,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:51,629 INFO L225 Difference]: With dead ends: 5280 [2021-07-13 18:26:51,629 INFO L226 Difference]: Without dead ends: 4466 [2021-07-13 18:26:51,630 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 702.5ms TimeCoverageRelationStatistics Valid=974, Invalid=2932, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 18:26:51,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4466 states. [2021-07-13 18:26:51,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4466 to 2522. [2021-07-13 18:26:51,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2522 states, 2521 states have (on average 2.7437524791749306) internal successors, (6917), 2521 states have internal predecessors, (6917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:51,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2522 states to 2522 states and 6917 transitions. [2021-07-13 18:26:51,672 INFO L78 Accepts]: Start accepts. Automaton has 2522 states and 6917 transitions. Word has length 120 [2021-07-13 18:26:51,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:51,672 INFO L482 AbstractCegarLoop]: Abstraction has 2522 states and 6917 transitions. [2021-07-13 18:26:51,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:51,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2522 states and 6917 transitions. [2021-07-13 18:26:51,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-07-13 18:26:51,675 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:51,675 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:26:51,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 18:26:51,884 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:51,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:51,884 INFO L82 PathProgramCache]: Analyzing trace with hash -762781351, now seen corresponding path program 16 times [2021-07-13 18:26:51,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:51,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173732994] [2021-07-13 18:26:51,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:52,078 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:52,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:52,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173732994] [2021-07-13 18:26:52,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173732994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:52,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568719479] [2021-07-13 18:26:52,079 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:52,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:26:52,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:52,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 18:26:52,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:52,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568719479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:52,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:52,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-07-13 18:26:52,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221847721] [2021-07-13 18:26:52,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 18:26:52,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:52,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 18:26:52,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-07-13 18:26:52,328 INFO L87 Difference]: Start difference. First operand 2522 states and 6917 transitions. Second operand has 25 states, 25 states have (on average 5.12) internal successors, (128), 25 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:53,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:53,167 INFO L93 Difference]: Finished difference Result 5070 states and 13899 transitions. [2021-07-13 18:26:53,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 18:26:53,168 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.12) internal successors, (128), 25 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-07-13 18:26:53,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:53,175 INFO L225 Difference]: With dead ends: 5070 [2021-07-13 18:26:53,175 INFO L226 Difference]: Without dead ends: 4566 [2021-07-13 18:26:53,176 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 780.2ms TimeCoverageRelationStatistics Valid=1258, Invalid=3164, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 18:26:53,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4566 states. [2021-07-13 18:26:53,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4566 to 2634. [2021-07-13 18:26:53,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2634 states, 2633 states have (on average 2.7406000759589824) internal successors, (7216), 2633 states have internal predecessors, (7216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:53,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 7216 transitions. [2021-07-13 18:26:53,223 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 7216 transitions. Word has length 125 [2021-07-13 18:26:53,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:53,223 INFO L482 AbstractCegarLoop]: Abstraction has 2634 states and 7216 transitions. [2021-07-13 18:26:53,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.12) internal successors, (128), 25 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:53,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 7216 transitions. [2021-07-13 18:26:53,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-07-13 18:26:53,227 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:53,227 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:26:53,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-13 18:26:53,441 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:53,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:53,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1964048435, now seen corresponding path program 17 times [2021-07-13 18:26:53,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:53,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298253481] [2021-07-13 18:26:53,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-13 18:26:53,452 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-13 18:26:53,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-13 18:26:53,487 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-13 18:26:53,511 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-07-13 18:26:53,512 INFO L609 BasicCegarLoop]: Counterexample might be feasible [2021-07-13 18:26:53,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-07-13 18:26:53,514 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 18:26:53,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 06:26:53 BasicIcfg [2021-07-13 18:26:53,607 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 18:26:53,607 INFO L168 Benchmark]: Toolchain (without parser) took 22401.27 ms. Allocated memory was 185.6 MB in the beginning and 616.6 MB in the end (delta: 431.0 MB). Free memory was 148.9 MB in the beginning and 572.3 MB in the end (delta: -423.4 MB). Peak memory consumption was 357.5 MB. Max. memory is 8.0 GB. [2021-07-13 18:26:53,607 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 185.6 MB. Free memory is still 167.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 18:26:53,607 INFO L168 Benchmark]: CACSL2BoogieTranslator took 384.17 ms. Allocated memory is still 185.6 MB. Free memory was 148.8 MB in the beginning and 159.7 MB in the end (delta: -10.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-07-13 18:26:53,607 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.76 ms. Allocated memory is still 185.6 MB. Free memory was 159.7 MB in the beginning and 157.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 18:26:53,607 INFO L168 Benchmark]: Boogie Preprocessor took 25.12 ms. Allocated memory is still 185.6 MB. Free memory was 157.7 MB in the beginning and 156.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 18:26:53,607 INFO L168 Benchmark]: RCFGBuilder took 304.96 ms. Allocated memory is still 185.6 MB. Free memory was 156.5 MB in the beginning and 135.0 MB in the end (delta: 21.4 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-07-13 18:26:53,607 INFO L168 Benchmark]: TraceAbstraction took 21638.71 ms. Allocated memory was 185.6 MB in the beginning and 616.6 MB in the end (delta: 431.0 MB). Free memory was 134.6 MB in the beginning and 572.3 MB in the end (delta: -437.7 MB). Peak memory consumption was 343.3 MB. Max. memory is 8.0 GB. [2021-07-13 18:26:53,608 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 185.6 MB. Free memory is still 167.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 384.17 ms. Allocated memory is still 185.6 MB. Free memory was 148.8 MB in the beginning and 159.7 MB in the end (delta: -10.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 40.76 ms. Allocated memory is still 185.6 MB. Free memory was 159.7 MB in the beginning and 157.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.12 ms. Allocated memory is still 185.6 MB. Free memory was 157.7 MB in the beginning and 156.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 304.96 ms. Allocated memory is still 185.6 MB. Free memory was 156.5 MB in the beginning and 135.0 MB in the end (delta: 21.4 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 21638.71 ms. Allocated memory was 185.6 MB in the beginning and 616.6 MB in the end (delta: 431.0 MB). Free memory was 134.6 MB in the beginning and 572.3 MB in the end (delta: -437.7 MB). Peak memory consumption was 343.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; VAL [i=3, j=6] [L712] 0 pthread_t id1, id2; VAL [i=3, j=6] [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1, k++=0] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1, k++=0] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1, k++=1] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2, k++=1] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3, k++=2] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3, k++=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4, k++=3] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4, k++=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=5, k=4] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=4] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=4, k++=4] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=4, k++=4] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=6, k=5] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=5] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=6, k++=5] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=5, k++=5] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=7] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=7, k++=6] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=6, k++=6] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=8, k=7] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=8] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=8, k++=7] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=7, k++=7] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=8] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=9] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=8, k++=8] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=9, k++=8] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L716] 0 int condI = i >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L719] 0 int condJ = j >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L721] COND TRUE 0 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L722] 0 reach_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 21470.7ms, OverallIterations: 24, TraceHistogramMax: 10, EmptinessCheckTime: 77.4ms, AutomataDifference: 9886.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 48.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2502 SDtfs, 14347 SDslu, 16504 SDs, 0 SdLazy, 3118 SolverSat, 1532 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1713.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2320 GetRequests, 1515 SyntacticMatches, 0 SemanticMatches, 805 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9255 ImplicationChecksByTransitivity, 8368.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3778occurred in iteration=21, InterpolantAutomatonStates: 648, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 927.5ms AutomataMinimizationTime, 23 MinimizatonAttempts, 14939 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 222.4ms SsaConstructionTime, 594.1ms SatisfiabilityAnalysisTime, 4796.2ms InterpolantComputationTime, 3344 NumberOfCodeBlocks, 3344 NumberOfCodeBlocksAsserted, 88 NumberOfCheckSat, 3173 ConstructedInterpolants, 0 QuantifiedInterpolants, 9627 SizeOfPredicates, 213 NumberOfNonLiveVariables, 3288 ConjunctsInSsa, 311 ConjunctsInUnsatCore, 41 InterpolantComputations, 5 PerfectInterpolantSequences, 0/4506 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...