/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 21:55:16,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 21:55:16,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 21:55:16,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 21:55:16,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-21 21:55:16,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-21 21:55:16,401 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-21 21:55:16,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-21 21:55:16,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-21 21:55:16,404 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-21 21:55:16,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-21 21:55:16,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-21 21:55:16,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-21 21:55:16,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-21 21:55:16,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-21 21:55:16,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-21 21:55:16,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-21 21:55:16,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-21 21:55:16,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-21 21:55:16,421 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-21 21:55:16,422 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-05-21 21:55:16,435 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 21:55:16,435 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 21:55:16,435 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 21:55:16,435 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 21:55:16,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 21:55:16,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 21:55:16,436 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 21:55:16,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 21:55:16,437 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 21:55:16,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 21:55:16,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 21:55:16,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 21:55:16,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 21:55:16,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 21:55:16,437 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 21:55:16,437 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 21:55:16,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 21:55:16,438 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 21:55:16,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 21:55:16,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 21:55:16,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 21:55:16,438 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 21:55:16,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 21:55:16,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 21:55:16,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 21:55:16,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 21:55:16,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 21:55:16,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 21:55:16,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 21:55:16,439 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 21:55:16,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 21:55:16,439 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-21 21:55:16,439 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 21:55:16,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 21:55:16,650 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 21:55:16,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 21:55:16,652 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-21 21:55:16,653 INFO L275 PluginConnector]: CDTParser initialized [2021-05-21 21:55:16,653 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2021-05-21 21:55:16,687 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3999e480e/ffa142ee17c4492284c4c82105392e93/FLAGf54cc2823 [2021-05-21 21:55:17,090 INFO L306 CDTParser]: Found 1 translation units. [2021-05-21 21:55:17,091 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2021-05-21 21:55:17,098 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3999e480e/ffa142ee17c4492284c4c82105392e93/FLAGf54cc2823 [2021-05-21 21:55:17,106 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3999e480e/ffa142ee17c4492284c4c82105392e93 [2021-05-21 21:55:17,108 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 21:55:17,109 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-21 21:55:17,110 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-21 21:55:17,110 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-21 21:55:17,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-21 21:55:17,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.05 09:55:17" (1/1) ... [2021-05-21 21:55:17,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20c7b6da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:55:17, skipping insertion in model container [2021-05-21 21:55:17,113 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.05 09:55:17" (1/1) ... [2021-05-21 21:55:17,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-21 21:55:17,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-21 21:55:17,392 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i[30950,30963] [2021-05-21 21:55:17,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-21 21:55:17,403 INFO L203 MainTranslator]: Completed pre-run [2021-05-21 21:55:17,437 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i[30950,30963] [2021-05-21 21:55:17,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-21 21:55:17,480 INFO L208 MainTranslator]: Completed translation [2021-05-21 21:55:17,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:55:17 WrapperNode [2021-05-21 21:55:17,481 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-21 21:55:17,482 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 21:55:17,482 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 21:55:17,482 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 21:55:17,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:55:17" (1/1) ... [2021-05-21 21:55:17,493 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:55:17" (1/1) ... [2021-05-21 21:55:17,504 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 21:55:17,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 21:55:17,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 21:55:17,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 21:55:17,509 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:55:17" (1/1) ... [2021-05-21 21:55:17,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:55:17" (1/1) ... [2021-05-21 21:55:17,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:55:17" (1/1) ... [2021-05-21 21:55:17,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:55:17" (1/1) ... [2021-05-21 21:55:17,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:55:17" (1/1) ... [2021-05-21 21:55:17,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:55:17" (1/1) ... [2021-05-21 21:55:17,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:55:17" (1/1) ... [2021-05-21 21:55:17,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 21:55:17,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 21:55:17,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 21:55:17,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 21:55:17,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:55:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 21:55:17,571 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-05-21 21:55:17,571 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-05-21 21:55:17,571 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-05-21 21:55:17,571 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-05-21 21:55:17,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-21 21:55:17,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-05-21 21:55:17,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-21 21:55:17,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-21 21:55:17,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-21 21:55:17,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-05-21 21:55:17,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 21:55:17,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 21:55:17,573 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 21:55:17,836 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 21:55:17,836 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-05-21 21:55:17,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:55:17 BoogieIcfgContainer [2021-05-21 21:55:17,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 21:55:17,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 21:55:17,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 21:55:17,840 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 21:55:17,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.05 09:55:17" (1/3) ... [2021-05-21 21:55:17,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d017765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 09:55:17, skipping insertion in model container [2021-05-21 21:55:17,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:55:17" (2/3) ... [2021-05-21 21:55:17,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d017765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 09:55:17, skipping insertion in model container [2021-05-21 21:55:17,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:55:17" (3/3) ... [2021-05-21 21:55:17,842 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2021-05-21 21:55:17,845 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 21:55:17,846 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 21:55:17,846 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 21:55:17,846 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 21:55:17,870 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,870 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,871 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,871 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,871 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,871 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,871 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,871 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,872 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,872 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,873 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,873 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,873 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,873 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,873 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,873 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,874 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,874 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,874 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,874 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,874 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,875 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,875 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,875 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,875 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,876 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,876 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,876 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,876 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,876 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,876 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,876 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,877 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,877 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,877 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,877 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,877 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,878 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,878 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,878 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,878 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,878 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,878 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,879 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,879 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,879 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,879 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,879 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,879 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,879 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,879 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,879 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,880 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,880 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,881 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,881 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,882 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,882 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,883 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,883 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,883 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,883 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,889 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,889 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,889 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,889 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,889 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,889 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:17,891 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-21 21:55:17,905 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-21 21:55:17,923 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 21:55:17,924 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 21:55:17,924 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 21:55:17,924 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 21:55:17,924 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 21:55:17,924 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 21:55:17,924 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 21:55:17,924 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 21:55:17,933 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-05-21 21:55:18,003 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:18,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:18,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 21:55:18,017 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:18,018 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:18,018 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:18,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:18,022 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-05-21 21:55:18,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:18,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338281130] [2021-05-21 21:55:18,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:18,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:18,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:18,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:18,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338281130] [2021-05-21 21:55:18,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338281130] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:55:18,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:55:18,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 21:55:18,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89741497] [2021-05-21 21:55:18,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:55:18,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:18,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:55:18,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:55:18,322 INFO L87 Difference]: Start difference. First operand has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:18,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:18,482 INFO L93 Difference]: Finished difference Result 3467 states and 10030 transitions. [2021-05-21 21:55:18,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:55:18,484 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 21:55:18,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:18,505 INFO L225 Difference]: With dead ends: 3467 [2021-05-21 21:55:18,505 INFO L226 Difference]: Without dead ends: 1242 [2021-05-21 21:55:18,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:55:18,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-05-21 21:55:18,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 942. [2021-05-21 21:55:18,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 941 states have (on average 2.7077577045696066) internal successors, (2548), 941 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:18,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 2548 transitions. [2021-05-21 21:55:18,590 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 2548 transitions. Word has length 32 [2021-05-21 21:55:18,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:18,590 INFO L482 AbstractCegarLoop]: Abstraction has 942 states and 2548 transitions. [2021-05-21 21:55:18,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:18,590 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 2548 transitions. [2021-05-21 21:55:18,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-21 21:55:18,595 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:18,595 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:18,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 21:55:18,596 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:18,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:18,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1720134605, now seen corresponding path program 1 times [2021-05-21 21:55:18,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:18,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138604082] [2021-05-21 21:55:18,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:18,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:18,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:18,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138604082] [2021-05-21 21:55:18,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138604082] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:55:18,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:55:18,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 21:55:18,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918055476] [2021-05-21 21:55:18,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:55:18,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:18,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:55:18,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:55:18,729 INFO L87 Difference]: Start difference. First operand 942 states and 2548 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:18,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:18,808 INFO L93 Difference]: Finished difference Result 1194 states and 3180 transitions. [2021-05-21 21:55:18,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:55:18,809 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-21 21:55:18,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:18,815 INFO L225 Difference]: With dead ends: 1194 [2021-05-21 21:55:18,815 INFO L226 Difference]: Without dead ends: 942 [2021-05-21 21:55:18,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:55:18,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-05-21 21:55:18,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 800. [2021-05-21 21:55:18,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.728410513141427) internal successors, (2180), 799 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:18,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-05-21 21:55:18,833 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 36 [2021-05-21 21:55:18,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:18,834 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-05-21 21:55:18,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:18,835 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-05-21 21:55:18,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-21 21:55:18,836 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:18,836 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:18,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 21:55:18,836 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:18,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:18,843 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-05-21 21:55:18,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:18,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570316986] [2021-05-21 21:55:18,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:18,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:18,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:18,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570316986] [2021-05-21 21:55:18,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570316986] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:55:18,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:55:18,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 21:55:18,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599746781] [2021-05-21 21:55:18,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:55:18,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:18,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:55:18,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:55:18,954 INFO L87 Difference]: Start difference. First operand 800 states and 2180 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:19,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:19,066 INFO L93 Difference]: Finished difference Result 1302 states and 3436 transitions. [2021-05-21 21:55:19,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:55:19,066 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-21 21:55:19,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:19,069 INFO L225 Difference]: With dead ends: 1302 [2021-05-21 21:55:19,069 INFO L226 Difference]: Without dead ends: 920 [2021-05-21 21:55:19,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:55:19,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-05-21 21:55:19,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-05-21 21:55:19,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.6882966396292005) internal successors, (2320), 863 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:19,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-05-21 21:55:19,091 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-05-21 21:55:19,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:19,091 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-05-21 21:55:19,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:19,091 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-05-21 21:55:19,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-21 21:55:19,094 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:19,094 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:19,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 21:55:19,094 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:19,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:19,095 INFO L82 PathProgramCache]: Analyzing trace with hash 307394794, now seen corresponding path program 1 times [2021-05-21 21:55:19,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:19,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695963444] [2021-05-21 21:55:19,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:19,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:19,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695963444] [2021-05-21 21:55:19,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695963444] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:55:19,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:55:19,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 21:55:19,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799139500] [2021-05-21 21:55:19,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 21:55:19,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:19,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 21:55:19,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:55:19,171 INFO L87 Difference]: Start difference. First operand 864 states and 2320 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:19,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:19,227 INFO L93 Difference]: Finished difference Result 1332 states and 3512 transitions. [2021-05-21 21:55:19,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:55:19,229 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-05-21 21:55:19,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:19,233 INFO L225 Difference]: With dead ends: 1332 [2021-05-21 21:55:19,234 INFO L226 Difference]: Without dead ends: 1072 [2021-05-21 21:55:19,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:55:19,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-05-21 21:55:19,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 876. [2021-05-21 21:55:19,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.7062857142857144) internal successors, (2368), 875 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:19,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-05-21 21:55:19,252 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-05-21 21:55:19,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:19,257 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-05-21 21:55:19,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:19,257 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-05-21 21:55:19,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-21 21:55:19,258 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:19,258 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:19,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 21:55:19,258 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:19,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:19,259 INFO L82 PathProgramCache]: Analyzing trace with hash -258094508, now seen corresponding path program 2 times [2021-05-21 21:55:19,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:19,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049938423] [2021-05-21 21:55:19,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:19,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:19,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:19,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049938423] [2021-05-21 21:55:19,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049938423] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:55:19,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:55:19,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 21:55:19,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428779178] [2021-05-21 21:55:19,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:55:19,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:19,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:55:19,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:55:19,340 INFO L87 Difference]: Start difference. First operand 876 states and 2368 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:19,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:19,420 INFO L93 Difference]: Finished difference Result 1772 states and 4744 transitions. [2021-05-21 21:55:19,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:55:19,421 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-05-21 21:55:19,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:19,425 INFO L225 Difference]: With dead ends: 1772 [2021-05-21 21:55:19,425 INFO L226 Difference]: Without dead ends: 1505 [2021-05-21 21:55:19,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:55:19,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-05-21 21:55:19,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 975. [2021-05-21 21:55:19,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 2.6981519507186857) internal successors, (2628), 974 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:19,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2628 transitions. [2021-05-21 21:55:19,443 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2628 transitions. Word has length 40 [2021-05-21 21:55:19,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:19,443 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 2628 transitions. [2021-05-21 21:55:19,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:19,444 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2628 transitions. [2021-05-21 21:55:19,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-21 21:55:19,444 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:19,444 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:19,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 21:55:19,445 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:19,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:19,445 INFO L82 PathProgramCache]: Analyzing trace with hash 129784312, now seen corresponding path program 3 times [2021-05-21 21:55:19,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:19,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176678448] [2021-05-21 21:55:19,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:19,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:19,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:19,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176678448] [2021-05-21 21:55:19,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176678448] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:55:19,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:55:19,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 21:55:19,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176374081] [2021-05-21 21:55:19,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 21:55:19,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:19,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 21:55:19,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:55:19,497 INFO L87 Difference]: Start difference. First operand 975 states and 2628 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:19,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:19,575 INFO L93 Difference]: Finished difference Result 2211 states and 5878 transitions. [2021-05-21 21:55:19,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:55:19,575 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-05-21 21:55:19,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:19,581 INFO L225 Difference]: With dead ends: 2211 [2021-05-21 21:55:19,582 INFO L226 Difference]: Without dead ends: 1944 [2021-05-21 21:55:19,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:55:19,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-05-21 21:55:19,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1127. [2021-05-21 21:55:19,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1126 states have (on average 2.769982238010657) internal successors, (3119), 1126 states have internal predecessors, (3119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:19,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3119 transitions. [2021-05-21 21:55:19,604 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3119 transitions. Word has length 40 [2021-05-21 21:55:19,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:19,604 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 3119 transitions. [2021-05-21 21:55:19,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:19,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3119 transitions. [2021-05-21 21:55:19,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-21 21:55:19,605 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:19,605 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:19,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-21 21:55:19,605 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:19,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:19,605 INFO L82 PathProgramCache]: Analyzing trace with hash 152127562, now seen corresponding path program 4 times [2021-05-21 21:55:19,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:19,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626101833] [2021-05-21 21:55:19,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:19,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:19,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626101833] [2021-05-21 21:55:19,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626101833] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:55:19,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:55:19,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 21:55:19,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292414379] [2021-05-21 21:55:19,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 21:55:19,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:19,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 21:55:19,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:55:19,649 INFO L87 Difference]: Start difference. First operand 1127 states and 3119 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:19,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:19,761 INFO L93 Difference]: Finished difference Result 1519 states and 4031 transitions. [2021-05-21 21:55:19,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:55:19,761 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-05-21 21:55:19,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:19,765 INFO L225 Difference]: With dead ends: 1519 [2021-05-21 21:55:19,765 INFO L226 Difference]: Without dead ends: 1138 [2021-05-21 21:55:19,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:55:19,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-05-21 21:55:19,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1033. [2021-05-21 21:55:19,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 2.73546511627907) internal successors, (2823), 1032 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:19,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2823 transitions. [2021-05-21 21:55:19,807 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2823 transitions. Word has length 40 [2021-05-21 21:55:19,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:19,807 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 2823 transitions. [2021-05-21 21:55:19,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:19,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2823 transitions. [2021-05-21 21:55:19,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 21:55:19,808 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:19,808 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:19,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-21 21:55:19,809 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:19,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:19,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1301576209, now seen corresponding path program 1 times [2021-05-21 21:55:19,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:19,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199185504] [2021-05-21 21:55:19,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:19,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:19,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199185504] [2021-05-21 21:55:19,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199185504] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:19,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078249227] [2021-05-21 21:55:19,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:19,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:55:19,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:20,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078249227] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:20,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:20,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 21:55:20,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962171247] [2021-05-21 21:55:20,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:55:20,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:20,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:55:20,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:55:20,102 INFO L87 Difference]: Start difference. First operand 1033 states and 2823 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:20,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:20,237 INFO L93 Difference]: Finished difference Result 1451 states and 3787 transitions. [2021-05-21 21:55:20,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:55:20,238 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-21 21:55:20,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:20,241 INFO L225 Difference]: With dead ends: 1451 [2021-05-21 21:55:20,241 INFO L226 Difference]: Without dead ends: 1181 [2021-05-21 21:55:20,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 129.6ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:55:20,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-05-21 21:55:20,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1083. [2021-05-21 21:55:20,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 1082 states have (on average 2.7060998151571165) internal successors, (2928), 1082 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:20,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 2928 transitions. [2021-05-21 21:55:20,264 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 2928 transitions. Word has length 45 [2021-05-21 21:55:20,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:20,264 INFO L482 AbstractCegarLoop]: Abstraction has 1083 states and 2928 transitions. [2021-05-21 21:55:20,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:20,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 2928 transitions. [2021-05-21 21:55:20,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 21:55:20,265 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:20,265 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:20,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-21 21:55:20,487 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:20,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:20,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1689455029, now seen corresponding path program 2 times [2021-05-21 21:55:20,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:20,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537190946] [2021-05-21 21:55:20,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:20,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:20,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:20,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537190946] [2021-05-21 21:55:20,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537190946] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:20,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44459865] [2021-05-21 21:55:20,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:20,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:55:20,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:20,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:55:20,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:20,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:20,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44459865] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:20,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:20,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-21 21:55:20,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075822844] [2021-05-21 21:55:20,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:55:20,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:20,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:55:20,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:55:20,716 INFO L87 Difference]: Start difference. First operand 1083 states and 2928 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:20,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:20,822 INFO L93 Difference]: Finished difference Result 2333 states and 6191 transitions. [2021-05-21 21:55:20,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:55:20,822 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-21 21:55:20,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:20,831 INFO L225 Difference]: With dead ends: 2333 [2021-05-21 21:55:20,832 INFO L226 Difference]: Without dead ends: 2063 [2021-05-21 21:55:20,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:55:20,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-05-21 21:55:20,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1218. [2021-05-21 21:55:20,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 2.7666392769104355) internal successors, (3367), 1217 states have internal predecessors, (3367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:20,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 3367 transitions. [2021-05-21 21:55:20,856 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 3367 transitions. Word has length 45 [2021-05-21 21:55:20,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:20,856 INFO L482 AbstractCegarLoop]: Abstraction has 1218 states and 3367 transitions. [2021-05-21 21:55:20,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:20,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 3367 transitions. [2021-05-21 21:55:20,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 21:55:20,857 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:20,857 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:21,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:21,077 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:21,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:21,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1711798279, now seen corresponding path program 3 times [2021-05-21 21:55:21,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:21,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937118760] [2021-05-21 21:55:21,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:21,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:21,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:21,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:21,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937118760] [2021-05-21 21:55:21,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937118760] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:21,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974971405] [2021-05-21 21:55:21,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:21,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 21:55:21,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:21,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:55:21,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:21,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:21,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974971405] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:21,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:21,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 21:55:21,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651153273] [2021-05-21 21:55:21,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:55:21,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:21,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:55:21,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:55:21,292 INFO L87 Difference]: Start difference. First operand 1218 states and 3367 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:21,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:21,557 INFO L93 Difference]: Finished difference Result 2121 states and 5621 transitions. [2021-05-21 21:55:21,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:55:21,558 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-21 21:55:21,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:21,563 INFO L225 Difference]: With dead ends: 2121 [2021-05-21 21:55:21,563 INFO L226 Difference]: Without dead ends: 1546 [2021-05-21 21:55:21,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 198.6ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:55:21,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2021-05-21 21:55:21,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1253. [2021-05-21 21:55:21,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 2.7619808306709266) internal successors, (3458), 1252 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:21,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 3458 transitions. [2021-05-21 21:55:21,583 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 3458 transitions. Word has length 45 [2021-05-21 21:55:21,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:21,583 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 3458 transitions. [2021-05-21 21:55:21,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:21,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 3458 transitions. [2021-05-21 21:55:21,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 21:55:21,584 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:21,584 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:21,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-21 21:55:21,785 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:21,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:21,785 INFO L82 PathProgramCache]: Analyzing trace with hash 315802636, now seen corresponding path program 1 times [2021-05-21 21:55:21,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:21,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362393517] [2021-05-21 21:55:21,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:21,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:21,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:21,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362393517] [2021-05-21 21:55:21,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362393517] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:21,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984296441] [2021-05-21 21:55:21,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:21,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:21,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:55:21,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:21,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984296441] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:21,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:21,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 21:55:21,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449689151] [2021-05-21 21:55:21,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:55:21,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:21,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:55:21,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:55:21,959 INFO L87 Difference]: Start difference. First operand 1253 states and 3458 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:22,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:22,076 INFO L93 Difference]: Finished difference Result 2398 states and 6444 transitions. [2021-05-21 21:55:22,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:55:22,076 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-21 21:55:22,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:22,082 INFO L225 Difference]: With dead ends: 2398 [2021-05-21 21:55:22,082 INFO L226 Difference]: Without dead ends: 1926 [2021-05-21 21:55:22,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:55:22,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-05-21 21:55:22,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1456. [2021-05-21 21:55:22,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 2.727835051546392) internal successors, (3969), 1455 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:22,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 3969 transitions. [2021-05-21 21:55:22,117 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 3969 transitions. Word has length 45 [2021-05-21 21:55:22,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:22,117 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 3969 transitions. [2021-05-21 21:55:22,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:22,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 3969 transitions. [2021-05-21 21:55:22,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:55:22,121 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:22,121 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:22,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:22,341 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:22,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:22,342 INFO L82 PathProgramCache]: Analyzing trace with hash 456189922, now seen corresponding path program 1 times [2021-05-21 21:55:22,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:22,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804568827] [2021-05-21 21:55:22,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:22,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:22,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804568827] [2021-05-21 21:55:22,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804568827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:22,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139103988] [2021-05-21 21:55:22,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:22,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:22,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:55:22,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:22,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:22,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139103988] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:22,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:22,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-05-21 21:55:22,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486483675] [2021-05-21 21:55:22,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:55:22,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:22,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:55:22,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:55:22,585 INFO L87 Difference]: Start difference. First operand 1456 states and 3969 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:22,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:22,699 INFO L93 Difference]: Finished difference Result 1866 states and 4917 transitions. [2021-05-21 21:55:22,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:55:22,699 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 21:55:22,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:22,704 INFO L225 Difference]: With dead ends: 1866 [2021-05-21 21:55:22,704 INFO L226 Difference]: Without dead ends: 1596 [2021-05-21 21:55:22,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:55:22,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-05-21 21:55:22,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1531. [2021-05-21 21:55:22,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 2.6921568627450982) internal successors, (4119), 1530 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:22,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4119 transitions. [2021-05-21 21:55:22,725 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4119 transitions. Word has length 55 [2021-05-21 21:55:22,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:22,726 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4119 transitions. [2021-05-21 21:55:22,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:22,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4119 transitions. [2021-05-21 21:55:22,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:55:22,727 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:22,727 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:22,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-21 21:55:22,941 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:22,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:22,941 INFO L82 PathProgramCache]: Analyzing trace with hash 117785766, now seen corresponding path program 2 times [2021-05-21 21:55:22,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:22,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785961454] [2021-05-21 21:55:22,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:22,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:22,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:22,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:22,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785961454] [2021-05-21 21:55:22,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785961454] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:22,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798549144] [2021-05-21 21:55:22,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:23,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:55:23,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:23,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:55:23,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:23,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798549144] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:23,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:23,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-21 21:55:23,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931048895] [2021-05-21 21:55:23,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:55:23,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:23,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:55:23,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:55:23,133 INFO L87 Difference]: Start difference. First operand 1531 states and 4119 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:23,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:23,256 INFO L93 Difference]: Finished difference Result 1981 states and 5147 transitions. [2021-05-21 21:55:23,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:55:23,256 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 21:55:23,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:23,263 INFO L225 Difference]: With dead ends: 1981 [2021-05-21 21:55:23,263 INFO L226 Difference]: Without dead ends: 1711 [2021-05-21 21:55:23,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:55:23,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2021-05-21 21:55:23,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1531. [2021-05-21 21:55:23,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 2.6921568627450982) internal successors, (4119), 1530 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:23,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4119 transitions. [2021-05-21 21:55:23,284 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4119 transitions. Word has length 55 [2021-05-21 21:55:23,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:23,284 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4119 transitions. [2021-05-21 21:55:23,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:23,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4119 transitions. [2021-05-21 21:55:23,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:55:23,286 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:23,286 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:23,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:23,501 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:23,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:23,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1597456522, now seen corresponding path program 3 times [2021-05-21 21:55:23,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:23,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568838010] [2021-05-21 21:55:23,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:23,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:23,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:23,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568838010] [2021-05-21 21:55:23,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568838010] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:23,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910691222] [2021-05-21 21:55:23,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:23,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:55:23,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:23,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:55:23,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:23,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910691222] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:23,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:23,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-05-21 21:55:23,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409177388] [2021-05-21 21:55:23,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:55:23,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:23,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:55:23,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:55:23,734 INFO L87 Difference]: Start difference. First operand 1531 states and 4119 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:23,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:23,913 INFO L93 Difference]: Finished difference Result 2669 states and 6993 transitions. [2021-05-21 21:55:23,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 21:55:23,913 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 21:55:23,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:23,917 INFO L225 Difference]: With dead ends: 2669 [2021-05-21 21:55:23,917 INFO L226 Difference]: Without dead ends: 2046 [2021-05-21 21:55:23,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 148.2ms TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:55:23,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-05-21 21:55:23,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1561. [2021-05-21 21:55:23,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 2.7205128205128206) internal successors, (4244), 1560 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:23,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 4244 transitions. [2021-05-21 21:55:23,938 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 4244 transitions. Word has length 55 [2021-05-21 21:55:23,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:23,938 INFO L482 AbstractCegarLoop]: Abstraction has 1561 states and 4244 transitions. [2021-05-21 21:55:23,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:23,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 4244 transitions. [2021-05-21 21:55:23,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:55:23,940 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:23,940 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:24,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-21 21:55:24,153 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:24,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:24,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1664863172, now seen corresponding path program 4 times [2021-05-21 21:55:24,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:24,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491441324] [2021-05-21 21:55:24,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:24,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:24,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491441324] [2021-05-21 21:55:24,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491441324] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:24,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901907356] [2021-05-21 21:55:24,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:24,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:55:24,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:24,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:55:24,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:24,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:24,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901907356] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:24,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:24,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-21 21:55:24,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338212811] [2021-05-21 21:55:24,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:55:24,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:24,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:55:24,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:55:24,332 INFO L87 Difference]: Start difference. First operand 1561 states and 4244 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:24,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:24,494 INFO L93 Difference]: Finished difference Result 2878 states and 7671 transitions. [2021-05-21 21:55:24,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:55:24,494 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 21:55:24,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:24,498 INFO L225 Difference]: With dead ends: 2878 [2021-05-21 21:55:24,498 INFO L226 Difference]: Without dead ends: 2608 [2021-05-21 21:55:24,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 117.7ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:55:24,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-05-21 21:55:24,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 1741. [2021-05-21 21:55:24,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1740 states have (on average 2.760344827586207) internal successors, (4803), 1740 states have internal predecessors, (4803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:24,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 4803 transitions. [2021-05-21 21:55:24,525 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 4803 transitions. Word has length 55 [2021-05-21 21:55:24,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:24,525 INFO L482 AbstractCegarLoop]: Abstraction has 1741 states and 4803 transitions. [2021-05-21 21:55:24,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:24,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 4803 transitions. [2021-05-21 21:55:24,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:55:24,527 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:24,527 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:24,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-21 21:55:24,741 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:24,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:24,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1687206422, now seen corresponding path program 5 times [2021-05-21 21:55:24,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:24,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555253398] [2021-05-21 21:55:24,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:24,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:24,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:24,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555253398] [2021-05-21 21:55:24,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555253398] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:24,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636083627] [2021-05-21 21:55:24,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:24,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:55:24,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:24,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:55:24,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:24,957 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:24,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636083627] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:24,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:24,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-05-21 21:55:24,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230695740] [2021-05-21 21:55:24,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:55:24,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:24,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:55:24,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:55:24,958 INFO L87 Difference]: Start difference. First operand 1741 states and 4803 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:25,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:25,223 INFO L93 Difference]: Finished difference Result 2821 states and 7531 transitions. [2021-05-21 21:55:25,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 21:55:25,223 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 21:55:25,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:25,227 INFO L225 Difference]: With dead ends: 2821 [2021-05-21 21:55:25,227 INFO L226 Difference]: Without dead ends: 2246 [2021-05-21 21:55:25,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 214.1ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:55:25,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-05-21 21:55:25,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 1656. [2021-05-21 21:55:25,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 2.730513595166163) internal successors, (4519), 1655 states have internal predecessors, (4519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:25,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 4519 transitions. [2021-05-21 21:55:25,259 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 4519 transitions. Word has length 55 [2021-05-21 21:55:25,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:25,260 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 4519 transitions. [2021-05-21 21:55:25,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:25,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 4519 transitions. [2021-05-21 21:55:25,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:55:25,263 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:25,263 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:25,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-21 21:55:25,479 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:25,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:25,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1535924432, now seen corresponding path program 6 times [2021-05-21 21:55:25,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:25,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682675607] [2021-05-21 21:55:25,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:25,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:25,537 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:55:25,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:25,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682675607] [2021-05-21 21:55:25,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682675607] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:25,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870744009] [2021-05-21 21:55:25,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:25,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 21:55:25,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:25,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:55:25,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:25,686 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:55:25,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870744009] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:25,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:25,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-05-21 21:55:25,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364072840] [2021-05-21 21:55:25,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:55:25,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:25,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:55:25,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:55:25,687 INFO L87 Difference]: Start difference. First operand 1656 states and 4519 transitions. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:25,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:25,802 INFO L93 Difference]: Finished difference Result 2561 states and 6649 transitions. [2021-05-21 21:55:25,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:55:25,802 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 21:55:25,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:25,805 INFO L225 Difference]: With dead ends: 2561 [2021-05-21 21:55:25,805 INFO L226 Difference]: Without dead ends: 2212 [2021-05-21 21:55:25,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:55:25,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-05-21 21:55:25,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1658. [2021-05-21 21:55:25,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 2.7296318648159326) internal successors, (4523), 1657 states have internal predecessors, (4523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:25,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 4523 transitions. [2021-05-21 21:55:25,828 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 4523 transitions. Word has length 55 [2021-05-21 21:55:25,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:25,829 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 4523 transitions. [2021-05-21 21:55:25,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:25,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 4523 transitions. [2021-05-21 21:55:25,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:55:25,830 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:25,830 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:26,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-21 21:55:26,046 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:26,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:26,047 INFO L82 PathProgramCache]: Analyzing trace with hash 8869516, now seen corresponding path program 7 times [2021-05-21 21:55:26,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:26,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170664105] [2021-05-21 21:55:26,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:26,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:26,092 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:55:26,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:26,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170664105] [2021-05-21 21:55:26,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170664105] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:26,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591241088] [2021-05-21 21:55:26,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:26,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:55:26,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:26,231 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:55:26,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591241088] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:26,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:26,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-21 21:55:26,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108364563] [2021-05-21 21:55:26,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:55:26,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:26,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:55:26,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:55:26,233 INFO L87 Difference]: Start difference. First operand 1658 states and 4523 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:26,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:26,311 INFO L93 Difference]: Finished difference Result 2311 states and 5957 transitions. [2021-05-21 21:55:26,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:55:26,312 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 21:55:26,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:26,315 INFO L225 Difference]: With dead ends: 2311 [2021-05-21 21:55:26,315 INFO L226 Difference]: Without dead ends: 2026 [2021-05-21 21:55:26,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:55:26,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2021-05-21 21:55:26,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1638. [2021-05-21 21:55:26,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 2.7385461209529627) internal successors, (4483), 1637 states have internal predecessors, (4483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:26,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 4483 transitions. [2021-05-21 21:55:26,338 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 4483 transitions. Word has length 55 [2021-05-21 21:55:26,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:26,338 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 4483 transitions. [2021-05-21 21:55:26,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:26,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 4483 transitions. [2021-05-21 21:55:26,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:55:26,340 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:26,340 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:26,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:26,556 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:26,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:26,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1697636932, now seen corresponding path program 8 times [2021-05-21 21:55:26,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:26,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822783361] [2021-05-21 21:55:26,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:26,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:55:26,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:26,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822783361] [2021-05-21 21:55:26,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822783361] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:26,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768870946] [2021-05-21 21:55:26,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:26,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:55:26,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:26,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:55:26,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:26,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:55:26,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768870946] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:26,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:26,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-05-21 21:55:26,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926095933] [2021-05-21 21:55:26,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:55:26,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:26,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:55:26,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:55:26,739 INFO L87 Difference]: Start difference. First operand 1638 states and 4483 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:26,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:26,872 INFO L93 Difference]: Finished difference Result 2246 states and 5827 transitions. [2021-05-21 21:55:26,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:55:26,872 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 21:55:26,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:26,875 INFO L225 Difference]: With dead ends: 2246 [2021-05-21 21:55:26,875 INFO L226 Difference]: Without dead ends: 1961 [2021-05-21 21:55:26,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:55:26,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-05-21 21:55:26,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1613. [2021-05-21 21:55:26,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 2.75) internal successors, (4433), 1612 states have internal predecessors, (4433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:26,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 4433 transitions. [2021-05-21 21:55:26,896 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 4433 transitions. Word has length 55 [2021-05-21 21:55:26,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:26,896 INFO L482 AbstractCegarLoop]: Abstraction has 1613 states and 4433 transitions. [2021-05-21 21:55:26,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:26,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 4433 transitions. [2021-05-21 21:55:26,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:55:26,897 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:26,897 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:27,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:27,115 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:27,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:27,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1496820963, now seen corresponding path program 9 times [2021-05-21 21:55:27,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:27,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678629152] [2021-05-21 21:55:27,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:27,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:27,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678629152] [2021-05-21 21:55:27,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678629152] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:27,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925299350] [2021-05-21 21:55:27,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:27,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:55:27,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:27,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:55:27,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:27,286 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:27,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925299350] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:27,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:27,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-05-21 21:55:27,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43399241] [2021-05-21 21:55:27,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:55:27,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:27,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:55:27,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:55:27,287 INFO L87 Difference]: Start difference. First operand 1613 states and 4433 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:27,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:27,489 INFO L93 Difference]: Finished difference Result 3288 states and 8870 transitions. [2021-05-21 21:55:27,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 21:55:27,489 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 21:55:27,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:27,493 INFO L225 Difference]: With dead ends: 3288 [2021-05-21 21:55:27,493 INFO L226 Difference]: Without dead ends: 2476 [2021-05-21 21:55:27,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 154.9ms TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:55:27,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2021-05-21 21:55:27,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 1856. [2021-05-21 21:55:27,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1855 states have (on average 2.7326145552560646) internal successors, (5069), 1855 states have internal predecessors, (5069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:27,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 5069 transitions. [2021-05-21 21:55:27,521 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 5069 transitions. Word has length 55 [2021-05-21 21:55:27,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:27,521 INFO L482 AbstractCegarLoop]: Abstraction has 1856 states and 5069 transitions. [2021-05-21 21:55:27,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:27,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 5069 transitions. [2021-05-21 21:55:27,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 21:55:27,539 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:27,540 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:27,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-21 21:55:27,753 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:27,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:27,753 INFO L82 PathProgramCache]: Analyzing trace with hash -2069953421, now seen corresponding path program 10 times [2021-05-21 21:55:27,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:27,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349113142] [2021-05-21 21:55:27,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:27,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:27,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:27,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349113142] [2021-05-21 21:55:27,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349113142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:27,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128176568] [2021-05-21 21:55:27,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:27,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:55:27,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:27,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:55:27,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:27,972 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:27,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128176568] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:27,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:27,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-05-21 21:55:27,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173879555] [2021-05-21 21:55:27,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:55:27,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:27,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:55:27,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:55:27,974 INFO L87 Difference]: Start difference. First operand 1856 states and 5069 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:28,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:28,129 INFO L93 Difference]: Finished difference Result 2316 states and 6117 transitions. [2021-05-21 21:55:28,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 21:55:28,129 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 21:55:28,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:28,132 INFO L225 Difference]: With dead ends: 2316 [2021-05-21 21:55:28,132 INFO L226 Difference]: Without dead ends: 2046 [2021-05-21 21:55:28,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:55:28,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-05-21 21:55:28,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1931. [2021-05-21 21:55:28,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:28,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-05-21 21:55:28,152 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-05-21 21:55:28,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:28,152 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-05-21 21:55:28,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:28,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-05-21 21:55:28,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 21:55:28,154 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:28,154 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:28,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:28,371 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:28,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:28,372 INFO L82 PathProgramCache]: Analyzing trace with hash -423019465, now seen corresponding path program 11 times [2021-05-21 21:55:28,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:28,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94204904] [2021-05-21 21:55:28,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:28,445 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:28,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:28,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94204904] [2021-05-21 21:55:28,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94204904] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:28,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976979033] [2021-05-21 21:55:28,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:28,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:55:28,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:28,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:55:28,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:28,583 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:28,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976979033] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:28,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:28,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-21 21:55:28,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122571404] [2021-05-21 21:55:28,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:55:28,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:28,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:55:28,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:55:28,584 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:28,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:28,734 INFO L93 Difference]: Finished difference Result 2481 states and 6447 transitions. [2021-05-21 21:55:28,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:55:28,734 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 21:55:28,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:28,737 INFO L225 Difference]: With dead ends: 2481 [2021-05-21 21:55:28,737 INFO L226 Difference]: Without dead ends: 2211 [2021-05-21 21:55:28,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 135.4ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:55:28,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-05-21 21:55:28,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 1931. [2021-05-21 21:55:28,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:28,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-05-21 21:55:28,758 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-05-21 21:55:28,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:28,758 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-05-21 21:55:28,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:28,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-05-21 21:55:28,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 21:55:28,760 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:28,760 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:28,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-21 21:55:28,976 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:28,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:28,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1607299847, now seen corresponding path program 12 times [2021-05-21 21:55:28,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:28,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706990508] [2021-05-21 21:55:28,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:29,065 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:29,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:29,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706990508] [2021-05-21 21:55:29,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706990508] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:29,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32399750] [2021-05-21 21:55:29,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:29,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:55:29,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:29,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:55:29,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:29,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32399750] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:29,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:29,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-05-21 21:55:29,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311241558] [2021-05-21 21:55:29,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:55:29,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:29,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:55:29,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:55:29,207 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:29,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:29,400 INFO L93 Difference]: Finished difference Result 2566 states and 6617 transitions. [2021-05-21 21:55:29,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 21:55:29,401 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 21:55:29,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:29,404 INFO L225 Difference]: With dead ends: 2566 [2021-05-21 21:55:29,404 INFO L226 Difference]: Without dead ends: 2296 [2021-05-21 21:55:29,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 182.0ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:55:29,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-05-21 21:55:29,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1931. [2021-05-21 21:55:29,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:29,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-05-21 21:55:29,425 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-05-21 21:55:29,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:29,425 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-05-21 21:55:29,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:29,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-05-21 21:55:29,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 21:55:29,427 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:29,427 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:29,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:29,641 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:29,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:29,641 INFO L82 PathProgramCache]: Analyzing trace with hash -2073427979, now seen corresponding path program 13 times [2021-05-21 21:55:29,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:29,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025776717] [2021-05-21 21:55:29,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:29,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:29,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025776717] [2021-05-21 21:55:29,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025776717] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:29,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520040285] [2021-05-21 21:55:29,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:29,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:29,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:55:29,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:29,823 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:29,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520040285] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:29,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:29,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-21 21:55:29,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976349781] [2021-05-21 21:55:29,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:55:29,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:29,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:55:29,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:55:29,824 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:30,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:30,006 INFO L93 Difference]: Finished difference Result 2496 states and 6477 transitions. [2021-05-21 21:55:30,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 21:55:30,006 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 21:55:30,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:30,009 INFO L225 Difference]: With dead ends: 2496 [2021-05-21 21:55:30,009 INFO L226 Difference]: Without dead ends: 2226 [2021-05-21 21:55:30,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 155.3ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:55:30,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-05-21 21:55:30,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1931. [2021-05-21 21:55:30,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:30,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-05-21 21:55:30,030 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-05-21 21:55:30,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:30,030 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-05-21 21:55:30,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:30,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-05-21 21:55:30,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 21:55:30,033 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:30,033 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:30,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-21 21:55:30,245 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:30,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:30,245 INFO L82 PathProgramCache]: Analyzing trace with hash 506297029, now seen corresponding path program 14 times [2021-05-21 21:55:30,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:30,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856241695] [2021-05-21 21:55:30,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:30,304 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:30,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:30,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856241695] [2021-05-21 21:55:30,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856241695] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:30,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888545032] [2021-05-21 21:55:30,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:30,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:55:30,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:30,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:55:30,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:30,468 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:30,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888545032] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:30,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:30,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-05-21 21:55:30,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886910476] [2021-05-21 21:55:30,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:55:30,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:30,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:55:30,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:55:30,469 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:30,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:30,754 INFO L93 Difference]: Finished difference Result 3074 states and 8103 transitions. [2021-05-21 21:55:30,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 21:55:30,754 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 21:55:30,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:30,757 INFO L225 Difference]: With dead ends: 3074 [2021-05-21 21:55:30,757 INFO L226 Difference]: Without dead ends: 2451 [2021-05-21 21:55:30,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 237.7ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:55:30,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-05-21 21:55:30,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1961. [2021-05-21 21:55:30,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1960 states have (on average 2.726530612244898) internal successors, (5344), 1960 states have internal predecessors, (5344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:30,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 5344 transitions. [2021-05-21 21:55:30,778 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 5344 transitions. Word has length 65 [2021-05-21 21:55:30,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:30,778 INFO L482 AbstractCegarLoop]: Abstraction has 1961 states and 5344 transitions. [2021-05-21 21:55:30,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:30,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 5344 transitions. [2021-05-21 21:55:30,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 21:55:30,780 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:30,780 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:30,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-21 21:55:30,996 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:30,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:30,996 INFO L82 PathProgramCache]: Analyzing trace with hash -526350573, now seen corresponding path program 15 times [2021-05-21 21:55:30,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:30,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202314458] [2021-05-21 21:55:30,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:31,050 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:31,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:31,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202314458] [2021-05-21 21:55:31,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202314458] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:31,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801923744] [2021-05-21 21:55:31,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:31,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 21:55:31,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:31,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:55:31,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:31,170 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:31,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801923744] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:31,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:31,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-21 21:55:31,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170558551] [2021-05-21 21:55:31,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:55:31,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:31,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:55:31,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:55:31,171 INFO L87 Difference]: Start difference. First operand 1961 states and 5344 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:31,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:31,364 INFO L93 Difference]: Finished difference Result 3278 states and 8771 transitions. [2021-05-21 21:55:31,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 21:55:31,364 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 21:55:31,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:31,368 INFO L225 Difference]: With dead ends: 3278 [2021-05-21 21:55:31,368 INFO L226 Difference]: Without dead ends: 3008 [2021-05-21 21:55:31,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 154.6ms TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2021-05-21 21:55:31,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-05-21 21:55:31,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 2141. [2021-05-21 21:55:31,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2141 states, 2140 states have (on average 2.758411214953271) internal successors, (5903), 2140 states have internal predecessors, (5903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:31,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 5903 transitions. [2021-05-21 21:55:31,396 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 5903 transitions. Word has length 65 [2021-05-21 21:55:31,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:31,396 INFO L482 AbstractCegarLoop]: Abstraction has 2141 states and 5903 transitions. [2021-05-21 21:55:31,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:31,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 5903 transitions. [2021-05-21 21:55:31,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 21:55:31,398 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:31,398 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:31,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-21 21:55:31,613 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:31,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:31,614 INFO L82 PathProgramCache]: Analyzing trace with hash -504007323, now seen corresponding path program 16 times [2021-05-21 21:55:31,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:31,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856138638] [2021-05-21 21:55:31,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:31,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:31,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856138638] [2021-05-21 21:55:31,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856138638] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:31,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404527555] [2021-05-21 21:55:31,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:31,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:55:31,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:31,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:55:31,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:31,819 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:31,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404527555] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:31,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:31,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-05-21 21:55:31,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383275470] [2021-05-21 21:55:31,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:55:31,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:31,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:55:31,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:55:31,820 INFO L87 Difference]: Start difference. First operand 2141 states and 5903 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:32,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:32,134 INFO L93 Difference]: Finished difference Result 3221 states and 8631 transitions. [2021-05-21 21:55:32,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 21:55:32,134 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 21:55:32,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:32,137 INFO L225 Difference]: With dead ends: 3221 [2021-05-21 21:55:32,137 INFO L226 Difference]: Without dead ends: 2646 [2021-05-21 21:55:32,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 269.5ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:55:32,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-05-21 21:55:32,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2056. [2021-05-21 21:55:32,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2056 states, 2055 states have (on average 2.7343065693430657) internal successors, (5619), 2055 states have internal predecessors, (5619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:32,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 5619 transitions. [2021-05-21 21:55:32,160 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 5619 transitions. Word has length 65 [2021-05-21 21:55:32,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:32,160 INFO L482 AbstractCegarLoop]: Abstraction has 2056 states and 5619 transitions. [2021-05-21 21:55:32,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:32,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 5619 transitions. [2021-05-21 21:55:32,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 21:55:32,162 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:32,162 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:32,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-21 21:55:32,377 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:32,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:32,377 INFO L82 PathProgramCache]: Analyzing trace with hash 211164831, now seen corresponding path program 17 times [2021-05-21 21:55:32,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:32,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051347124] [2021-05-21 21:55:32,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:32,442 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:55:32,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:32,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051347124] [2021-05-21 21:55:32,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051347124] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:32,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154218188] [2021-05-21 21:55:32,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:32,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:55:32,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:32,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:55:32,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:55:32,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154218188] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:32,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:32,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-05-21 21:55:32,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860550718] [2021-05-21 21:55:32,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:55:32,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:32,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:55:32,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:55:32,589 INFO L87 Difference]: Start difference. First operand 2056 states and 5619 transitions. Second operand has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:32,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:32,745 INFO L93 Difference]: Finished difference Result 3061 states and 7949 transitions. [2021-05-21 21:55:32,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:55:32,746 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 21:55:32,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:32,748 INFO L225 Difference]: With dead ends: 3061 [2021-05-21 21:55:32,748 INFO L226 Difference]: Without dead ends: 2712 [2021-05-21 21:55:32,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 146.8ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:55:32,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-05-21 21:55:32,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2058. [2021-05-21 21:55:32,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2058 states, 2057 states have (on average 2.733592610597958) internal successors, (5623), 2057 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:32,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 5623 transitions. [2021-05-21 21:55:32,773 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 5623 transitions. Word has length 65 [2021-05-21 21:55:32,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:32,773 INFO L482 AbstractCegarLoop]: Abstraction has 2058 states and 5623 transitions. [2021-05-21 21:55:32,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:32,773 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 5623 transitions. [2021-05-21 21:55:32,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 21:55:32,779 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:32,779 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:32,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:32,993 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:32,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:32,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1649663653, now seen corresponding path program 18 times [2021-05-21 21:55:32,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:32,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882249763] [2021-05-21 21:55:32,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:33,056 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:55:33,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:33,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882249763] [2021-05-21 21:55:33,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882249763] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:33,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363231360] [2021-05-21 21:55:33,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:33,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:55:33,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:33,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:55:33,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:55:33,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363231360] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:33,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:33,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-21 21:55:33,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361364625] [2021-05-21 21:55:33,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:55:33,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:33,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:55:33,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:55:33,178 INFO L87 Difference]: Start difference. First operand 2058 states and 5623 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:33,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:33,305 INFO L93 Difference]: Finished difference Result 2861 states and 7357 transitions. [2021-05-21 21:55:33,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:55:33,305 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 21:55:33,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:33,307 INFO L225 Difference]: With dead ends: 2861 [2021-05-21 21:55:33,307 INFO L226 Difference]: Without dead ends: 2576 [2021-05-21 21:55:33,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:55:33,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-05-21 21:55:33,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 2038. [2021-05-21 21:55:33,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2038 states, 2037 states have (on average 2.74079528718704) internal successors, (5583), 2037 states have internal predecessors, (5583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:33,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2038 states to 2038 states and 5583 transitions. [2021-05-21 21:55:33,329 INFO L78 Accepts]: Start accepts. Automaton has 2038 states and 5583 transitions. Word has length 65 [2021-05-21 21:55:33,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:33,329 INFO L482 AbstractCegarLoop]: Abstraction has 2038 states and 5583 transitions. [2021-05-21 21:55:33,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:33,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states and 5583 transitions. [2021-05-21 21:55:33,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 21:55:33,331 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:33,331 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:33,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:33,545 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:33,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:33,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1345737589, now seen corresponding path program 19 times [2021-05-21 21:55:33,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:33,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600031809] [2021-05-21 21:55:33,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:33,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:33,610 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:55:33,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:33,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600031809] [2021-05-21 21:55:33,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600031809] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:33,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880085565] [2021-05-21 21:55:33,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:33,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:55:33,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:33,744 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:55:33,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880085565] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:33,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:33,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-05-21 21:55:33,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579424260] [2021-05-21 21:55:33,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:55:33,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:33,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:55:33,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:55:33,746 INFO L87 Difference]: Start difference. First operand 2038 states and 5583 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:33,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:33,916 INFO L93 Difference]: Finished difference Result 2796 states and 7227 transitions. [2021-05-21 21:55:33,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:55:33,916 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 21:55:33,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:33,919 INFO L225 Difference]: With dead ends: 2796 [2021-05-21 21:55:33,919 INFO L226 Difference]: Without dead ends: 2511 [2021-05-21 21:55:33,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 160.9ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:55:33,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2021-05-21 21:55:33,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2013. [2021-05-21 21:55:33,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2013 states, 2012 states have (on average 2.75) internal successors, (5533), 2012 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:33,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 5533 transitions. [2021-05-21 21:55:33,940 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 5533 transitions. Word has length 65 [2021-05-21 21:55:33,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:33,940 INFO L482 AbstractCegarLoop]: Abstraction has 2013 states and 5533 transitions. [2021-05-21 21:55:33,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:33,940 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 5533 transitions. [2021-05-21 21:55:33,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 21:55:33,942 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:33,942 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:34,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-21 21:55:34,157 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:34,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:34,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1991900067, now seen corresponding path program 20 times [2021-05-21 21:55:34,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:34,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093535297] [2021-05-21 21:55:34,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:34,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:34,209 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:55:34,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:34,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093535297] [2021-05-21 21:55:34,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093535297] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:34,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534434953] [2021-05-21 21:55:34,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:34,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:55:34,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:34,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:55:34,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:34,320 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:55:34,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534434953] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:34,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:34,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-21 21:55:34,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718807192] [2021-05-21 21:55:34,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:55:34,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:34,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:55:34,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:55:34,321 INFO L87 Difference]: Start difference. First operand 2013 states and 5533 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:34,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:34,439 INFO L93 Difference]: Finished difference Result 2721 states and 7077 transitions. [2021-05-21 21:55:34,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 21:55:34,439 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 21:55:34,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:34,441 INFO L225 Difference]: With dead ends: 2721 [2021-05-21 21:55:34,441 INFO L226 Difference]: Without dead ends: 2436 [2021-05-21 21:55:34,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:55:34,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-05-21 21:55:34,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1988. [2021-05-21 21:55:34,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 2.7594363361852037) internal successors, (5483), 1987 states have internal predecessors, (5483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:34,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 5483 transitions. [2021-05-21 21:55:34,461 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 5483 transitions. Word has length 65 [2021-05-21 21:55:34,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:34,461 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 5483 transitions. [2021-05-21 21:55:34,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:34,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 5483 transitions. [2021-05-21 21:55:34,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 21:55:34,463 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:34,463 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:34,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:34,678 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:34,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:34,678 INFO L82 PathProgramCache]: Analyzing trace with hash 596560781, now seen corresponding path program 21 times [2021-05-21 21:55:34,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:34,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782971396] [2021-05-21 21:55:34,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:34,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:55:34,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:34,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782971396] [2021-05-21 21:55:34,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782971396] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:34,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498609018] [2021-05-21 21:55:34,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:34,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 21:55:34,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:34,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:55:34,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:34,889 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:55:34,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498609018] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:34,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:34,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-05-21 21:55:34,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933581335] [2021-05-21 21:55:34,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:55:34,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:34,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:55:34,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:55:34,890 INFO L87 Difference]: Start difference. First operand 1988 states and 5483 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:35,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:35,087 INFO L93 Difference]: Finished difference Result 2646 states and 6927 transitions. [2021-05-21 21:55:35,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 21:55:35,088 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 21:55:35,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:35,090 INFO L225 Difference]: With dead ends: 2646 [2021-05-21 21:55:35,090 INFO L226 Difference]: Without dead ends: 2361 [2021-05-21 21:55:35,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 164.7ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:55:35,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-05-21 21:55:35,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 1963. [2021-05-21 21:55:35,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 2.7691131498470947) internal successors, (5433), 1962 states have internal predecessors, (5433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:35,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 5433 transitions. [2021-05-21 21:55:35,109 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 5433 transitions. Word has length 65 [2021-05-21 21:55:35,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:35,109 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 5433 transitions. [2021-05-21 21:55:35,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:35,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 5433 transitions. [2021-05-21 21:55:35,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 21:55:35,111 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:35,111 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:35,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-21 21:55:35,326 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:35,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:35,327 INFO L82 PathProgramCache]: Analyzing trace with hash 797376750, now seen corresponding path program 22 times [2021-05-21 21:55:35,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:35,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191838197] [2021-05-21 21:55:35,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:35,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:35,383 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:35,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:35,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191838197] [2021-05-21 21:55:35,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191838197] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:35,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980745199] [2021-05-21 21:55:35,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:35,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:55:35,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:35,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:55:35,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:35,501 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:35,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980745199] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:35,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:35,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-21 21:55:35,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483228560] [2021-05-21 21:55:35,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:55:35,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:35,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:55:35,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:55:35,502 INFO L87 Difference]: Start difference. First operand 1963 states and 5433 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:35,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:35,706 INFO L93 Difference]: Finished difference Result 3055 states and 8279 transitions. [2021-05-21 21:55:35,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:55:35,707 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 21:55:35,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:35,709 INFO L225 Difference]: With dead ends: 3055 [2021-05-21 21:55:35,709 INFO L226 Difference]: Without dead ends: 2446 [2021-05-21 21:55:35,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 177.4ms TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:55:35,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2021-05-21 21:55:35,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2028. [2021-05-21 21:55:35,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.8036507153428714) internal successors, (5683), 2027 states have internal predecessors, (5683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:35,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5683 transitions. [2021-05-21 21:55:35,729 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5683 transitions. Word has length 65 [2021-05-21 21:55:35,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:35,729 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5683 transitions. [2021-05-21 21:55:35,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:35,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5683 transitions. [2021-05-21 21:55:35,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-21 21:55:35,731 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:35,731 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:35,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-21 21:55:35,938 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:35,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:35,939 INFO L82 PathProgramCache]: Analyzing trace with hash 2053970119, now seen corresponding path program 23 times [2021-05-21 21:55:35,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:35,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586636797] [2021-05-21 21:55:35,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:36,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:36,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586636797] [2021-05-21 21:55:36,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586636797] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:36,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187976536] [2021-05-21 21:55:36,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:36,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 21:55:36,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:36,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:55:36,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:36,161 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:36,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187976536] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:36,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:36,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-05-21 21:55:36,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188328604] [2021-05-21 21:55:36,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 21:55:36,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:36,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 21:55:36,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:55:36,162 INFO L87 Difference]: Start difference. First operand 2028 states and 5683 transitions. Second operand has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:36,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:36,377 INFO L93 Difference]: Finished difference Result 2868 states and 7683 transitions. [2021-05-21 21:55:36,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 21:55:36,377 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-05-21 21:55:36,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:36,379 INFO L225 Difference]: With dead ends: 2868 [2021-05-21 21:55:36,379 INFO L226 Difference]: Without dead ends: 2534 [2021-05-21 21:55:36,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:55:36,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-05-21 21:55:36,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 2113. [2021-05-21 21:55:36,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 2.7713068181818183) internal successors, (5853), 2112 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:36,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 5853 transitions. [2021-05-21 21:55:36,400 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 5853 transitions. Word has length 70 [2021-05-21 21:55:36,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:36,400 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 5853 transitions. [2021-05-21 21:55:36,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:36,400 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 5853 transitions. [2021-05-21 21:55:36,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-21 21:55:36,402 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:36,402 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:36,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-21 21:55:36,617 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:36,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:36,617 INFO L82 PathProgramCache]: Analyzing trace with hash -778605685, now seen corresponding path program 24 times [2021-05-21 21:55:36,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:36,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614585244] [2021-05-21 21:55:36,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:36,692 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:36,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:36,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614585244] [2021-05-21 21:55:36,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614585244] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:36,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739996916] [2021-05-21 21:55:36,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:36,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 21:55:36,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:36,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 21:55:36,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:36,826 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:36,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739996916] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:36,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:36,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-21 21:55:36,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398482266] [2021-05-21 21:55:36,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:55:36,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:36,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:55:36,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:55:36,827 INFO L87 Difference]: Start difference. First operand 2113 states and 5853 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:36,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:36,956 INFO L93 Difference]: Finished difference Result 3061 states and 7877 transitions. [2021-05-21 21:55:36,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:55:36,956 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-05-21 21:55:36,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:36,959 INFO L225 Difference]: With dead ends: 3061 [2021-05-21 21:55:36,959 INFO L226 Difference]: Without dead ends: 2791 [2021-05-21 21:55:36,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:55:36,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-05-21 21:55:36,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2128. [2021-05-21 21:55:36,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:36,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-05-21 21:55:36,979 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-05-21 21:55:36,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:36,979 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-05-21 21:55:36,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:36,979 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-05-21 21:55:36,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-21 21:55:36,981 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:36,981 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:37,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-21 21:55:37,181 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:37,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:37,182 INFO L82 PathProgramCache]: Analyzing trace with hash 220290651, now seen corresponding path program 25 times [2021-05-21 21:55:37,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:37,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290696286] [2021-05-21 21:55:37,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:37,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:37,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:37,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290696286] [2021-05-21 21:55:37,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290696286] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:37,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989378738] [2021-05-21 21:55:37,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:37,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:37,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 21:55:37,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:37,402 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:37,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989378738] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:37,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:37,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-05-21 21:55:37,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456499037] [2021-05-21 21:55:37,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:55:37,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:37,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:55:37,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:55:37,403 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:37,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:37,581 INFO L93 Difference]: Finished difference Result 2946 states and 7647 transitions. [2021-05-21 21:55:37,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 21:55:37,581 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-05-21 21:55:37,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:37,584 INFO L225 Difference]: With dead ends: 2946 [2021-05-21 21:55:37,584 INFO L226 Difference]: Without dead ends: 2676 [2021-05-21 21:55:37,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 176.4ms TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:55:37,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-05-21 21:55:37,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 2128. [2021-05-21 21:55:37,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:37,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-05-21 21:55:37,604 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-05-21 21:55:37,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:37,604 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-05-21 21:55:37,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:37,604 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-05-21 21:55:37,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-21 21:55:37,606 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:37,606 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:37,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-21 21:55:37,807 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:37,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:37,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1659037239, now seen corresponding path program 26 times [2021-05-21 21:55:37,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:37,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969864191] [2021-05-21 21:55:37,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:37,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:37,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:37,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969864191] [2021-05-21 21:55:37,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969864191] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:37,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410018286] [2021-05-21 21:55:37,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:37,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:55:37,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:37,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 21:55:37,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:38,027 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:38,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410018286] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:38,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:38,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-21 21:55:38,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856810360] [2021-05-21 21:55:38,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:55:38,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:38,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:55:38,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:55:38,029 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:38,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:38,185 INFO L93 Difference]: Finished difference Result 2921 states and 7597 transitions. [2021-05-21 21:55:38,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:55:38,185 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-05-21 21:55:38,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:38,187 INFO L225 Difference]: With dead ends: 2921 [2021-05-21 21:55:38,187 INFO L226 Difference]: Without dead ends: 2651 [2021-05-21 21:55:38,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 172.9ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:55:38,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2021-05-21 21:55:38,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2128. [2021-05-21 21:55:38,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:38,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-05-21 21:55:38,208 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-05-21 21:55:38,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:38,208 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-05-21 21:55:38,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:38,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-05-21 21:55:38,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-21 21:55:38,210 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:38,210 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:38,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:38,410 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:38,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:38,411 INFO L82 PathProgramCache]: Analyzing trace with hash 371282073, now seen corresponding path program 27 times [2021-05-21 21:55:38,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:38,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50014877] [2021-05-21 21:55:38,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:38,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:38,482 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:38,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:38,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50014877] [2021-05-21 21:55:38,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50014877] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:38,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749491886] [2021-05-21 21:55:38,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:38,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 21:55:38,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:38,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 21:55:38,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:38,618 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:38,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749491886] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:38,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:38,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-05-21 21:55:38,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597923432] [2021-05-21 21:55:38,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:55:38,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:38,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:55:38,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:55:38,619 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:38,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:38,841 INFO L93 Difference]: Finished difference Result 2871 states and 7497 transitions. [2021-05-21 21:55:38,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 21:55:38,841 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-05-21 21:55:38,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:38,843 INFO L225 Difference]: With dead ends: 2871 [2021-05-21 21:55:38,843 INFO L226 Difference]: Without dead ends: 2601 [2021-05-21 21:55:38,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 206.1ms TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:55:38,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-05-21 21:55:38,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2128. [2021-05-21 21:55:38,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:38,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-05-21 21:55:38,863 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-05-21 21:55:38,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:38,864 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-05-21 21:55:38,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:38,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-05-21 21:55:38,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-21 21:55:38,865 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:38,865 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:39,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:39,078 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:39,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:39,079 INFO L82 PathProgramCache]: Analyzing trace with hash 985521543, now seen corresponding path program 28 times [2021-05-21 21:55:39,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:39,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496451548] [2021-05-21 21:55:39,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:39,141 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:39,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:39,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496451548] [2021-05-21 21:55:39,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496451548] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:39,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905153271] [2021-05-21 21:55:39,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:39,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:55:39,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:39,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 21:55:39,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:39,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905153271] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:39,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:39,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-21 21:55:39,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015505814] [2021-05-21 21:55:39,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:55:39,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:39,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:55:39,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:55:39,284 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:39,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:39,470 INFO L93 Difference]: Finished difference Result 2821 states and 7397 transitions. [2021-05-21 21:55:39,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 21:55:39,470 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-05-21 21:55:39,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:39,473 INFO L225 Difference]: With dead ends: 2821 [2021-05-21 21:55:39,473 INFO L226 Difference]: Without dead ends: 2551 [2021-05-21 21:55:39,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 164.0ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:55:39,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2021-05-21 21:55:39,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 2128. [2021-05-21 21:55:39,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:39,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-05-21 21:55:39,494 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-05-21 21:55:39,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:39,494 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-05-21 21:55:39,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:39,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-05-21 21:55:39,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-21 21:55:39,496 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:39,496 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:39,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-05-21 21:55:39,696 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:39,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:39,697 INFO L82 PathProgramCache]: Analyzing trace with hash -729720745, now seen corresponding path program 29 times [2021-05-21 21:55:39,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:39,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533237072] [2021-05-21 21:55:39,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:39,769 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:39,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:39,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533237072] [2021-05-21 21:55:39,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533237072] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:39,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869657880] [2021-05-21 21:55:39,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:39,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 21:55:39,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:39,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 21:55:39,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:39,905 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:39,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869657880] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:39,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:39,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-05-21 21:55:39,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930939997] [2021-05-21 21:55:39,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:55:39,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:39,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:55:39,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:55:39,906 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:40,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:40,184 INFO L93 Difference]: Finished difference Result 2831 states and 7447 transitions. [2021-05-21 21:55:40,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 21:55:40,184 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-05-21 21:55:40,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:40,187 INFO L225 Difference]: With dead ends: 2831 [2021-05-21 21:55:40,187 INFO L226 Difference]: Without dead ends: 2561 [2021-05-21 21:55:40,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 247.7ms TimeCoverageRelationStatistics Valid=267, Invalid=789, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:55:40,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2021-05-21 21:55:40,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 2128. [2021-05-21 21:55:40,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.768218147625764) internal successors, (5888), 2127 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:40,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5888 transitions. [2021-05-21 21:55:40,206 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5888 transitions. Word has length 70 [2021-05-21 21:55:40,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:40,206 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5888 transitions. [2021-05-21 21:55:40,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:40,206 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5888 transitions. [2021-05-21 21:55:40,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-21 21:55:40,208 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:40,208 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:40,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:40,409 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:40,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:40,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1762368347, now seen corresponding path program 30 times [2021-05-21 21:55:40,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:40,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863891546] [2021-05-21 21:55:40,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:40,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:40,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:40,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863891546] [2021-05-21 21:55:40,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863891546] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:40,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711691743] [2021-05-21 21:55:40,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:40,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 21:55:40,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:40,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 21:55:40,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:40,580 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:40,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711691743] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:40,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:40,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-21 21:55:40,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098860057] [2021-05-21 21:55:40,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:55:40,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:40,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:55:40,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:55:40,581 INFO L87 Difference]: Start difference. First operand 2128 states and 5888 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:40,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:40,779 INFO L93 Difference]: Finished difference Result 3598 states and 9621 transitions. [2021-05-21 21:55:40,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 21:55:40,780 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-05-21 21:55:40,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:40,783 INFO L225 Difference]: With dead ends: 3598 [2021-05-21 21:55:40,783 INFO L226 Difference]: Without dead ends: 3328 [2021-05-21 21:55:40,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 167.6ms TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:55:40,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2021-05-21 21:55:40,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 2308. [2021-05-21 21:55:40,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2308 states, 2307 states have (on average 2.7945383615084527) internal successors, (6447), 2307 states have internal predecessors, (6447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:40,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 6447 transitions. [2021-05-21 21:55:40,808 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 6447 transitions. Word has length 70 [2021-05-21 21:55:40,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:40,808 INFO L482 AbstractCegarLoop]: Abstraction has 2308 states and 6447 transitions. [2021-05-21 21:55:40,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:40,808 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 6447 transitions. [2021-05-21 21:55:40,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-21 21:55:40,810 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:40,810 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:41,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-21 21:55:41,021 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:41,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:41,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1740025097, now seen corresponding path program 31 times [2021-05-21 21:55:41,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:41,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75623422] [2021-05-21 21:55:41,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:41,088 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:41,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:41,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75623422] [2021-05-21 21:55:41,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75623422] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:41,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50677865] [2021-05-21 21:55:41,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:41,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 21:55:41,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:41,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50677865] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:41,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:41,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-05-21 21:55:41,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955004498] [2021-05-21 21:55:41,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:55:41,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:41,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:55:41,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:55:41,215 INFO L87 Difference]: Start difference. First operand 2308 states and 6447 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:41,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:41,539 INFO L93 Difference]: Finished difference Result 3421 states and 9121 transitions. [2021-05-21 21:55:41,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 21:55:41,539 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-05-21 21:55:41,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:41,542 INFO L225 Difference]: With dead ends: 3421 [2021-05-21 21:55:41,542 INFO L226 Difference]: Without dead ends: 2846 [2021-05-21 21:55:41,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 282.7ms TimeCoverageRelationStatistics Valid=357, Invalid=1049, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 21:55:41,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-05-21 21:55:41,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 1803. [2021-05-21 21:55:41,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1802 states have (on average 2.7291897891231964) internal successors, (4918), 1802 states have internal predecessors, (4918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:41,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 4918 transitions. [2021-05-21 21:55:41,562 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 4918 transitions. Word has length 70 [2021-05-21 21:55:41,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:41,562 INFO L482 AbstractCegarLoop]: Abstraction has 1803 states and 4918 transitions. [2021-05-21 21:55:41,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:41,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 4918 transitions. [2021-05-21 21:55:41,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 21:55:41,563 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:41,563 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:41,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:41,764 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:41,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:41,764 INFO L82 PathProgramCache]: Analyzing trace with hash 751678088, now seen corresponding path program 32 times [2021-05-21 21:55:41,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:41,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482940995] [2021-05-21 21:55:41,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:41,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:41,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:41,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482940995] [2021-05-21 21:55:41,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482940995] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:41,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265844222] [2021-05-21 21:55:41,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:41,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:55:41,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:41,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:55:41,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:41,970 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:41,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265844222] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:41,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:41,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-21 21:55:41,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199721290] [2021-05-21 21:55:41,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:55:41,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:41,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:55:41,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:55:41,971 INFO L87 Difference]: Start difference. First operand 1803 states and 4918 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:42,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:42,132 INFO L93 Difference]: Finished difference Result 2621 states and 6757 transitions. [2021-05-21 21:55:42,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 21:55:42,132 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 21:55:42,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:42,134 INFO L225 Difference]: With dead ends: 2621 [2021-05-21 21:55:42,134 INFO L226 Difference]: Without dead ends: 2351 [2021-05-21 21:55:42,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 154.1ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:55:42,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-05-21 21:55:42,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1878. [2021-05-21 21:55:42,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 2.7400106553010124) internal successors, (5143), 1877 states have internal predecessors, (5143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:42,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 5143 transitions. [2021-05-21 21:55:42,152 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 5143 transitions. Word has length 75 [2021-05-21 21:55:42,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:42,152 INFO L482 AbstractCegarLoop]: Abstraction has 1878 states and 5143 transitions. [2021-05-21 21:55:42,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:42,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 5143 transitions. [2021-05-21 21:55:42,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 21:55:42,154 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:42,154 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:42,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-21 21:55:42,355 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:42,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:42,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1750574424, now seen corresponding path program 33 times [2021-05-21 21:55:42,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:42,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142976099] [2021-05-21 21:55:42,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:42,437 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:42,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:42,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142976099] [2021-05-21 21:55:42,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142976099] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:42,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163496102] [2021-05-21 21:55:42,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:42,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 21:55:42,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:42,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:55:42,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:42,585 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:42,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163496102] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:42,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:42,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-05-21 21:55:42,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484679870] [2021-05-21 21:55:42,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:55:42,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:42,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:55:42,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:55:42,587 INFO L87 Difference]: Start difference. First operand 1878 states and 5143 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:42,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:42,828 INFO L93 Difference]: Finished difference Result 2841 states and 7272 transitions. [2021-05-21 21:55:42,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 21:55:42,828 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 21:55:42,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:42,831 INFO L225 Difference]: With dead ends: 2841 [2021-05-21 21:55:42,831 INFO L226 Difference]: Without dead ends: 2571 [2021-05-21 21:55:42,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 223.1ms TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:55:42,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-05-21 21:55:42,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 1953. [2021-05-21 21:55:42,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 2.75) internal successors, (5368), 1952 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:42,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 5368 transitions. [2021-05-21 21:55:42,850 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 5368 transitions. Word has length 75 [2021-05-21 21:55:42,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:42,850 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 5368 transitions. [2021-05-21 21:55:42,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:42,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 5368 transitions. [2021-05-21 21:55:42,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 21:55:42,852 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:42,852 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:43,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-21 21:55:43,054 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:43,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:43,055 INFO L82 PathProgramCache]: Analyzing trace with hash -128753466, now seen corresponding path program 34 times [2021-05-21 21:55:43,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:43,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642303684] [2021-05-21 21:55:43,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:43,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:43,125 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:43,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:43,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642303684] [2021-05-21 21:55:43,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642303684] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:43,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269958497] [2021-05-21 21:55:43,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:43,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:55:43,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:43,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:55:43,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:43,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269958497] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:43,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:43,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-21 21:55:43,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537182704] [2021-05-21 21:55:43,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:55:43,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:43,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:55:43,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:55:43,271 INFO L87 Difference]: Start difference. First operand 1953 states and 5368 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:43,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:43,475 INFO L93 Difference]: Finished difference Result 2871 states and 7407 transitions. [2021-05-21 21:55:43,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 21:55:43,475 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 21:55:43,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:43,477 INFO L225 Difference]: With dead ends: 2871 [2021-05-21 21:55:43,477 INFO L226 Difference]: Without dead ends: 2601 [2021-05-21 21:55:43,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 190.9ms TimeCoverageRelationStatistics Valid=248, Invalid=744, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:55:43,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-05-21 21:55:43,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2028. [2021-05-21 21:55:43,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.759250123334978) internal successors, (5593), 2027 states have internal predecessors, (5593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:43,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5593 transitions. [2021-05-21 21:55:43,497 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5593 transitions. Word has length 75 [2021-05-21 21:55:43,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:43,498 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5593 transitions. [2021-05-21 21:55:43,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:43,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5593 transitions. [2021-05-21 21:55:43,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 21:55:43,499 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:43,499 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:43,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-21 21:55:43,713 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:43,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:43,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1901565846, now seen corresponding path program 35 times [2021-05-21 21:55:43,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:43,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475518853] [2021-05-21 21:55:43,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:43,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:43,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475518853] [2021-05-21 21:55:43,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475518853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:43,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135935364] [2021-05-21 21:55:43,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:43,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 21:55:43,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:43,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:55:43,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:43,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135935364] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:43,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:43,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-05-21 21:55:43,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864997304] [2021-05-21 21:55:43,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:55:43,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:43,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:55:43,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:55:43,922 INFO L87 Difference]: Start difference. First operand 2028 states and 5593 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:44,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:44,158 INFO L93 Difference]: Finished difference Result 2896 states and 7532 transitions. [2021-05-21 21:55:44,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 21:55:44,158 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 21:55:44,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:44,161 INFO L225 Difference]: With dead ends: 2896 [2021-05-21 21:55:44,161 INFO L226 Difference]: Without dead ends: 2626 [2021-05-21 21:55:44,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 224.9ms TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 21:55:44,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-05-21 21:55:44,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 2103. [2021-05-21 21:55:44,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2103 states, 2102 states have (on average 2.7678401522359657) internal successors, (5818), 2102 states have internal predecessors, (5818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:44,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 5818 transitions. [2021-05-21 21:55:44,181 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 5818 transitions. Word has length 75 [2021-05-21 21:55:44,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:44,181 INFO L482 AbstractCegarLoop]: Abstraction has 2103 states and 5818 transitions. [2021-05-21 21:55:44,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:44,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 5818 transitions. [2021-05-21 21:55:44,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 21:55:44,183 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:44,183 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:44,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-21 21:55:44,384 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:44,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:44,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1779161980, now seen corresponding path program 36 times [2021-05-21 21:55:44,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:44,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430197491] [2021-05-21 21:55:44,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:44,464 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:44,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:44,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430197491] [2021-05-21 21:55:44,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430197491] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:44,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319683744] [2021-05-21 21:55:44,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:44,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 21:55:44,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:44,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:55:44,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:44,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319683744] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:44,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:44,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-21 21:55:44,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070180817] [2021-05-21 21:55:44,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:55:44,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:44,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:55:44,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:55:44,596 INFO L87 Difference]: Start difference. First operand 2103 states and 5818 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:44,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:44,822 INFO L93 Difference]: Finished difference Result 2966 states and 7777 transitions. [2021-05-21 21:55:44,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 21:55:44,822 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 21:55:44,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:44,825 INFO L225 Difference]: With dead ends: 2966 [2021-05-21 21:55:44,825 INFO L226 Difference]: Without dead ends: 2696 [2021-05-21 21:55:44,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 216.8ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 21:55:44,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-05-21 21:55:44,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2178. [2021-05-21 21:55:44,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2177 states have (on average 2.782728525493799) internal successors, (6058), 2177 states have internal predecessors, (6058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:44,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 6058 transitions. [2021-05-21 21:55:44,847 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 6058 transitions. Word has length 75 [2021-05-21 21:55:44,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:44,847 INFO L482 AbstractCegarLoop]: Abstraction has 2178 states and 6058 transitions. [2021-05-21 21:55:44,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:44,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 6058 transitions. [2021-05-21 21:55:44,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 21:55:44,850 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:44,850 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:45,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:45,051 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:45,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:45,051 INFO L82 PathProgramCache]: Analyzing trace with hash 800563028, now seen corresponding path program 37 times [2021-05-21 21:55:45,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:45,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595694713] [2021-05-21 21:55:45,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:45,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:45,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595694713] [2021-05-21 21:55:45,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595694713] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:45,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497534893] [2021-05-21 21:55:45,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:45,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:45,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:55:45,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:45,253 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:45,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497534893] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:45,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:45,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-05-21 21:55:45,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477392868] [2021-05-21 21:55:45,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:55:45,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:45,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:55:45,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:55:45,254 INFO L87 Difference]: Start difference. First operand 2178 states and 6058 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:45,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:45,581 INFO L93 Difference]: Finished difference Result 3544 states and 9403 transitions. [2021-05-21 21:55:45,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 21:55:45,582 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 21:55:45,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:45,585 INFO L225 Difference]: With dead ends: 3544 [2021-05-21 21:55:45,585 INFO L226 Difference]: Without dead ends: 2921 [2021-05-21 21:55:45,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 284.0ms TimeCoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 21:55:45,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-05-21 21:55:45,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2253. [2021-05-21 21:55:45,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7921847246891653) internal successors, (6288), 2252 states have internal predecessors, (6288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:45,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6288 transitions. [2021-05-21 21:55:45,611 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6288 transitions. Word has length 75 [2021-05-21 21:55:45,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:45,611 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6288 transitions. [2021-05-21 21:55:45,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:45,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6288 transitions. [2021-05-21 21:55:45,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 21:55:45,615 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:45,615 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:45,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:45,827 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:45,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:45,827 INFO L82 PathProgramCache]: Analyzing trace with hash -232084574, now seen corresponding path program 38 times [2021-05-21 21:55:45,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:45,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806638070] [2021-05-21 21:55:45,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:45,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:45,888 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:45,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:45,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806638070] [2021-05-21 21:55:45,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806638070] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:45,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143405220] [2021-05-21 21:55:45,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:45,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:55:45,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:45,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:55:45,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:46,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143405220] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:46,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:46,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-21 21:55:46,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516965158] [2021-05-21 21:55:46,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:55:46,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:46,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:55:46,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:55:46,007 INFO L87 Difference]: Start difference. First operand 2253 states and 6288 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:46,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:46,252 INFO L93 Difference]: Finished difference Result 3748 states and 10071 transitions. [2021-05-21 21:55:46,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 21:55:46,252 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 21:55:46,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:46,255 INFO L225 Difference]: With dead ends: 3748 [2021-05-21 21:55:46,255 INFO L226 Difference]: Without dead ends: 3478 [2021-05-21 21:55:46,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 205.6ms TimeCoverageRelationStatistics Valid=355, Invalid=905, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 21:55:46,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-05-21 21:55:46,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 2433. [2021-05-21 21:55:46,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 2432 states have (on average 2.815378289473684) internal successors, (6847), 2432 states have internal predecessors, (6847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:46,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 6847 transitions. [2021-05-21 21:55:46,281 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 6847 transitions. Word has length 75 [2021-05-21 21:55:46,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:46,282 INFO L482 AbstractCegarLoop]: Abstraction has 2433 states and 6847 transitions. [2021-05-21 21:55:46,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:46,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 6847 transitions. [2021-05-21 21:55:46,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 21:55:46,283 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:46,283 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:46,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:46,484 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:46,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:46,485 INFO L82 PathProgramCache]: Analyzing trace with hash -209741324, now seen corresponding path program 39 times [2021-05-21 21:55:46,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:46,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678348413] [2021-05-21 21:55:46,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:46,549 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:46,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:46,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678348413] [2021-05-21 21:55:46,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678348413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:46,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330418427] [2021-05-21 21:55:46,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:46,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 21:55:46,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:46,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:55:46,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:46,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330418427] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:46,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:46,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-21 21:55:46,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250057978] [2021-05-21 21:55:46,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:55:46,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:46,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:55:46,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:55:46,675 INFO L87 Difference]: Start difference. First operand 2433 states and 6847 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:47,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:47,011 INFO L93 Difference]: Finished difference Result 3210 states and 8721 transitions. [2021-05-21 21:55:47,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 21:55:47,011 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 21:55:47,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:47,014 INFO L225 Difference]: With dead ends: 3210 [2021-05-21 21:55:47,014 INFO L226 Difference]: Without dead ends: 2721 [2021-05-21 21:55:47,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 285.5ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:55:47,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2021-05-21 21:55:47,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2378. [2021-05-21 21:55:47,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.8115271350441735) internal successors, (6683), 2377 states have internal predecessors, (6683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:47,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6683 transitions. [2021-05-21 21:55:47,037 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6683 transitions. Word has length 75 [2021-05-21 21:55:47,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:47,038 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6683 transitions. [2021-05-21 21:55:47,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:47,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6683 transitions. [2021-05-21 21:55:47,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 21:55:47,039 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:47,040 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:47,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:47,255 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:47,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:47,255 INFO L82 PathProgramCache]: Analyzing trace with hash 452139800, now seen corresponding path program 40 times [2021-05-21 21:55:47,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:47,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614896858] [2021-05-21 21:55:47,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:47,346 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:47,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:47,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614896858] [2021-05-21 21:55:47,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614896858] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:47,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077265163] [2021-05-21 21:55:47,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:47,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:55:47,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:47,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 21:55:47,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:47,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077265163] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:47,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:47,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-05-21 21:55:47,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926055640] [2021-05-21 21:55:47,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:55:47,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:47,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:55:47,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:55:47,506 INFO L87 Difference]: Start difference. First operand 2378 states and 6683 transitions. Second operand has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:47,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:47,715 INFO L93 Difference]: Finished difference Result 2948 states and 7951 transitions. [2021-05-21 21:55:47,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 21:55:47,716 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 21:55:47,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:47,718 INFO L225 Difference]: With dead ends: 2948 [2021-05-21 21:55:47,718 INFO L226 Difference]: Without dead ends: 2678 [2021-05-21 21:55:47,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 204.8ms TimeCoverageRelationStatistics Valid=260, Invalid=732, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:55:47,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2021-05-21 21:55:47,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 2463. [2021-05-21 21:55:47,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 2.7835093419983754) internal successors, (6853), 2462 states have internal predecessors, (6853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:47,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 6853 transitions. [2021-05-21 21:55:47,739 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 6853 transitions. Word has length 80 [2021-05-21 21:55:47,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:47,739 INFO L482 AbstractCegarLoop]: Abstraction has 2463 states and 6853 transitions. [2021-05-21 21:55:47,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:47,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 6853 transitions. [2021-05-21 21:55:47,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 21:55:47,741 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:47,741 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:47,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-05-21 21:55:47,957 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:47,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:47,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1173866716, now seen corresponding path program 41 times [2021-05-21 21:55:47,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:47,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953689372] [2021-05-21 21:55:47,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:48,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:48,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953689372] [2021-05-21 21:55:48,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953689372] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:48,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742246602] [2021-05-21 21:55:48,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:48,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 21:55:48,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:48,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 21:55:48,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:48,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742246602] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:48,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:48,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-05-21 21:55:48,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144697757] [2021-05-21 21:55:48,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:55:48,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:48,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:55:48,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:55:48,184 INFO L87 Difference]: Start difference. First operand 2463 states and 6853 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:48,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:48,337 INFO L93 Difference]: Finished difference Result 3561 states and 9177 transitions. [2021-05-21 21:55:48,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:55:48,338 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 21:55:48,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:48,341 INFO L225 Difference]: With dead ends: 3561 [2021-05-21 21:55:48,341 INFO L226 Difference]: Without dead ends: 3291 [2021-05-21 21:55:48,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 164.0ms TimeCoverageRelationStatistics Valid=196, Invalid=560, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:55:48,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3291 states. [2021-05-21 21:55:48,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3291 to 2478. [2021-05-21 21:55:48,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:48,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-05-21 21:55:48,363 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-05-21 21:55:48,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:48,363 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-05-21 21:55:48,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:48,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-05-21 21:55:48,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 21:55:48,365 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:48,365 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:48,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:48,573 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:48,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:48,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1794345044, now seen corresponding path program 42 times [2021-05-21 21:55:48,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:48,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41699576] [2021-05-21 21:55:48,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:48,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:48,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:48,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41699576] [2021-05-21 21:55:48,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41699576] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:48,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137732391] [2021-05-21 21:55:48,663 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:48,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 21:55:48,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:48,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 21:55:48,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:48,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137732391] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:48,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:48,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-21 21:55:48,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006074461] [2021-05-21 21:55:48,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:55:48,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:48,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:55:48,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:55:48,799 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:49,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:49,011 INFO L93 Difference]: Finished difference Result 3446 states and 8947 transitions. [2021-05-21 21:55:49,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 21:55:49,011 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 21:55:49,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:49,014 INFO L225 Difference]: With dead ends: 3446 [2021-05-21 21:55:49,014 INFO L226 Difference]: Without dead ends: 3176 [2021-05-21 21:55:49,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 212.3ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:55:49,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-05-21 21:55:49,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2478. [2021-05-21 21:55:49,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:49,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-05-21 21:55:49,038 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-05-21 21:55:49,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:49,038 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-05-21 21:55:49,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:49,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-05-21 21:55:49,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 21:55:49,039 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:49,040 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:49,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-21 21:55:49,245 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:49,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:49,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1340128870, now seen corresponding path program 43 times [2021-05-21 21:55:49,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:49,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896677111] [2021-05-21 21:55:49,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:49,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:49,326 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:49,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:49,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896677111] [2021-05-21 21:55:49,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896677111] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:49,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610991883] [2021-05-21 21:55:49,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:49,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 21:55:49,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:49,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610991883] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:49,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:49,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-05-21 21:55:49,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332728990] [2021-05-21 21:55:49,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:55:49,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:49,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:55:49,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:55:49,461 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:49,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:49,654 INFO L93 Difference]: Finished difference Result 3421 states and 8897 transitions. [2021-05-21 21:55:49,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 21:55:49,654 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 21:55:49,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:49,657 INFO L225 Difference]: With dead ends: 3421 [2021-05-21 21:55:49,658 INFO L226 Difference]: Without dead ends: 3151 [2021-05-21 21:55:49,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 176.3ms TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-05-21 21:55:49,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-05-21 21:55:49,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2478. [2021-05-21 21:55:49,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:49,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-05-21 21:55:49,681 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-05-21 21:55:49,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:49,681 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-05-21 21:55:49,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:49,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-05-21 21:55:49,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 21:55:49,683 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:49,683 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:49,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:49,883 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:49,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:49,883 INFO L82 PathProgramCache]: Analyzing trace with hash -341232534, now seen corresponding path program 44 times [2021-05-21 21:55:49,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:49,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663645209] [2021-05-21 21:55:49,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:49,967 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:49,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:49,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663645209] [2021-05-21 21:55:49,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663645209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:49,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133640805] [2021-05-21 21:55:49,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:50,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:55:50,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:50,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 21:55:50,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:50,095 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:50,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133640805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:50,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:50,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-21 21:55:50,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974713654] [2021-05-21 21:55:50,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:55:50,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:50,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:55:50,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:55:50,096 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:50,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:50,335 INFO L93 Difference]: Finished difference Result 3371 states and 8797 transitions. [2021-05-21 21:55:50,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 21:55:50,335 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 21:55:50,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:50,338 INFO L225 Difference]: With dead ends: 3371 [2021-05-21 21:55:50,338 INFO L226 Difference]: Without dead ends: 3101 [2021-05-21 21:55:50,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 227.1ms TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 21:55:50,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3101 states. [2021-05-21 21:55:50,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3101 to 2478. [2021-05-21 21:55:50,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:50,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-05-21 21:55:50,360 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-05-21 21:55:50,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:50,360 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-05-21 21:55:50,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:50,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-05-21 21:55:50,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 21:55:50,362 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:50,362 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:50,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-21 21:55:50,562 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:50,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:50,563 INFO L82 PathProgramCache]: Analyzing trace with hash 2074406872, now seen corresponding path program 45 times [2021-05-21 21:55:50,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:50,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303931835] [2021-05-21 21:55:50,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:50,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:50,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303931835] [2021-05-21 21:55:50,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303931835] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:50,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526814076] [2021-05-21 21:55:50,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:50,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 21:55:50,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:50,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 21:55:50,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:50,767 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:50,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526814076] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:50,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:50,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-05-21 21:55:50,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084690737] [2021-05-21 21:55:50,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:55:50,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:50,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:55:50,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:55:50,769 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:50,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:50,986 INFO L93 Difference]: Finished difference Result 3321 states and 8697 transitions. [2021-05-21 21:55:50,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 21:55:50,986 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 21:55:50,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:51,001 INFO L225 Difference]: With dead ends: 3321 [2021-05-21 21:55:51,001 INFO L226 Difference]: Without dead ends: 3051 [2021-05-21 21:55:51,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 192.8ms TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:55:51,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-05-21 21:55:51,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 2478. [2021-05-21 21:55:51,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:51,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-05-21 21:55:51,023 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-05-21 21:55:51,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:51,023 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-05-21 21:55:51,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:51,023 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-05-21 21:55:51,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 21:55:51,025 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:51,025 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:51,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-21 21:55:51,229 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:51,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:51,229 INFO L82 PathProgramCache]: Analyzing trace with hash -190241112, now seen corresponding path program 46 times [2021-05-21 21:55:51,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:51,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415484637] [2021-05-21 21:55:51,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:51,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:51,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:51,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415484637] [2021-05-21 21:55:51,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415484637] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:51,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114855256] [2021-05-21 21:55:51,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:51,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:55:51,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:51,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 21:55:51,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:51,444 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:51,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114855256] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:51,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:51,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-21 21:55:51,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633432714] [2021-05-21 21:55:51,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:55:51,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:51,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:55:51,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:55:51,445 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:51,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:51,718 INFO L93 Difference]: Finished difference Result 3271 states and 8597 transitions. [2021-05-21 21:55:51,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 21:55:51,718 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 21:55:51,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:51,720 INFO L225 Difference]: With dead ends: 3271 [2021-05-21 21:55:51,720 INFO L226 Difference]: Without dead ends: 3001 [2021-05-21 21:55:51,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 251.7ms TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 21:55:51,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-05-21 21:55:51,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 2478. [2021-05-21 21:55:51,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:51,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-05-21 21:55:51,741 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-05-21 21:55:51,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:51,742 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-05-21 21:55:51,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:51,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-05-21 21:55:51,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 21:55:51,743 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:51,743 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:51,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-21 21:55:51,944 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:51,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:51,944 INFO L82 PathProgramCache]: Analyzing trace with hash 423998358, now seen corresponding path program 47 times [2021-05-21 21:55:51,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:51,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463929000] [2021-05-21 21:55:51,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:51,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:52,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:52,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463929000] [2021-05-21 21:55:52,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463929000] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:52,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451060779] [2021-05-21 21:55:52,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:52,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 21:55:52,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:52,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 21:55:52,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:52,138 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:52,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451060779] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:52,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:52,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-05-21 21:55:52,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341686163] [2021-05-21 21:55:52,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:55:52,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:52,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:55:52,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:55:52,139 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:52,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:52,383 INFO L93 Difference]: Finished difference Result 3221 states and 8497 transitions. [2021-05-21 21:55:52,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 21:55:52,384 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 21:55:52,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:52,386 INFO L225 Difference]: With dead ends: 3221 [2021-05-21 21:55:52,386 INFO L226 Difference]: Without dead ends: 2951 [2021-05-21 21:55:52,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 214.7ms TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 21:55:52,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-05-21 21:55:52,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2478. [2021-05-21 21:55:52,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:52,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-05-21 21:55:52,408 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-05-21 21:55:52,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:52,408 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-05-21 21:55:52,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:52,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-05-21 21:55:52,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 21:55:52,409 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:52,410 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:52,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:52,610 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:52,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:52,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1291243930, now seen corresponding path program 48 times [2021-05-21 21:55:52,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:52,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971345652] [2021-05-21 21:55:52,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:52,685 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:52,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:52,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971345652] [2021-05-21 21:55:52,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971345652] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:52,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16279789] [2021-05-21 21:55:52,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:52,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 21:55:52,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:52,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 21:55:52,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:52,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16279789] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:52,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:52,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-21 21:55:52,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965130401] [2021-05-21 21:55:52,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:55:52,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:52,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:55:52,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:55:52,849 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:53,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:53,214 INFO L93 Difference]: Finished difference Result 3679 states and 9763 transitions. [2021-05-21 21:55:53,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 21:55:53,215 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 21:55:53,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:53,217 INFO L225 Difference]: With dead ends: 3679 [2021-05-21 21:55:53,217 INFO L226 Difference]: Without dead ends: 3056 [2021-05-21 21:55:53,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 314.5ms TimeCoverageRelationStatistics Valid=381, Invalid=1179, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 21:55:53,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-05-21 21:55:53,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2388. [2021-05-21 21:55:53,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 2.785085881860075) internal successors, (6648), 2387 states have internal predecessors, (6648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:53,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6648 transitions. [2021-05-21 21:55:53,243 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6648 transitions. Word has length 80 [2021-05-21 21:55:53,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:53,243 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 6648 transitions. [2021-05-21 21:55:53,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:53,244 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6648 transitions. [2021-05-21 21:55:53,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 21:55:53,245 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:53,245 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:53,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:53,449 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:53,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:53,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1971075764, now seen corresponding path program 49 times [2021-05-21 21:55:53,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:53,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498717725] [2021-05-21 21:55:53,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:53,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:53,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498717725] [2021-05-21 21:55:53,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498717725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:53,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663764654] [2021-05-21 21:55:53,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:53,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 21:55:53,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:53,639 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:53,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663764654] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:53,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:53,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-05-21 21:55:53,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982009464] [2021-05-21 21:55:53,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:55:53,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:53,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:55:53,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:55:53,640 INFO L87 Difference]: Start difference. First operand 2388 states and 6648 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:53,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:53,905 INFO L93 Difference]: Finished difference Result 3908 states and 10481 transitions. [2021-05-21 21:55:53,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 21:55:53,906 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 21:55:53,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:53,909 INFO L225 Difference]: With dead ends: 3908 [2021-05-21 21:55:53,909 INFO L226 Difference]: Without dead ends: 3638 [2021-05-21 21:55:53,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 215.2ms TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 21:55:53,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3638 states. [2021-05-21 21:55:53,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3638 to 2568. [2021-05-21 21:55:53,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 2.8075574600701207) internal successors, (7207), 2567 states have internal predecessors, (7207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:53,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 7207 transitions. [2021-05-21 21:55:53,936 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 7207 transitions. Word has length 80 [2021-05-21 21:55:53,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:53,936 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 7207 transitions. [2021-05-21 21:55:53,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:53,937 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 7207 transitions. [2021-05-21 21:55:53,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 21:55:53,938 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:53,938 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:54,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-05-21 21:55:54,145 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:54,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:54,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1993419014, now seen corresponding path program 50 times [2021-05-21 21:55:54,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:54,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042458474] [2021-05-21 21:55:54,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:54,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:54,211 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:54,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:54,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042458474] [2021-05-21 21:55:54,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042458474] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:54,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333973289] [2021-05-21 21:55:54,211 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:54,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:55:54,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:54,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 21:55:54,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:54,349 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:54,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333973289] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:54,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:55:54,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-21 21:55:54,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15616293] [2021-05-21 21:55:54,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:55:54,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:54,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:55:54,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:55:54,350 INFO L87 Difference]: Start difference. First operand 2568 states and 7207 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:54,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:54,685 INFO L93 Difference]: Finished difference Result 3203 states and 8605 transitions. [2021-05-21 21:55:54,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 21:55:54,685 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 21:55:54,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:54,688 INFO L225 Difference]: With dead ends: 3203 [2021-05-21 21:55:54,688 INFO L226 Difference]: Without dead ends: 2831 [2021-05-21 21:55:54,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 300.8ms TimeCoverageRelationStatistics Valid=416, Invalid=1066, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:55:54,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2831 states. [2021-05-21 21:55:54,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2831 to 2483. [2021-05-21 21:55:54,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2482 states have (on average 2.78928283642224) internal successors, (6923), 2482 states have internal predecessors, (6923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:54,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 6923 transitions. [2021-05-21 21:55:54,709 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 6923 transitions. Word has length 80 [2021-05-21 21:55:54,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:54,709 INFO L482 AbstractCegarLoop]: Abstraction has 2483 states and 6923 transitions. [2021-05-21 21:55:54,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:54,709 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 6923 transitions. [2021-05-21 21:55:54,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-21 21:55:54,711 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:54,711 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:54,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-05-21 21:55:54,912 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:54,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:54,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1150498713, now seen corresponding path program 51 times [2021-05-21 21:55:54,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:54,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616038326] [2021-05-21 21:55:54,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:54,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 77 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:54,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:54,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616038326] [2021-05-21 21:55:54,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616038326] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:54,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561163485] [2021-05-21 21:55:54,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:55,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 21:55:55,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:55,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:55:55,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:55,118 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:55,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561163485] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:55:55,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-21 21:55:55,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-05-21 21:55:55,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985422268] [2021-05-21 21:55:55,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:55:55,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:55,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:55:55,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:55:55,120 INFO L87 Difference]: Start difference. First operand 2483 states and 6923 transitions. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:55,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:55,224 INFO L93 Difference]: Finished difference Result 5807 states and 15758 transitions. [2021-05-21 21:55:55,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 21:55:55,225 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-05-21 21:55:55,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:55,226 INFO L225 Difference]: With dead ends: 5807 [2021-05-21 21:55:55,226 INFO L226 Difference]: Without dead ends: 1279 [2021-05-21 21:55:55,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:55:55,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-05-21 21:55:55,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1279. [2021-05-21 21:55:55,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 1278 states have (on average 2.5610328638497655) internal successors, (3273), 1278 states have internal predecessors, (3273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:55,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 3273 transitions. [2021-05-21 21:55:55,236 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 3273 transitions. Word has length 85 [2021-05-21 21:55:55,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:55,236 INFO L482 AbstractCegarLoop]: Abstraction has 1279 states and 3273 transitions. [2021-05-21 21:55:55,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:55,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 3273 transitions. [2021-05-21 21:55:55,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-21 21:55:55,237 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:55,237 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:55,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:55,438 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:55,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:55,438 INFO L82 PathProgramCache]: Analyzing trace with hash -489817904, now seen corresponding path program 52 times [2021-05-21 21:55:55,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:55,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301409445] [2021-05-21 21:55:55,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:55,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:55,497 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 81 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:55,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:55,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301409445] [2021-05-21 21:55:55,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301409445] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:55:55,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569882782] [2021-05-21 21:55:55,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:55:55,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:55:55,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:55:55,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:55:55,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:55:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:55,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569882782] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:55:55,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-21 21:55:55,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-05-21 21:55:55,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928028642] [2021-05-21 21:55:55,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:55:55,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:55,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:55:55,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:55:55,627 INFO L87 Difference]: Start difference. First operand 1279 states and 3273 transitions. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:55,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:55,737 INFO L93 Difference]: Finished difference Result 2288 states and 5575 transitions. [2021-05-21 21:55:55,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 21:55:55,738 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-05-21 21:55:55,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:55,738 INFO L225 Difference]: With dead ends: 2288 [2021-05-21 21:55:55,738 INFO L226 Difference]: Without dead ends: 0 [2021-05-21 21:55:55,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 99.7ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:55:55,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-21 21:55:55,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-21 21:55:55,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:55,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-21 21:55:55,738 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 85 [2021-05-21 21:55:55,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:55:55,738 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-21 21:55:55,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:55,738 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-21 21:55:55,738 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-21 21:55:55,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-05-21 21:55:55,949 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-05-21 21:55:55,950 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-05-21 21:55:55,952 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 21:55:55,952 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 21:55:55,952 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 21:55:55,952 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 21:55:55,952 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 21:55:55,952 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 21:55:55,952 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 21:55:55,952 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-21 21:55:55,954 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-05-21 21:55:55,974 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:55,975 INFO L276 IsEmpty]: Start isEmpty. Operand has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:55:55,979 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-21 21:55:55,979 INFO L315 ceAbstractionStarter]: Result for error location InUseError was SAFE (2/2) [2021-05-21 21:55:55,980 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-21 21:55:55,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.05 09:55:55 BasicIcfg [2021-05-21 21:55:55,982 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-21 21:55:55,982 INFO L168 Benchmark]: Toolchain (without parser) took 38873.36 ms. Allocated memory was 331.4 MB in the beginning and 763.4 MB in the end (delta: 432.0 MB). Free memory was 294.0 MB in the beginning and 334.8 MB in the end (delta: -40.8 MB). Peak memory consumption was 393.2 MB. Max. memory is 16.0 GB. [2021-05-21 21:55:55,982 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 331.4 MB. Free memory was 312.1 MB in the beginning and 312.0 MB in the end (delta: 65.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 21:55:55,982 INFO L168 Benchmark]: CACSL2BoogieTranslator took 371.20 ms. Allocated memory is still 331.4 MB. Free memory was 293.8 MB in the beginning and 295.3 MB in the end (delta: -1.5 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.0 GB. [2021-05-21 21:55:55,982 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.02 ms. Allocated memory is still 331.4 MB. Free memory was 295.3 MB in the beginning and 293.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 21:55:55,982 INFO L168 Benchmark]: Boogie Preprocessor took 23.32 ms. Allocated memory is still 331.4 MB. Free memory was 293.2 MB in the beginning and 292.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 21:55:55,983 INFO L168 Benchmark]: RCFGBuilder took 308.74 ms. Allocated memory is still 331.4 MB. Free memory was 292.2 MB in the beginning and 268.0 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-05-21 21:55:55,983 INFO L168 Benchmark]: TraceAbstraction took 38143.37 ms. Allocated memory was 331.4 MB in the beginning and 763.4 MB in the end (delta: 432.0 MB). Free memory was 268.0 MB in the beginning and 334.8 MB in the end (delta: -66.8 MB). Peak memory consumption was 367.3 MB. Max. memory is 16.0 GB. [2021-05-21 21:55:55,986 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 331.4 MB. Free memory was 312.1 MB in the beginning and 312.0 MB in the end (delta: 65.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 371.20 ms. Allocated memory is still 331.4 MB. Free memory was 293.8 MB in the beginning and 295.3 MB in the end (delta: -1.5 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.02 ms. Allocated memory is still 331.4 MB. Free memory was 295.3 MB in the beginning and 293.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 23.32 ms. Allocated memory is still 331.4 MB. Free memory was 293.2 MB in the beginning and 292.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 308.74 ms. Allocated memory is still 331.4 MB. Free memory was 292.2 MB in the beginning and 268.0 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 38143.37 ms. Allocated memory was 331.4 MB in the beginning and 763.4 MB in the end (delta: 432.0 MB). Free memory was 268.0 MB in the beginning and 334.8 MB in the end (delta: -66.8 MB). Peak memory consumption was 367.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 38027.1ms, OverallIterations: 63, TraceHistogramMax: 6, EmptinessCheckTime: 142.0ms, AutomataDifference: 12215.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 79.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6276 SDtfs, 24236 SDslu, 39721 SDs, 0 SdLazy, 6940 SolverSat, 2749 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2980.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5368 GetRequests, 3809 SyntacticMatches, 0 SemanticMatches, 1559 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8583 ImplicationChecksByTransitivity, 10405.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2568occurred in iteration=60, InterpolantAutomatonStates: 1287, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1411.2ms AutomataMinimizationTime, 63 MinimizatonAttempts, 30890 StatesRemovedByMinimization, 61 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 495.8ms SsaConstructionTime, 1189.9ms SatisfiabilityAnalysisTime, 8807.1ms InterpolantComputationTime, 7864 NumberOfCodeBlocks, 7854 NumberOfCodeBlocksAsserted, 229 NumberOfCheckSat, 7745 ConstructedInterpolants, 0 QuantifiedInterpolants, 29437 SizeOfPredicates, 472 NumberOfNonLiveVariables, 8746 ConjunctsInSsa, 746 ConjunctsInUnsatCore, 119 InterpolantComputations, 9 PerfectInterpolantSequences, 373/4758 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 28.6ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 4.7ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 22.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1680occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...