/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -i ../../../trunk/examples/svcomp/pthread/triangular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-e5469eb [2021-01-20 11:59:21,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-20 11:59:21,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-20 11:59:21,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-20 11:59:21,568 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-20 11:59:21,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-20 11:59:21,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-20 11:59:21,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-20 11:59:21,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-20 11:59:21,581 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-20 11:59:21,583 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-20 11:59:21,586 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-20 11:59:21,586 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-20 11:59:21,588 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-20 11:59:21,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-20 11:59:21,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-20 11:59:21,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-20 11:59:21,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-20 11:59:21,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-20 11:59:21,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-20 11:59:21,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-20 11:59:21,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-20 11:59:21,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-20 11:59:21,619 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-20 11:59:21,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-20 11:59:21,643 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-20 11:59:21,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-20 11:59:21,650 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-20 11:59:21,651 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-20 11:59:21,653 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-20 11:59:21,653 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-20 11:59:21,654 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-20 11:59:21,654 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-20 11:59:21,655 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-20 11:59:21,656 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-20 11:59:21,658 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-20 11:59:21,659 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-01-20 11:59:21,717 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-20 11:59:21,718 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-20 11:59:21,720 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-20 11:59:21,720 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-20 11:59:21,720 INFO L138 SettingsManager]: * Use SBE=true [2021-01-20 11:59:21,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-20 11:59:21,721 INFO L138 SettingsManager]: * sizeof long=4 [2021-01-20 11:59:21,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-20 11:59:21,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-01-20 11:59:21,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-20 11:59:21,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-20 11:59:21,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-20 11:59:21,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-20 11:59:21,723 INFO L138 SettingsManager]: * sizeof long double=12 [2021-01-20 11:59:21,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-20 11:59:21,723 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-20 11:59:21,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-20 11:59:21,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-20 11:59:21,724 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-20 11:59:21,724 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-01-20 11:59:21,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-20 11:59:21,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-20 11:59:21,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-20 11:59:21,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-20 11:59:21,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-20 11:59:21,726 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-20 11:59:21,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-20 11:59:21,726 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-01-20 11:59:21,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-20 11:59:21,727 INFO L138 SettingsManager]: * Minimization of abstraction=NONE [2021-01-20 11:59:21,727 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-20 11:59:22,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-20 11:59:22,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-20 11:59:22,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-20 11:59:22,222 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-20 11:59:22,223 INFO L275 PluginConnector]: CDTParser initialized [2021-01-20 11:59:22,225 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2021-01-20 11:59:22,316 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cf853178/2133196366ed498190efb75abf8bf167/FLAGc8ab02cb7 [2021-01-20 11:59:23,172 INFO L306 CDTParser]: Found 1 translation units. [2021-01-20 11:59:23,173 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i [2021-01-20 11:59:23,192 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cf853178/2133196366ed498190efb75abf8bf167/FLAGc8ab02cb7 [2021-01-20 11:59:23,350 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cf853178/2133196366ed498190efb75abf8bf167 [2021-01-20 11:59:23,355 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-20 11:59:23,358 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-01-20 11:59:23,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-20 11:59:23,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-20 11:59:23,368 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-20 11:59:23,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:59:23" (1/1) ... [2021-01-20 11:59:23,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d926e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:59:23, skipping insertion in model container [2021-01-20 11:59:23,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:59:23" (1/1) ... [2021-01-20 11:59:23,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-20 11:59:23,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-20 11:59:24,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-20 11:59:24,137 INFO L203 MainTranslator]: Completed pre-run [2021-01-20 11:59:24,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-20 11:59:24,349 INFO L208 MainTranslator]: Completed translation [2021-01-20 11:59:24,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:59:24 WrapperNode [2021-01-20 11:59:24,350 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-20 11:59:24,353 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-20 11:59:24,353 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-20 11:59:24,353 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-20 11:59:24,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:59:24" (1/1) ... [2021-01-20 11:59:24,408 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:59:24" (1/1) ... [2021-01-20 11:59:24,443 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-20 11:59:24,445 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-20 11:59:24,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-20 11:59:24,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-20 11:59:24,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:59:24" (1/1) ... [2021-01-20 11:59:24,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:59:24" (1/1) ... [2021-01-20 11:59:24,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:59:24" (1/1) ... [2021-01-20 11:59:24,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:59:24" (1/1) ... [2021-01-20 11:59:24,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:59:24" (1/1) ... [2021-01-20 11:59:24,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:59:24" (1/1) ... [2021-01-20 11:59:24,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:59:24" (1/1) ... [2021-01-20 11:59:24,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-20 11:59:24,503 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-20 11:59:24,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-20 11:59:24,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-20 11:59:24,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:59:24" (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 [2021-01-20 11:59:24,605 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-01-20 11:59:24,605 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-01-20 11:59:24,605 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-01-20 11:59:24,605 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-01-20 11:59:24,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-20 11:59:24,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-01-20 11:59:24,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-20 11:59:24,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-20 11:59:24,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-20 11:59:24,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-01-20 11:59:24,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-20 11:59:24,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-20 11:59:24,609 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-01-20 11:59:25,084 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-20 11:59:25,084 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-20 11:59:25,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:59:25 BoogieIcfgContainer [2021-01-20 11:59:25,086 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-20 11:59:25,088 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-20 11:59:25,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-20 11:59:25,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-20 11:59:25,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 11:59:23" (1/3) ... [2021-01-20 11:59:25,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ac75fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:59:25, skipping insertion in model container [2021-01-20 11:59:25,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:59:24" (2/3) ... [2021-01-20 11:59:25,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ac75fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:59:25, skipping insertion in model container [2021-01-20 11:59:25,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:59:25" (3/3) ... [2021-01-20 11:59:25,096 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2021-01-20 11:59:25,113 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-01-20 11:59:25,114 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-20 11:59:25,118 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-20 11:59:25,119 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-01-20 11:59:25,152 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,152 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,153 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,153 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,153 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,154 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,154 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,154 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,154 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,154 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,155 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,155 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,155 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,155 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,156 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,156 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,156 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,156 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,157 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,157 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,157 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,157 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,158 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,158 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,158 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,158 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,158 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,159 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,159 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,159 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,160 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,160 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,160 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,160 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,161 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,161 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,161 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,161 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,162 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,162 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,162 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,162 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,163 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,163 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,163 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,163 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,163 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,164 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,164 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,164 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,164 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,165 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,165 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,165 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,165 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,165 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,168 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,169 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,169 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,169 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,169 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,169 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,176 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,177 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,177 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,177 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,177 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,177 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:59:25,184 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-01-20 11:59:25,198 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-20 11:59:25,222 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-20 11:59:25,223 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-20 11:59:25,223 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-20 11:59:25,223 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-20 11:59:25,223 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-20 11:59:25,223 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-20 11:59:25,223 INFO L383 AbstractCegarLoop]: Minimize is NONE [2021-01-20 11:59:25,223 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-20 11:59:25,235 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 65 places, 64 transitions, 138 flow [2021-01-20 11:59:25,416 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:25,428 INFO L276 IsEmpty]: Start isEmpty. Operand has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:25,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-20 11:59:25,454 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:25,456 INFO L504 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] [2021-01-20 11:59:25,457 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:25,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:25,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1900887756, now seen corresponding path program 1 times [2021-01-20 11:59:25,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:25,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454190529] [2021-01-20 11:59:25,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:25,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:26,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:59:26,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454190529] [2021-01-20 11:59:26,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:59:26,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-20 11:59:26,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135168992] [2021-01-20 11:59:26,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-20 11:59:26,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:26,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-20 11:59:26,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-20 11:59:26,170 INFO L87 Difference]: Start difference. First operand has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 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 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:26,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:26,470 INFO L93 Difference]: Finished difference Result 3336 states and 9728 transitions. [2021-01-20 11:59:26,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-20 11:59:26,472 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-01-20 11:59:26,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:26,504 INFO L225 Difference]: With dead ends: 3336 [2021-01-20 11:59:26,505 INFO L226 Difference]: Without dead ends: 1320 [2021-01-20 11:59:26,507 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-01-20 11:59:26,508 INFO L78 Accepts]: Start accepts. Automaton has 1320 states. Word has length 28 [2021-01-20 11:59:26,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:26,509 INFO L481 AbstractCegarLoop]: Abstraction has 1320 states. [2021-01-20 11:59:26,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:26,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states. [2021-01-20 11:59:26,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-20 11:59:26,515 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:26,516 INFO L504 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] [2021-01-20 11:59:26,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-20 11:59:26,516 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:26,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:26,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1199752031, now seen corresponding path program 1 times [2021-01-20 11:59:26,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:26,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140752708] [2021-01-20 11:59:26,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:59:26,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140752708] [2021-01-20 11:59:26,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:59:26,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-20 11:59:26,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296958547] [2021-01-20 11:59:26,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-20 11:59:26,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:26,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-20 11:59:26,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-20 11:59:26,758 INFO L87 Difference]: Start difference. First operand 1320 states. 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) [2021-01-20 11:59:26,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:26,943 INFO L93 Difference]: Finished difference Result 2619 states and 7228 transitions. [2021-01-20 11:59:26,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-20 11:59:26,944 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-01-20 11:59:26,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:26,964 INFO L225 Difference]: With dead ends: 2619 [2021-01-20 11:59:26,965 INFO L226 Difference]: Without dead ends: 2363 [2021-01-20 11:59:26,966 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-01-20 11:59:26,966 INFO L78 Accepts]: Start accepts. Automaton has 2363 states. Word has length 32 [2021-01-20 11:59:26,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:26,966 INFO L481 AbstractCegarLoop]: Abstraction has 2363 states. [2021-01-20 11:59:26,967 INFO L482 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) [2021-01-20 11:59:26,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2363 states. [2021-01-20 11:59:26,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-20 11:59:26,969 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:26,970 INFO L504 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] [2021-01-20 11:59:26,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-20 11:59:26,970 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:26,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:26,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1202725261, now seen corresponding path program 2 times [2021-01-20 11:59:26,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:26,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440121098] [2021-01-20 11:59:26,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:59:27,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440121098] [2021-01-20 11:59:27,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:59:27,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-20 11:59:27,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051633852] [2021-01-20 11:59:27,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-20 11:59:27,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:27,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-20 11:59:27,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-20 11:59:27,185 INFO L87 Difference]: Start difference. First operand 2363 states. 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) [2021-01-20 11:59:27,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:27,447 INFO L93 Difference]: Finished difference Result 1883 states and 4981 transitions. [2021-01-20 11:59:27,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-20 11:59:27,448 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 [2021-01-20 11:59:27,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:27,461 INFO L225 Difference]: With dead ends: 1883 [2021-01-20 11:59:27,461 INFO L226 Difference]: Without dead ends: 1438 [2021-01-20 11:59:27,462 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-01-20 11:59:27,462 INFO L78 Accepts]: Start accepts. Automaton has 1438 states. Word has length 32 [2021-01-20 11:59:27,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:27,463 INFO L481 AbstractCegarLoop]: Abstraction has 1438 states. [2021-01-20 11:59:27,463 INFO L482 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) [2021-01-20 11:59:27,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states. [2021-01-20 11:59:27,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-20 11:59:27,466 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:27,466 INFO L504 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] [2021-01-20 11:59:27,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-20 11:59:27,467 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:27,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:27,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1299742308, now seen corresponding path program 1 times [2021-01-20 11:59:27,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:27,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348681609] [2021-01-20 11:59:27,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:27,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:27,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:59:27,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348681609] [2021-01-20 11:59:27,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:59:27,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 11:59:27,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180807483] [2021-01-20 11:59:27,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 11:59:27,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:27,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 11:59:27,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-01-20 11:59:27,693 INFO L87 Difference]: Start difference. First operand 1438 states. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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) [2021-01-20 11:59:27,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:27,957 INFO L93 Difference]: Finished difference Result 2398 states and 6462 transitions. [2021-01-20 11:59:27,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-20 11:59:27,958 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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 [2021-01-20 11:59:27,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:27,976 INFO L225 Difference]: With dead ends: 2398 [2021-01-20 11:59:27,976 INFO L226 Difference]: Without dead ends: 2119 [2021-01-20 11:59:27,977 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-01-20 11:59:27,977 INFO L78 Accepts]: Start accepts. Automaton has 2119 states. Word has length 36 [2021-01-20 11:59:27,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:27,978 INFO L481 AbstractCegarLoop]: Abstraction has 2119 states. [2021-01-20 11:59:27,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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) [2021-01-20 11:59:27,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states. [2021-01-20 11:59:27,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-20 11:59:27,983 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:27,983 INFO L504 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] [2021-01-20 11:59:27,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-20 11:59:27,984 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:27,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:27,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1296769078, now seen corresponding path program 2 times [2021-01-20 11:59:27,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:27,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252463872] [2021-01-20 11:59:27,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:28,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:59:28,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252463872] [2021-01-20 11:59:28,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:59:28,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 11:59:28,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264843228] [2021-01-20 11:59:28,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 11:59:28,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:28,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 11:59:28,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-01-20 11:59:28,256 INFO L87 Difference]: Start difference. First operand 2119 states. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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) [2021-01-20 11:59:28,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:28,600 INFO L93 Difference]: Finished difference Result 1543 states and 3905 transitions. [2021-01-20 11:59:28,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-20 11:59:28,602 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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 [2021-01-20 11:59:28,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:28,612 INFO L225 Difference]: With dead ends: 1543 [2021-01-20 11:59:28,613 INFO L226 Difference]: Without dead ends: 1079 [2021-01-20 11:59:28,613 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-01-20 11:59:28,613 INFO L78 Accepts]: Start accepts. Automaton has 1079 states. Word has length 36 [2021-01-20 11:59:28,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:28,614 INFO L481 AbstractCegarLoop]: Abstraction has 1079 states. [2021-01-20 11:59:28,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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) [2021-01-20 11:59:28,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states. [2021-01-20 11:59:28,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-20 11:59:28,617 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:28,617 INFO L504 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] [2021-01-20 11:59:28,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-20 11:59:28,618 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:28,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:28,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1841087432, now seen corresponding path program 3 times [2021-01-20 11:59:28,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:28,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591584960] [2021-01-20 11:59:28,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:28,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:28,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:59:28,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591584960] [2021-01-20 11:59:28,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:59:28,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 11:59:28,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703866522] [2021-01-20 11:59:28,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 11:59:28,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:28,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 11:59:28,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-01-20 11:59:28,780 INFO L87 Difference]: Start difference. First operand 1079 states. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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) [2021-01-20 11:59:29,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:29,022 INFO L93 Difference]: Finished difference Result 1399 states and 3609 transitions. [2021-01-20 11:59:29,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-20 11:59:29,022 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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 [2021-01-20 11:59:29,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:29,031 INFO L225 Difference]: With dead ends: 1399 [2021-01-20 11:59:29,032 INFO L226 Difference]: Without dead ends: 1175 [2021-01-20 11:59:29,032 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-01-20 11:59:29,032 INFO L78 Accepts]: Start accepts. Automaton has 1175 states. Word has length 36 [2021-01-20 11:59:29,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:29,033 INFO L481 AbstractCegarLoop]: Abstraction has 1175 states. [2021-01-20 11:59:29,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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) [2021-01-20 11:59:29,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states. [2021-01-20 11:59:29,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-20 11:59:29,036 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:29,037 INFO L504 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] [2021-01-20 11:59:29,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-20 11:59:29,037 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:29,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:29,038 INFO L82 PathProgramCache]: Analyzing trace with hash -940103400, now seen corresponding path program 1 times [2021-01-20 11:59:29,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:29,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918586277] [2021-01-20 11:59:29,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:59:29,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918586277] [2021-01-20 11:59:29,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503173795] [2021-01-20 11:59:29,191 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 [2021-01-20 11:59:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:29,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-20 11:59:29,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:29,361 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:29,396 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:59:29,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:29,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-01-20 11:59:29,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011576827] [2021-01-20 11:59:29,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-20 11:59:29,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:29,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-20 11:59:29,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-01-20 11:59:29,409 INFO L87 Difference]: Start difference. First operand 1175 states. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:29,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:29,824 INFO L93 Difference]: Finished difference Result 1879 states and 4893 transitions. [2021-01-20 11:59:29,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-20 11:59:29,824 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-01-20 11:59:29,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:29,836 INFO L225 Difference]: With dead ends: 1879 [2021-01-20 11:59:29,837 INFO L226 Difference]: Without dead ends: 1455 [2021-01-20 11:59:29,837 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:59:29,838 INFO L78 Accepts]: Start accepts. Automaton has 1455 states. Word has length 41 [2021-01-20 11:59:29,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:29,838 INFO L481 AbstractCegarLoop]: Abstraction has 1455 states. [2021-01-20 11:59:29,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:29,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states. [2021-01-20 11:59:29,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-20 11:59:29,843 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:29,843 INFO L504 BasicCegarLoop]: trace histogram [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] [2021-01-20 11:59:30,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-20 11:59:30,058 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:30,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:30,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1546743908, now seen corresponding path program 1 times [2021-01-20 11:59:30,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:30,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919209921] [2021-01-20 11:59:30,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:30,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:30,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:30,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919209921] [2021-01-20 11:59:30,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901559318] [2021-01-20 11:59:30,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:59:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:30,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-20 11:59:30,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:30,374 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:30,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:30,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-01-20 11:59:30,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517088993] [2021-01-20 11:59:30,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-20 11:59:30,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:30,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-20 11:59:30,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-20 11:59:30,386 INFO L87 Difference]: Start difference. First operand 1455 states. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:30,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:30,547 INFO L93 Difference]: Finished difference Result 1855 states and 4685 transitions. [2021-01-20 11:59:30,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-20 11:59:30,548 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-01-20 11:59:30,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:30,558 INFO L225 Difference]: With dead ends: 1855 [2021-01-20 11:59:30,559 INFO L226 Difference]: Without dead ends: 1570 [2021-01-20 11:59:30,559 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-01-20 11:59:30,560 INFO L78 Accepts]: Start accepts. Automaton has 1570 states. Word has length 46 [2021-01-20 11:59:30,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:30,560 INFO L481 AbstractCegarLoop]: Abstraction has 1570 states. [2021-01-20 11:59:30,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:30,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states. [2021-01-20 11:59:30,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-20 11:59:30,565 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:30,565 INFO L504 BasicCegarLoop]: trace histogram [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] [2021-01-20 11:59:30,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:59:30,779 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:30,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:30,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1378232494, now seen corresponding path program 2 times [2021-01-20 11:59:30,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:30,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603623263] [2021-01-20 11:59:30,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:31,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:31,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603623263] [2021-01-20 11:59:31,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923565230] [2021-01-20 11:59:31,013 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 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 [2021-01-20 11:59:31,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:59:31,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:59:31,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-20 11:59:31,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:31,123 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:59:31,143 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:31,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:31,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:31,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-20 11:59:31,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424428929] [2021-01-20 11:59:31,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-20 11:59:31,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:31,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-20 11:59:31,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-01-20 11:59:31,156 INFO L87 Difference]: Start difference. First operand 1570 states. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 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) [2021-01-20 11:59:31,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:31,391 INFO L93 Difference]: Finished difference Result 2010 states and 4995 transitions. [2021-01-20 11:59:31,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-20 11:59:31,392 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 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 46 [2021-01-20 11:59:31,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:31,404 INFO L225 Difference]: With dead ends: 2010 [2021-01-20 11:59:31,404 INFO L226 Difference]: Without dead ends: 1710 [2021-01-20 11:59:31,405 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-01-20 11:59:31,405 INFO L78 Accepts]: Start accepts. Automaton has 1710 states. Word has length 46 [2021-01-20 11:59:31,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:31,407 INFO L481 AbstractCegarLoop]: Abstraction has 1710 states. [2021-01-20 11:59:31,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 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) [2021-01-20 11:59:31,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states. [2021-01-20 11:59:31,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-20 11:59:31,414 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:31,414 INFO L504 BasicCegarLoop]: trace histogram [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] [2021-01-20 11:59:31,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:59:31,630 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:31,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:31,631 INFO L82 PathProgramCache]: Analyzing trace with hash -443954361, now seen corresponding path program 1 times [2021-01-20 11:59:31,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:31,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909699873] [2021-01-20 11:59:31,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:31,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:59:31,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909699873] [2021-01-20 11:59:31,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269463703] [2021-01-20 11:59:31,830 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 [2021-01-20 11:59:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:31,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 11:59:31,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:32,046 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:32,073 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:59:32,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:32,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-20 11:59:32,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351182721] [2021-01-20 11:59:32,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-20 11:59:32,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:32,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-20 11:59:32,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-01-20 11:59:32,089 INFO L87 Difference]: Start difference. First operand 1710 states. 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) [2021-01-20 11:59:32,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:32,644 INFO L93 Difference]: Finished difference Result 2476 states and 6278 transitions. [2021-01-20 11:59:32,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-20 11:59:32,645 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 46 [2021-01-20 11:59:32,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:32,660 INFO L225 Difference]: With dead ends: 2476 [2021-01-20 11:59:32,660 INFO L226 Difference]: Without dead ends: 1975 [2021-01-20 11:59:32,661 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:59:32,662 INFO L78 Accepts]: Start accepts. Automaton has 1975 states. Word has length 46 [2021-01-20 11:59:32,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:32,664 INFO L481 AbstractCegarLoop]: Abstraction has 1975 states. [2021-01-20 11:59:32,664 INFO L482 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) [2021-01-20 11:59:32,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states. [2021-01-20 11:59:32,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-20 11:59:32,669 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:32,669 INFO L504 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] [2021-01-20 11:59:32,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:59:32,883 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:32,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:32,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1795867972, now seen corresponding path program 2 times [2021-01-20 11:59:32,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:32,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874149775] [2021-01-20 11:59:32,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:33,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874149775] [2021-01-20 11:59:33,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707872440] [2021-01-20 11:59:33,146 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 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 [2021-01-20 11:59:33,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:59:33,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:59:33,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 11:59:33,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:33,340 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:33,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:33,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:33,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-20 11:59:33,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40601805] [2021-01-20 11:59:33,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-20 11:59:33,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:33,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-20 11:59:33,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-01-20 11:59:33,357 INFO L87 Difference]: Start difference. First operand 1975 states. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:33,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:33,670 INFO L93 Difference]: Finished difference Result 2375 states and 5875 transitions. [2021-01-20 11:59:33,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-20 11:59:33,671 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-01-20 11:59:33,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:33,685 INFO L225 Difference]: With dead ends: 2375 [2021-01-20 11:59:33,686 INFO L226 Difference]: Without dead ends: 2090 [2021-01-20 11:59:33,686 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-01-20 11:59:33,686 INFO L78 Accepts]: Start accepts. Automaton has 2090 states. Word has length 51 [2021-01-20 11:59:33,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:33,687 INFO L481 AbstractCegarLoop]: Abstraction has 2090 states. [2021-01-20 11:59:33,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:33,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states. [2021-01-20 11:59:33,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-20 11:59:33,692 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:33,692 INFO L504 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] [2021-01-20 11:59:33,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-20 11:59:33,907 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:33,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:33,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1129108430, now seen corresponding path program 3 times [2021-01-20 11:59:33,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:33,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081630001] [2021-01-20 11:59:33,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:33,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:34,040 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:34,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081630001] [2021-01-20 11:59:34,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341949304] [2021-01-20 11:59:34,041 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 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 [2021-01-20 11:59:34,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:59:34,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:59:34,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 11:59:34,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:34,285 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:59:34,331 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:34,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:34,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:34,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-01-20 11:59:34,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022796323] [2021-01-20 11:59:34,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 11:59:34,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:34,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 11:59:34,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-01-20 11:59:34,344 INFO L87 Difference]: Start difference. First operand 2090 states. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:34,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:34,768 INFO L93 Difference]: Finished difference Result 2530 states and 6185 transitions. [2021-01-20 11:59:34,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-20 11:59:34,769 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-01-20 11:59:34,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:34,783 INFO L225 Difference]: With dead ends: 2530 [2021-01-20 11:59:34,783 INFO L226 Difference]: Without dead ends: 2230 [2021-01-20 11:59:34,784 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:59:34,784 INFO L78 Accepts]: Start accepts. Automaton has 2230 states. Word has length 51 [2021-01-20 11:59:34,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:34,784 INFO L481 AbstractCegarLoop]: Abstraction has 2230 states. [2021-01-20 11:59:34,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:34,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states. [2021-01-20 11:59:34,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-20 11:59:34,790 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:34,791 INFO L504 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] [2021-01-20 11:59:35,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:59:35,004 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:35,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:35,005 INFO L82 PathProgramCache]: Analyzing trace with hash -194830297, now seen corresponding path program 4 times [2021-01-20 11:59:35,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:35,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904239190] [2021-01-20 11:59:35,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:59:35,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904239190] [2021-01-20 11:59:35,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545641182] [2021-01-20 11:59:35,144 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 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 [2021-01-20 11:59:35,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:59:35,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:59:35,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:59:35,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:35,269 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:35,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:35,314 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:59:35,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:35,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-01-20 11:59:35,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958202472] [2021-01-20 11:59:35,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 11:59:35,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:35,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 11:59:35,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-01-20 11:59:35,317 INFO L87 Difference]: Start difference. First operand 2230 states. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:35,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:35,784 INFO L93 Difference]: Finished difference Result 3190 states and 8017 transitions. [2021-01-20 11:59:35,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-20 11:59:35,785 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-01-20 11:59:35,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:35,794 INFO L225 Difference]: With dead ends: 3190 [2021-01-20 11:59:35,794 INFO L226 Difference]: Without dead ends: 2495 [2021-01-20 11:59:35,795 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2021-01-20 11:59:35,795 INFO L78 Accepts]: Start accepts. Automaton has 2495 states. Word has length 51 [2021-01-20 11:59:35,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:35,795 INFO L481 AbstractCegarLoop]: Abstraction has 2495 states. [2021-01-20 11:59:35,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:35,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states. [2021-01-20 11:59:35,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-20 11:59:35,803 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:35,803 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:59:36,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:59:36,019 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:36,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:36,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1043229613, now seen corresponding path program 5 times [2021-01-20 11:59:36,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:36,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299552547] [2021-01-20 11:59:36,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:36,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299552547] [2021-01-20 11:59:36,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481022497] [2021-01-20 11:59:36,178 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 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 [2021-01-20 11:59:36,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 11:59:36,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:59:36,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:59:36,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:36,295 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:36,304 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:36,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:36,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-01-20 11:59:36,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853989608] [2021-01-20 11:59:36,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-20 11:59:36,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:36,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-20 11:59:36,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-20 11:59:36,306 INFO L87 Difference]: Start difference. First operand 2495 states. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:36,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:36,618 INFO L93 Difference]: Finished difference Result 2895 states and 7065 transitions. [2021-01-20 11:59:36,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-20 11:59:36,619 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-01-20 11:59:36,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:36,628 INFO L225 Difference]: With dead ends: 2895 [2021-01-20 11:59:36,629 INFO L226 Difference]: Without dead ends: 2595 [2021-01-20 11:59:36,629 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-01-20 11:59:36,629 INFO L78 Accepts]: Start accepts. Automaton has 2595 states. Word has length 56 [2021-01-20 11:59:36,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:36,630 INFO L481 AbstractCegarLoop]: Abstraction has 2595 states. [2021-01-20 11:59:36,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:36,630 INFO L276 IsEmpty]: Start isEmpty. Operand 2595 states. [2021-01-20 11:59:36,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-20 11:59:36,637 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:36,638 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:59:36,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-20 11:59:36,853 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:36,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:36,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1387222591, now seen corresponding path program 6 times [2021-01-20 11:59:36,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:36,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628576879] [2021-01-20 11:59:36,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:37,034 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:37,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628576879] [2021-01-20 11:59:37,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020876199] [2021-01-20 11:59:37,035 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 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 [2021-01-20 11:59:37,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:59:37,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:59:37,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:59:37,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:37,160 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:59:37,184 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:37,195 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:37,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:37,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-20 11:59:37,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689694962] [2021-01-20 11:59:37,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 11:59:37,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:37,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 11:59:37,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-01-20 11:59:37,198 INFO L87 Difference]: Start difference. First operand 2595 states. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 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) [2021-01-20 11:59:37,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:37,551 INFO L93 Difference]: Finished difference Result 2995 states and 7265 transitions. [2021-01-20 11:59:37,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-20 11:59:37,552 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 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 56 [2021-01-20 11:59:37,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:37,568 INFO L225 Difference]: With dead ends: 2995 [2021-01-20 11:59:37,568 INFO L226 Difference]: Without dead ends: 2695 [2021-01-20 11:59:37,572 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:59:37,572 INFO L78 Accepts]: Start accepts. Automaton has 2695 states. Word has length 56 [2021-01-20 11:59:37,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:37,572 INFO L481 AbstractCegarLoop]: Abstraction has 2695 states. [2021-01-20 11:59:37,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 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) [2021-01-20 11:59:37,573 INFO L276 IsEmpty]: Start isEmpty. Operand 2695 states. [2021-01-20 11:59:37,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-20 11:59:37,580 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:37,581 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:59:37,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-20 11:59:37,797 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:37,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:37,798 INFO L82 PathProgramCache]: Analyzing trace with hash -23367961, now seen corresponding path program 7 times [2021-01-20 11:59:37,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:37,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14234473] [2021-01-20 11:59:37,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:37,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:37,992 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:37,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14234473] [2021-01-20 11:59:37,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013194363] [2021-01-20 11:59:37,993 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 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 [2021-01-20 11:59:38,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:38,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:59:38,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:38,078 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:38,100 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:38,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:38,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-01-20 11:59:38,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626237100] [2021-01-20 11:59:38,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-20 11:59:38,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:38,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-20 11:59:38,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-01-20 11:59:38,103 INFO L87 Difference]: Start difference. First operand 2695 states. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:38,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:38,382 INFO L93 Difference]: Finished difference Result 3225 states and 7725 transitions. [2021-01-20 11:59:38,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-20 11:59:38,384 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-01-20 11:59:38,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:38,394 INFO L225 Difference]: With dead ends: 3225 [2021-01-20 11:59:38,394 INFO L226 Difference]: Without dead ends: 2925 [2021-01-20 11:59:38,394 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:59:38,394 INFO L78 Accepts]: Start accepts. Automaton has 2925 states. Word has length 56 [2021-01-20 11:59:38,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:38,395 INFO L481 AbstractCegarLoop]: Abstraction has 2925 states. [2021-01-20 11:59:38,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:38,395 INFO L276 IsEmpty]: Start isEmpty. Operand 2925 states. [2021-01-20 11:59:38,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-20 11:59:38,403 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:38,403 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:59:38,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-20 11:59:38,619 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:38,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:38,620 INFO L82 PathProgramCache]: Analyzing trace with hash 701442583, now seen corresponding path program 8 times [2021-01-20 11:59:38,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:38,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223813797] [2021-01-20 11:59:38,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:38,761 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:38,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223813797] [2021-01-20 11:59:38,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755973310] [2021-01-20 11:59:38,761 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 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 [2021-01-20 11:59:38,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:59:38,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:59:38,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:59:38,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:38,908 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:59:38,926 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:38,934 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:38,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:38,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-20 11:59:38,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459417312] [2021-01-20 11:59:38,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 11:59:38,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:38,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 11:59:38,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-01-20 11:59:38,936 INFO L87 Difference]: Start difference. First operand 2925 states. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 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) [2021-01-20 11:59:39,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:39,360 INFO L93 Difference]: Finished difference Result 3435 states and 8145 transitions. [2021-01-20 11:59:39,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-20 11:59:39,361 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 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 56 [2021-01-20 11:59:39,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:39,369 INFO L225 Difference]: With dead ends: 3435 [2021-01-20 11:59:39,369 INFO L226 Difference]: Without dead ends: 3135 [2021-01-20 11:59:39,370 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:59:39,370 INFO L78 Accepts]: Start accepts. Automaton has 3135 states. Word has length 56 [2021-01-20 11:59:39,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:39,370 INFO L481 AbstractCegarLoop]: Abstraction has 3135 states. [2021-01-20 11:59:39,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 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) [2021-01-20 11:59:39,371 INFO L276 IsEmpty]: Start isEmpty. Operand 3135 states. [2021-01-20 11:59:39,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-20 11:59:39,377 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:39,377 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-01-20 11:59:39,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-20 11:59:39,591 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:39,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:39,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1901571208, now seen corresponding path program 9 times [2021-01-20 11:59:39,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:39,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954898762] [2021-01-20 11:59:39,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:39,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:39,733 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:59:39,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954898762] [2021-01-20 11:59:39,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821658737] [2021-01-20 11:59:39,734 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 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 [2021-01-20 11:59:39,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-20 11:59:39,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:59:39,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:59:39,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:39,873 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:59:39,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:39,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-01-20 11:59:39,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638255746] [2021-01-20 11:59:39,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 11:59:39,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:39,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 11:59:39,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-20 11:59:39,885 INFO L87 Difference]: Start difference. First operand 3135 states. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 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) [2021-01-20 11:59:40,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:40,468 INFO L93 Difference]: Finished difference Result 4285 states and 10452 transitions. [2021-01-20 11:59:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-20 11:59:40,469 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 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 56 [2021-01-20 11:59:40,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:40,485 INFO L225 Difference]: With dead ends: 4285 [2021-01-20 11:59:40,485 INFO L226 Difference]: Without dead ends: 3590 [2021-01-20 11:59:40,486 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-01-20 11:59:40,486 INFO L78 Accepts]: Start accepts. Automaton has 3590 states. Word has length 56 [2021-01-20 11:59:40,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:40,487 INFO L481 AbstractCegarLoop]: Abstraction has 3590 states. [2021-01-20 11:59:40,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 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) [2021-01-20 11:59:40,487 INFO L276 IsEmpty]: Start isEmpty. Operand 3590 states. [2021-01-20 11:59:40,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 11:59:40,497 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:40,497 INFO L504 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] [2021-01-20 11:59:40,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-20 11:59:40,712 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:40,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:40,713 INFO L82 PathProgramCache]: Analyzing trace with hash 674124083, now seen corresponding path program 10 times [2021-01-20 11:59:40,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:40,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586098424] [2021-01-20 11:59:40,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:40,946 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:40,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586098424] [2021-01-20 11:59:40,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679956557] [2021-01-20 11:59:40,947 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 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 [2021-01-20 11:59:41,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:59:41,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:59:41,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:59:41,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:41,125 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:41,138 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:41,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:41,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-01-20 11:59:41,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225493974] [2021-01-20 11:59:41,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 11:59:41,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:41,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 11:59:41,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-01-20 11:59:41,141 INFO L87 Difference]: Start difference. First operand 3590 states. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:41,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:41,432 INFO L93 Difference]: Finished difference Result 3990 states and 9500 transitions. [2021-01-20 11:59:41,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-20 11:59:41,432 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-20 11:59:41,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:41,443 INFO L225 Difference]: With dead ends: 3990 [2021-01-20 11:59:41,443 INFO L226 Difference]: Without dead ends: 3690 [2021-01-20 11:59:41,444 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:59:41,444 INFO L78 Accepts]: Start accepts. Automaton has 3690 states. Word has length 61 [2021-01-20 11:59:41,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:41,444 INFO L481 AbstractCegarLoop]: Abstraction has 3690 states. [2021-01-20 11:59:41,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:41,445 INFO L276 IsEmpty]: Start isEmpty. Operand 3690 states. [2021-01-20 11:59:41,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 11:59:41,453 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:41,453 INFO L504 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] [2021-01-20 11:59:41,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:59:41,667 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:41,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:41,668 INFO L82 PathProgramCache]: Analyzing trace with hash 330131105, now seen corresponding path program 11 times [2021-01-20 11:59:41,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:41,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701871998] [2021-01-20 11:59:41,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:41,933 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:41,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701871998] [2021-01-20 11:59:41,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32673780] [2021-01-20 11:59:41,934 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 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 [2021-01-20 11:59:42,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 11:59:42,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:59:42,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:59:42,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:42,065 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:59:42,093 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:42,106 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:42,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:42,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-20 11:59:42,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625551716] [2021-01-20 11:59:42,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 11:59:42,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:42,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 11:59:42,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-01-20 11:59:42,109 INFO L87 Difference]: Start difference. First operand 3690 states. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:42,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:42,524 INFO L93 Difference]: Finished difference Result 4090 states and 9700 transitions. [2021-01-20 11:59:42,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-20 11:59:42,525 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-20 11:59:42,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:42,536 INFO L225 Difference]: With dead ends: 4090 [2021-01-20 11:59:42,536 INFO L226 Difference]: Without dead ends: 3790 [2021-01-20 11:59:42,536 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2021-01-20 11:59:42,537 INFO L78 Accepts]: Start accepts. Automaton has 3790 states. Word has length 61 [2021-01-20 11:59:42,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:42,537 INFO L481 AbstractCegarLoop]: Abstraction has 3790 states. [2021-01-20 11:59:42,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:42,537 INFO L276 IsEmpty]: Start isEmpty. Operand 3790 states. [2021-01-20 11:59:42,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 11:59:42,544 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:42,544 INFO L504 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] [2021-01-20 11:59:42,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:59:42,759 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:42,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:42,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1693985735, now seen corresponding path program 12 times [2021-01-20 11:59:42,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:42,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283081225] [2021-01-20 11:59:42,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:42,900 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:42,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283081225] [2021-01-20 11:59:42,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571807640] [2021-01-20 11:59:42,901 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 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 [2021-01-20 11:59:42,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 11:59:42,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:59:42,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:59:42,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:43,000 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:43,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:43,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-01-20 11:59:43,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537118010] [2021-01-20 11:59:43,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 11:59:43,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:43,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 11:59:43,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-01-20 11:59:43,011 INFO L87 Difference]: Start difference. First operand 3790 states. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:43,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:43,347 INFO L93 Difference]: Finished difference Result 4320 states and 10160 transitions. [2021-01-20 11:59:43,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-20 11:59:43,348 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-20 11:59:43,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:43,360 INFO L225 Difference]: With dead ends: 4320 [2021-01-20 11:59:43,360 INFO L226 Difference]: Without dead ends: 4020 [2021-01-20 11:59:43,361 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:59:43,362 INFO L78 Accepts]: Start accepts. Automaton has 4020 states. Word has length 61 [2021-01-20 11:59:43,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:43,362 INFO L481 AbstractCegarLoop]: Abstraction has 4020 states. [2021-01-20 11:59:43,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:43,362 INFO L276 IsEmpty]: Start isEmpty. Operand 4020 states. [2021-01-20 11:59:43,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 11:59:43,371 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:43,371 INFO L504 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] [2021-01-20 11:59:43,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-20 11:59:43,584 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:43,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:43,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1876171017, now seen corresponding path program 13 times [2021-01-20 11:59:43,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:43,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419217196] [2021-01-20 11:59:43,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:43,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419217196] [2021-01-20 11:59:43,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590475479] [2021-01-20 11:59:43,804 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 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 [2021-01-20 11:59:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:43,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:59:43,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:43,906 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:59:43,922 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:43,935 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:43,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:43,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-20 11:59:43,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972420473] [2021-01-20 11:59:43,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 11:59:43,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:43,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 11:59:43,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-01-20 11:59:43,937 INFO L87 Difference]: Start difference. First operand 4020 states. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:44,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:44,396 INFO L93 Difference]: Finished difference Result 4460 states and 10440 transitions. [2021-01-20 11:59:44,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-20 11:59:44,397 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-20 11:59:44,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:44,407 INFO L225 Difference]: With dead ends: 4460 [2021-01-20 11:59:44,408 INFO L226 Difference]: Without dead ends: 4160 [2021-01-20 11:59:44,409 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2021-01-20 11:59:44,410 INFO L78 Accepts]: Start accepts. Automaton has 4160 states. Word has length 61 [2021-01-20 11:59:44,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:44,410 INFO L481 AbstractCegarLoop]: Abstraction has 4160 states. [2021-01-20 11:59:44,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:44,410 INFO L276 IsEmpty]: Start isEmpty. Operand 4160 states. [2021-01-20 11:59:44,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 11:59:44,418 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:44,418 INFO L504 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] [2021-01-20 11:59:44,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:59:44,632 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:44,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:44,632 INFO L82 PathProgramCache]: Analyzing trace with hash -184217512, now seen corresponding path program 14 times [2021-01-20 11:59:44,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:44,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323108382] [2021-01-20 11:59:44,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:44,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:44,775 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:59:44,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323108382] [2021-01-20 11:59:44,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360898106] [2021-01-20 11:59:44,776 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 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 [2021-01-20 11:59:44,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:59:44,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:59:44,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:59:44,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:44,932 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:59:44,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:44,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-01-20 11:59:44,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325041298] [2021-01-20 11:59:44,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 11:59:44,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:44,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 11:59:44,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-01-20 11:59:44,943 INFO L87 Difference]: Start difference. First operand 4160 states. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:45,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:45,673 INFO L93 Difference]: Finished difference Result 5120 states and 12272 transitions. [2021-01-20 11:59:45,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-20 11:59:45,674 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-20 11:59:45,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:45,683 INFO L225 Difference]: With dead ends: 5120 [2021-01-20 11:59:45,683 INFO L226 Difference]: Without dead ends: 4425 [2021-01-20 11:59:45,684 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=281, Invalid=841, Unknown=0, NotChecked=0, Total=1122 [2021-01-20 11:59:45,684 INFO L78 Accepts]: Start accepts. Automaton has 4425 states. Word has length 61 [2021-01-20 11:59:45,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:45,685 INFO L481 AbstractCegarLoop]: Abstraction has 4425 states. [2021-01-20 11:59:45,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:45,685 INFO L276 IsEmpty]: Start isEmpty. Operand 4425 states. [2021-01-20 11:59:45,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 11:59:45,694 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:45,695 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-01-20 11:59:45,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-20 11:59:45,910 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:45,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:45,911 INFO L82 PathProgramCache]: Analyzing trace with hash -446375550, now seen corresponding path program 15 times [2021-01-20 11:59:45,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:45,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543226207] [2021-01-20 11:59:45,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:46,159 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:46,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543226207] [2021-01-20 11:59:46,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085538806] [2021-01-20 11:59:46,162 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 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 [2021-01-20 11:59:46,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-20 11:59:46,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:59:46,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:59:46,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:46,307 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:46,326 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:46,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:46,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-20 11:59:46,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561018340] [2021-01-20 11:59:46,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 11:59:46,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:46,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 11:59:46,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-01-20 11:59:46,328 INFO L87 Difference]: Start difference. First operand 4425 states. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:46,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:46,711 INFO L93 Difference]: Finished difference Result 4825 states and 11320 transitions. [2021-01-20 11:59:46,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-20 11:59:46,713 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-20 11:59:46,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:46,723 INFO L225 Difference]: With dead ends: 4825 [2021-01-20 11:59:46,723 INFO L226 Difference]: Without dead ends: 4525 [2021-01-20 11:59:46,724 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:59:46,724 INFO L78 Accepts]: Start accepts. Automaton has 4525 states. Word has length 66 [2021-01-20 11:59:46,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:46,725 INFO L481 AbstractCegarLoop]: Abstraction has 4525 states. [2021-01-20 11:59:46,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:46,725 INFO L276 IsEmpty]: Start isEmpty. Operand 4525 states. [2021-01-20 11:59:46,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 11:59:46,738 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:46,738 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-01-20 11:59:46,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-20 11:59:46,952 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:46,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:46,952 INFO L82 PathProgramCache]: Analyzing trace with hash 2064809328, now seen corresponding path program 16 times [2021-01-20 11:59:46,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:46,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211056013] [2021-01-20 11:59:46,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:47,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211056013] [2021-01-20 11:59:47,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299625870] [2021-01-20 11:59:47,215 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 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 [2021-01-20 11:59:47,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:59:47,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:59:47,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:59:47,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:47,330 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:59:47,376 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:47,387 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:47,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:47,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-01-20 11:59:47,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621074550] [2021-01-20 11:59:47,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 11:59:47,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:47,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 11:59:47,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-01-20 11:59:47,389 INFO L87 Difference]: Start difference. First operand 4525 states. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:47,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:47,741 INFO L93 Difference]: Finished difference Result 4925 states and 11520 transitions. [2021-01-20 11:59:47,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-20 11:59:47,742 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-20 11:59:47,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:47,751 INFO L225 Difference]: With dead ends: 4925 [2021-01-20 11:59:47,751 INFO L226 Difference]: Without dead ends: 4625 [2021-01-20 11:59:47,752 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2021-01-20 11:59:47,752 INFO L78 Accepts]: Start accepts. Automaton has 4625 states. Word has length 66 [2021-01-20 11:59:47,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:47,753 INFO L481 AbstractCegarLoop]: Abstraction has 4625 states. [2021-01-20 11:59:47,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:47,753 INFO L276 IsEmpty]: Start isEmpty. Operand 4625 states. [2021-01-20 11:59:47,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 11:59:47,763 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:47,763 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-01-20 11:59:47,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-20 11:59:47,976 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:47,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:47,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1331530518, now seen corresponding path program 17 times [2021-01-20 11:59:47,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:47,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275581485] [2021-01-20 11:59:47,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:47,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:48,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275581485] [2021-01-20 11:59:48,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832467518] [2021-01-20 11:59:48,152 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 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 [2021-01-20 11:59:48,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 11:59:48,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:59:48,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:59:48,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:48,276 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:48,285 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:48,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:48,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-20 11:59:48,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74374924] [2021-01-20 11:59:48,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 11:59:48,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:48,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 11:59:48,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-01-20 11:59:48,287 INFO L87 Difference]: Start difference. First operand 4625 states. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:48,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:48,647 INFO L93 Difference]: Finished difference Result 5025 states and 11720 transitions. [2021-01-20 11:59:48,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-20 11:59:48,648 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-20 11:59:48,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:48,654 INFO L225 Difference]: With dead ends: 5025 [2021-01-20 11:59:48,655 INFO L226 Difference]: Without dead ends: 4725 [2021-01-20 11:59:48,655 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-01-20 11:59:48,655 INFO L78 Accepts]: Start accepts. Automaton has 4725 states. Word has length 66 [2021-01-20 11:59:48,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:48,656 INFO L481 AbstractCegarLoop]: Abstraction has 4725 states. [2021-01-20 11:59:48,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:48,656 INFO L276 IsEmpty]: Start isEmpty. Operand 4725 states. [2021-01-20 11:59:48,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 11:59:48,664 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:48,664 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-01-20 11:59:48,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-20 11:59:48,879 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:48,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:48,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1346701894, now seen corresponding path program 18 times [2021-01-20 11:59:48,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:48,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25204046] [2021-01-20 11:59:48,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:48,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:49,130 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:49,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25204046] [2021-01-20 11:59:49,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518238122] [2021-01-20 11:59:49,131 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 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 [2021-01-20 11:59:49,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 11:59:49,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:59:49,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:59:49,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:49,242 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:59:49,285 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:49,296 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:49,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:49,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-01-20 11:59:49,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512213197] [2021-01-20 11:59:49,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 11:59:49,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:49,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 11:59:49,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-01-20 11:59:49,298 INFO L87 Difference]: Start difference. First operand 4725 states. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:49,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:49,828 INFO L93 Difference]: Finished difference Result 5225 states and 12120 transitions. [2021-01-20 11:59:49,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-20 11:59:49,829 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-20 11:59:49,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:49,838 INFO L225 Difference]: With dead ends: 5225 [2021-01-20 11:59:49,838 INFO L226 Difference]: Without dead ends: 4925 [2021-01-20 11:59:49,839 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-01-20 11:59:49,839 INFO L78 Accepts]: Start accepts. Automaton has 4925 states. Word has length 66 [2021-01-20 11:59:49,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:49,839 INFO L481 AbstractCegarLoop]: Abstraction has 4925 states. [2021-01-20 11:59:49,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:49,840 INFO L276 IsEmpty]: Start isEmpty. Operand 4925 states. [2021-01-20 11:59:49,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 11:59:49,847 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:49,847 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-01-20 11:59:50,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-20 11:59:50,048 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:50,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:50,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1492528600, now seen corresponding path program 19 times [2021-01-20 11:59:50,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:50,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629487656] [2021-01-20 11:59:50,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:50,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:50,210 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:50,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629487656] [2021-01-20 11:59:50,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665663344] [2021-01-20 11:59:50,211 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 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 [2021-01-20 11:59:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:50,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:59:50,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:50,350 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:50,361 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:50,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:50,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-20 11:59:50,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335408062] [2021-01-20 11:59:50,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 11:59:50,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:50,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 11:59:50,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-01-20 11:59:50,363 INFO L87 Difference]: Start difference. First operand 4925 states. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:50,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:50,790 INFO L93 Difference]: Finished difference Result 5455 states and 12580 transitions. [2021-01-20 11:59:50,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 11:59:50,791 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-20 11:59:50,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:50,800 INFO L225 Difference]: With dead ends: 5455 [2021-01-20 11:59:50,800 INFO L226 Difference]: Without dead ends: 5155 [2021-01-20 11:59:50,801 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-01-20 11:59:50,801 INFO L78 Accepts]: Start accepts. Automaton has 5155 states. Word has length 66 [2021-01-20 11:59:50,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:50,801 INFO L481 AbstractCegarLoop]: Abstraction has 5155 states. [2021-01-20 11:59:50,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:50,802 INFO L276 IsEmpty]: Start isEmpty. Operand 5155 states. [2021-01-20 11:59:50,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 11:59:50,812 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:50,812 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-01-20 11:59:51,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:59:51,016 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:51,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:51,017 INFO L82 PathProgramCache]: Analyzing trace with hash -2077628152, now seen corresponding path program 20 times [2021-01-20 11:59:51,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:51,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49996076] [2021-01-20 11:59:51,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:51,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:51,194 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:51,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49996076] [2021-01-20 11:59:51,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239728380] [2021-01-20 11:59:51,194 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 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 [2021-01-20 11:59:51,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:59:51,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:59:51,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:59:51,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:51,294 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:59:51,330 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:51,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:51,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-01-20 11:59:51,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484197501] [2021-01-20 11:59:51,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 11:59:51,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:51,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 11:59:51,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-01-20 11:59:51,341 INFO L87 Difference]: Start difference. First operand 5155 states. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:51,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:51,968 INFO L93 Difference]: Finished difference Result 5595 states and 12860 transitions. [2021-01-20 11:59:51,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-20 11:59:51,969 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-20 11:59:51,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:51,976 INFO L225 Difference]: With dead ends: 5595 [2021-01-20 11:59:51,976 INFO L226 Difference]: Without dead ends: 5295 [2021-01-20 11:59:51,977 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=652, Unknown=0, NotChecked=0, Total=870 [2021-01-20 11:59:51,977 INFO L78 Accepts]: Start accepts. Automaton has 5295 states. Word has length 66 [2021-01-20 11:59:51,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:51,978 INFO L481 AbstractCegarLoop]: Abstraction has 5295 states. [2021-01-20 11:59:51,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:51,978 INFO L276 IsEmpty]: Start isEmpty. Operand 5295 states. [2021-01-20 11:59:51,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 11:59:51,987 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:51,987 INFO L504 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] [2021-01-20 11:59:52,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-20 11:59:52,203 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:52,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:52,204 INFO L82 PathProgramCache]: Analyzing trace with hash -385674647, now seen corresponding path program 21 times [2021-01-20 11:59:52,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:52,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633817330] [2021-01-20 11:59:52,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:52,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:52,410 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:59:52,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633817330] [2021-01-20 11:59:52,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768462280] [2021-01-20 11:59:52,410 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 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 [2021-01-20 11:59:52,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-20 11:59:52,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:59:52,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:59:52,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:52,570 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:59:52,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:52,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-01-20 11:59:52,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379391608] [2021-01-20 11:59:52,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 11:59:52,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:52,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 11:59:52,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-01-20 11:59:52,580 INFO L87 Difference]: Start difference. First operand 5295 states. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 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) [2021-01-20 11:59:53,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:53,365 INFO L93 Difference]: Finished difference Result 6255 states and 14692 transitions. [2021-01-20 11:59:53,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-20 11:59:53,367 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 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 66 [2021-01-20 11:59:53,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:53,376 INFO L225 Difference]: With dead ends: 6255 [2021-01-20 11:59:53,376 INFO L226 Difference]: Without dead ends: 5560 [2021-01-20 11:59:53,378 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=321, Invalid=1011, Unknown=0, NotChecked=0, Total=1332 [2021-01-20 11:59:53,379 INFO L78 Accepts]: Start accepts. Automaton has 5560 states. Word has length 66 [2021-01-20 11:59:53,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:53,379 INFO L481 AbstractCegarLoop]: Abstraction has 5560 states. [2021-01-20 11:59:53,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 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) [2021-01-20 11:59:53,379 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states. [2021-01-20 11:59:53,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 11:59:53,388 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:53,389 INFO L504 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] [2021-01-20 11:59:53,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:59:53,604 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:53,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:53,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1143144034, now seen corresponding path program 22 times [2021-01-20 11:59:53,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:53,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533447485] [2021-01-20 11:59:53,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:53,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:53,798 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:53,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533447485] [2021-01-20 11:59:53,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130322414] [2021-01-20 11:59:53,799 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 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 [2021-01-20 11:59:53,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:59:53,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:59:53,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 11:59:53,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:53,895 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:53,906 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:53,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:53,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-01-20 11:59:53,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719182190] [2021-01-20 11:59:53,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 11:59:53,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:53,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 11:59:53,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-01-20 11:59:53,908 INFO L87 Difference]: Start difference. First operand 5560 states. Second operand has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:54,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:54,251 INFO L93 Difference]: Finished difference Result 5960 states and 13740 transitions. [2021-01-20 11:59:54,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-20 11:59:54,253 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-20 11:59:54,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:54,262 INFO L225 Difference]: With dead ends: 5960 [2021-01-20 11:59:54,262 INFO L226 Difference]: Without dead ends: 5660 [2021-01-20 11:59:54,262 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-01-20 11:59:54,262 INFO L78 Accepts]: Start accepts. Automaton has 5660 states. Word has length 71 [2021-01-20 11:59:54,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:54,263 INFO L481 AbstractCegarLoop]: Abstraction has 5660 states. [2021-01-20 11:59:54,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:54,263 INFO L276 IsEmpty]: Start isEmpty. Operand 5660 states. [2021-01-20 11:59:54,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 11:59:54,352 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:54,352 INFO L504 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] [2021-01-20 11:59:54,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-20 11:59:54,553 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:54,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:54,554 INFO L82 PathProgramCache]: Analyzing trace with hash -640638384, now seen corresponding path program 23 times [2021-01-20 11:59:54,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:54,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417339158] [2021-01-20 11:59:54,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:54,770 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:54,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417339158] [2021-01-20 11:59:54,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295038022] [2021-01-20 11:59:54,771 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 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 [2021-01-20 11:59:54,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-20 11:59:54,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:59:54,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:59:54,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:54,880 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:59:54,899 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:54,912 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:54,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:54,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-20 11:59:54,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429428458] [2021-01-20 11:59:54,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 11:59:54,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:54,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 11:59:54,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-01-20 11:59:54,915 INFO L87 Difference]: Start difference. First operand 5660 states. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 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) [2021-01-20 11:59:55,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:55,389 INFO L93 Difference]: Finished difference Result 6060 states and 13940 transitions. [2021-01-20 11:59:55,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-20 11:59:55,389 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 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 71 [2021-01-20 11:59:55,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:55,397 INFO L225 Difference]: With dead ends: 6060 [2021-01-20 11:59:55,397 INFO L226 Difference]: Without dead ends: 5760 [2021-01-20 11:59:55,398 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-01-20 11:59:55,398 INFO L78 Accepts]: Start accepts. Automaton has 5760 states. Word has length 71 [2021-01-20 11:59:55,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:55,399 INFO L481 AbstractCegarLoop]: Abstraction has 5760 states. [2021-01-20 11:59:55,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 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) [2021-01-20 11:59:55,399 INFO L276 IsEmpty]: Start isEmpty. Operand 5760 states. [2021-01-20 11:59:55,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 11:59:55,407 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:55,407 INFO L504 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] [2021-01-20 11:59:55,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:59:55,617 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:55,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:55,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1373917194, now seen corresponding path program 24 times [2021-01-20 11:59:55,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:55,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841276642] [2021-01-20 11:59:55,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:55,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841276642] [2021-01-20 11:59:55,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721774574] [2021-01-20 11:59:55,806 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 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 [2021-01-20 11:59:55,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-20 11:59:55,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:59:55,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:59:55,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:55,908 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:55,927 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:55,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:55,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-01-20 11:59:55,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63299458] [2021-01-20 11:59:55,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 11:59:55,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:55,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 11:59:55,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-01-20 11:59:55,939 INFO L87 Difference]: Start difference. First operand 5760 states. Second operand has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:56,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:56,351 INFO L93 Difference]: Finished difference Result 6160 states and 14140 transitions. [2021-01-20 11:59:56,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-20 11:59:56,353 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-20 11:59:56,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:56,363 INFO L225 Difference]: With dead ends: 6160 [2021-01-20 11:59:56,363 INFO L226 Difference]: Without dead ends: 5860 [2021-01-20 11:59:56,364 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2021-01-20 11:59:56,364 INFO L78 Accepts]: Start accepts. Automaton has 5860 states. Word has length 71 [2021-01-20 11:59:56,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:56,364 INFO L481 AbstractCegarLoop]: Abstraction has 5860 states. [2021-01-20 11:59:56,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:56,365 INFO L276 IsEmpty]: Start isEmpty. Operand 5860 states. [2021-01-20 11:59:56,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 11:59:56,373 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:56,373 INFO L504 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] [2021-01-20 11:59:56,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-20 11:59:56,574 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:56,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:56,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1358745818, now seen corresponding path program 25 times [2021-01-20 11:59:56,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:56,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736080147] [2021-01-20 11:59:56,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:56,768 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:56,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736080147] [2021-01-20 11:59:56,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208344921] [2021-01-20 11:59:56,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:59:56,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:56,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:59:56,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:56,872 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:59:56,888 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:56,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:56,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-20 11:59:56,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445695486] [2021-01-20 11:59:56,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 11:59:56,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:56,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 11:59:56,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-01-20 11:59:56,986 INFO L87 Difference]: Start difference. First operand 5860 states. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 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) [2021-01-20 11:59:57,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:57,594 INFO L93 Difference]: Finished difference Result 6260 states and 14340 transitions. [2021-01-20 11:59:57,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-20 11:59:57,594 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 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 71 [2021-01-20 11:59:57,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:57,603 INFO L225 Difference]: With dead ends: 6260 [2021-01-20 11:59:57,603 INFO L226 Difference]: Without dead ends: 5960 [2021-01-20 11:59:57,604 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2021-01-20 11:59:57,604 INFO L78 Accepts]: Start accepts. Automaton has 5960 states. Word has length 71 [2021-01-20 11:59:57,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:57,604 INFO L481 AbstractCegarLoop]: Abstraction has 5960 states. [2021-01-20 11:59:57,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 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) [2021-01-20 11:59:57,604 INFO L276 IsEmpty]: Start isEmpty. Operand 5960 states. [2021-01-20 11:59:57,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 11:59:57,612 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:57,612 INFO L504 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] [2021-01-20 11:59:57,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:59:57,813 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:57,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:57,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1212919112, now seen corresponding path program 26 times [2021-01-20 11:59:57,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:57,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818439180] [2021-01-20 11:59:57,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:57,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:57,998 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:57,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818439180] [2021-01-20 11:59:57,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072426841] [2021-01-20 11:59:57,999 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 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 [2021-01-20 11:59:58,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:59:58,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:59:58,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:59:58,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:58,108 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:58,123 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:58,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:58,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-01-20 11:59:58,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792211701] [2021-01-20 11:59:58,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 11:59:58,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:58,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 11:59:58,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-01-20 11:59:58,126 INFO L87 Difference]: Start difference. First operand 5960 states. Second operand has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:58,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:58,584 INFO L93 Difference]: Finished difference Result 6490 states and 14800 transitions. [2021-01-20 11:59:58,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 11:59:58,587 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-20 11:59:58,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:58,597 INFO L225 Difference]: With dead ends: 6490 [2021-01-20 11:59:58,598 INFO L226 Difference]: Without dead ends: 6190 [2021-01-20 11:59:58,598 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-01-20 11:59:58,598 INFO L78 Accepts]: Start accepts. Automaton has 6190 states. Word has length 71 [2021-01-20 11:59:58,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:58,599 INFO L481 AbstractCegarLoop]: Abstraction has 6190 states. [2021-01-20 11:59:58,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:59:58,599 INFO L276 IsEmpty]: Start isEmpty. Operand 6190 states. [2021-01-20 11:59:58,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 11:59:58,606 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:58,606 INFO L504 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] [2021-01-20 11:59:58,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-20 11:59:58,808 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:58,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:58,809 INFO L82 PathProgramCache]: Analyzing trace with hash -488108568, now seen corresponding path program 27 times [2021-01-20 11:59:58,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:58,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766989645] [2021-01-20 11:59:58,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:59:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:59,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766989645] [2021-01-20 11:59:59,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727980350] [2021-01-20 11:59:59,008 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 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 [2021-01-20 11:59:59,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-20 11:59:59,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:59:59,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 11:59:59,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:59:59,137 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:59:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 11:59:59,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:59:59,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-20 11:59:59,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848841472] [2021-01-20 11:59:59,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 11:59:59,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:59:59,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 11:59:59,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-01-20 11:59:59,156 INFO L87 Difference]: Start difference. First operand 6190 states. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 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) [2021-01-20 11:59:59,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:59:59,751 INFO L93 Difference]: Finished difference Result 6630 states and 15080 transitions. [2021-01-20 11:59:59,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-20 11:59:59,752 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 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 71 [2021-01-20 11:59:59,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:59:59,760 INFO L225 Difference]: With dead ends: 6630 [2021-01-20 11:59:59,760 INFO L226 Difference]: Without dead ends: 6330 [2021-01-20 11:59:59,761 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2021-01-20 11:59:59,761 INFO L78 Accepts]: Start accepts. Automaton has 6330 states. Word has length 71 [2021-01-20 11:59:59,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:59:59,761 INFO L481 AbstractCegarLoop]: Abstraction has 6330 states. [2021-01-20 11:59:59,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 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) [2021-01-20 11:59:59,762 INFO L276 IsEmpty]: Start isEmpty. Operand 6330 states. [2021-01-20 11:59:59,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 11:59:59,769 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:59:59,769 INFO L504 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] [2021-01-20 11:59:59,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:59:59,983 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:59:59,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:59:59,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1203844937, now seen corresponding path program 28 times [2021-01-20 11:59:59,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:59:59,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778015997] [2021-01-20 11:59:59,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:59:59,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 12:00:00,175 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 12:00:00,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778015997] [2021-01-20 12:00:00,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371842080] [2021-01-20 12:00:00,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 12:00:00,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 12:00:00,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 12:00:00,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 12:00:00,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 12:00:00,384 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 12:00:00,400 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 12:00:00,409 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 12:00:00,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 12:00:00,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-20 12:00:00,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415170821] [2021-01-20 12:00:00,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 12:00:00,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 12:00:00,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 12:00:00,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-01-20 12:00:00,411 INFO L87 Difference]: Start difference. First operand 6330 states. 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) [2021-01-20 12:00:01,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 12:00:01,085 INFO L93 Difference]: Finished difference Result 6906 states and 15888 transitions. [2021-01-20 12:00:01,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-20 12:00:01,086 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 71 [2021-01-20 12:00:01,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 12:00:01,094 INFO L225 Difference]: With dead ends: 6906 [2021-01-20 12:00:01,094 INFO L226 Difference]: Without dead ends: 6405 [2021-01-20 12:00:01,094 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=333, Invalid=789, Unknown=0, NotChecked=0, Total=1122 [2021-01-20 12:00:01,094 INFO L78 Accepts]: Start accepts. Automaton has 6405 states. Word has length 71 [2021-01-20 12:00:01,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 12:00:01,095 INFO L481 AbstractCegarLoop]: Abstraction has 6405 states. [2021-01-20 12:00:01,095 INFO L482 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) [2021-01-20 12:00:01,095 INFO L276 IsEmpty]: Start isEmpty. Operand 6405 states. [2021-01-20 12:00:01,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 12:00:01,101 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 12:00:01,101 INFO L504 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] [2021-01-20 12:00:01,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-20 12:00:01,302 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 12:00:01,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 12:00:01,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1682215820, now seen corresponding path program 29 times [2021-01-20 12:00:01,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 12:00:01,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644333237] [2021-01-20 12:00:01,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 12:00:01,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-20 12:00:01,318 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-20 12:00:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-20 12:00:01,332 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-20 12:00:01,381 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-20 12:00:01,381 INFO L605 BasicCegarLoop]: Counterexample might be feasible [2021-01-20 12:00:01,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-01-20 12:00:01,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.01 12:00:01 BasicIcfg [2021-01-20 12:00:01,500 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-20 12:00:01,502 INFO L168 Benchmark]: Toolchain (without parser) took 38143.41 ms. Allocated memory was 302.0 MB in the beginning and 767.6 MB in the end (delta: 465.6 MB). Free memory was 277.2 MB in the beginning and 488.0 MB in the end (delta: -210.8 MB). Peak memory consumption was 257.0 MB. Max. memory is 16.0 GB. [2021-01-20 12:00:01,502 INFO L168 Benchmark]: CDTParser took 0.81 ms. Allocated memory is still 302.0 MB. Free memory is still 272.2 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-01-20 12:00:01,503 INFO L168 Benchmark]: CACSL2BoogieTranslator took 988.36 ms. Allocated memory is still 302.0 MB. Free memory was 277.0 MB in the beginning and 248.3 MB in the end (delta: 28.7 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. [2021-01-20 12:00:01,503 INFO L168 Benchmark]: Boogie Procedure Inliner took 91.35 ms. Allocated memory is still 302.0 MB. Free memory was 248.3 MB in the beginning and 246.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-01-20 12:00:01,503 INFO L168 Benchmark]: Boogie Preprocessor took 56.90 ms. Allocated memory is still 302.0 MB. Free memory was 246.4 MB in the beginning and 245.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-01-20 12:00:01,504 INFO L168 Benchmark]: RCFGBuilder took 583.43 ms. Allocated memory is still 302.0 MB. Free memory was 245.1 MB in the beginning and 266.1 MB in the end (delta: -20.9 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.0 GB. [2021-01-20 12:00:01,504 INFO L168 Benchmark]: TraceAbstraction took 36411.44 ms. Allocated memory was 302.0 MB in the beginning and 767.6 MB in the end (delta: 465.6 MB). Free memory was 266.1 MB in the beginning and 488.0 MB in the end (delta: -221.9 MB). Peak memory consumption was 243.6 MB. Max. memory is 16.0 GB. [2021-01-20 12:00:01,506 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.81 ms. Allocated memory is still 302.0 MB. Free memory is still 272.2 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 988.36 ms. Allocated memory is still 302.0 MB. Free memory was 277.0 MB in the beginning and 248.3 MB in the end (delta: 28.7 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 91.35 ms. Allocated memory is still 302.0 MB. Free memory was 248.3 MB in the beginning and 246.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 56.90 ms. Allocated memory is still 302.0 MB. Free memory was 246.4 MB in the beginning and 245.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 583.43 ms. Allocated memory is still 302.0 MB. Free memory was 245.1 MB in the beginning and 266.1 MB in the end (delta: -20.9 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 36411.44 ms. Allocated memory was 302.0 MB in the beginning and 767.6 MB in the end (delta: 465.6 MB). Free memory was 266.1 MB in the beginning and 488.0 MB in the end (delta: -221.9 MB). Peak memory consumption was 243.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 693]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; VAL [i=3, j=6] [L712] 0 pthread_t id1, id2; VAL [i=3, j=6] [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=0] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L716] 0 int condI = i >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2, k++=1] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2, k++=1] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3, k++=2] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3, k++=2] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4, k++=3] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4, k++=3] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L719] 0 int condJ = j >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L721] COND TRUE 0 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L693] COND FALSE 0 !(0) VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L693] 0 __assert_fail ("0", "triangular-2.c", 8, __extension__ __PRETTY_FUNCTION__) VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 36.1s, OverallIterations: 38, TraceHistogramMax: 5, AutomataDifference: 16.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 3319 SDtfs, 10628 SDslu, 20681 SDs, 0 SdLazy, 3843 SolverSat, 1084 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2645 GetRequests, 1861 SyntacticMatches, 26 SemanticMatches, 758 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3400 ImplicationChecksByTransitivity, 14.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6405occurred in iteration=37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 8.7s InterpolantComputationTime, 4028 NumberOfCodeBlocks, 4028 NumberOfCodeBlocksAsserted, 120 NumberOfCheckSat, 3884 ConstructedInterpolants, 0 QuantifiedInterpolants, 884530 SizeOfPredicates, 287 NumberOfNonLiveVariables, 4440 ConjunctsInSsa, 393 ConjunctsInUnsatCore, 68 InterpolantComputations, 6 PerfectInterpolantSequences, 48/2108 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...