/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-keepdead.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-e5469eb [2021-01-20 17:49:12,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-20 17:49:12,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-20 17:49:12,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-20 17:49:12,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-20 17:49:12,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-20 17:49:12,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-20 17:49:12,535 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-20 17:49:12,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-20 17:49:12,543 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-20 17:49:12,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-20 17:49:12,546 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-20 17:49:12,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-20 17:49:12,549 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-20 17:49:12,551 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-20 17:49:12,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-20 17:49:12,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-20 17:49:12,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-20 17:49:12,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-20 17:49:12,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-20 17:49:12,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-20 17:49:12,576 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-20 17:49:12,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-20 17:49:12,579 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-20 17:49:12,585 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-20 17:49:12,586 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-20 17:49:12,586 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-20 17:49:12,591 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-20 17:49:12,592 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-20 17:49:12,593 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-20 17:49:12,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-20 17:49:12,594 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-20 17:49:12,596 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-20 17:49:12,597 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-20 17:49:12,598 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-20 17:49:12,598 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-20 17:49:12,599 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-20 17:49:12,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-20 17:49:12,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-20 17:49:12,601 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-20 17:49:12,602 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-20 17:49:12,603 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-keepdead.epf [2021-01-20 17:49:12,659 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-20 17:49:12,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-20 17:49:12,664 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-20 17:49:12,665 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-20 17:49:12,665 INFO L138 SettingsManager]: * Use SBE=true [2021-01-20 17:49:12,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-20 17:49:12,665 INFO L138 SettingsManager]: * sizeof long=4 [2021-01-20 17:49:12,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-20 17:49:12,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-01-20 17:49:12,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-20 17:49:12,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-20 17:49:12,668 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-20 17:49:12,668 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-20 17:49:12,668 INFO L138 SettingsManager]: * sizeof long double=12 [2021-01-20 17:49:12,668 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-20 17:49:12,668 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-20 17:49:12,669 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-20 17:49:12,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-20 17:49:12,669 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-20 17:49:12,669 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-01-20 17:49:12,670 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-20 17:49:12,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-20 17:49:12,670 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-20 17:49:12,670 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-20 17:49:12,671 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-20 17:49:12,671 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-20 17:49:12,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-20 17:49:12,671 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-01-20 17:49:12,671 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-20 17:49:12,672 INFO L138 SettingsManager]: * Remove dead ends from automaton=false [2021-01-20 17:49:12,672 INFO L138 SettingsManager]: * Minimization of abstraction=NONE [2021-01-20 17:49:12,672 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-20 17:49:13,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-20 17:49:13,160 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-20 17:49:13,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-20 17:49:13,165 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-20 17:49:13,166 INFO L275 PluginConnector]: CDTParser initialized [2021-01-20 17:49:13,167 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2021-01-20 17:49:13,264 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60d378fe4/01b13d41164f443d8a5c3acb6d1ca3cb/FLAG4cbe27355 [2021-01-20 17:49:14,012 INFO L306 CDTParser]: Found 1 translation units. [2021-01-20 17:49:14,012 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2021-01-20 17:49:14,035 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60d378fe4/01b13d41164f443d8a5c3acb6d1ca3cb/FLAG4cbe27355 [2021-01-20 17:49:14,295 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60d378fe4/01b13d41164f443d8a5c3acb6d1ca3cb [2021-01-20 17:49:14,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-20 17:49:14,302 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-01-20 17:49:14,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-20 17:49:14,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-20 17:49:14,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-20 17:49:14,311 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 05:49:14" (1/1) ... [2021-01-20 17:49:14,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73135c8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:14, skipping insertion in model container [2021-01-20 17:49:14,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 05:49:14" (1/1) ... [2021-01-20 17:49:14,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-20 17:49:14,392 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-20 17:49:14,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-20 17:49:14,725 INFO L203 MainTranslator]: Completed pre-run [2021-01-20 17:49:14,774 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-20 17:49:14,890 INFO L208 MainTranslator]: Completed translation [2021-01-20 17:49:14,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:14 WrapperNode [2021-01-20 17:49:14,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-20 17:49:14,895 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-20 17:49:14,895 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-20 17:49:14,896 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-20 17:49:14,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:14" (1/1) ... [2021-01-20 17:49:14,943 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:14" (1/1) ... [2021-01-20 17:49:14,974 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-20 17:49:14,976 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-20 17:49:14,976 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-20 17:49:14,976 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-20 17:49:14,986 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:14" (1/1) ... [2021-01-20 17:49:14,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:14" (1/1) ... [2021-01-20 17:49:14,990 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:14" (1/1) ... [2021-01-20 17:49:14,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:14" (1/1) ... [2021-01-20 17:49:14,998 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:14" (1/1) ... [2021-01-20 17:49:15,003 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:14" (1/1) ... [2021-01-20 17:49:15,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:14" (1/1) ... [2021-01-20 17:49:15,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-20 17:49:15,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-20 17:49:15,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-20 17:49:15,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-20 17:49:15,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:14" (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 17:49:15,136 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-01-20 17:49:15,137 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-01-20 17:49:15,138 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-01-20 17:49:15,139 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-01-20 17:49:15,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-20 17:49:15,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-01-20 17:49:15,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-20 17:49:15,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-20 17:49:15,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-20 17:49:15,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-01-20 17:49:15,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-20 17:49:15,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-20 17:49:15,144 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 17:49:15,608 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-20 17:49:15,609 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-20 17:49:15,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 05:49:15 BoogieIcfgContainer [2021-01-20 17:49:15,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-20 17:49:15,613 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-20 17:49:15,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-20 17:49:15,617 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-20 17:49:15,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 05:49:14" (1/3) ... [2021-01-20 17:49:15,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cef65dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 05:49:15, skipping insertion in model container [2021-01-20 17:49:15,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:14" (2/3) ... [2021-01-20 17:49:15,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cef65dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 05:49:15, skipping insertion in model container [2021-01-20 17:49:15,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 05:49:15" (3/3) ... [2021-01-20 17:49:15,621 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-2.i [2021-01-20 17:49:15,639 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-01-20 17:49:15,640 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-20 17:49:15,644 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-20 17:49:15,645 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-01-20 17:49:15,677 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,678 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,678 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,678 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,678 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,678 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,679 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,679 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,679 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,679 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,680 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,680 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,680 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,680 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,680 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,681 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,681 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,681 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,681 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,681 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,682 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,682 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,682 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,682 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,683 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,683 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,683 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,683 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,683 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,684 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,684 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,684 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,685 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,685 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,685 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,685 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,685 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,685 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,686 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,686 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,686 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,686 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,687 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,687 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,687 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,687 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,687 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,688 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,688 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,688 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,688 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,689 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,689 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,689 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,689 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,689 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,690 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,690 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,690 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,690 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,692 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,693 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,693 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,693 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,693 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,694 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,702 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,703 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,703 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,703 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,703 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,703 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:15,706 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-01-20 17:49:15,720 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-20 17:49:15,745 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-20 17:49:15,746 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-20 17:49:15,746 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-20 17:49:15,746 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-20 17:49:15,746 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-20 17:49:15,746 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-20 17:49:15,747 INFO L383 AbstractCegarLoop]: Minimize is NONE [2021-01-20 17:49:15,747 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-20 17:49:15,758 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 67 places, 66 transitions, 142 flow [2021-01-20 17:49:15,895 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 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 17:49:15,907 INFO L276 IsEmpty]: Start isEmpty. Operand has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 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 17:49:15,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-20 17:49:15,922 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:15,923 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 17:49:15,923 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:15,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:15,930 INFO L82 PathProgramCache]: Analyzing trace with hash 2143390317, now seen corresponding path program 1 times [2021-01-20 17:49:15,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:15,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931370912] [2021-01-20 17:49:15,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:16,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:16,433 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 17:49:16,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931370912] [2021-01-20 17:49:16,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 17:49:16,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-20 17:49:16,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991395829] [2021-01-20 17:49:16,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-20 17:49:16,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:16,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-20 17:49:16,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-20 17:49:16,472 INFO L87 Difference]: Start difference. First operand has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 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 17:49:16,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:16,714 INFO L93 Difference]: Finished difference Result 4034 states and 11738 transitions. [2021-01-20 17:49:16,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-20 17:49:16,716 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 17:49:16,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:16,719 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-01-20 17:49:16,719 INFO L78 Accepts]: Start accepts. Automaton has 4034 states and 11738 transitions. Word has length 28 [2021-01-20 17:49:16,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:16,721 INFO L481 AbstractCegarLoop]: Abstraction has 4034 states and 11738 transitions. [2021-01-20 17:49:16,721 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 17:49:16,721 INFO L276 IsEmpty]: Start isEmpty. Operand 4034 states and 11738 transitions. [2021-01-20 17:49:16,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-20 17:49:16,733 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:16,733 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] [2021-01-20 17:49:16,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-20 17:49:16,734 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:16,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:16,735 INFO L82 PathProgramCache]: Analyzing trace with hash 409143693, now seen corresponding path program 1 times [2021-01-20 17:49:16,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:16,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567328917] [2021-01-20 17:49:16,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:16,997 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 17:49:16,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567328917] [2021-01-20 17:49:16,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 17:49:16,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 17:49:16,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479105592] [2021-01-20 17:49:17,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 17:49:17,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:17,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 17:49:17,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-20 17:49:17,005 INFO L87 Difference]: Start difference. First operand 4034 states and 11738 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 17:49:17,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:17,235 INFO L93 Difference]: Finished difference Result 5570 states and 16218 transitions. [2021-01-20 17:49:17,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-20 17:49:17,236 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-01-20 17:49:17,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:17,238 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-01-20 17:49:17,239 INFO L78 Accepts]: Start accepts. Automaton has 5570 states and 16218 transitions. Word has length 33 [2021-01-20 17:49:17,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:17,240 INFO L481 AbstractCegarLoop]: Abstraction has 5570 states and 16218 transitions. [2021-01-20 17:49:17,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 17:49:17,240 INFO L276 IsEmpty]: Start isEmpty. Operand 5570 states and 16218 transitions. [2021-01-20 17:49:17,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-20 17:49:17,245 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:17,245 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] [2021-01-20 17:49:17,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-20 17:49:17,246 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:17,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:17,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1822434001, now seen corresponding path program 2 times [2021-01-20 17:49:17,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:17,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331125986] [2021-01-20 17:49:17,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:17,436 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 17:49:17,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331125986] [2021-01-20 17:49:17,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 17:49:17,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 17:49:17,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645394688] [2021-01-20 17:49:17,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 17:49:17,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:17,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 17:49:17,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-01-20 17:49:17,440 INFO L87 Difference]: Start difference. First operand 5570 states and 16218 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 17:49:17,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:17,730 INFO L93 Difference]: Finished difference Result 7106 states and 20698 transitions. [2021-01-20 17:49:17,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-20 17:49:17,731 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-01-20 17:49:17,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:17,732 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-01-20 17:49:17,732 INFO L78 Accepts]: Start accepts. Automaton has 7106 states and 20698 transitions. Word has length 33 [2021-01-20 17:49:17,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:17,733 INFO L481 AbstractCegarLoop]: Abstraction has 7106 states and 20698 transitions. [2021-01-20 17:49:17,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 17:49:17,733 INFO L276 IsEmpty]: Start isEmpty. Operand 7106 states and 20698 transitions. [2021-01-20 17:49:17,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-20 17:49:17,738 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:17,738 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] [2021-01-20 17:49:17,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-20 17:49:17,738 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:17,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:17,739 INFO L82 PathProgramCache]: Analyzing trace with hash 26886563, now seen corresponding path program 1 times [2021-01-20 17:49:17,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:17,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021623669] [2021-01-20 17:49:17,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:17,915 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 17:49:17,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021623669] [2021-01-20 17:49:17,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 17:49:17,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 17:49:17,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624830916] [2021-01-20 17:49:17,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 17:49:17,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:17,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 17:49:17,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-20 17:49:17,919 INFO L87 Difference]: Start difference. First operand 7106 states and 20698 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 17:49:18,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:18,146 INFO L93 Difference]: Finished difference Result 9242 states and 26890 transitions. [2021-01-20 17:49:18,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-20 17:49:18,147 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-01-20 17:49:18,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:18,148 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-01-20 17:49:18,149 INFO L78 Accepts]: Start accepts. Automaton has 9242 states and 26890 transitions. Word has length 33 [2021-01-20 17:49:18,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:18,149 INFO L481 AbstractCegarLoop]: Abstraction has 9242 states and 26890 transitions. [2021-01-20 17:49:18,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 17:49:18,149 INFO L276 IsEmpty]: Start isEmpty. Operand 9242 states and 26890 transitions. [2021-01-20 17:49:18,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 17:49:18,161 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:18,161 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, 1, 1] [2021-01-20 17:49:18,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-20 17:49:18,162 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:18,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:18,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1836185505, now seen corresponding path program 1 times [2021-01-20 17:49:18,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:18,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955469776] [2021-01-20 17:49:18,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:18,360 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 17:49:18,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955469776] [2021-01-20 17:49:18,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 17:49:18,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-20 17:49:18,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254613290] [2021-01-20 17:49:18,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-20 17:49:18,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:18,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-20 17:49:18,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-01-20 17:49:18,367 INFO L87 Difference]: Start difference. First operand 9242 states and 26890 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 17:49:18,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:18,622 INFO L93 Difference]: Finished difference Result 10010 states and 29130 transitions. [2021-01-20 17:49:18,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-20 17:49:18,623 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-01-20 17:49:18,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:18,624 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-01-20 17:49:18,624 INFO L78 Accepts]: Start accepts. Automaton has 10010 states and 29130 transitions. Word has length 38 [2021-01-20 17:49:18,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:18,624 INFO L481 AbstractCegarLoop]: Abstraction has 10010 states and 29130 transitions. [2021-01-20 17:49:18,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 17:49:18,625 INFO L276 IsEmpty]: Start isEmpty. Operand 10010 states and 29130 transitions. [2021-01-20 17:49:18,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 17:49:18,635 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:18,635 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, 1, 1] [2021-01-20 17:49:18,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-20 17:49:18,635 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:18,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:18,636 INFO L82 PathProgramCache]: Analyzing trace with hash 703073151, now seen corresponding path program 2 times [2021-01-20 17:49:18,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:18,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981482740] [2021-01-20 17:49:18,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:18,763 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 17:49:18,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981482740] [2021-01-20 17:49:18,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 17:49:18,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-20 17:49:18,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128986234] [2021-01-20 17:49:18,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-20 17:49:18,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:18,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-20 17:49:18,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-20 17:49:18,765 INFO L87 Difference]: Start difference. First operand 10010 states and 29130 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 17:49:19,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:19,230 INFO L93 Difference]: Finished difference Result 14042 states and 40906 transitions. [2021-01-20 17:49:19,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-20 17:49:19,230 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-01-20 17:49:19,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:19,231 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:49:19,232 INFO L78 Accepts]: Start accepts. Automaton has 14042 states and 40906 transitions. Word has length 38 [2021-01-20 17:49:19,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:19,232 INFO L481 AbstractCegarLoop]: Abstraction has 14042 states and 40906 transitions. [2021-01-20 17:49:19,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 17:49:19,232 INFO L276 IsEmpty]: Start isEmpty. Operand 14042 states and 40906 transitions. [2021-01-20 17:49:19,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 17:49:19,243 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:19,243 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, 1, 1] [2021-01-20 17:49:19,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-20 17:49:19,244 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:19,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:19,244 INFO L82 PathProgramCache]: Analyzing trace with hash -127797699, now seen corresponding path program 3 times [2021-01-20 17:49:19,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:19,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227215750] [2021-01-20 17:49:19,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:19,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:19,372 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 17:49:19,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227215750] [2021-01-20 17:49:19,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 17:49:19,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-20 17:49:19,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948769758] [2021-01-20 17:49:19,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-20 17:49:19,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:19,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-20 17:49:19,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-20 17:49:19,375 INFO L87 Difference]: Start difference. First operand 14042 states and 40906 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 17:49:19,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:19,854 INFO L93 Difference]: Finished difference Result 18178 states and 52922 transitions. [2021-01-20 17:49:19,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-20 17:49:19,855 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-01-20 17:49:19,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:19,856 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:49:19,856 INFO L78 Accepts]: Start accepts. Automaton has 18178 states and 52922 transitions. Word has length 38 [2021-01-20 17:49:19,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:19,856 INFO L481 AbstractCegarLoop]: Abstraction has 18178 states and 52922 transitions. [2021-01-20 17:49:19,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 17:49:19,857 INFO L276 IsEmpty]: Start isEmpty. Operand 18178 states and 52922 transitions. [2021-01-20 17:49:19,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 17:49:19,879 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:19,879 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, 1, 1] [2021-01-20 17:49:19,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-20 17:49:19,879 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:19,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:19,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1809094268, now seen corresponding path program 1 times [2021-01-20 17:49:19,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:19,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694873262] [2021-01-20 17:49:19,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:19,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:20,096 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2021-01-20 17:49:20,138 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 17:49:20,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694873262] [2021-01-20 17:49:20,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968857638] [2021-01-20 17:49:20,139 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 17:49:20,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:20,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 17:49:20,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:20,515 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:20,529 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 17:49:20,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:20,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 17:49:20,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839004796] [2021-01-20 17:49:20,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 17:49:20,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:20,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 17:49:20,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-01-20 17:49:20,532 INFO L87 Difference]: Start difference. First operand 18178 states and 52922 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:20,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:20,938 INFO L93 Difference]: Finished difference Result 21378 states and 62266 transitions. [2021-01-20 17:49:20,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-20 17:49:20,939 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-20 17:49:20,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:20,940 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-01-20 17:49:20,940 INFO L78 Accepts]: Start accepts. Automaton has 21378 states and 62266 transitions. Word has length 43 [2021-01-20 17:49:20,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:20,941 INFO L481 AbstractCegarLoop]: Abstraction has 21378 states and 62266 transitions. [2021-01-20 17:49:20,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:20,941 INFO L276 IsEmpty]: Start isEmpty. Operand 21378 states and 62266 transitions. [2021-01-20 17:49:21,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 17:49:21,021 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:21,021 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, 1, 1] [2021-01-20 17:49:21,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-01-20 17:49:21,236 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:21,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:21,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1432941800, now seen corresponding path program 2 times [2021-01-20 17:49:21,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:21,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746959435] [2021-01-20 17:49:21,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:21,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:21,414 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 17:49:21,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746959435] [2021-01-20 17:49:21,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019790275] [2021-01-20 17:49:21,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:21,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:49:21,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:21,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 17:49:21,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:21,728 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:21,738 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 17:49:21,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:21,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 17:49:21,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245371116] [2021-01-20 17:49:21,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 17:49:21,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:21,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 17:49:21,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-01-20 17:49:21,741 INFO L87 Difference]: Start difference. First operand 21378 states and 62266 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:22,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:22,383 INFO L93 Difference]: Finished difference Result 22210 states and 64698 transitions. [2021-01-20 17:49:22,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 17:49:22,386 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-20 17:49:22,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:22,387 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2021-01-20 17:49:22,387 INFO L78 Accepts]: Start accepts. Automaton has 22210 states and 64698 transitions. Word has length 43 [2021-01-20 17:49:22,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:22,388 INFO L481 AbstractCegarLoop]: Abstraction has 22210 states and 64698 transitions. [2021-01-20 17:49:22,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:22,388 INFO L276 IsEmpty]: Start isEmpty. Operand 22210 states and 64698 transitions. [2021-01-20 17:49:22,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 17:49:22,407 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:22,407 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, 1, 1] [2021-01-20 17:49:22,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:22,621 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:22,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:22,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1083428478, now seen corresponding path program 3 times [2021-01-20 17:49:22,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:22,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120605420] [2021-01-20 17:49:22,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:22,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:22,777 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 17:49:22,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120605420] [2021-01-20 17:49:22,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90700105] [2021-01-20 17:49:22,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:22,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-20 17:49:22,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:22,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 17:49:22,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:22,990 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:23,002 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 17:49:23,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:23,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 17:49:23,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536002857] [2021-01-20 17:49:23,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 17:49:23,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:23,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 17:49:23,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-01-20 17:49:23,005 INFO L87 Difference]: Start difference. First operand 22210 states and 64698 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:23,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:23,577 INFO L93 Difference]: Finished difference Result 25282 states and 73658 transitions. [2021-01-20 17:49:23,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-20 17:49:23,578 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-20 17:49:23,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:23,578 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2021-01-20 17:49:23,579 INFO L78 Accepts]: Start accepts. Automaton has 25282 states and 73658 transitions. Word has length 43 [2021-01-20 17:49:23,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:23,579 INFO L481 AbstractCegarLoop]: Abstraction has 25282 states and 73658 transitions. [2021-01-20 17:49:23,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:23,579 INFO L276 IsEmpty]: Start isEmpty. Operand 25282 states and 73658 transitions. [2021-01-20 17:49:23,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 17:49:23,597 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:23,597 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, 1, 1] [2021-01-20 17:49:23,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-20 17:49:23,807 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:23,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:23,808 INFO L82 PathProgramCache]: Analyzing trace with hash 615590430, now seen corresponding path program 4 times [2021-01-20 17:49:23,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:23,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262319007] [2021-01-20 17:49:23,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:23,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262319007] [2021-01-20 17:49:23,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138438717] [2021-01-20 17:49:23,959 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 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 17:49:24,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 17:49:24,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:24,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:49:24,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:24,115 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:24,162 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:24,214 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 17:49:24,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:24,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-01-20 17:49:24,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905559907] [2021-01-20 17:49:24,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 17:49:24,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:24,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 17:49:24,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-01-20 17:49:24,217 INFO L87 Difference]: Start difference. First operand 25282 states and 73658 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:25,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:25,165 INFO L93 Difference]: Finished difference Result 37506 states and 109306 transitions. [2021-01-20 17:49:25,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-20 17:49:25,166 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-20 17:49:25,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:25,171 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=320, Invalid=870, Unknown=0, NotChecked=0, Total=1190 [2021-01-20 17:49:25,172 INFO L78 Accepts]: Start accepts. Automaton has 37506 states and 109306 transitions. Word has length 43 [2021-01-20 17:49:25,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:25,172 INFO L481 AbstractCegarLoop]: Abstraction has 37506 states and 109306 transitions. [2021-01-20 17:49:25,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:25,173 INFO L276 IsEmpty]: Start isEmpty. Operand 37506 states and 109306 transitions. [2021-01-20 17:49:25,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 17:49:25,185 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:25,185 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, 1, 1] [2021-01-20 17:49:25,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:25,389 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:25,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:25,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1442221188, now seen corresponding path program 5 times [2021-01-20 17:49:25,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:25,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994389910] [2021-01-20 17:49:25,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:25,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:25,572 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 17:49:25,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994389910] [2021-01-20 17:49:25,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626487603] [2021-01-20 17:49:25,573 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 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 17:49:25,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:49:25,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:25,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 17:49:25,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:25,739 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:25,753 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 17:49:25,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:25,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 17:49:25,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015151703] [2021-01-20 17:49:25,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 17:49:25,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:25,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 17:49:25,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-01-20 17:49:25,758 INFO L87 Difference]: Start difference. First operand 37506 states and 109306 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:26,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:26,473 INFO L93 Difference]: Finished difference Result 42930 states and 125114 transitions. [2021-01-20 17:49:26,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-20 17:49:26,473 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-20 17:49:26,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:26,474 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=791, Unknown=0, NotChecked=0, Total=1056 [2021-01-20 17:49:26,474 INFO L78 Accepts]: Start accepts. Automaton has 42930 states and 125114 transitions. Word has length 43 [2021-01-20 17:49:26,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:26,474 INFO L481 AbstractCegarLoop]: Abstraction has 42930 states and 125114 transitions. [2021-01-20 17:49:26,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:26,475 INFO L276 IsEmpty]: Start isEmpty. Operand 42930 states and 125114 transitions. [2021-01-20 17:49:26,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 17:49:26,490 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:26,490 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, 1, 1] [2021-01-20 17:49:26,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-20 17:49:26,691 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:26,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:26,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1439455800, now seen corresponding path program 6 times [2021-01-20 17:49:26,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:26,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869695920] [2021-01-20 17:49:26,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:26,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:26,840 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 17:49:26,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869695920] [2021-01-20 17:49:26,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242169843] [2021-01-20 17:49:26,840 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 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 17:49:26,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-20 17:49:26,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:26,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 17:49:26,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:27,013 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:49:27,050 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:27,078 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 17:49:27,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:27,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-01-20 17:49:27,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146820602] [2021-01-20 17:49:27,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 17:49:27,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:27,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 17:49:27,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-01-20 17:49:27,081 INFO L87 Difference]: Start difference. First operand 42930 states and 125114 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:27,275 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 7 [2021-01-20 17:49:28,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:28,529 INFO L93 Difference]: Finished difference Result 64026 states and 186858 transitions. [2021-01-20 17:49:28,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-20 17:49:28,530 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-20 17:49:28,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:28,531 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=615, Invalid=1935, Unknown=0, NotChecked=0, Total=2550 [2021-01-20 17:49:28,531 INFO L78 Accepts]: Start accepts. Automaton has 64026 states and 186858 transitions. Word has length 43 [2021-01-20 17:49:28,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:28,531 INFO L481 AbstractCegarLoop]: Abstraction has 64026 states and 186858 transitions. [2021-01-20 17:49:28,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:28,532 INFO L276 IsEmpty]: Start isEmpty. Operand 64026 states and 186858 transitions. [2021-01-20 17:49:28,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:28,565 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:28,565 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, 1, 1] [2021-01-20 17:49:28,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:28,767 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:28,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:28,768 INFO L82 PathProgramCache]: Analyzing trace with hash -397305581, now seen corresponding path program 7 times [2021-01-20 17:49:28,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:28,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991750577] [2021-01-20 17:49:28,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:28,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:28,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991750577] [2021-01-20 17:49:28,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559903176] [2021-01-20 17:49:28,932 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 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 17:49:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:28,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:29,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:29,162 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:29,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:29,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:29,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-20 17:49:29,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235839365] [2021-01-20 17:49:29,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 17:49:29,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:29,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 17:49:29,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-01-20 17:49:29,288 INFO L87 Difference]: Start difference. First operand 64026 states and 186858 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:30,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:30,260 INFO L93 Difference]: Finished difference Result 71642 states and 209066 transitions. [2021-01-20 17:49:30,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 17:49:30,261 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 17:49:30,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:30,262 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=381, Invalid=1025, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 17:49:30,262 INFO L78 Accepts]: Start accepts. Automaton has 71642 states and 209066 transitions. Word has length 48 [2021-01-20 17:49:30,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:30,262 INFO L481 AbstractCegarLoop]: Abstraction has 71642 states and 209066 transitions. [2021-01-20 17:49:30,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:30,263 INFO L276 IsEmpty]: Start isEmpty. Operand 71642 states and 209066 transitions. [2021-01-20 17:49:30,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:30,303 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:30,303 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, 1, 1] [2021-01-20 17:49:30,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-20 17:49:30,519 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:30,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:30,520 INFO L82 PathProgramCache]: Analyzing trace with hash 2054932487, now seen corresponding path program 1 times [2021-01-20 17:49:30,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:30,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463637079] [2021-01-20 17:49:30,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:30,768 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 17:49:30,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463637079] [2021-01-20 17:49:30,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929469655] [2021-01-20 17:49:30,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 17:49:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:30,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:30,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:31,005 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:31,016 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 17:49:31,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:31,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-20 17:49:31,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104436820] [2021-01-20 17:49:31,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 17:49:31,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:31,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 17:49:31,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-01-20 17:49:31,023 INFO L87 Difference]: Start difference. First operand 71642 states and 209066 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:31,254 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2021-01-20 17:49:32,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:32,166 INFO L93 Difference]: Finished difference Result 74650 states and 217834 transitions. [2021-01-20 17:49:32,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 17:49:32,166 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 17:49:32,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:32,167 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=400, Invalid=1160, Unknown=0, NotChecked=0, Total=1560 [2021-01-20 17:49:32,167 INFO L78 Accepts]: Start accepts. Automaton has 74650 states and 217834 transitions. Word has length 48 [2021-01-20 17:49:32,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:32,168 INFO L481 AbstractCegarLoop]: Abstraction has 74650 states and 217834 transitions. [2021-01-20 17:49:32,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:32,168 INFO L276 IsEmpty]: Start isEmpty. Operand 74650 states and 217834 transitions. [2021-01-20 17:49:32,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:32,200 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:32,201 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, 1, 1] [2021-01-20 17:49:32,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-20 17:49:32,417 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:32,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:32,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1656816609, now seen corresponding path program 2 times [2021-01-20 17:49:32,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:32,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490981269] [2021-01-20 17:49:32,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:32,542 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 17:49:32,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490981269] [2021-01-20 17:49:32,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676992021] [2021-01-20 17:49:32,543 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 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 17:49:32,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:49:32,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:32,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:32,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:32,743 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:32,775 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 17:49:32,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:32,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-20 17:49:32,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797920274] [2021-01-20 17:49:32,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 17:49:32,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:32,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 17:49:32,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-01-20 17:49:32,779 INFO L87 Difference]: Start difference. First operand 74650 states and 217834 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:33,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:33,790 INFO L93 Difference]: Finished difference Result 77338 states and 225706 transitions. [2021-01-20 17:49:33,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 17:49:33,790 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 17:49:33,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:33,792 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=313, Invalid=947, Unknown=0, NotChecked=0, Total=1260 [2021-01-20 17:49:33,792 INFO L78 Accepts]: Start accepts. Automaton has 77338 states and 225706 transitions. Word has length 48 [2021-01-20 17:49:33,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:33,792 INFO L481 AbstractCegarLoop]: Abstraction has 77338 states and 225706 transitions. [2021-01-20 17:49:33,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:33,792 INFO L276 IsEmpty]: Start isEmpty. Operand 77338 states and 225706 transitions. [2021-01-20 17:49:33,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:33,843 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:33,844 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, 1, 1] [2021-01-20 17:49:34,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-20 17:49:34,046 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:34,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:34,047 INFO L82 PathProgramCache]: Analyzing trace with hash 203636825, now seen corresponding path program 8 times [2021-01-20 17:49:34,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:34,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582004288] [2021-01-20 17:49:34,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:34,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582004288] [2021-01-20 17:49:34,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949187386] [2021-01-20 17:49:34,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:34,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:49:34,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:34,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:34,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:34,377 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:34,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:34,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:34,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-20 17:49:34,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524650054] [2021-01-20 17:49:34,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 17:49:34,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:34,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 17:49:34,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-01-20 17:49:34,415 INFO L87 Difference]: Start difference. First operand 77338 states and 225706 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:35,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:35,609 INFO L93 Difference]: Finished difference Result 84698 states and 247146 transitions. [2021-01-20 17:49:35,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-20 17:49:35,610 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 17:49:35,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:35,611 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=423, Invalid=1137, Unknown=0, NotChecked=0, Total=1560 [2021-01-20 17:49:35,611 INFO L78 Accepts]: Start accepts. Automaton has 84698 states and 247146 transitions. Word has length 48 [2021-01-20 17:49:35,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:35,611 INFO L481 AbstractCegarLoop]: Abstraction has 84698 states and 247146 transitions. [2021-01-20 17:49:35,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:35,612 INFO L276 IsEmpty]: Start isEmpty. Operand 84698 states and 247146 transitions. [2021-01-20 17:49:35,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:35,647 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:35,647 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, 1, 1] [2021-01-20 17:49:35,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-20 17:49:35,849 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:35,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:35,850 INFO L82 PathProgramCache]: Analyzing trace with hash -243091131, now seen corresponding path program 9 times [2021-01-20 17:49:35,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:35,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344334050] [2021-01-20 17:49:35,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:36,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344334050] [2021-01-20 17:49:36,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255729477] [2021-01-20 17:49:36,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:36,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 17:49:36,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:36,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:36,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:36,429 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:36,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:36,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-20 17:49:36,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954453113] [2021-01-20 17:49:36,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 17:49:36,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:36,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 17:49:36,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-01-20 17:49:36,444 INFO L87 Difference]: Start difference. First operand 84698 states and 247146 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:37,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:37,722 INFO L93 Difference]: Finished difference Result 93722 states and 273450 transitions. [2021-01-20 17:49:37,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-20 17:49:37,723 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 17:49:37,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:37,724 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=492, Invalid=1488, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 17:49:37,724 INFO L78 Accepts]: Start accepts. Automaton has 93722 states and 273450 transitions. Word has length 48 [2021-01-20 17:49:37,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:37,724 INFO L481 AbstractCegarLoop]: Abstraction has 93722 states and 273450 transitions. [2021-01-20 17:49:37,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:37,725 INFO L276 IsEmpty]: Start isEmpty. Operand 93722 states and 273450 transitions. [2021-01-20 17:49:37,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:37,750 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:37,750 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, 1, 1] [2021-01-20 17:49:37,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-20 17:49:37,956 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:37,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:37,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1170199177, now seen corresponding path program 10 times [2021-01-20 17:49:37,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:37,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047406946] [2021-01-20 17:49:37,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:38,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:38,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047406946] [2021-01-20 17:49:38,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059087568] [2021-01-20 17:49:38,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:38,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 17:49:38,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:38,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:38,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:38,277 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:49:38,289 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:38,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:38,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:38,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 17:49:38,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519220595] [2021-01-20 17:49:38,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 17:49:38,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:38,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 17:49:38,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-01-20 17:49:38,302 INFO L87 Difference]: Start difference. First operand 93722 states and 273450 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:39,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:39,858 INFO L93 Difference]: Finished difference Result 115802 states and 337898 transitions. [2021-01-20 17:49:39,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-20 17:49:39,859 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 17:49:39,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:39,860 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=667, Invalid=1883, Unknown=0, NotChecked=0, Total=2550 [2021-01-20 17:49:39,860 INFO L78 Accepts]: Start accepts. Automaton has 115802 states and 337898 transitions. Word has length 48 [2021-01-20 17:49:39,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:39,861 INFO L481 AbstractCegarLoop]: Abstraction has 115802 states and 337898 transitions. [2021-01-20 17:49:39,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:39,861 INFO L276 IsEmpty]: Start isEmpty. Operand 115802 states and 337898 transitions. [2021-01-20 17:49:40,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:40,164 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:40,164 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, 1, 1] [2021-01-20 17:49:40,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:40,380 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:40,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:40,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1533122351, now seen corresponding path program 3 times [2021-01-20 17:49:40,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:40,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217510007] [2021-01-20 17:49:40,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:40,505 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 17:49:40,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217510007] [2021-01-20 17:49:40,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111985329] [2021-01-20 17:49:40,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:40,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 17:49:40,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:40,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:40,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:40,704 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:40,716 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 17:49:40,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:40,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-20 17:49:40,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96894539] [2021-01-20 17:49:40,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 17:49:40,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:40,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 17:49:40,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-01-20 17:49:40,718 INFO L87 Difference]: Start difference. First operand 115802 states and 337898 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:42,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:42,478 INFO L93 Difference]: Finished difference Result 124378 states and 362922 transitions. [2021-01-20 17:49:42,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-20 17:49:42,479 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 17:49:42,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:42,480 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=536, Invalid=1720, Unknown=0, NotChecked=0, Total=2256 [2021-01-20 17:49:42,480 INFO L78 Accepts]: Start accepts. Automaton has 124378 states and 362922 transitions. Word has length 48 [2021-01-20 17:49:42,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:42,480 INFO L481 AbstractCegarLoop]: Abstraction has 124378 states and 362922 transitions. [2021-01-20 17:49:42,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:42,480 INFO L276 IsEmpty]: Start isEmpty. Operand 124378 states and 362922 transitions. [2021-01-20 17:49:42,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:42,507 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:42,507 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, 1, 1] [2021-01-20 17:49:42,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-01-20 17:49:42,708 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:42,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:42,709 INFO L82 PathProgramCache]: Analyzing trace with hash -119832043, now seen corresponding path program 4 times [2021-01-20 17:49:42,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:42,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318775900] [2021-01-20 17:49:42,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:42,830 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 17:49:42,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318775900] [2021-01-20 17:49:42,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239895071] [2021-01-20 17:49:42,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:42,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 17:49:42,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:42,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:42,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:42,987 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:49:43,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:43,019 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 17:49:43,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:43,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-20 17:49:43,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598184877] [2021-01-20 17:49:43,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 17:49:43,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:43,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 17:49:43,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-01-20 17:49:43,022 INFO L87 Difference]: Start difference. First operand 124378 states and 362922 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:45,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:45,253 INFO L93 Difference]: Finished difference Result 155874 states and 454866 transitions. [2021-01-20 17:49:45,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-01-20 17:49:45,253 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 17:49:45,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:45,255 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1048, Invalid=3374, Unknown=0, NotChecked=0, Total=4422 [2021-01-20 17:49:45,255 INFO L78 Accepts]: Start accepts. Automaton has 155874 states and 454866 transitions. Word has length 48 [2021-01-20 17:49:45,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:45,255 INFO L481 AbstractCegarLoop]: Abstraction has 155874 states and 454866 transitions. [2021-01-20 17:49:45,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:45,255 INFO L276 IsEmpty]: Start isEmpty. Operand 155874 states and 454866 transitions. [2021-01-20 17:49:45,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:49:45,725 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:45,725 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, 1, 1] [2021-01-20 17:49:45,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:45,942 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:45,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:45,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1755085526, now seen corresponding path program 5 times [2021-01-20 17:49:45,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:45,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223748258] [2021-01-20 17:49:45,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:46,081 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 17:49:46,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223748258] [2021-01-20 17:49:46,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86993605] [2021-01-20 17:49:46,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:46,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 17:49:46,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:46,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:49:46,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:46,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:46,337 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:46,348 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:46,394 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 17:49:46,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:46,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:49:46,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753978360] [2021-01-20 17:49:46,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:49:46,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:46,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:49:46,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:49:46,396 INFO L87 Difference]: Start difference. First operand 155874 states and 454866 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:47,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:47,908 INFO L93 Difference]: Finished difference Result 159266 states and 464786 transitions. [2021-01-20 17:49:47,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 17:49:47,909 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:49:47,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:47,910 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2021-01-20 17:49:47,910 INFO L78 Accepts]: Start accepts. Automaton has 159266 states and 464786 transitions. Word has length 53 [2021-01-20 17:49:47,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:47,911 INFO L481 AbstractCegarLoop]: Abstraction has 159266 states and 464786 transitions. [2021-01-20 17:49:47,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:47,911 INFO L276 IsEmpty]: Start isEmpty. Operand 159266 states and 464786 transitions. [2021-01-20 17:49:47,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:49:47,999 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:47,999 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, 1, 1] [2021-01-20 17:49:48,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-20 17:49:48,201 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:48,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:48,202 INFO L82 PathProgramCache]: Analyzing trace with hash 144817900, now seen corresponding path program 6 times [2021-01-20 17:49:48,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:48,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755123203] [2021-01-20 17:49:48,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:48,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:48,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755123203] [2021-01-20 17:49:48,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054181474] [2021-01-20 17:49:48,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:48,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 17:49:48,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:48,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:49:48,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:48,593 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:48,634 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 17:49:48,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:48,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:49:48,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488625039] [2021-01-20 17:49:48,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:49:48,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:48,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:49:48,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:49:48,639 INFO L87 Difference]: Start difference. First operand 159266 states and 464786 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:50,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:50,527 INFO L93 Difference]: Finished difference Result 162594 states and 474578 transitions. [2021-01-20 17:49:50,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-20 17:49:50,528 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:49:50,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:50,529 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 17:49:50,529 INFO L78 Accepts]: Start accepts. Automaton has 162594 states and 474578 transitions. Word has length 53 [2021-01-20 17:49:50,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:50,529 INFO L481 AbstractCegarLoop]: Abstraction has 162594 states and 474578 transitions. [2021-01-20 17:49:50,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:50,530 INFO L276 IsEmpty]: Start isEmpty. Operand 162594 states and 474578 transitions. [2021-01-20 17:49:50,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:49:50,595 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:50,595 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, 1, 1] [2021-01-20 17:49:50,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:50,796 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:50,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:50,796 INFO L82 PathProgramCache]: Analyzing trace with hash -253297978, now seen corresponding path program 7 times [2021-01-20 17:49:50,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:50,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997677416] [2021-01-20 17:49:50,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:50,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:50,939 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 17:49:50,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997677416] [2021-01-20 17:49:50,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609718658] [2021-01-20 17:49:50,940 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:50,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:50,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:49:50,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:51,151 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:51,179 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 17:49:51,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:51,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:49:51,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312037931] [2021-01-20 17:49:51,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:49:51,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:51,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:49:51,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:49:51,182 INFO L87 Difference]: Start difference. First operand 162594 states and 474578 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:52,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:52,784 INFO L93 Difference]: Finished difference Result 165858 states and 484114 transitions. [2021-01-20 17:49:52,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 17:49:52,785 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:49:52,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:52,786 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=459, Invalid=1347, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 17:49:52,786 INFO L78 Accepts]: Start accepts. Automaton has 165858 states and 484114 transitions. Word has length 53 [2021-01-20 17:49:52,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:52,786 INFO L481 AbstractCegarLoop]: Abstraction has 165858 states and 484114 transitions. [2021-01-20 17:49:52,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:52,786 INFO L276 IsEmpty]: Start isEmpty. Operand 165858 states and 484114 transitions. [2021-01-20 17:49:52,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:49:52,848 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:52,848 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, 1, 1] [2021-01-20 17:49:53,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-20 17:49:53,056 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:53,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:53,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1610795128, now seen corresponding path program 8 times [2021-01-20 17:49:53,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:53,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926320595] [2021-01-20 17:49:53,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:53,187 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 17:49:53,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926320595] [2021-01-20 17:49:53,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513109739] [2021-01-20 17:49:53,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:53,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:49:53,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:53,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:49:53,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:53,939 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:53,963 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 17:49:53,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:53,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:49:53,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262793869] [2021-01-20 17:49:53,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:49:53,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:53,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:49:53,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:49:53,965 INFO L87 Difference]: Start difference. First operand 165858 states and 484114 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:55,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:55,788 INFO L93 Difference]: Finished difference Result 167522 states and 488978 transitions. [2021-01-20 17:49:55,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 17:49:55,788 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:49:55,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:55,790 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=566, Invalid=1690, Unknown=0, NotChecked=0, Total=2256 [2021-01-20 17:49:55,790 INFO L78 Accepts]: Start accepts. Automaton has 167522 states and 488978 transitions. Word has length 53 [2021-01-20 17:49:55,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:55,790 INFO L481 AbstractCegarLoop]: Abstraction has 167522 states and 488978 transitions. [2021-01-20 17:49:55,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:55,791 INFO L276 IsEmpty]: Start isEmpty. Operand 167522 states and 488978 transitions. [2021-01-20 17:49:55,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:49:55,872 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:55,872 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, 1, 1] [2021-01-20 17:49:56,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-20 17:49:56,073 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:56,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:56,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1985432118, now seen corresponding path program 9 times [2021-01-20 17:49:56,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:56,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8040723] [2021-01-20 17:49:56,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:56,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:56,227 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 17:49:56,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8040723] [2021-01-20 17:49:56,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546966941] [2021-01-20 17:49:56,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:56,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 17:49:56,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:56,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:49:56,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:56,484 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:56,517 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 17:49:56,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:56,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:49:56,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050908420] [2021-01-20 17:49:56,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:49:56,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:56,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:49:56,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:49:56,521 INFO L87 Difference]: Start difference. First operand 167522 states and 488978 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:58,504 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-01-20 17:49:58,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:58,710 INFO L93 Difference]: Finished difference Result 170210 states and 496850 transitions. [2021-01-20 17:49:58,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-20 17:49:58,710 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:49:58,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:58,712 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=651, Invalid=1899, Unknown=0, NotChecked=0, Total=2550 [2021-01-20 17:49:58,712 INFO L78 Accepts]: Start accepts. Automaton has 170210 states and 496850 transitions. Word has length 53 [2021-01-20 17:49:58,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:58,713 INFO L481 AbstractCegarLoop]: Abstraction has 170210 states and 496850 transitions. [2021-01-20 17:49:58,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:58,713 INFO L276 IsEmpty]: Start isEmpty. Operand 170210 states and 496850 transitions. [2021-01-20 17:49:58,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:49:58,768 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:58,768 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, 1, 1] [2021-01-20 17:49:58,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-20 17:49:58,969 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:58,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:58,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1474228438, now seen corresponding path program 10 times [2021-01-20 17:49:58,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:58,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509095456] [2021-01-20 17:49:58,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:59,102 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 17:49:59,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509095456] [2021-01-20 17:49:59,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530160443] [2021-01-20 17:49:59,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:59,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 17:49:59,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:59,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:49:59,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:59,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:59,343 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:59,347 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:59,395 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 17:49:59,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:59,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:49:59,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087957292] [2021-01-20 17:49:59,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:49:59,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:59,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:49:59,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:49:59,398 INFO L87 Difference]: Start difference. First operand 170210 states and 496850 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:50:01,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:01,335 INFO L93 Difference]: Finished difference Result 171170 states and 499666 transitions. [2021-01-20 17:50:01,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 17:50:01,336 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:50:01,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:01,337 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=528, Invalid=1634, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 17:50:01,337 INFO L78 Accepts]: Start accepts. Automaton has 171170 states and 499666 transitions. Word has length 53 [2021-01-20 17:50:01,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:01,337 INFO L481 AbstractCegarLoop]: Abstraction has 171170 states and 499666 transitions. [2021-01-20 17:50:01,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:50:01,337 INFO L276 IsEmpty]: Start isEmpty. Operand 171170 states and 499666 transitions. [2021-01-20 17:50:01,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:01,405 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:01,405 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, 1, 1] [2021-01-20 17:50:01,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-20 17:50:01,606 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:01,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:01,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1882091344, now seen corresponding path program 11 times [2021-01-20 17:50:01,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:01,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571069904] [2021-01-20 17:50:01,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:01,767 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 17:50:01,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571069904] [2021-01-20 17:50:01,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322107412] [2021-01-20 17:50:01,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:01,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 17:50:01,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:01,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:01,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:01,983 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:01,986 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:01,988 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:02,032 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 17:50:02,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:02,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:50:02,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446725819] [2021-01-20 17:50:02,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:50:02,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:02,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:50:02,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:50:02,034 INFO L87 Difference]: Start difference. First operand 171170 states and 499666 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:50:03,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:03,834 INFO L93 Difference]: Finished difference Result 174370 states and 509010 transitions. [2021-01-20 17:50:03,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 17:50:03,835 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:50:03,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:03,836 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=503, Invalid=1389, Unknown=0, NotChecked=0, Total=1892 [2021-01-20 17:50:03,836 INFO L78 Accepts]: Start accepts. Automaton has 174370 states and 509010 transitions. Word has length 53 [2021-01-20 17:50:03,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:03,836 INFO L481 AbstractCegarLoop]: Abstraction has 174370 states and 509010 transitions. [2021-01-20 17:50:03,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:50:03,837 INFO L276 IsEmpty]: Start isEmpty. Operand 174370 states and 509010 transitions. [2021-01-20 17:50:03,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:03,903 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:03,903 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, 1, 1] [2021-01-20 17:50:04,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-20 17:50:04,105 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:04,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:04,105 INFO L82 PathProgramCache]: Analyzing trace with hash 271823718, now seen corresponding path program 12 times [2021-01-20 17:50:04,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:04,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142543036] [2021-01-20 17:50:04,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:04,236 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 17:50:04,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142543036] [2021-01-20 17:50:04,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695937483] [2021-01-20 17:50:04,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:04,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 17:50:04,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:04,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:04,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:04,436 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:04,447 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 17:50:04,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:04,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:50:04,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521312818] [2021-01-20 17:50:04,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:50:04,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:04,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:50:04,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:50:04,450 INFO L87 Difference]: Start difference. First operand 174370 states and 509010 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:50:05,753 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2021-01-20 17:50:06,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:06,559 INFO L93 Difference]: Finished difference Result 177378 states and 517842 transitions. [2021-01-20 17:50:06,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-20 17:50:06,559 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:50:06,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:06,561 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=663, Invalid=1887, Unknown=0, NotChecked=0, Total=2550 [2021-01-20 17:50:06,561 INFO L78 Accepts]: Start accepts. Automaton has 177378 states and 517842 transitions. Word has length 53 [2021-01-20 17:50:06,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:06,561 INFO L481 AbstractCegarLoop]: Abstraction has 177378 states and 517842 transitions. [2021-01-20 17:50:06,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:50:06,562 INFO L276 IsEmpty]: Start isEmpty. Operand 177378 states and 517842 transitions. [2021-01-20 17:50:06,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:06,648 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:06,648 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, 1, 1] [2021-01-20 17:50:06,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:06,849 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:06,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:06,850 INFO L82 PathProgramCache]: Analyzing trace with hash -126292160, now seen corresponding path program 13 times [2021-01-20 17:50:06,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:06,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40818020] [2021-01-20 17:50:06,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:06,981 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 17:50:06,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40818020] [2021-01-20 17:50:06,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757108305] [2021-01-20 17:50:06,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:07,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:07,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:07,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:07,224 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:07,257 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 17:50:07,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:07,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:50:07,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796826698] [2021-01-20 17:50:07,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:50:07,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:07,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:50:07,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:50:07,260 INFO L87 Difference]: Start difference. First operand 177378 states and 517842 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:50:08,425 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-01-20 17:50:09,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:09,221 INFO L93 Difference]: Finished difference Result 180386 states and 526610 transitions. [2021-01-20 17:50:09,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-20 17:50:09,221 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:50:09,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:09,223 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=541, Invalid=1621, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 17:50:09,223 INFO L78 Accepts]: Start accepts. Automaton has 180386 states and 526610 transitions. Word has length 53 [2021-01-20 17:50:09,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:09,223 INFO L481 AbstractCegarLoop]: Abstraction has 180386 states and 526610 transitions. [2021-01-20 17:50:09,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:50:09,223 INFO L276 IsEmpty]: Start isEmpty. Operand 180386 states and 526610 transitions. [2021-01-20 17:50:09,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:09,296 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:09,296 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, 1, 1] [2021-01-20 17:50:09,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:09,505 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:09,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:09,505 INFO L82 PathProgramCache]: Analyzing trace with hash 416206614, now seen corresponding path program 14 times [2021-01-20 17:50:09,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:09,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42908765] [2021-01-20 17:50:09,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:09,633 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 17:50:09,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42908765] [2021-01-20 17:50:09,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881870748] [2021-01-20 17:50:09,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:09,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:50:09,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:09,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:09,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:09,858 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:09,862 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:09,864 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:09,911 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 17:50:09,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:09,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:50:09,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459487133] [2021-01-20 17:50:09,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:50:09,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:09,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:50:09,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:50:09,913 INFO L87 Difference]: Start difference. First operand 180386 states and 526610 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:50:11,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:11,842 INFO L93 Difference]: Finished difference Result 191650 states and 559378 transitions. [2021-01-20 17:50:11,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 17:50:11,843 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:50:11,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:11,844 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=521, Invalid=1459, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 17:50:11,844 INFO L78 Accepts]: Start accepts. Automaton has 191650 states and 559378 transitions. Word has length 53 [2021-01-20 17:50:11,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:11,844 INFO L481 AbstractCegarLoop]: Abstraction has 191650 states and 559378 transitions. [2021-01-20 17:50:11,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:50:11,844 INFO L276 IsEmpty]: Start isEmpty. Operand 191650 states and 559378 transitions. [2021-01-20 17:50:11,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:11,912 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:11,912 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, 1, 1] [2021-01-20 17:50:12,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:12,119 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:12,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:12,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1296111798, now seen corresponding path program 15 times [2021-01-20 17:50:12,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:12,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798692743] [2021-01-20 17:50:12,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:12,251 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 17:50:12,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798692743] [2021-01-20 17:50:12,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717986706] [2021-01-20 17:50:12,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:50:12,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 17:50:12,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:12,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:12,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:12,455 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:50:13,142 WARN L193 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-01-20 17:50:13,237 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:13,297 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 17:50:13,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:13,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:50:13,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631410785] [2021-01-20 17:50:13,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:50:13,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:13,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:50:13,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:50:13,299 INFO L87 Difference]: Start difference. First operand 191650 states and 559378 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:50:16,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:16,163 INFO L93 Difference]: Finished difference Result 217714 states and 635482 transitions. [2021-01-20 17:50:16,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-20 17:50:16,164 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:50:16,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:16,166 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=730, Invalid=2240, Unknown=0, NotChecked=0, Total=2970 [2021-01-20 17:50:16,166 INFO L78 Accepts]: Start accepts. Automaton has 217714 states and 635482 transitions. Word has length 53 [2021-01-20 17:50:16,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:16,166 INFO L481 AbstractCegarLoop]: Abstraction has 217714 states and 635482 transitions. [2021-01-20 17:50:16,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:50:16,167 INFO L276 IsEmpty]: Start isEmpty. Operand 217714 states and 635482 transitions. [2021-01-20 17:50:16,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:16,256 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:16,256 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, 1, 1] [2021-01-20 17:50:16,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-01-20 17:50:16,457 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:16,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:16,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1088090960, now seen corresponding path program 16 times [2021-01-20 17:50:16,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:16,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392501006] [2021-01-20 17:50:16,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:16,600 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 17:50:16,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392501006] [2021-01-20 17:50:16,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774713510] [2021-01-20 17:50:16,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:16,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 17:50:16,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:16,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 17:50:16,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:16,825 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:16,858 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 17:50:16,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:16,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:50:16,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739100151] [2021-01-20 17:50:16,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:50:16,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:16,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:50:16,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:50:16,861 INFO L87 Difference]: Start difference. First operand 217714 states and 635482 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:50:19,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:19,577 INFO L93 Difference]: Finished difference Result 232114 states and 677530 transitions. [2021-01-20 17:50:19,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-20 17:50:19,577 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:50:19,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:19,579 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=707, Invalid=2263, Unknown=0, NotChecked=0, Total=2970 [2021-01-20 17:50:19,579 INFO L78 Accepts]: Start accepts. Automaton has 232114 states and 677530 transitions. Word has length 53 [2021-01-20 17:50:19,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:19,579 INFO L481 AbstractCegarLoop]: Abstraction has 232114 states and 677530 transitions. [2021-01-20 17:50:19,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:50:19,580 INFO L276 IsEmpty]: Start isEmpty. Operand 232114 states and 677530 transitions. [2021-01-20 17:50:19,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:19,641 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:19,641 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, 1, 1] [2021-01-20 17:50:19,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:19,842 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:19,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:19,842 INFO L82 PathProgramCache]: Analyzing trace with hash 325199348, now seen corresponding path program 17 times [2021-01-20 17:50:19,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:19,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739610009] [2021-01-20 17:50:19,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:19,989 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 17:50:19,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739610009] [2021-01-20 17:50:19,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802607987] [2021-01-20 17:50:19,989 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:20,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 17:50:20,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:20,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:20,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:20,158 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:50:20,178 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:20,187 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 17:50:20,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:20,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:50:20,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021058576] [2021-01-20 17:50:20,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:50:20,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:20,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:50:20,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:50:20,189 INFO L87 Difference]: Start difference. First operand 232114 states and 677530 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:50:22,262 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 8 [2021-01-20 17:50:23,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:23,514 INFO L93 Difference]: Finished difference Result 269362 states and 786394 transitions. [2021-01-20 17:50:23,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-01-20 17:50:23,514 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:50:23,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:23,516 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1955 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1271, Invalid=4131, Unknown=0, NotChecked=0, Total=5402 [2021-01-20 17:50:23,516 INFO L78 Accepts]: Start accepts. Automaton has 269362 states and 786394 transitions. Word has length 53 [2021-01-20 17:50:23,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:23,517 INFO L481 AbstractCegarLoop]: Abstraction has 269362 states and 786394 transitions. [2021-01-20 17:50:23,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:50:23,517 INFO L276 IsEmpty]: Start isEmpty. Operand 269362 states and 786394 transitions. [2021-01-20 17:50:23,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:23,591 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:23,592 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, 1, 1] [2021-01-20 17:50:23,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-20 17:50:23,793 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:23,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:23,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1407530148, now seen corresponding path program 18 times [2021-01-20 17:50:23,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:23,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311701121] [2021-01-20 17:50:23,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:24,564 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-01-20 17:50:24,572 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 17:50:24,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311701121] [2021-01-20 17:50:24,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7449622] [2021-01-20 17:50:24,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:24,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 17:50:24,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:24,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 17:50:24,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:24,836 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:24,847 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 17:50:24,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:24,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-01-20 17:50:24,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432487627] [2021-01-20 17:50:24,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 17:50:24,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:24,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 17:50:24,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-01-20 17:50:24,849 INFO L87 Difference]: Start difference. First operand 269362 states and 786394 transitions. Second operand has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:50:27,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:27,676 INFO L93 Difference]: Finished difference Result 272530 states and 795666 transitions. [2021-01-20 17:50:27,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-20 17:50:27,681 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:50:27,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:27,682 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=623, Invalid=2347, Unknown=0, NotChecked=0, Total=2970 [2021-01-20 17:50:27,682 INFO L78 Accepts]: Start accepts. Automaton has 272530 states and 795666 transitions. Word has length 53 [2021-01-20 17:50:27,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:27,682 INFO L481 AbstractCegarLoop]: Abstraction has 272530 states and 795666 transitions. [2021-01-20 17:50:27,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:50:27,683 INFO L276 IsEmpty]: Start isEmpty. Operand 272530 states and 795666 transitions. [2021-01-20 17:50:27,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:27,807 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:27,808 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, 1, 1] [2021-01-20 17:50:28,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:28,023 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:28,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:28,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1474146840, now seen corresponding path program 19 times [2021-01-20 17:50:28,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:28,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278640797] [2021-01-20 17:50:28,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:28,185 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 17:50:28,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278640797] [2021-01-20 17:50:28,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303650960] [2021-01-20 17:50:28,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:28,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:28,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:28,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:28,388 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:50:28,437 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:28,476 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 17:50:28,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:28,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:50:28,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920134831] [2021-01-20 17:50:28,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:50:28,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:28,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:50:28,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:50:28,480 INFO L87 Difference]: Start difference. First operand 272530 states and 795666 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:50:32,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:32,275 INFO L93 Difference]: Finished difference Result 302970 states and 884418 transitions. [2021-01-20 17:50:32,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-01-20 17:50:32,275 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:50:32,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:32,276 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2241 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1379, Invalid=4627, Unknown=0, NotChecked=0, Total=6006 [2021-01-20 17:50:32,276 INFO L78 Accepts]: Start accepts. Automaton has 302970 states and 884418 transitions. Word has length 53 [2021-01-20 17:50:32,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:32,277 INFO L481 AbstractCegarLoop]: Abstraction has 302970 states and 884418 transitions. [2021-01-20 17:50:32,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:50:32,277 INFO L276 IsEmpty]: Start isEmpty. Operand 302970 states and 884418 transitions. [2021-01-20 17:50:32,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:32,349 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:32,349 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, 1, 1] [2021-01-20 17:50:32,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-20 17:50:32,550 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:32,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:32,551 INFO L82 PathProgramCache]: Analyzing trace with hash 973842700, now seen corresponding path program 20 times [2021-01-20 17:50:32,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:32,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841847104] [2021-01-20 17:50:32,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:32,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:33,666 WARN L193 SmtUtils]: Spent 989.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 7 [2021-01-20 17:50:33,685 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 17:50:33,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841847104] [2021-01-20 17:50:33,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785479925] [2021-01-20 17:50:33,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:33,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:50:33,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:33,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:33,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:33,925 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:33,960 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 17:50:33,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:33,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:50:33,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935184391] [2021-01-20 17:50:33,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:50:33,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:33,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:50:33,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:50:33,964 INFO L87 Difference]: Start difference. First operand 302970 states and 884418 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:50:37,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:37,298 INFO L93 Difference]: Finished difference Result 316538 states and 923906 transitions. [2021-01-20 17:50:37,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-20 17:50:37,298 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:50:37,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:37,299 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1007, Invalid=3415, Unknown=0, NotChecked=0, Total=4422 [2021-01-20 17:50:37,299 INFO L78 Accepts]: Start accepts. Automaton has 316538 states and 923906 transitions. Word has length 53 [2021-01-20 17:50:37,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:37,299 INFO L481 AbstractCegarLoop]: Abstraction has 316538 states and 923906 transitions. [2021-01-20 17:50:37,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:50:37,300 INFO L276 IsEmpty]: Start isEmpty. Operand 316538 states and 923906 transitions. [2021-01-20 17:50:37,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:37,360 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:37,360 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, 1, 1] [2021-01-20 17:50:37,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:37,561 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:37,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:37,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1593635218, now seen corresponding path program 21 times [2021-01-20 17:50:37,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:37,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267576843] [2021-01-20 17:50:37,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:37,706 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 17:50:37,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267576843] [2021-01-20 17:50:37,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447684572] [2021-01-20 17:50:37,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:37,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 17:50:37,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:37,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:37,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:37,941 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:37,970 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 17:50:37,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:37,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:50:37,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339992354] [2021-01-20 17:50:37,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:50:37,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:37,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:50:37,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:50:37,972 INFO L87 Difference]: Start difference. First operand 316538 states and 923906 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:50:41,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:41,493 INFO L93 Difference]: Finished difference Result 320122 states and 934402 transitions. [2021-01-20 17:50:41,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-20 17:50:41,493 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:50:41,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:41,494 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1447 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=999, Invalid=3291, Unknown=0, NotChecked=0, Total=4290 [2021-01-20 17:50:41,494 INFO L78 Accepts]: Start accepts. Automaton has 320122 states and 934402 transitions. Word has length 53 [2021-01-20 17:50:41,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:41,495 INFO L481 AbstractCegarLoop]: Abstraction has 320122 states and 934402 transitions. [2021-01-20 17:50:41,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:50:41,495 INFO L276 IsEmpty]: Start isEmpty. Operand 320122 states and 934402 transitions. [2021-01-20 17:50:42,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:42,443 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:42,443 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, 1, 1] [2021-01-20 17:50:42,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-20 17:50:42,658 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:42,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:42,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1288041770, now seen corresponding path program 22 times [2021-01-20 17:50:42,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:42,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405286154] [2021-01-20 17:50:42,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:42,825 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 17:50:42,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405286154] [2021-01-20 17:50:42,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249803976] [2021-01-20 17:50:42,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:42,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 17:50:42,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:42,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 17:50:42,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:43,012 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:50:43,101 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:43,130 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 17:50:43,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:43,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:50:43,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685069117] [2021-01-20 17:50:43,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:50:43,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:43,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:50:43,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:50:43,132 INFO L87 Difference]: Start difference. First operand 320122 states and 934402 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:50:47,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:47,834 INFO L93 Difference]: Finished difference Result 371514 states and 1084994 transitions. [2021-01-20 17:50:47,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-01-20 17:50:47,835 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:50:47,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:47,836 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2576 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1614, Invalid=5192, Unknown=0, NotChecked=0, Total=6806 [2021-01-20 17:50:47,836 INFO L78 Accepts]: Start accepts. Automaton has 371514 states and 1084994 transitions. Word has length 53 [2021-01-20 17:50:47,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:47,836 INFO L481 AbstractCegarLoop]: Abstraction has 371514 states and 1084994 transitions. [2021-01-20 17:50:47,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:50:47,836 INFO L276 IsEmpty]: Start isEmpty. Operand 371514 states and 1084994 transitions. [2021-01-20 17:50:48,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 17:50:48,857 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:48,858 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, 1, 1] [2021-01-20 17:50:49,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-20 17:50:49,058 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:49,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:49,059 INFO L82 PathProgramCache]: Analyzing trace with hash 948308753, now seen corresponding path program 23 times [2021-01-20 17:50:49,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:49,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336837683] [2021-01-20 17:50:49,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:49,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:49,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336837683] [2021-01-20 17:50:49,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777268099] [2021-01-20 17:50:49,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:49,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 17:50:49,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:49,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 17:50:49,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:49,505 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:49,507 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:49,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:49,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:49,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 17:50:49,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955620774] [2021-01-20 17:50:49,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 17:50:49,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:49,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 17:50:49,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-01-20 17:50:49,560 INFO L87 Difference]: Start difference. First operand 371514 states and 1084994 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:50:52,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:52,317 INFO L93 Difference]: Finished difference Result 372474 states and 1087810 transitions. [2021-01-20 17:50:52,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 17:50:52,318 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 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 58 [2021-01-20 17:50:52,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:52,318 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=514, Invalid=1378, Unknown=0, NotChecked=0, Total=1892 [2021-01-20 17:50:52,318 INFO L78 Accepts]: Start accepts. Automaton has 372474 states and 1087810 transitions. Word has length 58 [2021-01-20 17:50:52,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:52,319 INFO L481 AbstractCegarLoop]: Abstraction has 372474 states and 1087810 transitions. [2021-01-20 17:50:52,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:50:52,319 INFO L276 IsEmpty]: Start isEmpty. Operand 372474 states and 1087810 transitions. [2021-01-20 17:50:52,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 17:50:52,504 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:52,504 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, 1, 1] [2021-01-20 17:50:52,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-20 17:50:52,705 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:52,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:52,706 INFO L82 PathProgramCache]: Analyzing trace with hash -661958873, now seen corresponding path program 24 times [2021-01-20 17:50:52,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:52,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756359634] [2021-01-20 17:50:52,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:52,888 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:52,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756359634] [2021-01-20 17:50:52,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003298349] [2021-01-20 17:50:52,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:52,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 17:50:52,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:52,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 17:50:52,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:53,248 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:53,251 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:53,254 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:53,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:53,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 17:50:53,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282327629] [2021-01-20 17:50:53,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 17:50:53,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:53,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 17:50:53,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-01-20 17:50:53,296 INFO L87 Difference]: Start difference. First operand 372474 states and 1087810 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:50:57,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:57,113 INFO L93 Difference]: Finished difference Result 377274 states and 1101890 transitions. [2021-01-20 17:50:57,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 17:50:57,117 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 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 58 [2021-01-20 17:50:57,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:57,118 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=618, Invalid=1734, Unknown=0, NotChecked=0, Total=2352 [2021-01-20 17:50:57,118 INFO L78 Accepts]: Start accepts. Automaton has 377274 states and 1101890 transitions. Word has length 58 [2021-01-20 17:50:57,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:57,119 INFO L481 AbstractCegarLoop]: Abstraction has 377274 states and 1101890 transitions. [2021-01-20 17:50:57,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:50:57,119 INFO L276 IsEmpty]: Start isEmpty. Operand 377274 states and 1101890 transitions. [2021-01-20 17:50:57,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 17:50:57,316 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:57,316 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, 1, 1] [2021-01-20 17:50:57,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-01-20 17:50:57,530 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:57,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:57,531 INFO L82 PathProgramCache]: Analyzing trace with hash 804018355, now seen corresponding path program 25 times [2021-01-20 17:50:57,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:57,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771187019] [2021-01-20 17:50:57,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:57,710 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 17:50:57,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771187019] [2021-01-20 17:50:57,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361323255] [2021-01-20 17:50:57,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:57,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 17:50:57,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:57,960 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:57,997 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 17:50:57,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:57,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 17:50:57,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988703231] [2021-01-20 17:50:57,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 17:50:57,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:57,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 17:50:57,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-01-20 17:50:57,999 INFO L87 Difference]: Start difference. First operand 377274 states and 1101890 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:51:00,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:00,910 INFO L93 Difference]: Finished difference Result 381370 states and 1113858 transitions. [2021-01-20 17:51:00,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-20 17:51:00,910 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 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 58 [2021-01-20 17:51:00,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:00,911 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=721, Invalid=2141, Unknown=0, NotChecked=0, Total=2862 [2021-01-20 17:51:00,911 INFO L78 Accepts]: Start accepts. Automaton has 381370 states and 1113858 transitions. Word has length 58 [2021-01-20 17:51:00,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:00,911 INFO L481 AbstractCegarLoop]: Abstraction has 381370 states and 1113858 transitions. [2021-01-20 17:51:00,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:51:00,912 INFO L276 IsEmpty]: Start isEmpty. Operand 381370 states and 1113858 transitions. [2021-01-20 17:51:01,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 17:51:01,054 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:01,054 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, 1, 1] [2021-01-20 17:51:01,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:51:01,260 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:01,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:01,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1502758405, now seen corresponding path program 26 times [2021-01-20 17:51:01,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:01,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241660807] [2021-01-20 17:51:01,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:01,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:01,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241660807] [2021-01-20 17:51:01,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993538274] [2021-01-20 17:51:01,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:51:01,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:51:01,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:51:01,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 17:51:01,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:01,715 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:02,547 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:02,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:02,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 17:51:02,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667809251] [2021-01-20 17:51:02,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 17:51:02,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:02,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 17:51:02,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-01-20 17:51:02,551 INFO L87 Difference]: Start difference. First operand 381370 states and 1113858 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:51:06,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:06,013 INFO L93 Difference]: Finished difference Result 387066 states and 1130626 transitions. [2021-01-20 17:51:06,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-20 17:51:06,014 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 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 58 [2021-01-20 17:51:06,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:06,014 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=815, Invalid=2377, Unknown=0, NotChecked=0, Total=3192 [2021-01-20 17:51:06,015 INFO L78 Accepts]: Start accepts. Automaton has 387066 states and 1130626 transitions. Word has length 58 [2021-01-20 17:51:06,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:06,015 INFO L481 AbstractCegarLoop]: Abstraction has 387066 states and 1130626 transitions. [2021-01-20 17:51:06,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:51:06,015 INFO L276 IsEmpty]: Start isEmpty. Operand 387066 states and 1130626 transitions. [2021-01-20 17:51:06,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 17:51:06,189 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:06,189 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, 1, 1] [2021-01-20 17:51:06,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-20 17:51:06,403 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:06,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:06,403 INFO L82 PathProgramCache]: Analyzing trace with hash 667451665, now seen corresponding path program 27 times [2021-01-20 17:51:06,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:06,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230499703] [2021-01-20 17:51:06,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:06,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230499703] [2021-01-20 17:51:06,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732707628] [2021-01-20 17:51:06,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:51:06,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-20 17:51:06,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:51:06,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 17:51:06,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:06,885 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:06,888 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:06,889 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:06,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:06,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 17:51:06,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208985910] [2021-01-20 17:51:06,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 17:51:06,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:06,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 17:51:06,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-01-20 17:51:06,940 INFO L87 Difference]: Start difference. First operand 387066 states and 1130626 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:51:11,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:11,019 INFO L93 Difference]: Finished difference Result 390906 states and 1141890 transitions. [2021-01-20 17:51:11,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-20 17:51:11,019 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 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 58 [2021-01-20 17:51:11,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:11,021 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=824, Invalid=2598, Unknown=0, NotChecked=0, Total=3422 [2021-01-20 17:51:11,021 INFO L78 Accepts]: Start accepts. Automaton has 390906 states and 1141890 transitions. Word has length 58 [2021-01-20 17:51:11,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:11,022 INFO L481 AbstractCegarLoop]: Abstraction has 390906 states and 1141890 transitions. [2021-01-20 17:51:11,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:51:11,022 INFO L276 IsEmpty]: Start isEmpty. Operand 390906 states and 1141890 transitions. [2021-01-20 17:51:11,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 17:51:11,256 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:11,256 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, 1, 1] [2021-01-20 17:51:11,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-01-20 17:51:11,471 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:11,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:11,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1750112601, now seen corresponding path program 28 times [2021-01-20 17:51:11,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:11,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563421384] [2021-01-20 17:51:11,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:12,723 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 12 DAG size of output: 7 [2021-01-20 17:51:12,772 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:12,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563421384] [2021-01-20 17:51:12,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689108482] [2021-01-20 17:51:12,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:51:12,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 17:51:12,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:51:12,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 17:51:12,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:13,074 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:13,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:13,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 17:51:13,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939181083] [2021-01-20 17:51:13,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 17:51:13,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:13,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 17:51:13,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-01-20 17:51:13,123 INFO L87 Difference]: Start difference. First operand 390906 states and 1141890 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:51:17,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:17,067 INFO L93 Difference]: Finished difference Result 395386 states and 1154946 transitions. [2021-01-20 17:51:17,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-20 17:51:17,068 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 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 58 [2021-01-20 17:51:17,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:17,075 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=820, Invalid=2486, Unknown=0, NotChecked=0, Total=3306 [2021-01-20 17:51:17,076 INFO L78 Accepts]: Start accepts. Automaton has 395386 states and 1154946 transitions. Word has length 58 [2021-01-20 17:51:17,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:17,078 INFO L481 AbstractCegarLoop]: Abstraction has 395386 states and 1154946 transitions. [2021-01-20 17:51:17,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:51:17,078 INFO L276 IsEmpty]: Start isEmpty. Operand 395386 states and 1154946 transitions. [2021-01-20 17:51:17,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 17:51:17,295 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:17,295 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, 1, 1] [2021-01-20 17:51:17,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:51:17,510 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:17,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:17,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1051372551, now seen corresponding path program 29 times [2021-01-20 17:51:17,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:17,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036660327] [2021-01-20 17:51:17,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:17,899 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 17:51:17,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036660327] [2021-01-20 17:51:17,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014159687] [2021-01-20 17:51:17,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:51:17,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 17:51:17,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:51:17,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 17:51:17,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:18,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:18,368 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 17:51:18,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:18,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 17:51:18,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602411979] [2021-01-20 17:51:18,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 17:51:18,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:18,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 17:51:18,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-01-20 17:51:18,371 INFO L87 Difference]: Start difference. First operand 395386 states and 1154946 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:51:23,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:23,347 INFO L93 Difference]: Finished difference Result 397434 states and 1160962 transitions. [2021-01-20 17:51:23,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-20 17:51:23,348 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 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 58 [2021-01-20 17:51:23,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:23,349 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1481 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1053, Invalid=3237, Unknown=0, NotChecked=0, Total=4290 [2021-01-20 17:51:23,349 INFO L78 Accepts]: Start accepts. Automaton has 397434 states and 1160962 transitions. Word has length 58 [2021-01-20 17:51:23,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:23,349 INFO L481 AbstractCegarLoop]: Abstraction has 397434 states and 1160962 transitions. [2021-01-20 17:51:23,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:51:23,349 INFO L276 IsEmpty]: Start isEmpty. Operand 397434 states and 1160962 transitions. [2021-01-20 17:51:23,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 17:51:23,612 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:23,613 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 17:51:23,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-20 17:51:23,833 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:23,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:23,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1946130335, now seen corresponding path program 11 times [2021-01-20 17:51:23,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:23,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468450132] [2021-01-20 17:51:23,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:24,005 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:24,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468450132] [2021-01-20 17:51:24,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082585815] [2021-01-20 17:51:24,005 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:51:24,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-20 17:51:24,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:51:24,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 17:51:24,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:24,270 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:24,308 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:24,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:24,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 17:51:24,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265210861] [2021-01-20 17:51:24,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 17:51:24,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:24,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 17:51:24,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-01-20 17:51:24,310 INFO L87 Difference]: Start difference. First operand 397434 states and 1160962 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:51:28,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:28,649 INFO L93 Difference]: Finished difference Result 401146 states and 1171906 transitions. [2021-01-20 17:51:28,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-20 17:51:28,650 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 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 58 [2021-01-20 17:51:28,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:28,650 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=896, Invalid=2644, Unknown=0, NotChecked=0, Total=3540 [2021-01-20 17:51:28,651 INFO L78 Accepts]: Start accepts. Automaton has 401146 states and 1171906 transitions. Word has length 58 [2021-01-20 17:51:28,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:28,651 INFO L481 AbstractCegarLoop]: Abstraction has 401146 states and 1171906 transitions. [2021-01-20 17:51:28,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:51:28,651 INFO L276 IsEmpty]: Start isEmpty. Operand 401146 states and 1171906 transitions. [2021-01-20 17:51:29,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 17:51:29,751 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:29,751 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, 1, 1] [2021-01-20 17:51:29,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:51:29,967 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:29,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:29,968 INFO L82 PathProgramCache]: Analyzing trace with hash -2001000967, now seen corresponding path program 30 times [2021-01-20 17:51:29,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:29,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354405442] [2021-01-20 17:51:29,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:30,239 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 17:51:30,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354405442] [2021-01-20 17:51:30,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72198857] [2021-01-20 17:51:30,240 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:51:30,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 17:51:30,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:51:30,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 17:51:30,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:30,687 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:30,701 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:30,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:30,838 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 17:51:30,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:30,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 17:51:30,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548747936] [2021-01-20 17:51:30,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 17:51:30,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:30,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 17:51:30,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-01-20 17:51:30,841 INFO L87 Difference]: Start difference. First operand 401146 states and 1171906 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:51:34,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:34,994 INFO L93 Difference]: Finished difference Result 403194 states and 1177922 transitions. [2021-01-20 17:51:34,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-20 17:51:34,995 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 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 58 [2021-01-20 17:51:34,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:34,997 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=777, Invalid=2415, Unknown=0, NotChecked=0, Total=3192 [2021-01-20 17:51:34,997 INFO L78 Accepts]: Start accepts. Automaton has 403194 states and 1177922 transitions. Word has length 58 [2021-01-20 17:51:34,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:34,997 INFO L481 AbstractCegarLoop]: Abstraction has 403194 states and 1177922 transitions. [2021-01-20 17:51:34,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:51:34,997 INFO L276 IsEmpty]: Start isEmpty. Operand 403194 states and 1177922 transitions. [2021-01-20 17:51:35,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 17:51:35,204 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:35,204 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, 1, 1] [2021-01-20 17:51:35,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-20 17:51:35,419 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:35,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:35,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1916523223, now seen corresponding path program 31 times [2021-01-20 17:51:35,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:35,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537439895] [2021-01-20 17:51:35,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:35,663 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:35,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537439895] [2021-01-20 17:51:35,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786295897] [2021-01-20 17:51:35,664 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:51:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:35,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 17:51:35,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:36,121 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:36,124 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:36,126 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:36,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:36,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 17:51:36,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462838747] [2021-01-20 17:51:36,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 17:51:36,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:36,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 17:51:36,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-01-20 17:51:36,178 INFO L87 Difference]: Start difference. First operand 403194 states and 1177922 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:51:40,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:40,902 INFO L93 Difference]: Finished difference Result 404090 states and 1180546 transitions. [2021-01-20 17:51:40,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-20 17:51:40,908 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 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 58 [2021-01-20 17:51:40,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:40,909 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=633, Invalid=1719, Unknown=0, NotChecked=0, Total=2352 [2021-01-20 17:51:40,909 INFO L78 Accepts]: Start accepts. Automaton has 404090 states and 1180546 transitions. Word has length 58 [2021-01-20 17:51:40,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:40,909 INFO L481 AbstractCegarLoop]: Abstraction has 404090 states and 1180546 transitions. [2021-01-20 17:51:40,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:51:40,910 INFO L276 IsEmpty]: Start isEmpty. Operand 404090 states and 1180546 transitions. [2021-01-20 17:51:41,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 17:51:41,388 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:41,388 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, 1, 1] [2021-01-20 17:51:41,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-20 17:51:41,601 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:41,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:41,602 INFO L82 PathProgramCache]: Analyzing trace with hash 306255597, now seen corresponding path program 32 times [2021-01-20 17:51:41,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:41,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554754069] [2021-01-20 17:51:41,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:41,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554754069] [2021-01-20 17:51:41,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122711272] [2021-01-20 17:51:41,765 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:51:41,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:51:41,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:51:41,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 17:51:41,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:42,072 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:42,075 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:42,077 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:42,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:42,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 17:51:42,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962141680] [2021-01-20 17:51:42,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 17:51:42,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:42,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 17:51:42,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-01-20 17:51:42,122 INFO L87 Difference]: Start difference. First operand 404090 states and 1180546 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:51:46,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:46,095 INFO L93 Difference]: Finished difference Result 408570 states and 1193666 transitions. [2021-01-20 17:51:46,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-20 17:51:46,096 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 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 58 [2021-01-20 17:51:46,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:46,096 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=812, Invalid=2268, Unknown=0, NotChecked=0, Total=3080 [2021-01-20 17:51:46,097 INFO L78 Accepts]: Start accepts. Automaton has 408570 states and 1193666 transitions. Word has length 58 [2021-01-20 17:51:46,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:46,097 INFO L481 AbstractCegarLoop]: Abstraction has 408570 states and 1193666 transitions. [2021-01-20 17:51:46,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:51:46,097 INFO L276 IsEmpty]: Start isEmpty. Operand 408570 states and 1193666 transitions. [2021-01-20 17:51:46,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 17:51:46,297 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:46,297 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, 1, 1] [2021-01-20 17:51:46,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-20 17:51:46,512 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:46,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:46,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1772232825, now seen corresponding path program 33 times [2021-01-20 17:51:46,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:46,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811858461] [2021-01-20 17:51:46,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:47,516 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 7 [2021-01-20 17:51:47,535 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 17:51:47,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811858461] [2021-01-20 17:51:47,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462589990] [2021-01-20 17:51:47,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:51:47,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 17:51:47,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:51:47,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 17:51:47,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:48,364 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:48,439 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 17:51:48,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:48,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 17:51:48,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780507205] [2021-01-20 17:51:48,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 17:51:48,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:48,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 17:51:48,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-01-20 17:51:48,441 INFO L87 Difference]: Start difference. First operand 408570 states and 1193666 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:51:52,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:52,621 INFO L93 Difference]: Finished difference Result 412474 states and 1205058 transitions. [2021-01-20 17:51:52,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-01-20 17:51:52,622 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 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 58 [2021-01-20 17:51:52,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:52,623 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1025, Invalid=3265, Unknown=0, NotChecked=0, Total=4290 [2021-01-20 17:51:52,623 INFO L78 Accepts]: Start accepts. Automaton has 412474 states and 1205058 transitions. Word has length 58 [2021-01-20 17:51:52,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:52,623 INFO L481 AbstractCegarLoop]: Abstraction has 412474 states and 1205058 transitions. [2021-01-20 17:51:52,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:51:52,623 INFO L276 IsEmpty]: Start isEmpty. Operand 412474 states and 1205058 transitions. [2021-01-20 17:51:52,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 17:51:52,833 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:52,834 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, 1, 1] [2021-01-20 17:51:53,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-01-20 17:51:53,047 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:53,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:53,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1823994421, now seen corresponding path program 34 times [2021-01-20 17:51:53,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:53,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105039349] [2021-01-20 17:51:53,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:53,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:53,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105039349] [2021-01-20 17:51:53,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075845878] [2021-01-20 17:51:53,231 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:51:53,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 17:51:53,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:51:53,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 17:51:53,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:53,660 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:53,807 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-01-20 17:51:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:53,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:53,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 17:51:53,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035090992] [2021-01-20 17:51:53,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 17:51:53,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:53,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 17:51:53,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-01-20 17:51:53,819 INFO L87 Difference]: Start difference. First operand 412474 states and 1205058 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:51:59,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:59,041 INFO L93 Difference]: Finished difference Result 417658 states and 1220290 transitions. [2021-01-20 17:51:59,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-20 17:51:59,042 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 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 58 [2021-01-20 17:51:59,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:59,043 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1172, Invalid=3520, Unknown=0, NotChecked=0, Total=4692 [2021-01-20 17:51:59,043 INFO L78 Accepts]: Start accepts. Automaton has 417658 states and 1220290 transitions. Word has length 58 [2021-01-20 17:51:59,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:59,044 INFO L481 AbstractCegarLoop]: Abstraction has 417658 states and 1220290 transitions. [2021-01-20 17:51:59,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:51:59,044 INFO L276 IsEmpty]: Start isEmpty. Operand 417658 states and 1220290 transitions. [2021-01-20 17:52:00,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 17:52:00,167 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:52:00,168 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, 1, 1] [2021-01-20 17:52:00,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:52:00,384 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:52:00,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:52:00,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1635666135, now seen corresponding path program 35 times [2021-01-20 17:52:00,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:52:00,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624198908] [2021-01-20 17:52:00,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:52:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:52:00,645 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:52:00,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624198908] [2021-01-20 17:52:00,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381330548] [2021-01-20 17:52:00,645 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:52:00,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-20 17:52:00,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:52:00,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 17:52:00,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:52:00,920 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:52:00,923 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:52:00,925 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:52:00,977 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:52:00,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:52:00,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 17:52:00,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831556114] [2021-01-20 17:52:00,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 17:52:00,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:52:00,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 17:52:00,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-01-20 17:52:00,979 INFO L87 Difference]: Start difference. First operand 417658 states and 1220290 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:52:05,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:52:05,531 INFO L93 Difference]: Finished difference Result 419642 states and 1226114 transitions. [2021-01-20 17:52:05,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-20 17:52:05,532 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 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 58 [2021-01-20 17:52:05,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:52:05,533 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=943, Invalid=3089, Unknown=0, NotChecked=0, Total=4032 [2021-01-20 17:52:05,533 INFO L78 Accepts]: Start accepts. Automaton has 419642 states and 1226114 transitions. Word has length 58 [2021-01-20 17:52:05,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:52:05,534 INFO L481 AbstractCegarLoop]: Abstraction has 419642 states and 1226114 transitions. [2021-01-20 17:52:05,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:52:05,534 INFO L276 IsEmpty]: Start isEmpty. Operand 419642 states and 1226114 transitions. [2021-01-20 17:52:05,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 17:52:05,762 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:52:05,762 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, 1, 1] [2021-01-20 17:52:05,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-01-20 17:52:05,976 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:52:05,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:52:05,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1679925551, now seen corresponding path program 36 times [2021-01-20 17:52:05,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:52:05,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823559068] [2021-01-20 17:52:05,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:52:05,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:52:06,144 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:52:06,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823559068] [2021-01-20 17:52:06,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332358774] [2021-01-20 17:52:06,145 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:52:06,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 17:52:06,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:52:06,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 17:52:06,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:52:06,423 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:52:06,426 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:52:06,429 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:52:06,484 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:52:06,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:52:06,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 17:52:06,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483928387] [2021-01-20 17:52:06,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 17:52:06,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:52:06,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 17:52:06,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-01-20 17:52:06,487 INFO L87 Difference]: Start difference. First operand 419642 states and 1226114 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:52:08,068 WARN L193 SmtUtils]: Spent 759.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-01-20 17:52:08,460 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16