/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-6f57305 [2021-01-26 14:43:57,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-26 14:43:57,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-26 14:43:57,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-26 14:43:57,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-26 14:43:57,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-26 14:43:57,560 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-26 14:43:57,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-26 14:43:57,575 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-26 14:43:57,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-26 14:43:57,586 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-26 14:43:57,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-26 14:43:57,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-26 14:43:57,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-26 14:43:57,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-26 14:43:57,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-26 14:43:57,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-26 14:43:57,607 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-26 14:43:57,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-26 14:43:57,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-26 14:43:57,630 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-26 14:43:57,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-26 14:43:57,635 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-26 14:43:57,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-26 14:43:57,651 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-26 14:43:57,658 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-26 14:43:57,660 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-26 14:43:57,662 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-26 14:43:57,664 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-26 14:43:57,666 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-26 14:43:57,666 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-26 14:43:57,667 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-26 14:43:57,668 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-26 14:43:57,668 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-26 14:43:57,669 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-26 14:43:57,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-26 14:43:57,673 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-01-26 14:43:57,748 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-26 14:43:57,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-26 14:43:57,750 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-26 14:43:57,750 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-26 14:43:57,750 INFO L138 SettingsManager]: * Use SBE=true [2021-01-26 14:43:57,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-26 14:43:57,751 INFO L138 SettingsManager]: * sizeof long=4 [2021-01-26 14:43:57,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-26 14:43:57,751 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-01-26 14:43:57,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-26 14:43:57,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-26 14:43:57,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-26 14:43:57,752 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-26 14:43:57,752 INFO L138 SettingsManager]: * sizeof long double=12 [2021-01-26 14:43:57,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-26 14:43:57,753 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-26 14:43:57,753 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-26 14:43:57,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-26 14:43:57,754 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-26 14:43:57,754 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-01-26 14:43:57,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-26 14:43:57,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-26 14:43:57,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-26 14:43:57,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-26 14:43:57,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-26 14:43:57,755 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-26 14:43:57,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-26 14:43:57,756 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-01-26 14:43:57,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-26 14:43:57,756 INFO L138 SettingsManager]: * Minimization of abstraction=NONE [2021-01-26 14:43:57,757 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-26 14:43:58,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-26 14:43:58,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-26 14:43:58,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-26 14:43:58,291 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-26 14:43:58,292 INFO L275 PluginConnector]: CDTParser initialized [2021-01-26 14:43:58,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2021-01-26 14:43:58,400 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ed5b35ef/7d2e53ac79074d4c9f386206fc47b6ae/FLAG28d35dd34 [2021-01-26 14:43:59,379 INFO L306 CDTParser]: Found 1 translation units. [2021-01-26 14:43:59,382 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2021-01-26 14:43:59,407 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ed5b35ef/7d2e53ac79074d4c9f386206fc47b6ae/FLAG28d35dd34 [2021-01-26 14:43:59,606 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ed5b35ef/7d2e53ac79074d4c9f386206fc47b6ae [2021-01-26 14:43:59,610 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-26 14:43:59,622 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-01-26 14:43:59,624 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-26 14:43:59,625 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-26 14:43:59,630 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-26 14:43:59,632 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.01 02:43:59" (1/1) ... [2021-01-26 14:43:59,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@229fb4b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:43:59, skipping insertion in model container [2021-01-26 14:43:59,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.01 02:43:59" (1/1) ... [2021-01-26 14:43:59,649 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-26 14:43:59,695 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-26 14:44:00,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-26 14:44:00,257 INFO L203 MainTranslator]: Completed pre-run [2021-01-26 14:44:00,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-26 14:44:00,596 INFO L208 MainTranslator]: Completed translation [2021-01-26 14:44:00,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:44:00 WrapperNode [2021-01-26 14:44:00,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-26 14:44:00,604 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-26 14:44:00,604 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-26 14:44:00,605 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-26 14:44:00,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:44:00" (1/1) ... [2021-01-26 14:44:00,632 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:44:00" (1/1) ... [2021-01-26 14:44:00,654 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-26 14:44:00,656 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-26 14:44:00,656 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-26 14:44:00,656 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-26 14:44:00,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:44:00" (1/1) ... [2021-01-26 14:44:00,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:44:00" (1/1) ... [2021-01-26 14:44:00,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:44:00" (1/1) ... [2021-01-26 14:44:00,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:44:00" (1/1) ... [2021-01-26 14:44:00,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:44:00" (1/1) ... [2021-01-26 14:44:00,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:44:00" (1/1) ... [2021-01-26 14:44:00,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:44:00" (1/1) ... [2021-01-26 14:44:00,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-26 14:44:00,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-26 14:44:00,692 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-26 14:44:00,692 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-26 14:44:00,693 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:44:00" (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 [2021-01-26 14:44:00,773 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-01-26 14:44:00,773 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-01-26 14:44:00,774 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-01-26 14:44:00,774 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-01-26 14:44:00,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-26 14:44:00,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-01-26 14:44:00,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-26 14:44:00,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-26 14:44:00,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-26 14:44:00,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-01-26 14:44:00,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-26 14:44:00,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-26 14:44:00,780 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-01-26 14:44:01,361 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-26 14:44:01,362 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-26 14:44:01,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.01 02:44:01 BoogieIcfgContainer [2021-01-26 14:44:01,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-26 14:44:01,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-26 14:44:01,368 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-26 14:44:01,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-26 14:44:01,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.01 02:43:59" (1/3) ... [2021-01-26 14:44:01,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23e05205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.01 02:44:01, skipping insertion in model container [2021-01-26 14:44:01,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:44:00" (2/3) ... [2021-01-26 14:44:01,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23e05205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.01 02:44:01, skipping insertion in model container [2021-01-26 14:44:01,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.01 02:44:01" (3/3) ... [2021-01-26 14:44:01,376 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2021-01-26 14:44:01,395 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-01-26 14:44:01,396 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-26 14:44:01,401 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-26 14:44:01,403 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-01-26 14:44:01,444 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,444 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,445 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,445 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,445 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,445 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,445 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,446 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,446 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,446 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,447 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,447 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,447 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,448 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,448 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,448 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,448 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,448 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,449 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,449 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,449 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,449 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,450 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,450 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,450 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,450 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,450 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,451 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,451 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,452 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,452 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,452 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,453 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,453 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,453 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,453 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,453 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,454 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,454 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,454 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,454 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,455 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,455 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,455 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,455 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,456 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,456 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,456 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,456 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,456 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,457 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,457 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,457 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,457 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,458 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,458 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,461 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,461 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,461 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,462 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,462 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,462 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,470 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,471 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,471 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,471 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,471 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,472 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:44:01,475 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-01-26 14:44:01,492 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-26 14:44:01,523 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-26 14:44:01,523 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-26 14:44:01,524 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-26 14:44:01,524 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-26 14:44:01,524 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-26 14:44:01,524 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-26 14:44:01,524 INFO L383 AbstractCegarLoop]: Minimize is NONE [2021-01-26 14:44:01,525 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-26 14:44:01,540 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 65 places, 64 transitions, 138 flow [2021-01-26 14:44:01,710 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:01,724 INFO L276 IsEmpty]: Start isEmpty. Operand has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:01,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-26 14:44:01,745 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:01,747 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] [2021-01-26 14:44:01,747 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:01,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:01,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1900887756, now seen corresponding path program 1 times [2021-01-26 14:44:01,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:01,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238882621] [2021-01-26 14:44:01,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:02,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:02,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238882621] [2021-01-26 14:44:02,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:44:02,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-26 14:44:02,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953324698] [2021-01-26 14:44:02,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-26 14:44:02,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:02,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-26 14:44:02,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-26 14:44:02,413 INFO L87 Difference]: Start difference. First operand has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:02,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:02,841 INFO L93 Difference]: Finished difference Result 3507 states and 10199 transitions. [2021-01-26 14:44:02,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-26 14:44:02,845 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 [2021-01-26 14:44:02,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:02,885 INFO L225 Difference]: With dead ends: 3507 [2021-01-26 14:44:02,886 INFO L226 Difference]: Without dead ends: 1291 [2021-01-26 14:44:02,888 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-01-26 14:44:02,888 INFO L78 Accepts]: Start accepts. Automaton has 1291 states. Word has length 28 [2021-01-26 14:44:02,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:02,890 INFO L481 AbstractCegarLoop]: Abstraction has 1291 states. [2021-01-26 14:44:02,891 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) [2021-01-26 14:44:02,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states. [2021-01-26 14:44:02,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-26 14:44:02,899 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:02,900 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:02,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-26 14:44:02,900 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:02,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:02,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1614586761, now seen corresponding path program 1 times [2021-01-26 14:44:02,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:02,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664438105] [2021-01-26 14:44:02,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:02,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:03,344 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-01-26 14:44:03,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:03,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664438105] [2021-01-26 14:44:03,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:44:03,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-26 14:44:03,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931340206] [2021-01-26 14:44:03,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-26 14:44:03,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:03,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-26 14:44:03,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-26 14:44:03,364 INFO L87 Difference]: Start difference. First operand 1291 states. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:03,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:03,690 INFO L93 Difference]: Finished difference Result 1451 states and 3960 transitions. [2021-01-26 14:44:03,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-26 14:44:03,691 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-01-26 14:44:03,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:03,703 INFO L225 Difference]: With dead ends: 1451 [2021-01-26 14:44:03,704 INFO L226 Difference]: Without dead ends: 1235 [2021-01-26 14:44:03,706 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-01-26 14:44:03,706 INFO L78 Accepts]: Start accepts. Automaton has 1235 states. Word has length 32 [2021-01-26 14:44:03,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:03,707 INFO L481 AbstractCegarLoop]: Abstraction has 1235 states. [2021-01-26 14:44:03,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:03,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states. [2021-01-26 14:44:03,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-26 14:44:03,710 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:03,711 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:03,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-26 14:44:03,711 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:03,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:03,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1199752031, now seen corresponding path program 1 times [2021-01-26 14:44:03,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:03,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490538703] [2021-01-26 14:44:03,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:03,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:03,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490538703] [2021-01-26 14:44:03,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:44:03,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-26 14:44:03,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253380398] [2021-01-26 14:44:03,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-26 14:44:03,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:03,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-26 14:44:03,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-26 14:44:03,986 INFO L87 Difference]: Start difference. First operand 1235 states. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:04,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:04,231 INFO L93 Difference]: Finished difference Result 2139 states and 5820 transitions. [2021-01-26 14:44:04,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-26 14:44:04,232 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-01-26 14:44:04,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:04,252 INFO L225 Difference]: With dead ends: 2139 [2021-01-26 14:44:04,252 INFO L226 Difference]: Without dead ends: 1883 [2021-01-26 14:44:04,253 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-01-26 14:44:04,253 INFO L78 Accepts]: Start accepts. Automaton has 1883 states. Word has length 32 [2021-01-26 14:44:04,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:04,254 INFO L481 AbstractCegarLoop]: Abstraction has 1883 states. [2021-01-26 14:44:04,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:04,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states. [2021-01-26 14:44:04,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-26 14:44:04,258 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:04,258 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:04,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-26 14:44:04,259 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:04,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:04,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1202725261, now seen corresponding path program 2 times [2021-01-26 14:44:04,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:04,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498492367] [2021-01-26 14:44:04,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:04,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:04,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498492367] [2021-01-26 14:44:04,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:44:04,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-26 14:44:04,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149518706] [2021-01-26 14:44:04,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-26 14:44:04,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:04,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-26 14:44:04,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-26 14:44:04,533 INFO L87 Difference]: Start difference. First operand 1883 states. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:04,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:04,799 INFO L93 Difference]: Finished difference Result 1371 states and 3509 transitions. [2021-01-26 14:44:04,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-26 14:44:04,800 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-01-26 14:44:04,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:04,812 INFO L225 Difference]: With dead ends: 1371 [2021-01-26 14:44:04,813 INFO L226 Difference]: Without dead ends: 926 [2021-01-26 14:44:04,817 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-01-26 14:44:04,818 INFO L78 Accepts]: Start accepts. Automaton has 926 states. Word has length 32 [2021-01-26 14:44:04,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:04,820 INFO L481 AbstractCegarLoop]: Abstraction has 926 states. [2021-01-26 14:44:04,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:04,820 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states. [2021-01-26 14:44:04,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-26 14:44:04,827 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:04,828 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:04,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-26 14:44:04,828 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:04,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:04,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1299742308, now seen corresponding path program 1 times [2021-01-26 14:44:04,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:04,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55126325] [2021-01-26 14:44:04,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:04,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:05,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:05,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55126325] [2021-01-26 14:44:05,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:44:05,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-26 14:44:05,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873953319] [2021-01-26 14:44:05,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-26 14:44:05,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:05,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-26 14:44:05,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-01-26 14:44:05,146 INFO L87 Difference]: Start difference. First operand 926 states. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:05,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:05,439 INFO L93 Difference]: Finished difference Result 2398 states and 6462 transitions. [2021-01-26 14:44:05,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-26 14:44:05,440 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-01-26 14:44:05,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:05,460 INFO L225 Difference]: With dead ends: 2398 [2021-01-26 14:44:05,460 INFO L226 Difference]: Without dead ends: 2119 [2021-01-26 14:44:05,461 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-01-26 14:44:05,461 INFO L78 Accepts]: Start accepts. Automaton has 2119 states. Word has length 36 [2021-01-26 14:44:05,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:05,462 INFO L481 AbstractCegarLoop]: Abstraction has 2119 states. [2021-01-26 14:44:05,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:05,462 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states. [2021-01-26 14:44:05,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-26 14:44:05,465 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:05,465 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:05,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-26 14:44:05,465 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:05,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:05,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1296769078, now seen corresponding path program 2 times [2021-01-26 14:44:05,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:05,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735231833] [2021-01-26 14:44:05,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:05,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735231833] [2021-01-26 14:44:05,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:44:05,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-26 14:44:05,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594832072] [2021-01-26 14:44:05,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-26 14:44:05,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:05,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-26 14:44:05,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-01-26 14:44:05,657 INFO L87 Difference]: Start difference. First operand 2119 states. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:06,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:06,063 INFO L93 Difference]: Finished difference Result 1671 states and 4289 transitions. [2021-01-26 14:44:06,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-26 14:44:06,065 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-01-26 14:44:06,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:06,075 INFO L225 Difference]: With dead ends: 1671 [2021-01-26 14:44:06,076 INFO L226 Difference]: Without dead ends: 1105 [2021-01-26 14:44:06,076 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:44:06,077 INFO L78 Accepts]: Start accepts. Automaton has 1105 states. Word has length 36 [2021-01-26 14:44:06,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:06,077 INFO L481 AbstractCegarLoop]: Abstraction has 1105 states. [2021-01-26 14:44:06,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:06,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states. [2021-01-26 14:44:06,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-26 14:44:06,082 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:06,082 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:06,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-26 14:44:06,083 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:06,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:06,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1854918631, now seen corresponding path program 1 times [2021-01-26 14:44:06,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:06,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40776631] [2021-01-26 14:44:06,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:06,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:06,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:06,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40776631] [2021-01-26 14:44:06,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293858390] [2021-01-26 14:44:06,273 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 [2021-01-26 14:44:06,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:06,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-26 14:44:06,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:06,484 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:06,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:06,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:06,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-26 14:44:06,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98762729] [2021-01-26 14:44:06,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-26 14:44:06,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:06,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-26 14:44:06,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-01-26 14:44:06,504 INFO L87 Difference]: Start difference. First operand 1105 states. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:06,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:06,913 INFO L93 Difference]: Finished difference Result 1425 states and 3650 transitions. [2021-01-26 14:44:06,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-26 14:44:06,914 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-01-26 14:44:06,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:06,925 INFO L225 Difference]: With dead ends: 1425 [2021-01-26 14:44:06,925 INFO L226 Difference]: Without dead ends: 1155 [2021-01-26 14:44:06,926 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:44:06,926 INFO L78 Accepts]: Start accepts. Automaton has 1155 states. Word has length 41 [2021-01-26 14:44:06,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:06,927 INFO L481 AbstractCegarLoop]: Abstraction has 1155 states. [2021-01-26 14:44:06,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:06,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states. [2021-01-26 14:44:06,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-26 14:44:06,931 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:06,933 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:07,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-26 14:44:07,149 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:07,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:07,150 INFO L82 PathProgramCache]: Analyzing trace with hash 467840107, now seen corresponding path program 2 times [2021-01-26 14:44:07,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:07,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94428359] [2021-01-26 14:44:07,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:07,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94428359] [2021-01-26 14:44:07,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006856927] [2021-01-26 14:44:07,329 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 [2021-01-26 14:44:07,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:44:07,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:07,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-26 14:44:07,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:07,460 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:44:07,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:07,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:07,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:07,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-01-26 14:44:07,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684282135] [2021-01-26 14:44:07,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-26 14:44:07,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:07,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-26 14:44:07,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-01-26 14:44:07,524 INFO L87 Difference]: Start difference. First operand 1155 states. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:07,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:07,860 INFO L93 Difference]: Finished difference Result 1635 states and 4150 transitions. [2021-01-26 14:44:07,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-26 14:44:07,861 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-01-26 14:44:07,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:07,873 INFO L225 Difference]: With dead ends: 1635 [2021-01-26 14:44:07,874 INFO L226 Difference]: Without dead ends: 1350 [2021-01-26 14:44:07,875 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-01-26 14:44:07,875 INFO L78 Accepts]: Start accepts. Automaton has 1350 states. Word has length 41 [2021-01-26 14:44:07,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:07,876 INFO L481 AbstractCegarLoop]: Abstraction has 1350 states. [2021-01-26 14:44:07,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:07,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states. [2021-01-26 14:44:07,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-26 14:44:07,880 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:07,881 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:08,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:08,096 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:08,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:08,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1873860069, now seen corresponding path program 3 times [2021-01-26 14:44:08,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:08,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71756689] [2021-01-26 14:44:08,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:08,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:08,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71756689] [2021-01-26 14:44:08,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094794340] [2021-01-26 14:44:08,286 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 [2021-01-26 14:44:08,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-26 14:44:08,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:08,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-26 14:44:08,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:08,461 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:08,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:08,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-26 14:44:08,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717932941] [2021-01-26 14:44:08,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-26 14:44:08,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:08,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-26 14:44:08,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-01-26 14:44:08,472 INFO L87 Difference]: Start difference. First operand 1350 states. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:08,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:08,786 INFO L93 Difference]: Finished difference Result 2822 states and 7484 transitions. [2021-01-26 14:44:08,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-26 14:44:08,787 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-01-26 14:44:08,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:08,808 INFO L225 Difference]: With dead ends: 2822 [2021-01-26 14:44:08,808 INFO L226 Difference]: Without dead ends: 2552 [2021-01-26 14:44:08,809 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-01-26 14:44:08,809 INFO L78 Accepts]: Start accepts. Automaton has 2552 states. Word has length 41 [2021-01-26 14:44:08,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:08,809 INFO L481 AbstractCegarLoop]: Abstraction has 2552 states. [2021-01-26 14:44:08,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:08,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states. [2021-01-26 14:44:08,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-26 14:44:08,814 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:08,814 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:09,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:09,028 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:09,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:09,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1870886839, now seen corresponding path program 4 times [2021-01-26 14:44:09,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:09,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965144354] [2021-01-26 14:44:09,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:09,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:09,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965144354] [2021-01-26 14:44:09,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146203301] [2021-01-26 14:44:09,285 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 [2021-01-26 14:44:09,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:44:09,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:09,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:44:09,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:09,417 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:44:09,463 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:09,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:09,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:09,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-01-26 14:44:09,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532471869] [2021-01-26 14:44:09,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-26 14:44:09,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:09,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-26 14:44:09,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-01-26 14:44:09,477 INFO L87 Difference]: Start difference. First operand 2552 states. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:09,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:09,907 INFO L93 Difference]: Finished difference Result 2360 states and 5966 transitions. [2021-01-26 14:44:09,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-26 14:44:09,908 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-01-26 14:44:09,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:09,921 INFO L225 Difference]: With dead ends: 2360 [2021-01-26 14:44:09,921 INFO L226 Difference]: Without dead ends: 1705 [2021-01-26 14:44:09,922 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:44:09,922 INFO L78 Accepts]: Start accepts. Automaton has 1705 states. Word has length 41 [2021-01-26 14:44:09,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:09,923 INFO L481 AbstractCegarLoop]: Abstraction has 1705 states. [2021-01-26 14:44:09,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:09,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states. [2021-01-26 14:44:09,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-26 14:44:09,927 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:09,927 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:10,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:10,142 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:10,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:10,144 INFO L82 PathProgramCache]: Analyzing trace with hash 697126713, now seen corresponding path program 1 times [2021-01-26 14:44:10,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:10,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489208393] [2021-01-26 14:44:10,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:10,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:10,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489208393] [2021-01-26 14:44:10,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778533481] [2021-01-26 14:44:10,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:10,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:10,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-26 14:44:10,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:10,444 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:10,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:10,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-26 14:44:10,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439976429] [2021-01-26 14:44:10,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-26 14:44:10,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:10,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-26 14:44:10,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-01-26 14:44:10,454 INFO L87 Difference]: Start difference. First operand 1705 states. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:10,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:10,665 INFO L93 Difference]: Finished difference Result 2025 states and 5060 transitions. [2021-01-26 14:44:10,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-26 14:44:10,666 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-01-26 14:44:10,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:10,694 INFO L225 Difference]: With dead ends: 2025 [2021-01-26 14:44:10,695 INFO L226 Difference]: Without dead ends: 1755 [2021-01-26 14:44:10,698 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-01-26 14:44:10,698 INFO L78 Accepts]: Start accepts. Automaton has 1755 states. Word has length 46 [2021-01-26 14:44:10,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:10,698 INFO L481 AbstractCegarLoop]: Abstraction has 1755 states. [2021-01-26 14:44:10,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:10,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states. [2021-01-26 14:44:10,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-26 14:44:10,707 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:10,708 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:10,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-26 14:44:10,911 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:10,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:10,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1275081845, now seen corresponding path program 2 times [2021-01-26 14:44:10,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:10,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247312056] [2021-01-26 14:44:10,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:10,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:11,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247312056] [2021-01-26 14:44:11,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721661805] [2021-01-26 14:44:11,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:11,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:44:11,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:11,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-26 14:44:11,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:11,260 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:44:11,292 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:11,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:11,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-01-26 14:44:11,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030725501] [2021-01-26 14:44:11,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-26 14:44:11,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:11,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-26 14:44:11,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-01-26 14:44:11,300 INFO L87 Difference]: Start difference. First operand 1755 states. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:11,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:11,603 INFO L93 Difference]: Finished difference Result 2115 states and 5240 transitions. [2021-01-26 14:44:11,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-26 14:44:11,604 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-01-26 14:44:11,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:11,612 INFO L225 Difference]: With dead ends: 2115 [2021-01-26 14:44:11,613 INFO L226 Difference]: Without dead ends: 1845 [2021-01-26 14:44:11,614 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:44:11,614 INFO L78 Accepts]: Start accepts. Automaton has 1845 states. Word has length 46 [2021-01-26 14:44:11,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:11,615 INFO L481 AbstractCegarLoop]: Abstraction has 1845 states. [2021-01-26 14:44:11,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:11,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states. [2021-01-26 14:44:11,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-26 14:44:11,620 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:11,620 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:11,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:11,835 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:11,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:11,835 INFO L82 PathProgramCache]: Analyzing trace with hash 130938117, now seen corresponding path program 3 times [2021-01-26 14:44:11,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:11,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527775052] [2021-01-26 14:44:11,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:12,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527775052] [2021-01-26 14:44:12,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098737077] [2021-01-26 14:44:12,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:12,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-26 14:44:12,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:12,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-26 14:44:12,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:12,200 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:12,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:12,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:12,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-26 14:44:12,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188119200] [2021-01-26 14:44:12,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-26 14:44:12,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:12,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-26 14:44:12,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-01-26 14:44:12,217 INFO L87 Difference]: Start difference. First operand 1845 states. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:12,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:12,450 INFO L93 Difference]: Finished difference Result 3317 states and 8604 transitions. [2021-01-26 14:44:12,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-26 14:44:12,451 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-01-26 14:44:12,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:12,471 INFO L225 Difference]: With dead ends: 3317 [2021-01-26 14:44:12,471 INFO L226 Difference]: Without dead ends: 3047 [2021-01-26 14:44:12,472 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-01-26 14:44:12,472 INFO L78 Accepts]: Start accepts. Automaton has 3047 states. Word has length 46 [2021-01-26 14:44:12,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:12,473 INFO L481 AbstractCegarLoop]: Abstraction has 3047 states. [2021-01-26 14:44:12,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:12,473 INFO L276 IsEmpty]: Start isEmpty. Operand 3047 states. [2021-01-26 14:44:12,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-26 14:44:12,478 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:12,478 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:12,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:12,692 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:12,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:12,693 INFO L82 PathProgramCache]: Analyzing trace with hash 127964887, now seen corresponding path program 4 times [2021-01-26 14:44:12,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:12,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132941407] [2021-01-26 14:44:12,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:12,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:12,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:12,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132941407] [2021-01-26 14:44:12,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720116840] [2021-01-26 14:44:12,813 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:12,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:44:12,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:12,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:44:12,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:12,930 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:44:12,955 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:13,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:13,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-26 14:44:13,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122707335] [2021-01-26 14:44:13,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-26 14:44:13,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:13,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-26 14:44:13,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-01-26 14:44:13,024 INFO L87 Difference]: Start difference. First operand 3047 states. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:13,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:13,388 INFO L93 Difference]: Finished difference Result 2599 states and 6446 transitions. [2021-01-26 14:44:13,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-26 14:44:13,389 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-01-26 14:44:13,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:13,397 INFO L225 Difference]: With dead ends: 2599 [2021-01-26 14:44:13,397 INFO L226 Difference]: Without dead ends: 2000 [2021-01-26 14:44:13,398 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-01-26 14:44:13,398 INFO L78 Accepts]: Start accepts. Automaton has 2000 states. Word has length 46 [2021-01-26 14:44:13,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:13,398 INFO L481 AbstractCegarLoop]: Abstraction has 2000 states. [2021-01-26 14:44:13,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:13,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states. [2021-01-26 14:44:13,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-26 14:44:13,405 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:13,405 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] [2021-01-26 14:44:13,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-26 14:44:13,620 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:13,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:13,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1328082230, now seen corresponding path program 5 times [2021-01-26 14:44:13,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:13,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376558989] [2021-01-26 14:44:13,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:13,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:13,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376558989] [2021-01-26 14:44:13,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865872290] [2021-01-26 14:44:13,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:13,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:44:13,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:13,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:44:13,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:13,866 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:13,874 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:13,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:13,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-26 14:44:13,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298472383] [2021-01-26 14:44:13,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-26 14:44:13,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:13,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-26 14:44:13,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-01-26 14:44:13,878 INFO L87 Difference]: Start difference. First operand 2000 states. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:14,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:14,067 INFO L93 Difference]: Finished difference Result 2320 states and 5720 transitions. [2021-01-26 14:44:14,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-26 14:44:14,068 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-01-26 14:44:14,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:14,074 INFO L225 Difference]: With dead ends: 2320 [2021-01-26 14:44:14,075 INFO L226 Difference]: Without dead ends: 2050 [2021-01-26 14:44:14,075 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:44:14,076 INFO L78 Accepts]: Start accepts. Automaton has 2050 states. Word has length 51 [2021-01-26 14:44:14,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:14,076 INFO L481 AbstractCegarLoop]: Abstraction has 2050 states. [2021-01-26 14:44:14,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:14,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states. [2021-01-26 14:44:14,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-26 14:44:14,081 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:14,082 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:14,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-26 14:44:14,296 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:14,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:14,297 INFO L82 PathProgramCache]: Analyzing trace with hash -861941604, now seen corresponding path program 6 times [2021-01-26 14:44:14,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:14,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127653723] [2021-01-26 14:44:14,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:14,451 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:14,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127653723] [2021-01-26 14:44:14,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283400397] [2021-01-26 14:44:14,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:14,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-26 14:44:14,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:14,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:44:14,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:14,543 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:44:14,600 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:14,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:14,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-01-26 14:44:14,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091453331] [2021-01-26 14:44:14,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-26 14:44:14,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:14,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-26 14:44:14,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-26 14:44:14,618 INFO L87 Difference]: Start difference. First operand 2050 states. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:15,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:15,015 INFO L93 Difference]: Finished difference Result 2370 states and 5820 transitions. [2021-01-26 14:44:15,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-26 14:44:15,016 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-01-26 14:44:15,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:15,024 INFO L225 Difference]: With dead ends: 2370 [2021-01-26 14:44:15,024 INFO L226 Difference]: Without dead ends: 2100 [2021-01-26 14:44:15,025 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:44:15,025 INFO L78 Accepts]: Start accepts. Automaton has 2100 states. Word has length 51 [2021-01-26 14:44:15,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:15,025 INFO L481 AbstractCegarLoop]: Abstraction has 2100 states. [2021-01-26 14:44:15,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:15,026 INFO L276 IsEmpty]: Start isEmpty. Operand 2100 states. [2021-01-26 14:44:15,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-26 14:44:15,032 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:15,032 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:15,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-26 14:44:15,247 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:15,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:15,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1106515018, now seen corresponding path program 7 times [2021-01-26 14:44:15,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:15,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453408032] [2021-01-26 14:44:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:15,405 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:15,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453408032] [2021-01-26 14:44:15,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494545831] [2021-01-26 14:44:15,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:15,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:44:15,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:15,522 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:15,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:15,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-26 14:44:15,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143678153] [2021-01-26 14:44:15,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-26 14:44:15,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:15,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-26 14:44:15,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-01-26 14:44:15,538 INFO L87 Difference]: Start difference. First operand 2100 states. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:15,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:15,836 INFO L93 Difference]: Finished difference Result 2420 states and 5920 transitions. [2021-01-26 14:44:15,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-26 14:44:15,837 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-01-26 14:44:15,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:15,846 INFO L225 Difference]: With dead ends: 2420 [2021-01-26 14:44:15,846 INFO L226 Difference]: Without dead ends: 2150 [2021-01-26 14:44:15,847 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:44:15,847 INFO L78 Accepts]: Start accepts. Automaton has 2150 states. Word has length 51 [2021-01-26 14:44:15,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:15,848 INFO L481 AbstractCegarLoop]: Abstraction has 2150 states. [2021-01-26 14:44:15,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:15,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states. [2021-01-26 14:44:15,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-26 14:44:15,855 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:15,855 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:16,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-26 14:44:16,069 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:16,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:16,071 INFO L82 PathProgramCache]: Analyzing trace with hash -186912122, now seen corresponding path program 8 times [2021-01-26 14:44:16,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:16,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156241918] [2021-01-26 14:44:16,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:16,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:16,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156241918] [2021-01-26 14:44:16,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648945664] [2021-01-26 14:44:16,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:16,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:44:16,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:16,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:44:16,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:16,302 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:44:16,335 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:16,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:16,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:16,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-01-26 14:44:16,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16742218] [2021-01-26 14:44:16,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-26 14:44:16,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:16,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-26 14:44:16,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-01-26 14:44:16,350 INFO L87 Difference]: Start difference. First operand 2150 states. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:16,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:16,776 INFO L93 Difference]: Finished difference Result 2700 states and 6560 transitions. [2021-01-26 14:44:16,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-26 14:44:16,777 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-01-26 14:44:16,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:16,785 INFO L225 Difference]: With dead ends: 2700 [2021-01-26 14:44:16,785 INFO L226 Difference]: Without dead ends: 2400 [2021-01-26 14:44:16,786 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-01-26 14:44:16,786 INFO L78 Accepts]: Start accepts. Automaton has 2400 states. Word has length 51 [2021-01-26 14:44:16,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:16,787 INFO L481 AbstractCegarLoop]: Abstraction has 2400 states. [2021-01-26 14:44:16,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:16,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states. [2021-01-26 14:44:16,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-26 14:44:16,794 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:16,794 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:17,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-26 14:44:17,035 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:17,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:17,036 INFO L82 PathProgramCache]: Analyzing trace with hash 165163796, now seen corresponding path program 9 times [2021-01-26 14:44:17,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:17,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334109724] [2021-01-26 14:44:17,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:17,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:17,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334109724] [2021-01-26 14:44:17,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195888838] [2021-01-26 14:44:17,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-26 14:44:17,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:44:17,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:17,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:44:17,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:17,247 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:17,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:17,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:17,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-26 14:44:17,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559679896] [2021-01-26 14:44:17,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-26 14:44:17,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:17,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-26 14:44:17,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-01-26 14:44:17,266 INFO L87 Difference]: Start difference. First operand 2400 states. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:17,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:17,581 INFO L93 Difference]: Finished difference Result 3872 states and 9864 transitions. [2021-01-26 14:44:17,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-26 14:44:17,582 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-01-26 14:44:17,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:17,595 INFO L225 Difference]: With dead ends: 3872 [2021-01-26 14:44:17,596 INFO L226 Difference]: Without dead ends: 3587 [2021-01-26 14:44:17,596 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-01-26 14:44:17,596 INFO L78 Accepts]: Start accepts. Automaton has 3587 states. Word has length 51 [2021-01-26 14:44:17,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:17,597 INFO L481 AbstractCegarLoop]: Abstraction has 3587 states. [2021-01-26 14:44:17,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:17,597 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states. [2021-01-26 14:44:17,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-26 14:44:17,604 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:17,604 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:17,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:17,818 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:17,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:17,819 INFO L82 PathProgramCache]: Analyzing trace with hash 162190566, now seen corresponding path program 10 times [2021-01-26 14:44:17,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:17,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573541005] [2021-01-26 14:44:17,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:17,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573541005] [2021-01-26 14:44:17,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706402307] [2021-01-26 14:44:17,964 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 [2021-01-26 14:44:18,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:44:18,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:18,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:44:18,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:18,058 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:44:18,087 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:18,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:18,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-01-26 14:44:18,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642610732] [2021-01-26 14:44:18,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-26 14:44:18,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:18,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-26 14:44:18,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-01-26 14:44:18,100 INFO L87 Difference]: Start difference. First operand 3587 states. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:18,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:18,561 INFO L93 Difference]: Finished difference Result 3520 states and 8601 transitions. [2021-01-26 14:44:18,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-26 14:44:18,562 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-01-26 14:44:18,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:18,570 INFO L225 Difference]: With dead ends: 3520 [2021-01-26 14:44:18,571 INFO L226 Difference]: Without dead ends: 2835 [2021-01-26 14:44:18,572 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-01-26 14:44:18,572 INFO L78 Accepts]: Start accepts. Automaton has 2835 states. Word has length 51 [2021-01-26 14:44:18,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:18,573 INFO L481 AbstractCegarLoop]: Abstraction has 2835 states. [2021-01-26 14:44:18,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:18,573 INFO L276 IsEmpty]: Start isEmpty. Operand 2835 states. [2021-01-26 14:44:18,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-26 14:44:18,580 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:18,580 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:18,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:18,795 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:18,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:18,796 INFO L82 PathProgramCache]: Analyzing trace with hash -688928278, now seen corresponding path program 11 times [2021-01-26 14:44:18,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:18,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779932615] [2021-01-26 14:44:18,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:19,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779932615] [2021-01-26 14:44:19,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165396971] [2021-01-26 14:44:19,045 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 [2021-01-26 14:44:19,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-26 14:44:19,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:19,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:44:19,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:19,230 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:19,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:19,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-01-26 14:44:19,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344236325] [2021-01-26 14:44:19,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-26 14:44:19,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:19,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-26 14:44:19,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-01-26 14:44:19,248 INFO L87 Difference]: Start difference. First operand 2835 states. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:19,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:19,505 INFO L93 Difference]: Finished difference Result 3155 states and 7620 transitions. [2021-01-26 14:44:19,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-26 14:44:19,506 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-01-26 14:44:19,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:19,518 INFO L225 Difference]: With dead ends: 3155 [2021-01-26 14:44:19,518 INFO L226 Difference]: Without dead ends: 2885 [2021-01-26 14:44:19,519 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:44:19,519 INFO L78 Accepts]: Start accepts. Automaton has 2885 states. Word has length 56 [2021-01-26 14:44:19,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:19,519 INFO L481 AbstractCegarLoop]: Abstraction has 2885 states. [2021-01-26 14:44:19,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:19,520 INFO L276 IsEmpty]: Start isEmpty. Operand 2885 states. [2021-01-26 14:44:19,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-26 14:44:19,528 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:19,528 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:19,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-26 14:44:19,743 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:19,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:19,745 INFO L82 PathProgramCache]: Analyzing trace with hash -222787652, now seen corresponding path program 12 times [2021-01-26 14:44:19,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:19,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233322122] [2021-01-26 14:44:19,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:19,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233322122] [2021-01-26 14:44:19,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577493049] [2021-01-26 14:44:19,908 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 [2021-01-26 14:44:19,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-26 14:44:19,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:19,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:44:19,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:19,998 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:44:20,023 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:20,037 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:20,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:20,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-26 14:44:20,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657025689] [2021-01-26 14:44:20,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-26 14:44:20,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:20,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-26 14:44:20,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-01-26 14:44:20,041 INFO L87 Difference]: Start difference. First operand 2885 states. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:20,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:20,407 INFO L93 Difference]: Finished difference Result 3205 states and 7720 transitions. [2021-01-26 14:44:20,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-26 14:44:20,408 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-01-26 14:44:20,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:20,417 INFO L225 Difference]: With dead ends: 3205 [2021-01-26 14:44:20,418 INFO L226 Difference]: Without dead ends: 2935 [2021-01-26 14:44:20,418 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2021-01-26 14:44:20,418 INFO L78 Accepts]: Start accepts. Automaton has 2935 states. Word has length 56 [2021-01-26 14:44:20,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:20,419 INFO L481 AbstractCegarLoop]: Abstraction has 2935 states. [2021-01-26 14:44:20,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:20,419 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states. [2021-01-26 14:44:20,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-26 14:44:20,427 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:20,427 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:20,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:20,636 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:20,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:20,637 INFO L82 PathProgramCache]: Analyzing trace with hash -467361066, now seen corresponding path program 13 times [2021-01-26 14:44:20,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:20,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042713019] [2021-01-26 14:44:20,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:20,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042713019] [2021-01-26 14:44:20,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504904719] [2021-01-26 14:44:20,777 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 [2021-01-26 14:44:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:20,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:44:20,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:20,868 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:20,879 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:20,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:20,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-01-26 14:44:20,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823517903] [2021-01-26 14:44:20,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-26 14:44:20,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:20,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-26 14:44:20,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-01-26 14:44:20,881 INFO L87 Difference]: Start difference. First operand 2935 states. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:21,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:21,164 INFO L93 Difference]: Finished difference Result 3255 states and 7820 transitions. [2021-01-26 14:44:21,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-26 14:44:21,165 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-01-26 14:44:21,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:21,176 INFO L225 Difference]: With dead ends: 3255 [2021-01-26 14:44:21,176 INFO L226 Difference]: Without dead ends: 2985 [2021-01-26 14:44:21,177 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-01-26 14:44:21,177 INFO L78 Accepts]: Start accepts. Automaton has 2985 states. Word has length 56 [2021-01-26 14:44:21,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:21,177 INFO L481 AbstractCegarLoop]: Abstraction has 2985 states. [2021-01-26 14:44:21,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:21,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2985 states. [2021-01-26 14:44:21,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-26 14:44:21,183 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:21,183 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:21,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-26 14:44:21,398 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:21,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:21,399 INFO L82 PathProgramCache]: Analyzing trace with hash 452241830, now seen corresponding path program 14 times [2021-01-26 14:44:21,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:21,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450573756] [2021-01-26 14:44:21,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:21,551 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:21,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450573756] [2021-01-26 14:44:21,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636755200] [2021-01-26 14:44:21,552 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 [2021-01-26 14:44:21,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:44:21,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:21,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:44:21,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:21,686 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:44:21,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:21,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:21,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-26 14:44:21,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503585294] [2021-01-26 14:44:21,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-26 14:44:21,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:21,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-26 14:44:21,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-01-26 14:44:21,754 INFO L87 Difference]: Start difference. First operand 2985 states. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:22,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:22,371 INFO L93 Difference]: Finished difference Result 3345 states and 8000 transitions. [2021-01-26 14:44:22,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-26 14:44:22,372 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-01-26 14:44:22,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:22,380 INFO L225 Difference]: With dead ends: 3345 [2021-01-26 14:44:22,380 INFO L226 Difference]: Without dead ends: 3075 [2021-01-26 14:44:22,381 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2021-01-26 14:44:22,381 INFO L78 Accepts]: Start accepts. Automaton has 3075 states. Word has length 56 [2021-01-26 14:44:22,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:22,381 INFO L481 AbstractCegarLoop]: Abstraction has 3075 states. [2021-01-26 14:44:22,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:22,382 INFO L276 IsEmpty]: Start isEmpty. Operand 3075 states. [2021-01-26 14:44:22,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-26 14:44:22,388 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:22,388 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:22,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-26 14:44:22,604 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:22,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:22,604 INFO L82 PathProgramCache]: Analyzing trace with hash 804317748, now seen corresponding path program 15 times [2021-01-26 14:44:22,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:22,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694297419] [2021-01-26 14:44:22,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:22,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:22,765 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:22,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694297419] [2021-01-26 14:44:22,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040721596] [2021-01-26 14:44:22,766 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 [2021-01-26 14:44:22,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-26 14:44:22,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:22,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:44:22,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:22,881 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:22,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:22,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-01-26 14:44:22,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881539206] [2021-01-26 14:44:22,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-26 14:44:22,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:22,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-26 14:44:22,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-01-26 14:44:22,892 INFO L87 Difference]: Start difference. First operand 3075 states. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:23,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:23,222 INFO L93 Difference]: Finished difference Result 4547 states and 11364 transitions. [2021-01-26 14:44:23,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-26 14:44:23,223 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-01-26 14:44:23,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:23,233 INFO L225 Difference]: With dead ends: 4547 [2021-01-26 14:44:23,233 INFO L226 Difference]: Without dead ends: 4277 [2021-01-26 14:44:23,234 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-01-26 14:44:23,234 INFO L78 Accepts]: Start accepts. Automaton has 4277 states. Word has length 56 [2021-01-26 14:44:23,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:23,234 INFO L481 AbstractCegarLoop]: Abstraction has 4277 states. [2021-01-26 14:44:23,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:23,235 INFO L276 IsEmpty]: Start isEmpty. Operand 4277 states. [2021-01-26 14:44:23,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-26 14:44:23,241 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:23,242 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:23,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-26 14:44:23,457 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:23,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:23,458 INFO L82 PathProgramCache]: Analyzing trace with hash 801344518, now seen corresponding path program 16 times [2021-01-26 14:44:23,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:23,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886824064] [2021-01-26 14:44:23,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:23,590 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:23,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886824064] [2021-01-26 14:44:23,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544034039] [2021-01-26 14:44:23,593 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 [2021-01-26 14:44:23,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:44:23,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:23,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:44:23,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:23,690 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:44:23,713 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:23,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:23,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-01-26 14:44:23,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811835423] [2021-01-26 14:44:23,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-26 14:44:23,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:23,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-26 14:44:23,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-01-26 14:44:23,728 INFO L87 Difference]: Start difference. First operand 4277 states. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:24,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:24,287 INFO L93 Difference]: Finished difference Result 4085 states and 9846 transitions. [2021-01-26 14:44:24,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-26 14:44:24,288 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-01-26 14:44:24,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:24,294 INFO L225 Difference]: With dead ends: 4085 [2021-01-26 14:44:24,294 INFO L226 Difference]: Without dead ends: 3430 [2021-01-26 14:44:24,295 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2021-01-26 14:44:24,296 INFO L78 Accepts]: Start accepts. Automaton has 3430 states. Word has length 56 [2021-01-26 14:44:24,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:24,296 INFO L481 AbstractCegarLoop]: Abstraction has 3430 states. [2021-01-26 14:44:24,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:24,296 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states. [2021-01-26 14:44:24,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-26 14:44:24,303 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:24,304 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:24,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-26 14:44:24,519 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:24,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:24,520 INFO L82 PathProgramCache]: Analyzing trace with hash 548080699, now seen corresponding path program 17 times [2021-01-26 14:44:24,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:24,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821854102] [2021-01-26 14:44:24,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:24,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821854102] [2021-01-26 14:44:24,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53904778] [2021-01-26 14:44:24,704 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 [2021-01-26 14:44:24,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-26 14:44:24,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:24,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:44:24,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:24,820 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:24,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:24,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-26 14:44:24,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803193819] [2021-01-26 14:44:24,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-26 14:44:24,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:24,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-26 14:44:24,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-01-26 14:44:24,835 INFO L87 Difference]: Start difference. First operand 3430 states. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:25,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:25,238 INFO L93 Difference]: Finished difference Result 3750 states and 8940 transitions. [2021-01-26 14:44:25,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-26 14:44:25,239 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-26 14:44:25,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:25,246 INFO L225 Difference]: With dead ends: 3750 [2021-01-26 14:44:25,246 INFO L226 Difference]: Without dead ends: 3480 [2021-01-26 14:44:25,246 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-01-26 14:44:25,246 INFO L78 Accepts]: Start accepts. Automaton has 3480 states. Word has length 61 [2021-01-26 14:44:25,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:25,247 INFO L481 AbstractCegarLoop]: Abstraction has 3480 states. [2021-01-26 14:44:25,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:25,247 INFO L276 IsEmpty]: Start isEmpty. Operand 3480 states. [2021-01-26 14:44:25,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-26 14:44:25,255 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:25,256 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:25,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-26 14:44:25,471 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:25,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:25,472 INFO L82 PathProgramCache]: Analyzing trace with hash 503720845, now seen corresponding path program 18 times [2021-01-26 14:44:25,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:25,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825405296] [2021-01-26 14:44:25,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:25,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:25,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825405296] [2021-01-26 14:44:25,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105166632] [2021-01-26 14:44:25,675 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 [2021-01-26 14:44:25,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-26 14:44:25,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:25,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:44:25,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:25,784 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:44:25,826 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:25,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:25,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-01-26 14:44:25,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549225556] [2021-01-26 14:44:25,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:44:25,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:25,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:44:25,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:44:25,848 INFO L87 Difference]: Start difference. First operand 3480 states. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:26,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:26,222 INFO L93 Difference]: Finished difference Result 3800 states and 9040 transitions. [2021-01-26 14:44:26,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-26 14:44:26,224 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-26 14:44:26,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:26,231 INFO L225 Difference]: With dead ends: 3800 [2021-01-26 14:44:26,231 INFO L226 Difference]: Without dead ends: 3530 [2021-01-26 14:44:26,232 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2021-01-26 14:44:26,232 INFO L78 Accepts]: Start accepts. Automaton has 3530 states. Word has length 61 [2021-01-26 14:44:26,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:26,232 INFO L481 AbstractCegarLoop]: Abstraction has 3530 states. [2021-01-26 14:44:26,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:26,232 INFO L276 IsEmpty]: Start isEmpty. Operand 3530 states. [2021-01-26 14:44:26,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-26 14:44:26,241 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:26,241 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:26,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:26,456 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:26,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:26,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1988537895, now seen corresponding path program 19 times [2021-01-26 14:44:26,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:26,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559549288] [2021-01-26 14:44:26,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:26,632 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:26,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559549288] [2021-01-26 14:44:26,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519910865] [2021-01-26 14:44:26,633 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 [2021-01-26 14:44:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:26,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:44:26,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:26,762 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:26,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:26,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-26 14:44:26,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424423123] [2021-01-26 14:44:26,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-26 14:44:26,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:26,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-26 14:44:26,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-01-26 14:44:26,780 INFO L87 Difference]: Start difference. First operand 3530 states. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:27,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:27,078 INFO L93 Difference]: Finished difference Result 3850 states and 9140 transitions. [2021-01-26 14:44:27,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-26 14:44:27,079 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-26 14:44:27,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:27,086 INFO L225 Difference]: With dead ends: 3850 [2021-01-26 14:44:27,086 INFO L226 Difference]: Without dead ends: 3580 [2021-01-26 14:44:27,087 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-01-26 14:44:27,087 INFO L78 Accepts]: Start accepts. Automaton has 3580 states. Word has length 61 [2021-01-26 14:44:27,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:27,087 INFO L481 AbstractCegarLoop]: Abstraction has 3580 states. [2021-01-26 14:44:27,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:27,088 INFO L276 IsEmpty]: Start isEmpty. Operand 3580 states. [2021-01-26 14:44:27,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-26 14:44:27,094 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:27,094 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:27,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-26 14:44:27,295 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:27,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:27,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1084722953, now seen corresponding path program 20 times [2021-01-26 14:44:27,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:27,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972051579] [2021-01-26 14:44:27,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:27,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972051579] [2021-01-26 14:44:27,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068743419] [2021-01-26 14:44:27,455 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 [2021-01-26 14:44:27,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:44:27,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:27,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:44:27,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:27,543 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:44:27,599 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:27,609 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:27,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:27,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-01-26 14:44:27,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766727973] [2021-01-26 14:44:27,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:44:27,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:27,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:44:27,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:44:27,614 INFO L87 Difference]: Start difference. First operand 3580 states. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:28,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:28,029 INFO L93 Difference]: Finished difference Result 3950 states and 9340 transitions. [2021-01-26 14:44:28,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-26 14:44:28,029 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-26 14:44:28,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:28,037 INFO L225 Difference]: With dead ends: 3950 [2021-01-26 14:44:28,038 INFO L226 Difference]: Without dead ends: 3680 [2021-01-26 14:44:28,039 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-01-26 14:44:28,039 INFO L78 Accepts]: Start accepts. Automaton has 3680 states. Word has length 61 [2021-01-26 14:44:28,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:28,039 INFO L481 AbstractCegarLoop]: Abstraction has 3680 states. [2021-01-26 14:44:28,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:28,040 INFO L276 IsEmpty]: Start isEmpty. Operand 3680 states. [2021-01-26 14:44:28,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-26 14:44:28,046 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:28,046 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:28,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:28,247 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:28,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:28,248 INFO L82 PathProgramCache]: Analyzing trace with hash 2120210981, now seen corresponding path program 21 times [2021-01-26 14:44:28,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:28,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497628283] [2021-01-26 14:44:28,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:28,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:28,393 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:28,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497628283] [2021-01-26 14:44:28,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182560249] [2021-01-26 14:44:28,394 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 [2021-01-26 14:44:28,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-26 14:44:28,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:28,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:44:28,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:28,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:28,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:28,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-26 14:44:28,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541717608] [2021-01-26 14:44:28,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-26 14:44:28,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:28,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-26 14:44:28,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-01-26 14:44:28,519 INFO L87 Difference]: Start difference. First operand 3680 states. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:28,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:29,000 INFO L93 Difference]: Finished difference Result 4000 states and 9440 transitions. [2021-01-26 14:44:29,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-26 14:44:29,001 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-26 14:44:29,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:29,010 INFO L225 Difference]: With dead ends: 4000 [2021-01-26 14:44:29,010 INFO L226 Difference]: Without dead ends: 3730 [2021-01-26 14:44:29,011 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-01-26 14:44:29,011 INFO L78 Accepts]: Start accepts. Automaton has 3730 states. Word has length 61 [2021-01-26 14:44:29,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:29,012 INFO L481 AbstractCegarLoop]: Abstraction has 3730 states. [2021-01-26 14:44:29,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:29,012 INFO L276 IsEmpty]: Start isEmpty. Operand 3730 states. [2021-01-26 14:44:29,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-26 14:44:29,020 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:29,020 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:29,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-26 14:44:29,234 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:29,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:29,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1255153419, now seen corresponding path program 22 times [2021-01-26 14:44:29,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:29,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744502980] [2021-01-26 14:44:29,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:29,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:29,390 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:29,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744502980] [2021-01-26 14:44:29,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041196198] [2021-01-26 14:44:29,391 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 [2021-01-26 14:44:29,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:44:29,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:29,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:44:29,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:29,486 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:44:29,520 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:29,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:29,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-01-26 14:44:29,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237166309] [2021-01-26 14:44:29,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:44:29,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:29,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:44:29,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:44:29,533 INFO L87 Difference]: Start difference. First operand 3730 states. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:30,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:30,085 INFO L93 Difference]: Finished difference Result 4434 states and 10564 transitions. [2021-01-26 14:44:30,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-26 14:44:30,086 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-26 14:44:30,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:30,092 INFO L225 Difference]: With dead ends: 4434 [2021-01-26 14:44:30,092 INFO L226 Difference]: Without dead ends: 3850 [2021-01-26 14:44:30,093 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-01-26 14:44:30,093 INFO L78 Accepts]: Start accepts. Automaton has 3850 states. Word has length 61 [2021-01-26 14:44:30,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:30,093 INFO L481 AbstractCegarLoop]: Abstraction has 3850 states. [2021-01-26 14:44:30,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:30,094 INFO L276 IsEmpty]: Start isEmpty. Operand 3850 states. [2021-01-26 14:44:30,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-26 14:44:30,099 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:30,100 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:30,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:30,300 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:30,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:30,301 INFO L82 PathProgramCache]: Analyzing trace with hash -903077501, now seen corresponding path program 23 times [2021-01-26 14:44:30,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:30,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797259170] [2021-01-26 14:44:30,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:30,426 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:30,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797259170] [2021-01-26 14:44:30,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866692725] [2021-01-26 14:44:30,427 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 [2021-01-26 14:44:30,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-26 14:44:30,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:30,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:44:30,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:30,531 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:30,538 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:30,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:30,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-26 14:44:30,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738256197] [2021-01-26 14:44:30,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-26 14:44:30,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:30,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-26 14:44:30,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-01-26 14:44:30,540 INFO L87 Difference]: Start difference. First operand 3850 states. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:30,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:30,949 INFO L93 Difference]: Finished difference Result 5322 states and 13094 transitions. [2021-01-26 14:44:30,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-26 14:44:30,949 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-26 14:44:30,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:30,957 INFO L225 Difference]: With dead ends: 5322 [2021-01-26 14:44:30,957 INFO L226 Difference]: Without dead ends: 5037 [2021-01-26 14:44:30,957 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2021-01-26 14:44:30,958 INFO L78 Accepts]: Start accepts. Automaton has 5037 states. Word has length 61 [2021-01-26 14:44:30,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:30,958 INFO L481 AbstractCegarLoop]: Abstraction has 5037 states. [2021-01-26 14:44:30,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:30,958 INFO L276 IsEmpty]: Start isEmpty. Operand 5037 states. [2021-01-26 14:44:30,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-26 14:44:30,965 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:30,966 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:31,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-26 14:44:31,167 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:31,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:31,168 INFO L82 PathProgramCache]: Analyzing trace with hash -906050731, now seen corresponding path program 24 times [2021-01-26 14:44:31,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:31,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647785916] [2021-01-26 14:44:31,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:31,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647785916] [2021-01-26 14:44:31,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100644170] [2021-01-26 14:44:31,315 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 [2021-01-26 14:44:31,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-26 14:44:31,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:31,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:44:31,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:31,426 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:44:31,442 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:31,453 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:31,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:31,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-26 14:44:31,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836124537] [2021-01-26 14:44:31,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-26 14:44:31,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:31,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-26 14:44:31,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-01-26 14:44:31,456 INFO L87 Difference]: Start difference. First operand 5037 states. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:32,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:32,026 INFO L93 Difference]: Finished difference Result 4589 states and 10891 transitions. [2021-01-26 14:44:32,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-26 14:44:32,027 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-26 14:44:32,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:32,033 INFO L225 Difference]: With dead ends: 4589 [2021-01-26 14:44:32,033 INFO L226 Difference]: Without dead ends: 4020 [2021-01-26 14:44:32,034 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=256, Invalid=674, Unknown=0, NotChecked=0, Total=930 [2021-01-26 14:44:32,034 INFO L78 Accepts]: Start accepts. Automaton has 4020 states. Word has length 61 [2021-01-26 14:44:32,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:32,035 INFO L481 AbstractCegarLoop]: Abstraction has 4020 states. [2021-01-26 14:44:32,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:32,035 INFO L276 IsEmpty]: Start isEmpty. Operand 4020 states. [2021-01-26 14:44:32,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-26 14:44:32,042 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:32,043 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:32,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:32,245 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:32,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:32,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1591649445, now seen corresponding path program 25 times [2021-01-26 14:44:32,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:32,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978949609] [2021-01-26 14:44:32,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:32,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:32,633 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 7 [2021-01-26 14:44:32,660 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:32,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978949609] [2021-01-26 14:44:32,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317268534] [2021-01-26 14:44:32,661 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 [2021-01-26 14:44:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:32,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:44:32,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:32,775 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:32,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:32,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-26 14:44:32,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334913439] [2021-01-26 14:44:32,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:44:32,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:32,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:44:32,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:44:32,787 INFO L87 Difference]: Start difference. First operand 4020 states. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:33,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:33,103 INFO L93 Difference]: Finished difference Result 4340 states and 10240 transitions. [2021-01-26 14:44:33,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-26 14:44:33,104 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-26 14:44:33,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:33,112 INFO L225 Difference]: With dead ends: 4340 [2021-01-26 14:44:33,112 INFO L226 Difference]: Without dead ends: 4070 [2021-01-26 14:44:33,113 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-01-26 14:44:33,113 INFO L78 Accepts]: Start accepts. Automaton has 4070 states. Word has length 66 [2021-01-26 14:44:33,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:33,113 INFO L481 AbstractCegarLoop]: Abstraction has 4070 states. [2021-01-26 14:44:33,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:33,114 INFO L276 IsEmpty]: Start isEmpty. Operand 4070 states. [2021-01-26 14:44:33,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-26 14:44:33,123 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:33,123 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:33,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-26 14:44:33,337 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:33,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:33,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1636009299, now seen corresponding path program 26 times [2021-01-26 14:44:33,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:33,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552972583] [2021-01-26 14:44:33,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:33,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552972583] [2021-01-26 14:44:33,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296780715] [2021-01-26 14:44:33,564 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 [2021-01-26 14:44:33,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:44:33,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:33,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:44:33,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:33,653 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:44:33,693 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:33,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:33,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-01-26 14:44:33,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715376604] [2021-01-26 14:44:33,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-26 14:44:33,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:33,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-26 14:44:33,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-01-26 14:44:33,710 INFO L87 Difference]: Start difference. First operand 4070 states. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:34,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:34,122 INFO L93 Difference]: Finished difference Result 4390 states and 10340 transitions. [2021-01-26 14:44:34,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-26 14:44:34,123 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-26 14:44:34,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:34,130 INFO L225 Difference]: With dead ends: 4390 [2021-01-26 14:44:34,131 INFO L226 Difference]: Without dead ends: 4120 [2021-01-26 14:44:34,131 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-01-26 14:44:34,131 INFO L78 Accepts]: Start accepts. Automaton has 4120 states. Word has length 66 [2021-01-26 14:44:34,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:34,132 INFO L481 AbstractCegarLoop]: Abstraction has 4120 states. [2021-01-26 14:44:34,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:34,132 INFO L276 IsEmpty]: Start isEmpty. Operand 4120 states. [2021-01-26 14:44:34,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-26 14:44:34,138 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:34,138 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:34,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:34,339 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:34,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:34,340 INFO L82 PathProgramCache]: Analyzing trace with hash -151192249, now seen corresponding path program 27 times [2021-01-26 14:44:34,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:34,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784384063] [2021-01-26 14:44:34,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:34,525 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:34,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784384063] [2021-01-26 14:44:34,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664097492] [2021-01-26 14:44:34,526 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 [2021-01-26 14:44:34,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-26 14:44:34,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:34,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:44:34,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:34,666 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:34,679 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:34,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:34,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-26 14:44:34,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408784005] [2021-01-26 14:44:34,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:44:34,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:34,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:44:34,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:44:34,689 INFO L87 Difference]: Start difference. First operand 4120 states. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:35,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:35,025 INFO L93 Difference]: Finished difference Result 4440 states and 10440 transitions. [2021-01-26 14:44:35,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-26 14:44:35,026 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-26 14:44:35,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:35,035 INFO L225 Difference]: With dead ends: 4440 [2021-01-26 14:44:35,035 INFO L226 Difference]: Without dead ends: 4170 [2021-01-26 14:44:35,036 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-01-26 14:44:35,037 INFO L78 Accepts]: Start accepts. Automaton has 4170 states. Word has length 66 [2021-01-26 14:44:35,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:35,037 INFO L481 AbstractCegarLoop]: Abstraction has 4170 states. [2021-01-26 14:44:35,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:35,038 INFO L276 IsEmpty]: Start isEmpty. Operand 4170 states. [2021-01-26 14:44:35,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-26 14:44:35,046 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:35,047 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:35,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-26 14:44:35,261 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:35,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:35,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1070514199, now seen corresponding path program 28 times [2021-01-26 14:44:35,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:35,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757682613] [2021-01-26 14:44:35,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:35,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:35,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757682613] [2021-01-26 14:44:35,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887597759] [2021-01-26 14:44:35,428 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 [2021-01-26 14:44:35,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:44:35,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:35,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-26 14:44:35,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:35,521 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:44:35,565 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:35,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:35,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-01-26 14:44:35,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289137088] [2021-01-26 14:44:35,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-26 14:44:35,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:35,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-26 14:44:35,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-01-26 14:44:35,587 INFO L87 Difference]: Start difference. First operand 4170 states. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:36,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:36,180 INFO L93 Difference]: Finished difference Result 4490 states and 10540 transitions. [2021-01-26 14:44:36,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-26 14:44:36,181 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-26 14:44:36,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:36,187 INFO L225 Difference]: With dead ends: 4490 [2021-01-26 14:44:36,188 INFO L226 Difference]: Without dead ends: 4220 [2021-01-26 14:44:36,188 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-01-26 14:44:36,188 INFO L78 Accepts]: Start accepts. Automaton has 4220 states. Word has length 66 [2021-01-26 14:44:36,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:36,189 INFO L481 AbstractCegarLoop]: Abstraction has 4220 states. [2021-01-26 14:44:36,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:36,189 INFO L276 IsEmpty]: Start isEmpty. Operand 4220 states. [2021-01-26 14:44:36,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-26 14:44:36,194 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:36,194 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:36,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-26 14:44:36,397 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:36,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:36,398 INFO L82 PathProgramCache]: Analyzing trace with hash -19519163, now seen corresponding path program 29 times [2021-01-26 14:44:36,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:36,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774175514] [2021-01-26 14:44:36,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:36,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:36,555 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:36,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774175514] [2021-01-26 14:44:36,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832866132] [2021-01-26 14:44:36,556 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 [2021-01-26 14:44:36,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-26 14:44:36,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:36,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:44:36,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:36,665 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:36,678 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:36,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:36,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-26 14:44:36,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005119566] [2021-01-26 14:44:36,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:44:36,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:36,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:44:36,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:44:36,681 INFO L87 Difference]: Start difference. First operand 4220 states. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:37,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:37,098 INFO L93 Difference]: Finished difference Result 4540 states and 10640 transitions. [2021-01-26 14:44:37,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-26 14:44:37,099 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-26 14:44:37,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:37,108 INFO L225 Difference]: With dead ends: 4540 [2021-01-26 14:44:37,109 INFO L226 Difference]: Without dead ends: 4270 [2021-01-26 14:44:37,110 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-01-26 14:44:37,111 INFO L78 Accepts]: Start accepts. Automaton has 4270 states. Word has length 66 [2021-01-26 14:44:37,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:37,111 INFO L481 AbstractCegarLoop]: Abstraction has 4270 states. [2021-01-26 14:44:37,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:37,112 INFO L276 IsEmpty]: Start isEmpty. Operand 4270 states. [2021-01-26 14:44:37,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-26 14:44:37,121 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:37,121 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:37,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-26 14:44:37,336 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:37,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:37,337 INFO L82 PathProgramCache]: Analyzing trace with hash 900083733, now seen corresponding path program 30 times [2021-01-26 14:44:37,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:37,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443774476] [2021-01-26 14:44:37,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:37,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:37,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443774476] [2021-01-26 14:44:37,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772464940] [2021-01-26 14:44:37,493 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 [2021-01-26 14:44:37,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-26 14:44:37,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:37,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:44:37,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:37,594 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:44:37,641 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:37,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:37,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-01-26 14:44:37,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391521909] [2021-01-26 14:44:37,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-26 14:44:37,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:37,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-26 14:44:37,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-01-26 14:44:37,653 INFO L87 Difference]: Start difference. First operand 4270 states. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:38,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:38,297 INFO L93 Difference]: Finished difference Result 4974 states and 11764 transitions. [2021-01-26 14:44:38,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-26 14:44:38,298 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-26 14:44:38,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:38,309 INFO L225 Difference]: With dead ends: 4974 [2021-01-26 14:44:38,309 INFO L226 Difference]: Without dead ends: 4390 [2021-01-26 14:44:38,310 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2021-01-26 14:44:38,310 INFO L78 Accepts]: Start accepts. Automaton has 4390 states. Word has length 66 [2021-01-26 14:44:38,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:38,311 INFO L481 AbstractCegarLoop]: Abstraction has 4390 states. [2021-01-26 14:44:38,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:38,311 INFO L276 IsEmpty]: Start isEmpty. Operand 4390 states. [2021-01-26 14:44:38,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-26 14:44:38,319 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:38,319 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:38,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-26 14:44:38,535 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:38,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:38,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1252159651, now seen corresponding path program 31 times [2021-01-26 14:44:38,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:38,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128716404] [2021-01-26 14:44:38,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:38,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:38,721 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:38,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128716404] [2021-01-26 14:44:38,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452682309] [2021-01-26 14:44:38,722 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 [2021-01-26 14:44:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:38,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:44:38,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:38,847 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:38,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:38,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-26 14:44:38,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333078804] [2021-01-26 14:44:38,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:44:38,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:38,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:44:38,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:44:38,860 INFO L87 Difference]: Start difference. First operand 4390 states. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:39,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:39,297 INFO L93 Difference]: Finished difference Result 5862 states and 14294 transitions. [2021-01-26 14:44:39,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-26 14:44:39,298 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-26 14:44:39,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:39,309 INFO L225 Difference]: With dead ends: 5862 [2021-01-26 14:44:39,310 INFO L226 Difference]: Without dead ends: 5577 [2021-01-26 14:44:39,310 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-01-26 14:44:39,310 INFO L78 Accepts]: Start accepts. Automaton has 5577 states. Word has length 66 [2021-01-26 14:44:39,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:39,311 INFO L481 AbstractCegarLoop]: Abstraction has 5577 states. [2021-01-26 14:44:39,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:39,311 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states. [2021-01-26 14:44:39,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-26 14:44:39,318 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:39,319 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:39,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:39,533 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:39,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:39,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1249186421, now seen corresponding path program 32 times [2021-01-26 14:44:39,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:39,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437785338] [2021-01-26 14:44:39,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:39,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437785338] [2021-01-26 14:44:39,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805339820] [2021-01-26 14:44:39,830 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 [2021-01-26 14:44:39,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:44:39,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:39,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:44:39,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:39,936 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:44:39,950 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:39,966 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:39,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:39,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-26 14:44:39,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839839621] [2021-01-26 14:44:39,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:44:39,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:39,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:44:39,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:44:39,970 INFO L87 Difference]: Start difference. First operand 5577 states. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:40,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:40,635 INFO L93 Difference]: Finished difference Result 5129 states and 12091 transitions. [2021-01-26 14:44:40,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-26 14:44:40,635 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-26 14:44:40,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:40,643 INFO L225 Difference]: With dead ends: 5129 [2021-01-26 14:44:40,643 INFO L226 Difference]: Without dead ends: 4560 [2021-01-26 14:44:40,644 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2021-01-26 14:44:40,644 INFO L78 Accepts]: Start accepts. Automaton has 4560 states. Word has length 66 [2021-01-26 14:44:40,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:40,645 INFO L481 AbstractCegarLoop]: Abstraction has 4560 states. [2021-01-26 14:44:40,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:40,645 INFO L276 IsEmpty]: Start isEmpty. Operand 4560 states. [2021-01-26 14:44:40,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-26 14:44:40,652 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:40,652 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:40,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-26 14:44:40,854 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:40,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:40,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1334750316, now seen corresponding path program 33 times [2021-01-26 14:44:40,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:40,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987048306] [2021-01-26 14:44:40,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:40,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:41,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987048306] [2021-01-26 14:44:41,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480095438] [2021-01-26 14:44:41,092 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 [2021-01-26 14:44:41,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-26 14:44:41,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:41,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:44:41,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:41,202 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:41,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:41,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-26 14:44:41,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051509872] [2021-01-26 14:44:41,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:44:41,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:41,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:44:41,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:44:41,231 INFO L87 Difference]: Start difference. First operand 4560 states. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:41,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:41,546 INFO L93 Difference]: Finished difference Result 4880 states and 11440 transitions. [2021-01-26 14:44:41,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-26 14:44:41,546 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-26 14:44:41,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:41,554 INFO L225 Difference]: With dead ends: 4880 [2021-01-26 14:44:41,554 INFO L226 Difference]: Without dead ends: 4610 [2021-01-26 14:44:41,555 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-01-26 14:44:41,555 INFO L78 Accepts]: Start accepts. Automaton has 4610 states. Word has length 71 [2021-01-26 14:44:41,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:41,555 INFO L481 AbstractCegarLoop]: Abstraction has 4610 states. [2021-01-26 14:44:41,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:41,556 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states. [2021-01-26 14:44:41,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-26 14:44:41,564 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:41,564 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:41,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-26 14:44:41,765 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:41,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:41,766 INFO L82 PathProgramCache]: Analyzing trace with hash -99594946, now seen corresponding path program 34 times [2021-01-26 14:44:41,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:41,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719921754] [2021-01-26 14:44:41,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:41,991 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:41,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719921754] [2021-01-26 14:44:41,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377365446] [2021-01-26 14:44:41,991 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 [2021-01-26 14:44:42,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:44:42,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:42,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:44:42,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:42,095 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:44:42,116 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:42,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:42,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-26 14:44:42,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080007877] [2021-01-26 14:44:42,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-26 14:44:42,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:42,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-26 14:44:42,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-01-26 14:44:42,135 INFO L87 Difference]: Start difference. First operand 4610 states. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:42,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:42,560 INFO L93 Difference]: Finished difference Result 4930 states and 11540 transitions. [2021-01-26 14:44:42,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-26 14:44:42,561 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-26 14:44:42,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:42,571 INFO L225 Difference]: With dead ends: 4930 [2021-01-26 14:44:42,571 INFO L226 Difference]: Without dead ends: 4660 [2021-01-26 14:44:42,571 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-01-26 14:44:42,571 INFO L78 Accepts]: Start accepts. Automaton has 4660 states. Word has length 71 [2021-01-26 14:44:42,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:42,572 INFO L481 AbstractCegarLoop]: Abstraction has 4660 states. [2021-01-26 14:44:42,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:42,572 INFO L276 IsEmpty]: Start isEmpty. Operand 4660 states. [2021-01-26 14:44:42,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-26 14:44:42,581 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:42,582 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:42,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:42,798 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:42,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:42,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1726601048, now seen corresponding path program 35 times [2021-01-26 14:44:42,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:42,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608063372] [2021-01-26 14:44:42,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:42,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608063372] [2021-01-26 14:44:42,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875855149] [2021-01-26 14:44:42,976 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 [2021-01-26 14:44:43,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-26 14:44:43,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:43,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:44:43,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:43,060 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:43,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:43,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-26 14:44:43,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212319220] [2021-01-26 14:44:43,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:44:43,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:43,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:44:43,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:44:43,074 INFO L87 Difference]: Start difference. First operand 4660 states. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:43,351 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-01-26 14:44:43,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:43,547 INFO L93 Difference]: Finished difference Result 4980 states and 11640 transitions. [2021-01-26 14:44:43,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-26 14:44:43,547 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-26 14:44:43,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:43,558 INFO L225 Difference]: With dead ends: 4980 [2021-01-26 14:44:43,559 INFO L226 Difference]: Without dead ends: 4710 [2021-01-26 14:44:43,560 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2021-01-26 14:44:43,560 INFO L78 Accepts]: Start accepts. Automaton has 4710 states. Word has length 71 [2021-01-26 14:44:43,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:43,561 INFO L481 AbstractCegarLoop]: Abstraction has 4710 states. [2021-01-26 14:44:43,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:43,562 INFO L276 IsEmpty]: Start isEmpty. Operand 4710 states. [2021-01-26 14:44:43,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-26 14:44:43,572 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:43,572 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:43,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-01-26 14:44:43,788 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:43,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:43,788 INFO L82 PathProgramCache]: Analyzing trace with hash -406694360, now seen corresponding path program 36 times [2021-01-26 14:44:43,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:43,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975623774] [2021-01-26 14:44:43,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:43,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:43,993 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:43,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975623774] [2021-01-26 14:44:43,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116153252] [2021-01-26 14:44:43,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:44,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-26 14:44:44,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:44,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:44:44,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:44,093 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:44:44,107 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:44,123 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:44,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:44,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-26 14:44:44,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943739164] [2021-01-26 14:44:44,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-26 14:44:44,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:44,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-26 14:44:44,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-01-26 14:44:44,126 INFO L87 Difference]: Start difference. First operand 4710 states. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:44,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:44,588 INFO L93 Difference]: Finished difference Result 5080 states and 11840 transitions. [2021-01-26 14:44:44,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-26 14:44:44,589 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-26 14:44:44,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:44,594 INFO L225 Difference]: With dead ends: 5080 [2021-01-26 14:44:44,594 INFO L226 Difference]: Without dead ends: 4810 [2021-01-26 14:44:44,595 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-01-26 14:44:44,595 INFO L78 Accepts]: Start accepts. Automaton has 4810 states. Word has length 71 [2021-01-26 14:44:44,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:44,595 INFO L481 AbstractCegarLoop]: Abstraction has 4810 states. [2021-01-26 14:44:44,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:44,595 INFO L276 IsEmpty]: Start isEmpty. Operand 4810 states. [2021-01-26 14:44:44,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-26 14:44:44,600 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:44,601 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:44,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:44,815 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:44,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:44,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1483906518, now seen corresponding path program 37 times [2021-01-26 14:44:44,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:44,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730270049] [2021-01-26 14:44:44,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:44,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730270049] [2021-01-26 14:44:44,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975213205] [2021-01-26 14:44:44,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:45,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:44:45,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:45,038 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:45,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:45,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-26 14:44:45,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536193965] [2021-01-26 14:44:45,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:44:45,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:45,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:44:45,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:44:45,047 INFO L87 Difference]: Start difference. First operand 4810 states. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:45,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:45,483 INFO L93 Difference]: Finished difference Result 5130 states and 11940 transitions. [2021-01-26 14:44:45,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-26 14:44:45,484 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-26 14:44:45,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:45,493 INFO L225 Difference]: With dead ends: 5130 [2021-01-26 14:44:45,494 INFO L226 Difference]: Without dead ends: 4860 [2021-01-26 14:44:45,494 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2021-01-26 14:44:45,495 INFO L78 Accepts]: Start accepts. Automaton has 4860 states. Word has length 71 [2021-01-26 14:44:45,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:45,495 INFO L481 AbstractCegarLoop]: Abstraction has 4860 states. [2021-01-26 14:44:45,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:45,496 INFO L276 IsEmpty]: Start isEmpty. Operand 4860 states. [2021-01-26 14:44:45,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-26 14:44:45,502 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:45,502 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:45,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-26 14:44:45,703 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:45,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:45,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1589354330, now seen corresponding path program 38 times [2021-01-26 14:44:45,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:45,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568600553] [2021-01-26 14:44:45,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:45,883 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:45,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568600553] [2021-01-26 14:44:45,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303275019] [2021-01-26 14:44:45,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:45,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:44:45,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:45,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:44:45,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:45,974 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:44:45,988 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:45,998 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:45,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:45,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-26 14:44:45,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367194472] [2021-01-26 14:44:45,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-26 14:44:45,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:45,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-26 14:44:46,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-01-26 14:44:46,000 INFO L87 Difference]: Start difference. First operand 4860 states. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:46,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:46,550 INFO L93 Difference]: Finished difference Result 5180 states and 12040 transitions. [2021-01-26 14:44:46,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-26 14:44:46,551 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-26 14:44:46,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:46,558 INFO L225 Difference]: With dead ends: 5180 [2021-01-26 14:44:46,558 INFO L226 Difference]: Without dead ends: 4910 [2021-01-26 14:44:46,559 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2021-01-26 14:44:46,559 INFO L78 Accepts]: Start accepts. Automaton has 4910 states. Word has length 71 [2021-01-26 14:44:46,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:46,560 INFO L481 AbstractCegarLoop]: Abstraction has 4910 states. [2021-01-26 14:44:46,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:46,560 INFO L276 IsEmpty]: Start isEmpty. Operand 4910 states. [2021-01-26 14:44:46,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-26 14:44:46,567 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:46,567 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:46,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:46,782 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:46,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:46,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1615579604, now seen corresponding path program 39 times [2021-01-26 14:44:46,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:46,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437573603] [2021-01-26 14:44:46,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:46,952 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:46,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437573603] [2021-01-26 14:44:46,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112740939] [2021-01-26 14:44:46,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:47,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-26 14:44:47,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:47,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:44:47,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:47,158 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:47,174 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:47,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:47,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-26 14:44:47,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905594105] [2021-01-26 14:44:47,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:44:47,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:47,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:44:47,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:44:47,179 INFO L87 Difference]: Start difference. First operand 4910 states. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:47,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:47,650 INFO L93 Difference]: Finished difference Result 5230 states and 12140 transitions. [2021-01-26 14:44:47,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-26 14:44:47,651 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-26 14:44:47,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:47,658 INFO L225 Difference]: With dead ends: 5230 [2021-01-26 14:44:47,659 INFO L226 Difference]: Without dead ends: 4960 [2021-01-26 14:44:47,660 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-01-26 14:44:47,660 INFO L78 Accepts]: Start accepts. Automaton has 4960 states. Word has length 71 [2021-01-26 14:44:47,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:47,661 INFO L481 AbstractCegarLoop]: Abstraction has 4960 states. [2021-01-26 14:44:47,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:47,661 INFO L276 IsEmpty]: Start isEmpty. Operand 4960 states. [2021-01-26 14:44:47,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-26 14:44:47,667 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:47,667 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:47,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-26 14:44:47,868 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:47,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:47,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1759784796, now seen corresponding path program 40 times [2021-01-26 14:44:47,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:47,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948875664] [2021-01-26 14:44:47,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:47,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:48,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948875664] [2021-01-26 14:44:48,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892657122] [2021-01-26 14:44:48,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:48,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:44:48,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:48,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-26 14:44:48,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:48,138 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:44:48,153 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:48,163 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:48,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:48,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-26 14:44:48,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277126560] [2021-01-26 14:44:48,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-26 14:44:48,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:48,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-26 14:44:48,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-01-26 14:44:48,165 INFO L87 Difference]: Start difference. First operand 4960 states. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:48,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:48,840 INFO L93 Difference]: Finished difference Result 5320 states and 12320 transitions. [2021-01-26 14:44:48,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-26 14:44:48,841 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-26 14:44:48,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:48,851 INFO L225 Difference]: With dead ends: 5320 [2021-01-26 14:44:48,851 INFO L226 Difference]: Without dead ends: 5050 [2021-01-26 14:44:48,852 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=301, Invalid=889, Unknown=0, NotChecked=0, Total=1190 [2021-01-26 14:44:48,852 INFO L78 Accepts]: Start accepts. Automaton has 5050 states. Word has length 71 [2021-01-26 14:44:48,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:48,853 INFO L481 AbstractCegarLoop]: Abstraction has 5050 states. [2021-01-26 14:44:48,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:48,853 INFO L276 IsEmpty]: Start isEmpty. Operand 5050 states. [2021-01-26 14:44:48,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-26 14:44:48,861 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:48,861 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:49,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-26 14:44:49,077 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:49,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:49,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1407708878, now seen corresponding path program 41 times [2021-01-26 14:44:49,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:49,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560534990] [2021-01-26 14:44:49,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:49,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:49,243 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:49,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560534990] [2021-01-26 14:44:49,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842222989] [2021-01-26 14:44:49,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:49,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-26 14:44:49,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:49,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:44:49,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:49,338 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:49,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:49,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-26 14:44:49,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885930941] [2021-01-26 14:44:49,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:44:49,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:49,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:44:49,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:44:49,352 INFO L87 Difference]: Start difference. First operand 5050 states. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:49,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:49,912 INFO L93 Difference]: Finished difference Result 6522 states and 15684 transitions. [2021-01-26 14:44:49,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-26 14:44:49,913 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-26 14:44:49,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:49,928 INFO L225 Difference]: With dead ends: 6522 [2021-01-26 14:44:49,928 INFO L226 Difference]: Without dead ends: 6252 [2021-01-26 14:44:49,929 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=340, Invalid=850, Unknown=0, NotChecked=0, Total=1190 [2021-01-26 14:44:49,930 INFO L78 Accepts]: Start accepts. Automaton has 6252 states. Word has length 71 [2021-01-26 14:44:49,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:49,930 INFO L481 AbstractCegarLoop]: Abstraction has 6252 states. [2021-01-26 14:44:49,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:49,931 INFO L276 IsEmpty]: Start isEmpty. Operand 6252 states. [2021-01-26 14:44:49,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-26 14:44:49,941 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:49,941 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:50,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:50,151 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:50,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:50,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1410682108, now seen corresponding path program 42 times [2021-01-26 14:44:50,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:50,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471238557] [2021-01-26 14:44:50,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:50,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:50,297 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:50,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471238557] [2021-01-26 14:44:50,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350900808] [2021-01-26 14:44:50,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:50,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-26 14:44:50,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:50,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:44:50,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:50,396 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:44:50,407 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:50,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:50,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-26 14:44:50,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504505263] [2021-01-26 14:44:50,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-26 14:44:50,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:50,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-26 14:44:50,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-01-26 14:44:50,416 INFO L87 Difference]: Start difference. First operand 6252 states. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:51,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:51,095 INFO L93 Difference]: Finished difference Result 5804 states and 13526 transitions. [2021-01-26 14:44:51,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-26 14:44:51,096 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-26 14:44:51,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:51,104 INFO L225 Difference]: With dead ends: 5804 [2021-01-26 14:44:51,104 INFO L226 Difference]: Without dead ends: 5265 [2021-01-26 14:44:51,105 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-01-26 14:44:51,105 INFO L78 Accepts]: Start accepts. Automaton has 5265 states. Word has length 71 [2021-01-26 14:44:51,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:51,105 INFO L481 AbstractCegarLoop]: Abstraction has 5265 states. [2021-01-26 14:44:51,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:51,105 INFO L276 IsEmpty]: Start isEmpty. Operand 5265 states. [2021-01-26 14:44:51,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-26 14:44:51,111 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:51,111 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:51,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-01-26 14:44:51,312 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:51,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:51,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1682215820, now seen corresponding path program 43 times [2021-01-26 14:44:51,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:51,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883756888] [2021-01-26 14:44:51,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:51,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883756888] [2021-01-26 14:44:51,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121486616] [2021-01-26 14:44:51,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:51,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:51,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-26 14:44:51,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:51,619 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:51,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:51,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-01-26 14:44:51,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94583929] [2021-01-26 14:44:51,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-26 14:44:51,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:51,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-26 14:44:51,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-01-26 14:44:51,638 INFO L87 Difference]: Start difference. First operand 5265 states. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:52,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:52,097 INFO L93 Difference]: Finished difference Result 5585 states and 12950 transitions. [2021-01-26 14:44:52,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-26 14:44:52,098 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-01-26 14:44:52,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:52,105 INFO L225 Difference]: With dead ends: 5585 [2021-01-26 14:44:52,106 INFO L226 Difference]: Without dead ends: 5315 [2021-01-26 14:44:52,106 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=560, Unknown=0, NotChecked=0, Total=756 [2021-01-26 14:44:52,106 INFO L78 Accepts]: Start accepts. Automaton has 5315 states. Word has length 76 [2021-01-26 14:44:52,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:52,107 INFO L481 AbstractCegarLoop]: Abstraction has 5315 states. [2021-01-26 14:44:52,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:52,107 INFO L276 IsEmpty]: Start isEmpty. Operand 5315 states. [2021-01-26 14:44:52,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-26 14:44:52,116 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:52,116 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:52,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:52,331 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:52,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:52,332 INFO L82 PathProgramCache]: Analyzing trace with hash 247870558, now seen corresponding path program 44 times [2021-01-26 14:44:52,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:52,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543879956] [2021-01-26 14:44:52,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:52,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:52,549 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:52,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543879956] [2021-01-26 14:44:52,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498587610] [2021-01-26 14:44:52,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:52,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:44:52,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:52,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-26 14:44:52,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:52,635 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:44:52,652 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:52,662 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:52,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:52,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-26 14:44:52,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135652963] [2021-01-26 14:44:52,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:44:52,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:52,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:44:52,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:44:52,665 INFO L87 Difference]: Start difference. First operand 5315 states. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:53,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:53,141 INFO L93 Difference]: Finished difference Result 5635 states and 13050 transitions. [2021-01-26 14:44:53,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-26 14:44:53,142 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-26 14:44:53,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:53,152 INFO L225 Difference]: With dead ends: 5635 [2021-01-26 14:44:53,152 INFO L226 Difference]: Without dead ends: 5365 [2021-01-26 14:44:53,152 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-01-26 14:44:53,152 INFO L78 Accepts]: Start accepts. Automaton has 5365 states. Word has length 76 [2021-01-26 14:44:53,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:53,153 INFO L481 AbstractCegarLoop]: Abstraction has 5365 states. [2021-01-26 14:44:53,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:53,153 INFO L276 IsEmpty]: Start isEmpty. Operand 5365 states. [2021-01-26 14:44:53,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-26 14:44:53,160 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:53,160 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:53,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:53,361 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:53,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:53,362 INFO L82 PathProgramCache]: Analyzing trace with hash 2074066552, now seen corresponding path program 45 times [2021-01-26 14:44:53,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:53,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000249907] [2021-01-26 14:44:53,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:53,580 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:53,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000249907] [2021-01-26 14:44:53,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749873884] [2021-01-26 14:44:53,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:53,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-26 14:44:53,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:53,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-26 14:44:53,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:53,683 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:53,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:53,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-01-26 14:44:53,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055702416] [2021-01-26 14:44:53,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-26 14:44:53,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:53,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-26 14:44:53,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-01-26 14:44:53,699 INFO L87 Difference]: Start difference. First operand 5365 states. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:54,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:54,103 INFO L93 Difference]: Finished difference Result 5685 states and 13150 transitions. [2021-01-26 14:44:54,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-26 14:44:54,104 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-01-26 14:44:54,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:54,113 INFO L225 Difference]: With dead ends: 5685 [2021-01-26 14:44:54,113 INFO L226 Difference]: Without dead ends: 5415 [2021-01-26 14:44:54,114 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-01-26 14:44:54,114 INFO L78 Accepts]: Start accepts. Automaton has 5415 states. Word has length 76 [2021-01-26 14:44:54,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:54,115 INFO L481 AbstractCegarLoop]: Abstraction has 5415 states. [2021-01-26 14:44:54,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:54,115 INFO L276 IsEmpty]: Start isEmpty. Operand 5415 states. [2021-01-26 14:44:54,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-26 14:44:54,125 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:54,125 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:54,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-26 14:44:54,329 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:54,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:54,330 INFO L82 PathProgramCache]: Analyzing trace with hash -59228856, now seen corresponding path program 46 times [2021-01-26 14:44:54,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:54,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095479790] [2021-01-26 14:44:54,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:54,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:54,535 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:54,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095479790] [2021-01-26 14:44:54,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971317545] [2021-01-26 14:44:54,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:54,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:44:54,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:54,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-26 14:44:54,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:54,669 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:44:54,688 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:54,706 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:54,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:54,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-26 14:44:54,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116218655] [2021-01-26 14:44:54,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:44:54,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:54,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:44:54,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:44:54,708 INFO L87 Difference]: Start difference. First operand 5415 states. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:55,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:55,255 INFO L93 Difference]: Finished difference Result 5735 states and 13250 transitions. [2021-01-26 14:44:55,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-26 14:44:55,255 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-26 14:44:55,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:55,265 INFO L225 Difference]: With dead ends: 5735 [2021-01-26 14:44:55,265 INFO L226 Difference]: Without dead ends: 5465 [2021-01-26 14:44:55,266 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2021-01-26 14:44:55,266 INFO L78 Accepts]: Start accepts. Automaton has 5465 states. Word has length 76 [2021-01-26 14:44:55,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:55,266 INFO L481 AbstractCegarLoop]: Abstraction has 5465 states. [2021-01-26 14:44:55,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:55,267 INFO L276 IsEmpty]: Start isEmpty. Operand 5465 states. [2021-01-26 14:44:55,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-26 14:44:55,273 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:55,273 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:55,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:55,474 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:55,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:55,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1831372022, now seen corresponding path program 47 times [2021-01-26 14:44:55,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:55,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976935120] [2021-01-26 14:44:55,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:55,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:55,662 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:55,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976935120] [2021-01-26 14:44:55,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319981641] [2021-01-26 14:44:55,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:55,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-26 14:44:55,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:55,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-26 14:44:55,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:55,749 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:55,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:55,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-01-26 14:44:55,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792507533] [2021-01-26 14:44:55,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-26 14:44:55,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:55,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-26 14:44:55,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-01-26 14:44:55,761 INFO L87 Difference]: Start difference. First operand 5465 states. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:56,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:56,204 INFO L93 Difference]: Finished difference Result 5785 states and 13350 transitions. [2021-01-26 14:44:56,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-26 14:44:56,205 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-01-26 14:44:56,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:56,210 INFO L225 Difference]: With dead ends: 5785 [2021-01-26 14:44:56,210 INFO L226 Difference]: Without dead ends: 5515 [2021-01-26 14:44:56,211 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2021-01-26 14:44:56,211 INFO L78 Accepts]: Start accepts. Automaton has 5515 states. Word has length 76 [2021-01-26 14:44:56,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:56,211 INFO L481 AbstractCegarLoop]: Abstraction has 5515 states. [2021-01-26 14:44:56,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:56,211 INFO L276 IsEmpty]: Start isEmpty. Operand 5515 states. [2021-01-26 14:44:56,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-26 14:44:56,215 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:56,215 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:56,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-01-26 14:44:56,416 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:56,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:56,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1241888826, now seen corresponding path program 48 times [2021-01-26 14:44:56,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:56,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694878101] [2021-01-26 14:44:56,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:56,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:56,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694878101] [2021-01-26 14:44:56,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372118315] [2021-01-26 14:44:56,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:56,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-26 14:44:56,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:56,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-26 14:44:56,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:56,800 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:44:56,816 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:56,833 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:56,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:56,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-26 14:44:56,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711399023] [2021-01-26 14:44:56,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:44:56,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:56,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:44:56,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:44:56,835 INFO L87 Difference]: Start difference. First operand 5515 states. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:57,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:57,468 INFO L93 Difference]: Finished difference Result 5835 states and 13450 transitions. [2021-01-26 14:44:57,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-26 14:44:57,469 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-26 14:44:57,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:57,476 INFO L225 Difference]: With dead ends: 5835 [2021-01-26 14:44:57,476 INFO L226 Difference]: Without dead ends: 5565 [2021-01-26 14:44:57,477 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2021-01-26 14:44:57,477 INFO L78 Accepts]: Start accepts. Automaton has 5565 states. Word has length 76 [2021-01-26 14:44:57,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:57,477 INFO L481 AbstractCegarLoop]: Abstraction has 5565 states. [2021-01-26 14:44:57,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:57,477 INFO L276 IsEmpty]: Start isEmpty. Operand 5565 states. [2021-01-26 14:44:57,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-26 14:44:57,485 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:57,486 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:57,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-01-26 14:44:57,700 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:57,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:57,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1963045108, now seen corresponding path program 49 times [2021-01-26 14:44:57,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:57,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133824145] [2021-01-26 14:44:57,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:57,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133824145] [2021-01-26 14:44:57,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961863375] [2021-01-26 14:44:57,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:57,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:57,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-26 14:44:57,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:57,952 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:57,963 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:57,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:57,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-01-26 14:44:57,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196238686] [2021-01-26 14:44:57,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-26 14:44:57,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:57,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-26 14:44:57,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-01-26 14:44:57,965 INFO L87 Difference]: Start difference. First operand 5565 states. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:58,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:58,493 INFO L93 Difference]: Finished difference Result 5885 states and 13550 transitions. [2021-01-26 14:44:58,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-26 14:44:58,494 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-01-26 14:44:58,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:58,501 INFO L225 Difference]: With dead ends: 5885 [2021-01-26 14:44:58,501 INFO L226 Difference]: Without dead ends: 5615 [2021-01-26 14:44:58,502 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2021-01-26 14:44:58,502 INFO L78 Accepts]: Start accepts. Automaton has 5615 states. Word has length 76 [2021-01-26 14:44:58,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:58,502 INFO L481 AbstractCegarLoop]: Abstraction has 5615 states. [2021-01-26 14:44:58,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:58,502 INFO L276 IsEmpty]: Start isEmpty. Operand 5615 states. [2021-01-26 14:44:58,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-26 14:44:58,509 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:58,509 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:44:58,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-01-26 14:44:58,710 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:44:58,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:44:58,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1412319292, now seen corresponding path program 50 times [2021-01-26 14:44:58,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:44:58,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723586770] [2021-01-26 14:44:58,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:44:58,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:44:58,885 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:58,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723586770] [2021-01-26 14:44:58,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649321908] [2021-01-26 14:44:58,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:44:58,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:44:58,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:44:58,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-26 14:44:58,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:44:59,008 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:44:59,027 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:44:59,049 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:44:59,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:44:59,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-26 14:44:59,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397849402] [2021-01-26 14:44:59,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:44:59,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:44:59,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:44:59,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:44:59,052 INFO L87 Difference]: Start difference. First operand 5615 states. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:59,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:44:59,789 INFO L93 Difference]: Finished difference Result 5975 states and 13730 transitions. [2021-01-26 14:44:59,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-26 14:44:59,790 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-26 14:44:59,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:44:59,798 INFO L225 Difference]: With dead ends: 5975 [2021-01-26 14:44:59,798 INFO L226 Difference]: Without dead ends: 5705 [2021-01-26 14:44:59,798 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2021-01-26 14:44:59,799 INFO L78 Accepts]: Start accepts. Automaton has 5705 states. Word has length 76 [2021-01-26 14:44:59,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:44:59,799 INFO L481 AbstractCegarLoop]: Abstraction has 5705 states. [2021-01-26 14:44:59,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:44:59,799 INFO L276 IsEmpty]: Start isEmpty. Operand 5705 states. [2021-01-26 14:44:59,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-26 14:44:59,804 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:44:59,805 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:45:00,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-26 14:45:00,006 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:45:00,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:45:00,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1060243374, now seen corresponding path program 51 times [2021-01-26 14:45:00,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:45:00,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845319162] [2021-01-26 14:45:00,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:45:00,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:45:00,145 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:45:00,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845319162] [2021-01-26 14:45:00,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423135133] [2021-01-26 14:45:00,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:45:00,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-26 14:45:00,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:45:00,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-26 14:45:00,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:45:00,236 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:45:00,243 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:45:00,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:45:00,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-01-26 14:45:00,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315246553] [2021-01-26 14:45:00,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-26 14:45:00,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:45:00,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-26 14:45:00,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-01-26 14:45:00,244 INFO L87 Difference]: Start difference. First operand 5705 states. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:45:00,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:45:00,752 INFO L93 Difference]: Finished difference Result 7177 states and 17094 transitions. [2021-01-26 14:45:00,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-26 14:45:00,753 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-01-26 14:45:00,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:45:00,761 INFO L225 Difference]: With dead ends: 7177 [2021-01-26 14:45:00,761 INFO L226 Difference]: Without dead ends: 6907 [2021-01-26 14:45:00,761 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2021-01-26 14:45:00,761 INFO L78 Accepts]: Start accepts. Automaton has 6907 states. Word has length 76 [2021-01-26 14:45:00,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:45:00,762 INFO L481 AbstractCegarLoop]: Abstraction has 6907 states. [2021-01-26 14:45:00,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:45:00,762 INFO L276 IsEmpty]: Start isEmpty. Operand 6907 states. [2021-01-26 14:45:00,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-26 14:45:00,767 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:45:00,767 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:45:00,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:45:00,967 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:45:00,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:45:00,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1063216604, now seen corresponding path program 52 times [2021-01-26 14:45:00,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:45:00,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392924652] [2021-01-26 14:45:00,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:45:00,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:45:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:45:01,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392924652] [2021-01-26 14:45:01,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300743068] [2021-01-26 14:45:01,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:45:01,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:45:01,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:45:01,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-26 14:45:01,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:45:01,231 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:45:01,242 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:45:01,374 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:45:01,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:45:01,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-26 14:45:01,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164557687] [2021-01-26 14:45:01,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:45:01,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:45:01,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:45:01,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:45:01,376 INFO L87 Difference]: Start difference. First operand 6907 states. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:45:02,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:45:02,058 INFO L93 Difference]: Finished difference Result 6371 states and 14632 transitions. [2021-01-26 14:45:02,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-26 14:45:02,059 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-26 14:45:02,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:45:02,066 INFO L225 Difference]: With dead ends: 6371 [2021-01-26 14:45:02,066 INFO L226 Difference]: Without dead ends: 5910 [2021-01-26 14:45:02,067 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=416, Invalid=1066, Unknown=0, NotChecked=0, Total=1482 [2021-01-26 14:45:02,067 INFO L78 Accepts]: Start accepts. Automaton has 5910 states. Word has length 76 [2021-01-26 14:45:02,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:45:02,067 INFO L481 AbstractCegarLoop]: Abstraction has 5910 states. [2021-01-26 14:45:02,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:45:02,067 INFO L276 IsEmpty]: Start isEmpty. Operand 5910 states. [2021-01-26 14:45:02,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-26 14:45:02,073 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:45:02,073 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:45:02,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:45:02,273 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:45:02,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:45:02,274 INFO L82 PathProgramCache]: Analyzing trace with hash 2102535418, now seen corresponding path program 53 times [2021-01-26 14:45:02,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:45:02,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721706452] [2021-01-26 14:45:02,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:45:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:45:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 80 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-26 14:45:02,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721706452] [2021-01-26 14:45:02,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442895908] [2021-01-26 14:45:02,383 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:45:02,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-26 14:45:02,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:45:02,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:45:02,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:45:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-26 14:45:02,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-26 14:45:02,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-01-26 14:45:02,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128214841] [2021-01-26 14:45:02,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-26 14:45:02,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:45:02,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-26 14:45:02,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-01-26 14:45:02,521 INFO L87 Difference]: Start difference. First operand 5910 states. Second operand has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:45:02,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:45:02,721 INFO L93 Difference]: Finished difference Result 12137 states and 26896 transitions. [2021-01-26 14:45:02,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-26 14:45:02,722 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-01-26 14:45:02,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:45:02,726 INFO L225 Difference]: With dead ends: 12137 [2021-01-26 14:45:02,726 INFO L226 Difference]: Without dead ends: 2761 [2021-01-26 14:45:02,726 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-01-26 14:45:02,727 INFO L78 Accepts]: Start accepts. Automaton has 2761 states. Word has length 81 [2021-01-26 14:45:02,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:45:02,727 INFO L481 AbstractCegarLoop]: Abstraction has 2761 states. [2021-01-26 14:45:02,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:45:02,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2761 states. [2021-01-26 14:45:02,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-26 14:45:02,731 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:45:02,731 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:45:02,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:45:02,946 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:45:02,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:45:02,946 INFO L82 PathProgramCache]: Analyzing trace with hash -298810531, now seen corresponding path program 54 times [2021-01-26 14:45:02,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:45:02,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976376794] [2021-01-26 14:45:02,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:45:02,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:45:03,053 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 81 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:45:03,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976376794] [2021-01-26 14:45:03,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081057330] [2021-01-26 14:45:03,054 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:45:03,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-26 14:45:03,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:45:03,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:45:03,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:45:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:45:03,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-26 14:45:03,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-01-26 14:45:03,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559588437] [2021-01-26 14:45:03,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-26 14:45:03,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:45:03,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-26 14:45:03,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-01-26 14:45:03,162 INFO L87 Difference]: Start difference. First operand 2761 states. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:45:03,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:45:03,346 INFO L93 Difference]: Finished difference Result 5036 states and 10462 transitions. [2021-01-26 14:45:03,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-26 14:45:03,347 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-01-26 14:45:03,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:45:03,348 INFO L225 Difference]: With dead ends: 5036 [2021-01-26 14:45:03,348 INFO L226 Difference]: Without dead ends: 0 [2021-01-26 14:45:03,348 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-01-26 14:45:03,348 INFO L78 Accepts]: Start accepts. Automaton has 0 states. Word has length 81 [2021-01-26 14:45:03,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:45:03,348 INFO L481 AbstractCegarLoop]: Abstraction has 0 states. [2021-01-26 14:45:03,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:45:03,348 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states. [2021-01-26 14:45:03,349 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-26 14:45:03,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-01-26 14:45:03,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.01 02:45:03 BasicIcfg [2021-01-26 14:45:03,556 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-26 14:45:03,557 INFO L168 Benchmark]: Toolchain (without parser) took 63944.69 ms. Allocated memory was 306.2 MB in the beginning and 1.6 GB in the end (delta: 1.3 GB). Free memory was 280.8 MB in the beginning and 1.1 GB in the end (delta: -769.9 MB). Peak memory consumption was 542.5 MB. Max. memory is 16.0 GB. [2021-01-26 14:45:03,558 INFO L168 Benchmark]: CDTParser took 0.55 ms. Allocated memory is still 306.2 MB. Free memory was 277.1 MB in the beginning and 277.0 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-01-26 14:45:03,558 INFO L168 Benchmark]: CACSL2BoogieTranslator took 978.95 ms. Allocated memory is still 306.2 MB. Free memory was 279.7 MB in the beginning and 282.5 MB in the end (delta: -2.8 MB). Peak memory consumption was 28.3 MB. Max. memory is 16.0 GB. [2021-01-26 14:45:03,558 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.28 ms. Allocated memory is still 306.2 MB. Free memory was 282.5 MB in the beginning and 280.4 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-01-26 14:45:03,559 INFO L168 Benchmark]: Boogie Preprocessor took 35.20 ms. Allocated memory is still 306.2 MB. Free memory was 280.4 MB in the beginning and 278.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-01-26 14:45:03,559 INFO L168 Benchmark]: RCFGBuilder took 674.17 ms. Allocated memory is still 306.2 MB. Free memory was 278.3 MB in the beginning and 256.3 MB in the end (delta: 22.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-01-26 14:45:03,559 INFO L168 Benchmark]: TraceAbstraction took 62188.78 ms. Allocated memory was 306.2 MB in the beginning and 1.6 GB in the end (delta: 1.3 GB). Free memory was 256.3 MB in the beginning and 1.1 GB in the end (delta: -794.4 MB). Peak memory consumption was 518.4 MB. Max. memory is 16.0 GB. [2021-01-26 14:45:03,561 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.55 ms. Allocated memory is still 306.2 MB. Free memory was 277.1 MB in the beginning and 277.0 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 978.95 ms. Allocated memory is still 306.2 MB. Free memory was 279.7 MB in the beginning and 282.5 MB in the end (delta: -2.8 MB). Peak memory consumption was 28.3 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 50.28 ms. Allocated memory is still 306.2 MB. Free memory was 282.5 MB in the beginning and 280.4 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 35.20 ms. Allocated memory is still 306.2 MB. Free memory was 280.4 MB in the beginning and 278.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 674.17 ms. Allocated memory is still 306.2 MB. Free memory was 278.3 MB in the beginning and 256.3 MB in the end (delta: 22.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 62188.78 ms. Allocated memory was 306.2 MB in the beginning and 1.6 GB in the end (delta: 1.3 GB). Free memory was 256.3 MB in the beginning and 1.1 GB in the end (delta: -794.4 MB). Peak memory consumption was 518.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 693]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 62.0s, OverallIterations: 64, TraceHistogramMax: 6, AutomataDifference: 28.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 5879 SDtfs, 22080 SDslu, 37837 SDs, 0 SdLazy, 7011 SolverSat, 2587 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5196 GetRequests, 3605 SyntacticMatches, 53 SemanticMatches, 1538 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8357 ImplicationChecksByTransitivity, 24.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6907occurred in iteration=61, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 14.3s InterpolantComputationTime, 7472 NumberOfCodeBlocks, 7472 NumberOfCodeBlocksAsserted, 241 NumberOfCheckSat, 7350 ConstructedInterpolants, 0 QuantifiedInterpolants, 1672464 SizeOfPredicates, 603 NumberOfNonLiveVariables, 8512 ConjunctsInSsa, 782 ConjunctsInUnsatCore, 122 InterpolantComputations, 8 PerfectInterpolantSequences, 358/4640 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...