/usr/bin/java -Xmx8000000000 -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/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-SP.epf -i ../../../trunk/examples/svcomp/pthread/triangular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7a177ad [2020-11-09 16:20:35,269 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-09 16:20:35,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-09 16:20:35,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-09 16:20:35,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-09 16:20:35,312 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-09 16:20:35,314 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-09 16:20:35,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-09 16:20:35,319 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-09 16:20:35,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-09 16:20:35,333 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-09 16:20:35,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-09 16:20:35,335 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-09 16:20:35,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-09 16:20:35,337 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-09 16:20:35,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-09 16:20:35,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-09 16:20:35,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-09 16:20:35,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-09 16:20:35,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-09 16:20:35,348 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-09 16:20:35,349 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-09 16:20:35,351 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-09 16:20:35,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-09 16:20:35,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-09 16:20:35,355 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-09 16:20:35,356 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-09 16:20:35,357 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-09 16:20:35,357 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-09 16:20:35,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-09 16:20:35,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-09 16:20:35,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-09 16:20:35,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-09 16:20:35,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-09 16:20:35,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-09 16:20:35,363 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-09 16:20:35,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-09 16:20:35,364 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-09 16:20:35,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-09 16:20:35,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-09 16:20:35,367 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-09 16:20:35,368 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-SP.epf [2020-11-09 16:20:35,396 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-09 16:20:35,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-09 16:20:35,401 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-09 16:20:35,403 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-09 16:20:35,403 INFO L138 SettingsManager]: * Use SBE=true [2020-11-09 16:20:35,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-09 16:20:35,404 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-09 16:20:35,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-09 16:20:35,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-09 16:20:35,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-09 16:20:35,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-09 16:20:35,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-09 16:20:35,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-09 16:20:35,405 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-09 16:20:35,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-09 16:20:35,405 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-09 16:20:35,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-09 16:20:35,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-09 16:20:35,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-09 16:20:35,406 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-09 16:20:35,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-09 16:20:35,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-09 16:20:35,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-09 16:20:35,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-11-09 16:20:35,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-09 16:20:35,408 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-09 16:20:35,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-09 16:20:35,408 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-11-09 16:20:35,408 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-11-09 16:20:35,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-09 16:20:35,409 INFO L138 SettingsManager]: * Interpolant automaton=MCR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-09 16:20:35,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-09 16:20:35,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-09 16:20:35,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-09 16:20:35,886 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-09 16:20:35,887 INFO L275 PluginConnector]: CDTParser initialized [2020-11-09 16:20:35,888 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2020-11-09 16:20:35,983 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebe7bbf0b/635cfb32305c4a08b88ac9ca72215608/FLAG0d97f4ed0 [2020-11-09 16:20:36,729 INFO L306 CDTParser]: Found 1 translation units. [2020-11-09 16:20:36,729 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i [2020-11-09 16:20:36,743 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebe7bbf0b/635cfb32305c4a08b88ac9ca72215608/FLAG0d97f4ed0 [2020-11-09 16:20:36,970 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebe7bbf0b/635cfb32305c4a08b88ac9ca72215608 [2020-11-09 16:20:36,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-09 16:20:36,981 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-09 16:20:36,983 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-09 16:20:36,983 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-09 16:20:36,992 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-09 16:20:36,993 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:20:36" (1/1) ... [2020-11-09 16:20:36,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74006cff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:36, skipping insertion in model container [2020-11-09 16:20:36,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:20:36" (1/1) ... [2020-11-09 16:20:37,007 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-09 16:20:37,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-09 16:20:37,476 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-09 16:20:37,487 INFO L203 MainTranslator]: Completed pre-run [2020-11-09 16:20:37,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-09 16:20:37,653 INFO L208 MainTranslator]: Completed translation [2020-11-09 16:20:37,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:37 WrapperNode [2020-11-09 16:20:37,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-09 16:20:37,656 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-09 16:20:37,656 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-09 16:20:37,656 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-09 16:20:37,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:37" (1/1) ... [2020-11-09 16:20:37,712 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:37" (1/1) ... [2020-11-09 16:20:37,751 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-09 16:20:37,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-09 16:20:37,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-09 16:20:37,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-09 16:20:37,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:37" (1/1) ... [2020-11-09 16:20:37,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:37" (1/1) ... [2020-11-09 16:20:37,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:37" (1/1) ... [2020-11-09 16:20:37,776 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:37" (1/1) ... [2020-11-09 16:20:37,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:37" (1/1) ... [2020-11-09 16:20:37,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:37" (1/1) ... [2020-11-09 16:20:37,813 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:37" (1/1) ... [2020-11-09 16:20:37,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-09 16:20:37,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-09 16:20:37,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-09 16:20:37,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-09 16:20:37,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:37" (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 [2020-11-09 16:20:37,930 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-09 16:20:37,930 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-09 16:20:37,932 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-09 16:20:37,932 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-09 16:20:37,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-09 16:20:37,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-09 16:20:37,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-09 16:20:37,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-09 16:20:37,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-09 16:20:37,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-09 16:20:37,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-09 16:20:37,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-09 16:20:37,938 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-09 16:20:38,388 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-09 16:20:38,388 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-09 16:20:38,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:20:38 BoogieIcfgContainer [2020-11-09 16:20:38,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-09 16:20:38,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-09 16:20:38,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-09 16:20:38,396 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-09 16:20:38,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 04:20:36" (1/3) ... [2020-11-09 16:20:38,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b7fdd79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:20:38, skipping insertion in model container [2020-11-09 16:20:38,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:37" (2/3) ... [2020-11-09 16:20:38,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b7fdd79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:20:38, skipping insertion in model container [2020-11-09 16:20:38,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:20:38" (3/3) ... [2020-11-09 16:20:38,400 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2020-11-09 16:20:38,416 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-09 16:20:38,416 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-09 16:20:38,420 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-09 16:20:38,421 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-09 16:20:38,451 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,452 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,452 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,452 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,452 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,453 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,453 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,453 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,453 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,454 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,454 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,454 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,454 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,455 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,455 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,455 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,455 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,455 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,456 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,456 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,456 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,456 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,457 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,457 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,457 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,457 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,458 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,458 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,458 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,459 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,459 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,459 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,459 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,459 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,460 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,460 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,460 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,460 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,461 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,461 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,461 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,461 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,462 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,462 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,462 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,462 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,462 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,463 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,463 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,463 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,463 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,463 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,464 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,464 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,464 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,464 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,467 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,467 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,468 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,468 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,468 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,468 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,474 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,474 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,475 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,475 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,475 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,475 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:38,477 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-09 16:20:38,491 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-09 16:20:38,516 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-09 16:20:38,516 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-09 16:20:38,516 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-09 16:20:38,517 INFO L380 AbstractCegarLoop]: Backedges is MCR [2020-11-09 16:20:38,517 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-09 16:20:38,517 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-09 16:20:38,517 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-09 16:20:38,517 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-09 16:20:38,529 INFO L128 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-11-09 16:20:38,530 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-09 16:20:38,533 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-09 16:20:38,535 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-11-09 16:20:38,578 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-11-09 16:20:38,578 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-09 16:20:38,584 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 62 events. 6/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 97 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2020-11-09 16:20:38,587 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-11-09 16:20:40,521 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-09 16:20:40,699 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-09 16:20:41,556 WARN L194 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-11-09 16:20:41,664 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-09 16:20:41,907 WARN L194 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-11-09 16:20:42,015 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-09 16:20:42,446 WARN L194 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-11-09 16:20:42,591 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-09 16:20:42,913 WARN L194 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-11-09 16:20:43,069 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-09 16:20:43,121 INFO L131 LiptonReduction]: Checked pairs total: 1187 [2020-11-09 16:20:43,121 INFO L133 LiptonReduction]: Total number of compositions: 62 [2020-11-09 16:20:43,128 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-11-09 16:20:43,137 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-11-09 16:20:43,138 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-11-09 16:20:43,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-09 16:20:43,143 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:43,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-09 16:20:43,145 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:43,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:43,150 INFO L82 PathProgramCache]: Analyzing trace with hash -805875314, now seen corresponding path program 1 times [2020-11-09 16:20:43,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:43,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240912207] [2020-11-09 16:20:43,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:43,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:43,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240912207] [2020-11-09 16:20:43,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 16:20:43,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-09 16:20:43,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [499222130] [2020-11-09 16:20:43,425 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:43,430 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:43,447 INFO L252 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-11-09 16:20:43,447 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:43,452 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:20:43,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-09 16:20:43,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:43,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-09 16:20:43,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-09 16:20:43,475 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-11-09 16:20:43,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:43,565 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-11-09 16:20:43,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-09 16:20:43,567 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-09 16:20:43,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:43,578 INFO L225 Difference]: With dead ends: 75 [2020-11-09 16:20:43,579 INFO L226 Difference]: Without dead ends: 42 [2020-11-09 16:20:43,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-09 16:20:43,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-09 16:20:43,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-09 16:20:43,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 16:20:43,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-11-09 16:20:43,624 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-11-09 16:20:43,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:43,625 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-11-09 16:20:43,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-09 16:20:43,625 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-11-09 16:20:43,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-09 16:20:43,626 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:43,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:43,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-09 16:20:43,627 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:43,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:43,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1351909113, now seen corresponding path program 1 times [2020-11-09 16:20:43,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:43,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166549267] [2020-11-09 16:20:43,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:43,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166549267] [2020-11-09 16:20:43,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 16:20:43,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-09 16:20:43,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [582828774] [2020-11-09 16:20:43,738 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:43,739 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:43,743 INFO L252 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-11-09 16:20:43,743 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:43,795 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:20:43,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-09 16:20:43,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:43,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-09 16:20:43,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-09 16:20:43,801 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-11-09 16:20:43,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:43,850 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-11-09 16:20:43,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-09 16:20:43,851 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-09 16:20:43,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:43,853 INFO L225 Difference]: With dead ends: 56 [2020-11-09 16:20:43,853 INFO L226 Difference]: Without dead ends: 50 [2020-11-09 16:20:43,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-11-09 16:20:43,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-09 16:20:43,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-11-09 16:20:43,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 16:20:43,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-11-09 16:20:43,871 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-11-09 16:20:43,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:43,872 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-11-09 16:20:43,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-09 16:20:43,872 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-11-09 16:20:43,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 16:20:43,874 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:43,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:43,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-09 16:20:43,874 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:43,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:43,875 INFO L82 PathProgramCache]: Analyzing trace with hash 2021583950, now seen corresponding path program 1 times [2020-11-09 16:20:43,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:43,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73258259] [2020-11-09 16:20:43,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:44,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:44,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73258259] [2020-11-09 16:20:44,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 16:20:44,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 16:20:44,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2065592923] [2020-11-09 16:20:44,038 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:44,039 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:44,043 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 25 transitions. [2020-11-09 16:20:44,043 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:44,052 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:44,052 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:44,072 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:44,072 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:44,103 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:44,104 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:44,121 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [474#(and (< ~i~0 16) (<= ~j~0 6))] [2020-11-09 16:20:44,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-09 16:20:44,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:44,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-09 16:20:44,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-09 16:20:44,123 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 7 states. [2020-11-09 16:20:44,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:44,241 INFO L93 Difference]: Finished difference Result 66 states and 152 transitions. [2020-11-09 16:20:44,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-09 16:20:44,241 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-11-09 16:20:44,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:44,243 INFO L225 Difference]: With dead ends: 66 [2020-11-09 16:20:44,243 INFO L226 Difference]: Without dead ends: 50 [2020-11-09 16:20:44,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-11-09 16:20:44,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-09 16:20:44,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-11-09 16:20:44,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 16:20:44,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 99 transitions. [2020-11-09 16:20:44,251 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 99 transitions. Word has length 10 [2020-11-09 16:20:44,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:44,251 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 99 transitions. [2020-11-09 16:20:44,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-09 16:20:44,251 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 99 transitions. [2020-11-09 16:20:44,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 16:20:44,252 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:44,252 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:44,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-09 16:20:44,253 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:44,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:44,254 INFO L82 PathProgramCache]: Analyzing trace with hash 2082353870, now seen corresponding path program 2 times [2020-11-09 16:20:44,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:44,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591003353] [2020-11-09 16:20:44,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:44,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:44,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:44,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591003353] [2020-11-09 16:20:44,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 16:20:44,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 16:20:44,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [72367483] [2020-11-09 16:20:44,323 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:44,324 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:44,326 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-11-09 16:20:44,326 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:44,346 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:44,346 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:44,371 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [639#(and (<= ~i~0 7) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:20:44,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-09 16:20:44,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:44,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-09 16:20:44,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-09 16:20:44,373 INFO L87 Difference]: Start difference. First operand 42 states and 99 transitions. Second operand 7 states. [2020-11-09 16:20:44,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:44,442 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-11-09 16:20:44,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-09 16:20:44,443 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-11-09 16:20:44,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:44,444 INFO L225 Difference]: With dead ends: 67 [2020-11-09 16:20:44,444 INFO L226 Difference]: Without dead ends: 54 [2020-11-09 16:20:44,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-11-09 16:20:44,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-09 16:20:44,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2020-11-09 16:20:44,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 16:20:44,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-11-09 16:20:44,451 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 10 [2020-11-09 16:20:44,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:44,452 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-11-09 16:20:44,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-09 16:20:44,452 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-11-09 16:20:44,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 16:20:44,453 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:44,453 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:44,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-09 16:20:44,453 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:44,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:44,454 INFO L82 PathProgramCache]: Analyzing trace with hash 735328415, now seen corresponding path program 3 times [2020-11-09 16:20:44,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:44,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971619189] [2020-11-09 16:20:44,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:44,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971619189] [2020-11-09 16:20:44,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788464944] [2020-11-09 16:20:44,559 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 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 [2020-11-09 16:20:44,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-09 16:20:44,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:44,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 16:20:44,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:44,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:44,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:44,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-09 16:20:44,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1089248302] [2020-11-09 16:20:44,692 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:44,693 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:44,695 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-11-09 16:20:44,695 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:44,718 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [835#(and (<= ~i~0 5) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:20:44,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 16:20:44,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:44,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 16:20:44,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-09 16:20:44,720 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 8 states. [2020-11-09 16:20:44,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:44,883 INFO L93 Difference]: Finished difference Result 63 states and 147 transitions. [2020-11-09 16:20:44,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 16:20:44,884 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-09 16:20:44,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:44,885 INFO L225 Difference]: With dead ends: 63 [2020-11-09 16:20:44,885 INFO L226 Difference]: Without dead ends: 54 [2020-11-09 16:20:44,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2020-11-09 16:20:44,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-09 16:20:44,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2020-11-09 16:20:44,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-09 16:20:44,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 87 transitions. [2020-11-09 16:20:44,892 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 87 transitions. Word has length 11 [2020-11-09 16:20:44,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:44,892 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 87 transitions. [2020-11-09 16:20:44,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 16:20:44,892 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 87 transitions. [2020-11-09 16:20:44,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 16:20:44,893 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:44,894 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:45,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:45,108 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:45,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:45,110 INFO L82 PathProgramCache]: Analyzing trace with hash 128488628, now seen corresponding path program 4 times [2020-11-09 16:20:45,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:45,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649878079] [2020-11-09 16:20:45,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:45,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649878079] [2020-11-09 16:20:45,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559712069] [2020-11-09 16:20:45,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 16:20:45,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:20:45,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:45,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-09 16:20:45,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:45,281 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:20:45,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:45,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:45,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-09 16:20:45,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1744045845] [2020-11-09 16:20:45,294 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:45,295 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:45,298 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 23 transitions. [2020-11-09 16:20:45,298 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:45,318 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:20:45,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-09 16:20:45,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:45,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-09 16:20:45,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-09 16:20:45,320 INFO L87 Difference]: Start difference. First operand 37 states and 87 transitions. Second operand 7 states. [2020-11-09 16:20:45,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:45,455 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-11-09 16:20:45,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-09 16:20:45,456 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-11-09 16:20:45,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:45,457 INFO L225 Difference]: With dead ends: 56 [2020-11-09 16:20:45,457 INFO L226 Difference]: Without dead ends: 51 [2020-11-09 16:20:45,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-11-09 16:20:45,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-09 16:20:45,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-11-09 16:20:45,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-09 16:20:45,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-11-09 16:20:45,474 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-11-09 16:20:45,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:45,474 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-11-09 16:20:45,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-09 16:20:45,474 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-11-09 16:20:45,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 16:20:45,477 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:45,478 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:45,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:45,679 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:45,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:45,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1416964401, now seen corresponding path program 5 times [2020-11-09 16:20:45,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:45,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956028149] [2020-11-09 16:20:45,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:45,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:45,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956028149] [2020-11-09 16:20:45,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500613313] [2020-11-09 16:20:45,837 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 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 [2020-11-09 16:20:45,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:20:45,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:45,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 16:20:45,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:45,909 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:20:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:45,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:45,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-09 16:20:45,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [566660609] [2020-11-09 16:20:45,931 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:45,934 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:45,937 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 27 transitions. [2020-11-09 16:20:45,937 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:45,940 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:45,940 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:45,970 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:45,971 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:45,993 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:45,993 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:46,009 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1218#(and (< ~i~0 16) (<= ~j~0 6))] [2020-11-09 16:20:46,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 16:20:46,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:46,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 16:20:46,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-09 16:20:46,011 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 9 states. [2020-11-09 16:20:46,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:46,163 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-11-09 16:20:46,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 16:20:46,163 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-09 16:20:46,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:46,164 INFO L225 Difference]: With dead ends: 56 [2020-11-09 16:20:46,164 INFO L226 Difference]: Without dead ends: 50 [2020-11-09 16:20:46,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-11-09 16:20:46,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-09 16:20:46,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-11-09 16:20:46,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-09 16:20:46,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 113 transitions. [2020-11-09 16:20:46,173 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 113 transitions. Word has length 12 [2020-11-09 16:20:46,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:46,174 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 113 transitions. [2020-11-09 16:20:46,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 16:20:46,174 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 113 transitions. [2020-11-09 16:20:46,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 16:20:46,178 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:46,178 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:46,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:46,395 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:46,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:46,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1320372483, now seen corresponding path program 6 times [2020-11-09 16:20:46,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:46,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330952646] [2020-11-09 16:20:46,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:46,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:46,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:46,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330952646] [2020-11-09 16:20:46,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789377223] [2020-11-09 16:20:46,500 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 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 [2020-11-09 16:20:46,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-09 16:20:46,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:46,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 16:20:46,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:46,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:20:46,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:46,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:46,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-09 16:20:46,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [496957266] [2020-11-09 16:20:46,632 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:46,634 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:46,636 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-11-09 16:20:46,638 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:46,651 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:20:46,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 16:20:46,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:46,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 16:20:46,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-09 16:20:46,653 INFO L87 Difference]: Start difference. First operand 47 states and 113 transitions. Second operand 8 states. [2020-11-09 16:20:46,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:46,876 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-11-09 16:20:46,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-09 16:20:46,877 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-11-09 16:20:46,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:46,878 INFO L225 Difference]: With dead ends: 64 [2020-11-09 16:20:46,878 INFO L226 Difference]: Without dead ends: 59 [2020-11-09 16:20:46,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-11-09 16:20:46,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-09 16:20:46,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-11-09 16:20:46,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 16:20:46,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 99 transitions. [2020-11-09 16:20:46,885 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 99 transitions. Word has length 12 [2020-11-09 16:20:46,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:46,885 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 99 transitions. [2020-11-09 16:20:46,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 16:20:46,885 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 99 transitions. [2020-11-09 16:20:46,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 16:20:46,886 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:46,886 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:47,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:47,098 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:47,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:47,099 INFO L82 PathProgramCache]: Analyzing trace with hash -311794613, now seen corresponding path program 7 times [2020-11-09 16:20:47,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:47,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231502942] [2020-11-09 16:20:47,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:47,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231502942] [2020-11-09 16:20:47,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790898479] [2020-11-09 16:20:47,182 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 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 [2020-11-09 16:20:47,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:47,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 16:20:47,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:47,266 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:20:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:47,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:47,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-09 16:20:47,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1303434787] [2020-11-09 16:20:47,279 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:47,282 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:47,286 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-11-09 16:20:47,289 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:47,333 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1631#(and (<= ~i~0 9) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:20:47,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 16:20:47,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:47,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 16:20:47,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-11-09 16:20:47,335 INFO L87 Difference]: Start difference. First operand 42 states and 99 transitions. Second operand 9 states. [2020-11-09 16:20:47,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:47,500 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-11-09 16:20:47,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 16:20:47,500 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-09 16:20:47,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:47,501 INFO L225 Difference]: With dead ends: 72 [2020-11-09 16:20:47,501 INFO L226 Difference]: Without dead ends: 63 [2020-11-09 16:20:47,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-11-09 16:20:47,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-09 16:20:47,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 48. [2020-11-09 16:20:47,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-09 16:20:47,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-11-09 16:20:47,507 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 12 [2020-11-09 16:20:47,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:47,507 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-11-09 16:20:47,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 16:20:47,507 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-11-09 16:20:47,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 16:20:47,508 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:47,508 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:47,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:47,720 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:47,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:47,721 INFO L82 PathProgramCache]: Analyzing trace with hash -2018100772, now seen corresponding path program 8 times [2020-11-09 16:20:47,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:47,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66224862] [2020-11-09 16:20:47,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:47,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:47,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66224862] [2020-11-09 16:20:47,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769744359] [2020-11-09 16:20:47,792 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 [2020-11-09 16:20:47,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:20:47,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:47,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 16:20:47,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:47,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:47,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:47,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-09 16:20:47,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [360575774] [2020-11-09 16:20:47,904 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:47,905 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:47,908 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-11-09 16:20:47,908 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:47,934 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1860#(and (<= ~i~0 7) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:20:47,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-09 16:20:47,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:47,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-09 16:20:47,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-11-09 16:20:47,936 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 10 states. [2020-11-09 16:20:48,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:48,227 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-11-09 16:20:48,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 16:20:48,228 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-09 16:20:48,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:48,229 INFO L225 Difference]: With dead ends: 72 [2020-11-09 16:20:48,229 INFO L226 Difference]: Without dead ends: 63 [2020-11-09 16:20:48,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-11-09 16:20:48,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-09 16:20:48,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-11-09 16:20:48,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-09 16:20:48,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-11-09 16:20:48,236 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 13 [2020-11-09 16:20:48,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:48,236 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-11-09 16:20:48,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-09 16:20:48,236 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-11-09 16:20:48,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 16:20:48,237 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:48,237 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:48,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:48,450 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:48,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:48,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1075670313, now seen corresponding path program 9 times [2020-11-09 16:20:48,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:48,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048827699] [2020-11-09 16:20:48,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:48,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:48,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048827699] [2020-11-09 16:20:48,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061939149] [2020-11-09 16:20:48,538 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 [2020-11-09 16:20:48,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-09 16:20:48,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:48,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 16:20:48,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:48,636 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:20:48,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:48,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:48,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-09 16:20:48,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [627104613] [2020-11-09 16:20:48,657 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:48,659 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:48,663 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-11-09 16:20:48,664 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:48,683 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:20:48,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 16:20:48,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:48,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 16:20:48,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-09 16:20:48,685 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 9 states. [2020-11-09 16:20:48,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:48,880 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-11-09 16:20:48,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-09 16:20:48,880 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-11-09 16:20:48,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:48,881 INFO L225 Difference]: With dead ends: 64 [2020-11-09 16:20:48,882 INFO L226 Difference]: Without dead ends: 59 [2020-11-09 16:20:48,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-11-09 16:20:48,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-09 16:20:48,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-11-09 16:20:48,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-09 16:20:48,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-11-09 16:20:48,887 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-11-09 16:20:48,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:48,887 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-11-09 16:20:48,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 16:20:48,887 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-11-09 16:20:48,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 16:20:48,888 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:48,888 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:49,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:49,101 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:49,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:49,102 INFO L82 PathProgramCache]: Analyzing trace with hash 198162772, now seen corresponding path program 10 times [2020-11-09 16:20:49,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:49,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916122591] [2020-11-09 16:20:49,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:49,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:49,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:49,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916122591] [2020-11-09 16:20:49,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966899171] [2020-11-09 16:20:49,249 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 [2020-11-09 16:20:49,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:20:49,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:49,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 16:20:49,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:49,316 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:20:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:49,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:49,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-09 16:20:49,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [298958247] [2020-11-09 16:20:49,333 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:49,335 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:49,338 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-11-09 16:20:49,338 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:49,359 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:49,359 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:49,380 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:49,380 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:49,401 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:49,402 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:49,418 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2312#(and (< ~i~0 16) (<= ~j~0 6))] [2020-11-09 16:20:49,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 16:20:49,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:49,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 16:20:49,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-09 16:20:49,420 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 11 states. [2020-11-09 16:20:49,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:49,659 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-11-09 16:20:49,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-09 16:20:49,661 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-09 16:20:49,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:49,662 INFO L225 Difference]: With dead ends: 64 [2020-11-09 16:20:49,662 INFO L226 Difference]: Without dead ends: 58 [2020-11-09 16:20:49,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-11-09 16:20:49,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-09 16:20:49,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-11-09 16:20:49,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-09 16:20:49,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 129 transitions. [2020-11-09 16:20:49,667 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 129 transitions. Word has length 14 [2020-11-09 16:20:49,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:49,667 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 129 transitions. [2020-11-09 16:20:49,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 16:20:49,668 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 129 transitions. [2020-11-09 16:20:49,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 16:20:49,668 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:49,668 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:49,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-09 16:20:49,880 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:49,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:49,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1863413606, now seen corresponding path program 11 times [2020-11-09 16:20:49,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:49,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415322486] [2020-11-09 16:20:49,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:49,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415322486] [2020-11-09 16:20:49,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758715207] [2020-11-09 16:20:49,974 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 [2020-11-09 16:20:50,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-09 16:20:50,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:50,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 16:20:50,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:50,083 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:20:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:50,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:50,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-09 16:20:50,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2049981136] [2020-11-09 16:20:50,100 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:50,102 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:50,104 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 22 transitions. [2020-11-09 16:20:50,105 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:50,110 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:20:50,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-09 16:20:50,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:50,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-09 16:20:50,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-09 16:20:50,112 INFO L87 Difference]: Start difference. First operand 53 states and 129 transitions. Second operand 10 states. [2020-11-09 16:20:50,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:50,405 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-11-09 16:20:50,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-09 16:20:50,405 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-09 16:20:50,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:50,406 INFO L225 Difference]: With dead ends: 74 [2020-11-09 16:20:50,406 INFO L226 Difference]: Without dead ends: 69 [2020-11-09 16:20:50,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-11-09 16:20:50,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-09 16:20:50,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 46. [2020-11-09 16:20:50,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-09 16:20:50,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 109 transitions. [2020-11-09 16:20:50,418 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 109 transitions. Word has length 14 [2020-11-09 16:20:50,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:50,418 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 109 transitions. [2020-11-09 16:20:50,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-09 16:20:50,418 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 109 transitions. [2020-11-09 16:20:50,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 16:20:50,419 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:50,420 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:50,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:50,631 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:50,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:50,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1013983880, now seen corresponding path program 12 times [2020-11-09 16:20:50,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:50,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083683841] [2020-11-09 16:20:50,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:50,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:50,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083683841] [2020-11-09 16:20:50,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045627578] [2020-11-09 16:20:50,737 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 [2020-11-09 16:20:50,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-09 16:20:50,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:50,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 16:20:50,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:50,822 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:20:50,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:50,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:50,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-09 16:20:50,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [92082976] [2020-11-09 16:20:50,835 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:50,839 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:50,846 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-11-09 16:20:50,846 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:50,897 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2791#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 11))] [2020-11-09 16:20:50,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 16:20:50,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:50,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 16:20:50,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-11-09 16:20:50,899 INFO L87 Difference]: Start difference. First operand 46 states and 109 transitions. Second operand 11 states. [2020-11-09 16:20:51,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:51,189 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-11-09 16:20:51,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 16:20:51,190 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-09 16:20:51,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:51,191 INFO L225 Difference]: With dead ends: 82 [2020-11-09 16:20:51,191 INFO L226 Difference]: Without dead ends: 73 [2020-11-09 16:20:51,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-11-09 16:20:51,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-09 16:20:51,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-11-09 16:20:51,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-09 16:20:51,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-11-09 16:20:51,196 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 14 [2020-11-09 16:20:51,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:51,197 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-11-09 16:20:51,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 16:20:51,197 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-11-09 16:20:51,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-09 16:20:51,197 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:51,198 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:51,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:51,408 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:51,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:51,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1931272153, now seen corresponding path program 13 times [2020-11-09 16:20:51,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:51,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361434808] [2020-11-09 16:20:51,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:51,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:51,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361434808] [2020-11-09 16:20:51,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719543559] [2020-11-09 16:20:51,487 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 [2020-11-09 16:20:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:51,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 16:20:51,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:51,569 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:20:51,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:51,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:51,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-09 16:20:51,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [108595066] [2020-11-09 16:20:51,589 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:51,591 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:51,594 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-11-09 16:20:51,594 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:51,621 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3058#(and (<= ~i~0 9) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:20:51,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 16:20:51,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:51,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 16:20:51,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-11-09 16:20:51,623 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 12 states. [2020-11-09 16:20:51,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:51,961 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-11-09 16:20:51,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 16:20:51,961 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-11-09 16:20:51,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:51,962 INFO L225 Difference]: With dead ends: 82 [2020-11-09 16:20:51,962 INFO L226 Difference]: Without dead ends: 73 [2020-11-09 16:20:51,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-11-09 16:20:51,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-09 16:20:51,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 45. [2020-11-09 16:20:51,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-09 16:20:51,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-11-09 16:20:51,967 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 15 [2020-11-09 16:20:51,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:51,968 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-11-09 16:20:51,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 16:20:51,968 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-11-09 16:20:51,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-09 16:20:51,968 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:51,968 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:52,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-09 16:20:52,180 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:52,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:52,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1368757306, now seen corresponding path program 14 times [2020-11-09 16:20:52,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:52,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243886571] [2020-11-09 16:20:52,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:52,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:52,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:52,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243886571] [2020-11-09 16:20:52,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100963107] [2020-11-09 16:20:52,265 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 [2020-11-09 16:20:52,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:20:52,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:52,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 16:20:52,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:52,351 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:20:52,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:52,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:52,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-09 16:20:52,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [517620975] [2020-11-09 16:20:52,365 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:52,367 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:52,370 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 27 transitions. [2020-11-09 16:20:52,370 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:52,397 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:20:52,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 16:20:52,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:52,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 16:20:52,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-09 16:20:52,399 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 11 states. [2020-11-09 16:20:52,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:52,714 INFO L93 Difference]: Finished difference Result 72 states and 173 transitions. [2020-11-09 16:20:52,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-09 16:20:52,716 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-11-09 16:20:52,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:52,717 INFO L225 Difference]: With dead ends: 72 [2020-11-09 16:20:52,717 INFO L226 Difference]: Without dead ends: 67 [2020-11-09 16:20:52,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2020-11-09 16:20:52,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-09 16:20:52,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-11-09 16:20:52,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-09 16:20:52,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-11-09 16:20:52,721 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-11-09 16:20:52,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:52,721 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-11-09 16:20:52,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 16:20:52,722 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-11-09 16:20:52,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 16:20:52,722 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:52,722 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:52,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-09 16:20:52,929 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:52,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:52,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1455869111, now seen corresponding path program 15 times [2020-11-09 16:20:52,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:52,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467961273] [2020-11-09 16:20:52,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:53,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467961273] [2020-11-09 16:20:53,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844582399] [2020-11-09 16:20:53,042 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 [2020-11-09 16:20:53,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-09 16:20:53,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:53,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 16:20:53,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:53,120 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:20:53,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:53,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:53,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-09 16:20:53,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2093019383] [2020-11-09 16:20:53,139 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:53,140 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:53,144 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 31 transitions. [2020-11-09 16:20:53,145 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:53,168 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:53,168 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:53,188 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:53,189 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:53,204 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:53,204 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:53,215 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3580#(and (< ~i~0 16) (<= ~j~0 6))] [2020-11-09 16:20:53,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 16:20:53,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:53,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 16:20:53,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-11-09 16:20:53,218 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 13 states. [2020-11-09 16:20:53,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:53,419 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-11-09 16:20:53,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 16:20:53,420 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-09 16:20:53,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:53,420 INFO L225 Difference]: With dead ends: 72 [2020-11-09 16:20:53,421 INFO L226 Difference]: Without dead ends: 66 [2020-11-09 16:20:53,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2020-11-09 16:20:53,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-09 16:20:53,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2020-11-09 16:20:53,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-09 16:20:53,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-11-09 16:20:53,430 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 16 [2020-11-09 16:20:53,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:53,430 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-11-09 16:20:53,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 16:20:53,430 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-11-09 16:20:53,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 16:20:53,433 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:53,433 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:53,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-09 16:20:53,643 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:53,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:53,644 INFO L82 PathProgramCache]: Analyzing trace with hash -260077303, now seen corresponding path program 16 times [2020-11-09 16:20:53,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:53,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914475146] [2020-11-09 16:20:53,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:53,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914475146] [2020-11-09 16:20:53,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505811269] [2020-11-09 16:20:53,726 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 [2020-11-09 16:20:53,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:20:53,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:53,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 16:20:53,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:53,808 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:20:53,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:53,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:53,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-09 16:20:53,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [974679482] [2020-11-09 16:20:53,825 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:53,828 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:53,831 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 24 transitions. [2020-11-09 16:20:53,831 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:53,842 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:20:53,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 16:20:53,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:53,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 16:20:53,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-09 16:20:53,843 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 12 states. [2020-11-09 16:20:54,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:54,229 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-11-09 16:20:54,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-09 16:20:54,230 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-11-09 16:20:54,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:54,230 INFO L225 Difference]: With dead ends: 84 [2020-11-09 16:20:54,230 INFO L226 Difference]: Without dead ends: 79 [2020-11-09 16:20:54,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-11-09 16:20:54,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-09 16:20:54,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 50. [2020-11-09 16:20:54,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-09 16:20:54,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 119 transitions. [2020-11-09 16:20:54,234 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 119 transitions. Word has length 16 [2020-11-09 16:20:54,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:54,235 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 119 transitions. [2020-11-09 16:20:54,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 16:20:54,235 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 119 transitions. [2020-11-09 16:20:54,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 16:20:54,236 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:54,236 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:54,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:54,447 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:54,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:54,448 INFO L82 PathProgramCache]: Analyzing trace with hash -518171259, now seen corresponding path program 17 times [2020-11-09 16:20:54,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:54,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940779394] [2020-11-09 16:20:54,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:54,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940779394] [2020-11-09 16:20:54,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587167829] [2020-11-09 16:20:54,539 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 [2020-11-09 16:20:54,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-09 16:20:54,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:54,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 16:20:54,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:54,627 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:20:54,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:54,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:54,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-09 16:20:54,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2100782474] [2020-11-09 16:20:54,642 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:54,644 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:54,646 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-11-09 16:20:54,647 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:54,678 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4125#(and (<= ~i~0 13) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:20:54,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 16:20:54,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:54,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 16:20:54,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-11-09 16:20:54,679 INFO L87 Difference]: Start difference. First operand 50 states and 119 transitions. Second operand 13 states. [2020-11-09 16:20:55,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:55,078 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-11-09 16:20:55,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 16:20:55,079 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-09 16:20:55,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:55,080 INFO L225 Difference]: With dead ends: 92 [2020-11-09 16:20:55,080 INFO L226 Difference]: Without dead ends: 83 [2020-11-09 16:20:55,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-11-09 16:20:55,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-09 16:20:55,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-11-09 16:20:55,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-09 16:20:55,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-11-09 16:20:55,085 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 16 [2020-11-09 16:20:55,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:55,085 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-11-09 16:20:55,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 16:20:55,086 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-11-09 16:20:55,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-09 16:20:55,087 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:55,087 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:55,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:55,288 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:55,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:55,289 INFO L82 PathProgramCache]: Analyzing trace with hash 527563414, now seen corresponding path program 18 times [2020-11-09 16:20:55,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:55,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276344307] [2020-11-09 16:20:55,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:55,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:55,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:55,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276344307] [2020-11-09 16:20:55,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480829461] [2020-11-09 16:20:55,428 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 [2020-11-09 16:20:55,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-09 16:20:55,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:55,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 16:20:55,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:55,533 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:20:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:55,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:55,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-09 16:20:55,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2040804550] [2020-11-09 16:20:55,550 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:55,552 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:55,555 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-11-09 16:20:55,556 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:55,576 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4430#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 11))] [2020-11-09 16:20:55,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 16:20:55,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:55,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 16:20:55,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-11-09 16:20:55,577 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 14 states. [2020-11-09 16:20:56,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:56,025 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-11-09 16:20:56,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-09 16:20:56,030 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-11-09 16:20:56,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:56,032 INFO L225 Difference]: With dead ends: 92 [2020-11-09 16:20:56,032 INFO L226 Difference]: Without dead ends: 83 [2020-11-09 16:20:56,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=770, Unknown=0, NotChecked=0, Total=1122 [2020-11-09 16:20:56,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-09 16:20:56,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2020-11-09 16:20:56,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-09 16:20:56,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-11-09 16:20:56,036 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 17 [2020-11-09 16:20:56,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:56,037 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-11-09 16:20:56,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 16:20:56,037 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-11-09 16:20:56,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-09 16:20:56,037 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:56,037 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:56,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:56,238 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:56,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:56,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1116588253, now seen corresponding path program 19 times [2020-11-09 16:20:56,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:56,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994705306] [2020-11-09 16:20:56,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:56,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:56,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:56,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994705306] [2020-11-09 16:20:56,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448604871] [2020-11-09 16:20:56,336 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 [2020-11-09 16:20:56,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:56,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 16:20:56,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:56,437 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:20:56,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:56,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:56,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-09 16:20:56,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1469030679] [2020-11-09 16:20:56,451 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:56,453 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:56,456 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 29 transitions. [2020-11-09 16:20:56,456 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:56,469 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:20:56,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 16:20:56,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:56,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 16:20:56,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-11-09 16:20:56,471 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 13 states. [2020-11-09 16:20:56,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:56,890 INFO L93 Difference]: Finished difference Result 80 states and 193 transitions. [2020-11-09 16:20:56,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-09 16:20:56,891 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-11-09 16:20:56,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:56,892 INFO L225 Difference]: With dead ends: 80 [2020-11-09 16:20:56,892 INFO L226 Difference]: Without dead ends: 75 [2020-11-09 16:20:56,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2020-11-09 16:20:56,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-11-09 16:20:56,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-11-09 16:20:56,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-09 16:20:56,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-11-09 16:20:56,898 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-11-09 16:20:56,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:56,898 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-11-09 16:20:56,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 16:20:56,898 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-11-09 16:20:56,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 16:20:56,899 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:56,899 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:57,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-09 16:20:57,102 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:57,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:57,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1069116582, now seen corresponding path program 20 times [2020-11-09 16:20:57,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:57,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295158860] [2020-11-09 16:20:57,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-09 16:20:57,117 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-09 16:20:57,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-09 16:20:57,128 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-09 16:20:57,151 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-09 16:20:57,152 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-09 16:20:57,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-09 16:20:57,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 04:20:57 BasicIcfg [2020-11-09 16:20:57,206 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-09 16:20:57,207 INFO L168 Benchmark]: Toolchain (without parser) took 20231.84 ms. Allocated memory was 160.4 MB in the beginning and 338.7 MB in the end (delta: 178.3 MB). Free memory was 135.2 MB in the beginning and 280.7 MB in the end (delta: -145.4 MB). Peak memory consumption was 33.5 MB. Max. memory is 8.0 GB. [2020-11-09 16:20:57,208 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 160.4 MB. Free memory is still 131.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-09 16:20:57,208 INFO L168 Benchmark]: CACSL2BoogieTranslator took 671.92 ms. Allocated memory is still 160.4 MB. Free memory was 134.5 MB in the beginning and 141.1 MB in the end (delta: -6.6 MB). Peak memory consumption was 32.5 MB. Max. memory is 8.0 GB. [2020-11-09 16:20:57,209 INFO L168 Benchmark]: Boogie Procedure Inliner took 96.10 ms. Allocated memory is still 160.4 MB. Free memory was 141.1 MB in the beginning and 139.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-09 16:20:57,209 INFO L168 Benchmark]: Boogie Preprocessor took 70.91 ms. Allocated memory is still 160.4 MB. Free memory was 139.5 MB in the beginning and 138.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-09 16:20:57,210 INFO L168 Benchmark]: RCFGBuilder took 562.65 ms. Allocated memory is still 160.4 MB. Free memory was 138.0 MB in the beginning and 117.5 MB in the end (delta: 20.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-11-09 16:20:57,210 INFO L168 Benchmark]: TraceAbstraction took 18813.78 ms. Allocated memory was 160.4 MB in the beginning and 338.7 MB in the end (delta: 178.3 MB). Free memory was 117.5 MB in the beginning and 280.7 MB in the end (delta: -163.2 MB). Peak memory consumption was 15.6 MB. Max. memory is 8.0 GB. [2020-11-09 16:20:57,213 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 160.4 MB. Free memory is still 131.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 671.92 ms. Allocated memory is still 160.4 MB. Free memory was 134.5 MB in the beginning and 141.1 MB in the end (delta: -6.6 MB). Peak memory consumption was 32.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 96.10 ms. Allocated memory is still 160.4 MB. Free memory was 141.1 MB in the beginning and 139.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 70.91 ms. Allocated memory is still 160.4 MB. Free memory was 139.5 MB in the beginning and 138.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 562.65 ms. Allocated memory is still 160.4 MB. Free memory was 138.0 MB in the beginning and 117.5 MB in the end (delta: 20.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 18813.78 ms. Allocated memory was 160.4 MB in the beginning and 338.7 MB in the end (delta: 178.3 MB). Free memory was 117.5 MB in the beginning and 280.7 MB in the end (delta: -163.2 MB). Peak memory consumption was 15.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 637 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 15 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 4.5s, 65 PlacesBefore, 20 PlacesAfterwards, 64 TransitionsBefore, 16 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 7 FixpointIterations, 16 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 62 TotalNumberOfCompositions, 1187 MoverChecksTotal - CounterExampleResult [Line: 685]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L686] 0 int i = 3, j = 6; [L704] 0 pthread_t id1, id2; [L705] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L706] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L708] 0 int condI = i >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L696] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L688] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L688] COND TRUE 1 k < 5 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L696] COND TRUE 2 k < 5 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L688] COND TRUE 1 k < 5 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L696] COND TRUE 2 k < 5 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L688] COND TRUE 1 k < 5 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L696] COND TRUE 2 k < 5 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L688] COND TRUE 1 k < 5 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L696] COND TRUE 2 k < 5 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L688] COND TRUE 1 k < 5 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L696] COND TRUE 2 k < 5 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L711] 0 int condJ = j >= (2*5 +6); [L713] COND TRUE 0 condI || condJ [L685] COND FALSE 0 !(0) [L685] 0 __assert_fail ("0", "triangular-2.c", 8, __extension__ __PRETTY_FUNCTION__) VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 18.6s, OverallIterations: 22, TraceHistogramMax: 5, AutomataDifference: 5.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.6s, HoareTripleCheckerStatistics: 296 SDtfs, 890 SDslu, 959 SDs, 0 SdLazy, 986 SolverSat, 542 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 688 GetRequests, 289 SyntacticMatches, 23 SemanticMatches, 376 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1678 ImplicationChecksByTransitivity, 4.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 314 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 528 NumberOfCodeBlocks, 528 NumberOfCodeBlocksAsserted, 63 NumberOfCheckSat, 472 ConstructedInterpolants, 0 QuantifiedInterpolants, 26278 SizeOfPredicates, 105 NumberOfNonLiveVariables, 1836 ConjunctsInSsa, 175 ConjunctsInUnsatCore, 38 InterpolantComputations, 4 PerfectInterpolantSequences, 0/240 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...