/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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-WP.epf -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-507b705 [2020-09-11 20:25:34,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-11 20:25:34,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-11 20:25:34,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-11 20:25:34,447 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-11 20:25:34,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-11 20:25:34,458 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-11 20:25:34,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-11 20:25:34,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-11 20:25:34,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-11 20:25:34,469 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-11 20:25:34,470 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-11 20:25:34,470 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-11 20:25:34,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-11 20:25:34,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-11 20:25:34,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-11 20:25:34,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-11 20:25:34,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-11 20:25:34,481 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-11 20:25:34,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-11 20:25:34,492 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-11 20:25:34,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-11 20:25:34,494 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-11 20:25:34,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-11 20:25:34,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-11 20:25:34,512 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-11 20:25:34,512 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-11 20:25:34,513 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-11 20:25:34,514 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-11 20:25:34,517 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-11 20:25:34,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-11 20:25:34,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-11 20:25:34,522 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-11 20:25:34,523 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-11 20:25:34,524 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-11 20:25:34,524 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-11 20:25:34,525 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-11 20:25:34,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-11 20:25:34,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-11 20:25:34,527 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-11 20:25:34,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-11 20:25:34,529 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2020-09-11 20:25:34,574 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-11 20:25:34,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-11 20:25:34,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-11 20:25:34,577 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-11 20:25:34,577 INFO L138 SettingsManager]: * Use SBE=true [2020-09-11 20:25:34,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-11 20:25:34,578 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-11 20:25:34,578 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-11 20:25:34,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-11 20:25:34,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-11 20:25:34,579 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-11 20:25:34,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-11 20:25:34,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-11 20:25:34,580 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-11 20:25:34,580 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-11 20:25:34,581 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-11 20:25:34,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-11 20:25:34,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-11 20:25:34,581 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-11 20:25:34,581 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-11 20:25:34,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-11 20:25:34,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 20:25:34,582 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-11 20:25:34,582 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-11 20:25:34,582 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-11 20:25:34,583 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-11 20:25:34,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-11 20:25:34,583 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-09-11 20:25:34,583 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-11 20:25:34,583 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-11 20:25:34,584 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-09-11 20:25:35,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-11 20:25:35,087 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-11 20:25:35,090 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-11 20:25:35,092 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-11 20:25:35,092 INFO L275 PluginConnector]: CDTParser initialized [2020-09-11 20:25:35,093 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2020-09-11 20:25:35,171 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7aa027fb6/1de2cd49a52a4fd697c6e7b38eab7687/FLAG7b2d6ed69 [2020-09-11 20:25:35,757 INFO L306 CDTParser]: Found 1 translation units. [2020-09-11 20:25:35,758 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-1.i [2020-09-11 20:25:35,774 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7aa027fb6/1de2cd49a52a4fd697c6e7b38eab7687/FLAG7b2d6ed69 [2020-09-11 20:25:36,046 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7aa027fb6/1de2cd49a52a4fd697c6e7b38eab7687 [2020-09-11 20:25:36,060 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-11 20:25:36,069 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-11 20:25:36,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-11 20:25:36,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-11 20:25:36,076 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-11 20:25:36,077 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:25:36" (1/1) ... [2020-09-11 20:25:36,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@297cf83c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:36, skipping insertion in model container [2020-09-11 20:25:36,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:25:36" (1/1) ... [2020-09-11 20:25:36,092 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-11 20:25:36,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-11 20:25:36,672 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 20:25:36,688 INFO L203 MainTranslator]: Completed pre-run [2020-09-11 20:25:36,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 20:25:36,815 INFO L208 MainTranslator]: Completed translation [2020-09-11 20:25:36,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:36 WrapperNode [2020-09-11 20:25:36,816 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-11 20:25:36,817 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-11 20:25:36,817 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-11 20:25:36,817 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-11 20:25:36,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:36" (1/1) ... [2020-09-11 20:25:36,847 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:36" (1/1) ... [2020-09-11 20:25:36,872 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-11 20:25:36,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-11 20:25:36,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-11 20:25:36,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-11 20:25:36,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:36" (1/1) ... [2020-09-11 20:25:36,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:36" (1/1) ... [2020-09-11 20:25:36,885 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:36" (1/1) ... [2020-09-11 20:25:36,885 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:36" (1/1) ... [2020-09-11 20:25:36,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:36" (1/1) ... [2020-09-11 20:25:36,897 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:36" (1/1) ... [2020-09-11 20:25:36,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:36" (1/1) ... [2020-09-11 20:25:36,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-11 20:25:36,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-11 20:25:36,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-11 20:25:36,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-11 20:25:36,904 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:36" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 20:25:36,976 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-11 20:25:36,977 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-11 20:25:36,977 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-11 20:25:36,977 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-11 20:25:36,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-11 20:25:36,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-11 20:25:36,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-11 20:25:36,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-11 20:25:36,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-11 20:25:36,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-11 20:25:36,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-11 20:25:36,986 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-11 20:25:37,355 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-11 20:25:37,356 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-11 20:25:37,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:25:37 BoogieIcfgContainer [2020-09-11 20:25:37,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-11 20:25:37,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-11 20:25:37,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-11 20:25:37,371 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-11 20:25:37,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 08:25:36" (1/3) ... [2020-09-11 20:25:37,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c0185a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:25:37, skipping insertion in model container [2020-09-11 20:25:37,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:36" (2/3) ... [2020-09-11 20:25:37,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c0185a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:25:37, skipping insertion in model container [2020-09-11 20:25:37,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:25:37" (3/3) ... [2020-09-11 20:25:37,377 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2020-09-11 20:25:37,387 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-11 20:25:37,387 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-11 20:25:37,396 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-11 20:25:37,397 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-11 20:25:37,423 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,424 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,424 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,424 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,425 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,425 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,425 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,426 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,426 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,426 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,427 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,427 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,427 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,427 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,428 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,428 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,428 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,428 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,429 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,429 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,429 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,430 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,430 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,430 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,431 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,431 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,431 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,431 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,436 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,436 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,436 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,437 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,437 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,437 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,446 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,446 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,446 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,447 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,447 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,447 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:37,468 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-11 20:25:37,490 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-11 20:25:37,490 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-11 20:25:37,491 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-11 20:25:37,491 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-11 20:25:37,492 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-11 20:25:37,492 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-11 20:25:37,492 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-11 20:25:37,492 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-11 20:25:37,508 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-11 20:25:37,510 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-11 20:25:37,556 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-11 20:25:37,557 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 20:25:37,563 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-11 20:25:37,566 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-11 20:25:37,584 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-11 20:25:37,585 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 20:25:37,586 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-11 20:25:37,588 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-11 20:25:37,589 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-11 20:25:38,609 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-11 20:25:38,824 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-11 20:25:38,824 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-11 20:25:38,830 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-11 20:25:38,843 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-11 20:25:38,846 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-11 20:25:38,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-11 20:25:38,854 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:38,855 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-11 20:25:38,855 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:38,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:38,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-11 20:25:38,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:38,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382534782] [2020-09-11 20:25:38,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:39,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:39,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382534782] [2020-09-11 20:25:39,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 20:25:39,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-11 20:25:39,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1887860528] [2020-09-11 20:25:39,155 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:39,164 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:39,204 INFO L274 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-09-11 20:25:39,205 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:39,207 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-11 20:25:39,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-11 20:25:39,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:39,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-11 20:25:39,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-11 20:25:39,229 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-11 20:25:39,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:39,292 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-11 20:25:39,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-11 20:25:39,294 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-11 20:25:39,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:39,308 INFO L225 Difference]: With dead ends: 75 [2020-09-11 20:25:39,309 INFO L226 Difference]: Without dead ends: 42 [2020-09-11 20:25:39,311 INFO L675 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 [2020-09-11 20:25:39,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-11 20:25:39,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-11 20:25:39,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 20:25:39,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-11 20:25:39,358 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-11 20:25:39,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:39,358 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-11 20:25:39,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-11 20:25:39,358 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-11 20:25:39,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 20:25:39,359 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:39,360 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:39,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-11 20:25:39,360 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:39,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:39,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-11 20:25:39,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:39,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864860962] [2020-09-11 20:25:39,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:39,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864860962] [2020-09-11 20:25:39,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 20:25:39,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 20:25:39,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1216094866] [2020-09-11 20:25:39,522 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:39,523 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:39,526 INFO L274 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-09-11 20:25:39,527 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:39,549 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-11 20:25:39,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 20:25:39,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:39,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 20:25:39,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 20:25:39,552 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-11 20:25:39,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:39,586 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-11 20:25:39,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-11 20:25:39,586 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-11 20:25:39,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:39,588 INFO L225 Difference]: With dead ends: 56 [2020-09-11 20:25:39,588 INFO L226 Difference]: Without dead ends: 50 [2020-09-11 20:25:39,589 INFO L675 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 [2020-09-11 20:25:39,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-11 20:25:39,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-11 20:25:39,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 20:25:39,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-11 20:25:39,597 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-11 20:25:39,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:39,598 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-11 20:25:39,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 20:25:39,599 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-11 20:25:39,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 20:25:39,599 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:39,600 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:39,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-11 20:25:39,600 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:39,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:39,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-11 20:25:39,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:39,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244474169] [2020-09-11 20:25:39,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:39,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:39,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:39,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244474169] [2020-09-11 20:25:39,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 20:25:39,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 20:25:39,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1916885010] [2020-09-11 20:25:39,686 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:39,687 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:39,690 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-09-11 20:25:39,690 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:39,729 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:39,729 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:39,746 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [466#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-09-11 20:25:39,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-11 20:25:39,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:39,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-11 20:25:39,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-11 20:25:39,748 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 7 states. [2020-09-11 20:25:39,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:39,875 INFO L93 Difference]: Finished difference Result 62 states and 148 transitions. [2020-09-11 20:25:39,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 20:25:39,875 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-09-11 20:25:39,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:39,876 INFO L225 Difference]: With dead ends: 62 [2020-09-11 20:25:39,877 INFO L226 Difference]: Without dead ends: 44 [2020-09-11 20:25:39,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-11 20:25:39,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-11 20:25:39,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-09-11 20:25:39,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-11 20:25:39,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-11 20:25:39,884 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 10 [2020-09-11 20:25:39,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:39,884 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-11 20:25:39,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-11 20:25:39,884 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-11 20:25:39,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 20:25:39,885 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:39,885 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:39,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-11 20:25:39,886 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:39,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:39,886 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 2 times [2020-09-11 20:25:39,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:39,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461697813] [2020-09-11 20:25:39,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:39,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461697813] [2020-09-11 20:25:39,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111313307] [2020-09-11 20:25:39,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 20:25:40,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:25:40,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:40,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 20:25:40,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:40,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:40,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:40,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-11 20:25:40,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [121987613] [2020-09-11 20:25:40,087 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:40,088 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:40,091 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 31 transitions. [2020-09-11 20:25:40,091 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:40,111 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:40,112 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:40,131 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:40,132 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:40,144 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:40,145 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:40,156 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:40,157 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:40,180 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:40,180 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:40,185 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:40,185 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:40,196 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:40,197 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:40,206 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:40,206 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:40,217 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [644#(and (<= ~j~0 4) (<= ~i~0 16))] [2020-09-11 20:25:40,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 20:25:40,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:40,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 20:25:40,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-11 20:25:40,218 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 8 states. [2020-09-11 20:25:40,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:40,346 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-09-11 20:25:40,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 20:25:40,347 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 20:25:40,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:40,348 INFO L225 Difference]: With dead ends: 56 [2020-09-11 20:25:40,348 INFO L226 Difference]: Without dead ends: 50 [2020-09-11 20:25:40,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-11 20:25:40,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-11 20:25:40,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-11 20:25:40,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 20:25:40,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 104 transitions. [2020-09-11 20:25:40,356 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 104 transitions. Word has length 11 [2020-09-11 20:25:40,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:40,356 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 104 transitions. [2020-09-11 20:25:40,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 20:25:40,357 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 104 transitions. [2020-09-11 20:25:40,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 20:25:40,358 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:40,358 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:40,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:40,572 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:40,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:40,573 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 3 times [2020-09-11 20:25:40,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:40,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423801679] [2020-09-11 20:25:40,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:40,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:40,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423801679] [2020-09-11 20:25:40,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321179473] [2020-09-11 20:25:40,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 20:25:40,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 20:25:40,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:40,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 20:25:40,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:40,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:40,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-11 20:25:40,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1426736575] [2020-09-11 20:25:40,778 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:40,779 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:40,781 INFO L274 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-09-11 20:25:40,781 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:40,796 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:40,797 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:40,827 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:40,827 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:40,828 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [832#(and (<= ~j~0 6) (<= ~i~0 16))] [2020-09-11 20:25:40,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 20:25:40,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:40,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 20:25:40,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-11 20:25:40,830 INFO L87 Difference]: Start difference. First operand 42 states and 104 transitions. Second operand 8 states. [2020-09-11 20:25:41,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:41,045 INFO L93 Difference]: Finished difference Result 66 states and 159 transitions. [2020-09-11 20:25:41,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 20:25:41,045 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 20:25:41,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:41,047 INFO L225 Difference]: With dead ends: 66 [2020-09-11 20:25:41,047 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 20:25:41,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-09-11 20:25:41,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 20:25:41,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-09-11 20:25:41,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-11 20:25:41,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 91 transitions. [2020-09-11 20:25:41,053 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 91 transitions. Word has length 11 [2020-09-11 20:25:41,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:41,054 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 91 transitions. [2020-09-11 20:25:41,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 20:25:41,054 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 91 transitions. [2020-09-11 20:25:41,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 20:25:41,055 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:41,055 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:41,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:41,261 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:41,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:41,262 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 4 times [2020-09-11 20:25:41,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:41,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389326450] [2020-09-11 20:25:41,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:41,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:41,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389326450] [2020-09-11 20:25:41,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905208011] [2020-09-11 20:25:41,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 20:25:41,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:25:41,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:41,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 20:25:41,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:41,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:41,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:41,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-11 20:25:41,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1740955982] [2020-09-11 20:25:41,463 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:41,464 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:41,471 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-09-11 20:25:41,472 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:41,481 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:41,482 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:41,535 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:41,535 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:41,562 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1034#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-09-11 20:25:41,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 20:25:41,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:41,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 20:25:41,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-11 20:25:41,563 INFO L87 Difference]: Start difference. First operand 38 states and 91 transitions. Second operand 9 states. [2020-09-11 20:25:41,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:41,750 INFO L93 Difference]: Finished difference Result 64 states and 149 transitions. [2020-09-11 20:25:41,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 20:25:41,752 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 20:25:41,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:41,753 INFO L225 Difference]: With dead ends: 64 [2020-09-11 20:25:41,754 INFO L226 Difference]: Without dead ends: 58 [2020-09-11 20:25:41,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-09-11 20:25:41,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-11 20:25:41,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-11 20:25:41,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-11 20:25:41,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 112 transitions. [2020-09-11 20:25:41,765 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 112 transitions. Word has length 12 [2020-09-11 20:25:41,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:41,766 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 112 transitions. [2020-09-11 20:25:41,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 20:25:41,766 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 112 transitions. [2020-09-11 20:25:41,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 20:25:41,767 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:41,767 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:41,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:41,981 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:41,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:41,982 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 5 times [2020-09-11 20:25:41,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:41,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413134152] [2020-09-11 20:25:41,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:42,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:42,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413134152] [2020-09-11 20:25:42,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433705713] [2020-09-11 20:25:42,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 20:25:42,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:25:42,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:42,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 20:25:42,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:42,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:42,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-11 20:25:42,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [331806673] [2020-09-11 20:25:42,153 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:42,154 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:42,156 INFO L274 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-09-11 20:25:42,157 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:42,174 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:42,175 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:42,207 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:42,207 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:42,209 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1244#(and (<= ~j~0 10) (<= ~i~0 16))] [2020-09-11 20:25:42,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 20:25:42,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:42,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 20:25:42,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-11 20:25:42,210 INFO L87 Difference]: Start difference. First operand 45 states and 112 transitions. Second operand 9 states. [2020-09-11 20:25:42,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:42,471 INFO L93 Difference]: Finished difference Result 63 states and 155 transitions. [2020-09-11 20:25:42,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 20:25:42,472 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 20:25:42,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:42,473 INFO L225 Difference]: With dead ends: 63 [2020-09-11 20:25:42,473 INFO L226 Difference]: Without dead ends: 51 [2020-09-11 20:25:42,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-09-11 20:25:42,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-11 20:25:42,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2020-09-11 20:25:42,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-11 20:25:42,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-11 20:25:42,478 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 12 [2020-09-11 20:25:42,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:42,479 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-11 20:25:42,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 20:25:42,479 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-11 20:25:42,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 20:25:42,480 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:42,480 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:42,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:42,681 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:42,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:42,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 6 times [2020-09-11 20:25:42,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:42,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413094770] [2020-09-11 20:25:42,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:42,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413094770] [2020-09-11 20:25:42,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116299290] [2020-09-11 20:25:42,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 20:25:42,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 20:25:42,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:42,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 20:25:42,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:42,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:42,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:42,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 20:25:42,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2101526600] [2020-09-11 20:25:42,868 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:42,870 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:42,875 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-09-11 20:25:42,875 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:42,888 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:42,888 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:42,908 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:42,908 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:42,924 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:42,925 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:42,932 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:42,933 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:42,955 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:42,955 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:42,957 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:42,958 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:42,973 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:42,973 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:42,981 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:42,981 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:42,991 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1447#(and (<= ~j~0 4) (<= ~i~0 16))] [2020-09-11 20:25:42,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 20:25:42,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:42,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 20:25:42,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 20:25:42,992 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 10 states. [2020-09-11 20:25:43,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:43,157 INFO L93 Difference]: Finished difference Result 60 states and 140 transitions. [2020-09-11 20:25:43,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 20:25:43,158 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 20:25:43,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:43,159 INFO L225 Difference]: With dead ends: 60 [2020-09-11 20:25:43,159 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 20:25:43,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-11 20:25:43,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 20:25:43,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-11 20:25:43,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 20:25:43,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-11 20:25:43,165 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 13 [2020-09-11 20:25:43,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:43,165 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-11 20:25:43,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 20:25:43,166 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-11 20:25:43,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 20:25:43,167 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:43,167 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:43,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:43,379 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:43,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:43,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 7 times [2020-09-11 20:25:43,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:43,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934265623] [2020-09-11 20:25:43,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:43,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:43,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934265623] [2020-09-11 20:25:43,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968937594] [2020-09-11 20:25:43,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 20:25:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:43,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 20:25:43,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:43,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:43,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:43,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 20:25:43,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1899109817] [2020-09-11 20:25:43,568 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:43,570 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:43,574 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-09-11 20:25:43,574 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:43,576 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:43,576 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:43,627 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:43,627 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:43,644 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1659#(and (<= ~j~0 6) (<= ~i~0 16))] [2020-09-11 20:25:43,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 20:25:43,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:43,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 20:25:43,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-11 20:25:43,646 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 10 states. [2020-09-11 20:25:43,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:43,903 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-11 20:25:43,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 20:25:43,903 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 20:25:43,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:43,904 INFO L225 Difference]: With dead ends: 74 [2020-09-11 20:25:43,904 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 20:25:43,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2020-09-11 20:25:43,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 20:25:43,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-11 20:25:43,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-11 20:25:43,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 120 transitions. [2020-09-11 20:25:43,909 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 120 transitions. Word has length 13 [2020-09-11 20:25:43,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:43,910 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 120 transitions. [2020-09-11 20:25:43,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 20:25:43,910 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 120 transitions. [2020-09-11 20:25:43,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 20:25:43,911 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:43,911 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:44,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:44,123 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:44,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:44,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 8 times [2020-09-11 20:25:44,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:44,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887713892] [2020-09-11 20:25:44,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:44,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:44,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:44,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887713892] [2020-09-11 20:25:44,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990207595] [2020-09-11 20:25:44,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 20:25:44,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:25:44,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:44,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 20:25:44,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:44,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:44,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:44,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 20:25:44,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [18514208] [2020-09-11 20:25:44,286 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:44,287 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:44,292 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-09-11 20:25:44,293 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:44,294 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:44,294 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:44,324 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:44,324 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:44,357 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1897#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-09-11 20:25:44,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 20:25:44,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:44,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 20:25:44,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-11 20:25:44,358 INFO L87 Difference]: Start difference. First operand 48 states and 120 transitions. Second operand 10 states. [2020-09-11 20:25:44,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:44,685 INFO L93 Difference]: Finished difference Result 74 states and 179 transitions. [2020-09-11 20:25:44,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 20:25:44,686 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 20:25:44,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:44,687 INFO L225 Difference]: With dead ends: 74 [2020-09-11 20:25:44,687 INFO L226 Difference]: Without dead ends: 62 [2020-09-11 20:25:44,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2020-09-11 20:25:44,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-11 20:25:44,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2020-09-11 20:25:44,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 20:25:44,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-11 20:25:44,692 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 13 [2020-09-11 20:25:44,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:44,692 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-11 20:25:44,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 20:25:44,692 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-11 20:25:44,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 20:25:44,693 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:44,693 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:44,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-11 20:25:44,905 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:44,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:44,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 9 times [2020-09-11 20:25:44,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:44,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021055051] [2020-09-11 20:25:44,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:45,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:45,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021055051] [2020-09-11 20:25:45,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605132978] [2020-09-11 20:25:45,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 20:25:45,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 20:25:45,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:45,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 20:25:45,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:45,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:45,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:45,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 20:25:45,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2120356170] [2020-09-11 20:25:45,128 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:45,130 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:45,132 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2020-09-11 20:25:45,132 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:45,134 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:45,134 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:45,175 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:45,175 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:45,229 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2131#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-09-11 20:25:45,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 20:25:45,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:45,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 20:25:45,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-11 20:25:45,231 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 11 states. [2020-09-11 20:25:45,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:45,418 INFO L93 Difference]: Finished difference Result 70 states and 162 transitions. [2020-09-11 20:25:45,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 20:25:45,419 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 20:25:45,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:45,420 INFO L225 Difference]: With dead ends: 70 [2020-09-11 20:25:45,420 INFO L226 Difference]: Without dead ends: 64 [2020-09-11 20:25:45,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2020-09-11 20:25:45,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-11 20:25:45,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2020-09-11 20:25:45,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-11 20:25:45,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 120 transitions. [2020-09-11 20:25:45,432 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 120 transitions. Word has length 14 [2020-09-11 20:25:45,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:45,432 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 120 transitions. [2020-09-11 20:25:45,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 20:25:45,432 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 120 transitions. [2020-09-11 20:25:45,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 20:25:45,435 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:45,435 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:45,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-09-11 20:25:45,637 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:45,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:45,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 10 times [2020-09-11 20:25:45,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:45,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959142066] [2020-09-11 20:25:45,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:45,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959142066] [2020-09-11 20:25:45,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643651207] [2020-09-11 20:25:45,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 20:25:45,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:25:45,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:45,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 20:25:45,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:45,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:45,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:45,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 20:25:45,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [799199850] [2020-09-11 20:25:45,837 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:45,838 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:45,840 INFO L274 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-09-11 20:25:45,841 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:45,842 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:45,842 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:45,873 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:45,874 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:45,888 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2367#(and (<= ~j~0 10) (<= ~i~0 16))] [2020-09-11 20:25:45,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 20:25:45,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:45,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 20:25:45,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-11 20:25:45,889 INFO L87 Difference]: Start difference. First operand 49 states and 120 transitions. Second operand 11 states. [2020-09-11 20:25:46,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:46,163 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-11 20:25:46,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 20:25:46,164 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 20:25:46,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:46,165 INFO L225 Difference]: With dead ends: 69 [2020-09-11 20:25:46,165 INFO L226 Difference]: Without dead ends: 63 [2020-09-11 20:25:46,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2020-09-11 20:25:46,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-11 20:25:46,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-09-11 20:25:46,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-11 20:25:46,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 128 transitions. [2020-09-11 20:25:46,170 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 128 transitions. Word has length 14 [2020-09-11 20:25:46,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:46,170 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 128 transitions. [2020-09-11 20:25:46,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 20:25:46,170 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 128 transitions. [2020-09-11 20:25:46,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 20:25:46,171 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:46,171 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:46,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:46,384 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:46,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:46,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 11 times [2020-09-11 20:25:46,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:46,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298734013] [2020-09-11 20:25:46,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:46,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:46,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298734013] [2020-09-11 20:25:46,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401345438] [2020-09-11 20:25:46,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 20:25:46,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 20:25:46,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:46,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 20:25:46,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:46,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:46,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:46,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 20:25:46,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [990886310] [2020-09-11 20:25:46,540 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:46,542 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:46,544 INFO L274 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-09-11 20:25:46,544 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:46,545 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:46,545 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:46,576 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:46,576 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:46,589 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2610#(and (<= ~j~0 12) (<= ~i~0 16))] [2020-09-11 20:25:46,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 20:25:46,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:46,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 20:25:46,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-11 20:25:46,591 INFO L87 Difference]: Start difference. First operand 51 states and 128 transitions. Second operand 11 states. [2020-09-11 20:25:46,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:46,972 INFO L93 Difference]: Finished difference Result 69 states and 171 transitions. [2020-09-11 20:25:46,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 20:25:46,972 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 20:25:46,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:46,973 INFO L225 Difference]: With dead ends: 69 [2020-09-11 20:25:46,973 INFO L226 Difference]: Without dead ends: 57 [2020-09-11 20:25:46,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-09-11 20:25:46,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-11 20:25:46,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2020-09-11 20:25:46,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 20:25:46,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-11 20:25:46,977 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 14 [2020-09-11 20:25:46,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:46,977 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-11 20:25:46,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 20:25:46,978 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-11 20:25:46,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 20:25:46,978 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:46,978 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:47,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:47,190 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:47,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:47,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 12 times [2020-09-11 20:25:47,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:47,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158092400] [2020-09-11 20:25:47,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:47,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158092400] [2020-09-11 20:25:47,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415168126] [2020-09-11 20:25:47,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 20:25:47,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 20:25:47,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:47,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 20:25:47,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:47,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:47,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 20:25:47,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [929434687] [2020-09-11 20:25:47,369 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:47,370 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:47,373 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-09-11 20:25:47,373 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:47,387 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:47,387 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:47,405 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:47,405 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:47,419 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:47,419 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:47,423 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:47,424 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:47,442 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:47,442 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:47,445 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:47,446 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:47,458 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:47,458 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:47,464 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:47,464 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:47,474 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2843#(and (<= ~j~0 4) (<= ~i~0 16))] [2020-09-11 20:25:47,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 20:25:47,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:47,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 20:25:47,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-11 20:25:47,475 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 12 states. [2020-09-11 20:25:47,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:47,689 INFO L93 Difference]: Finished difference Result 66 states and 154 transitions. [2020-09-11 20:25:47,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 20:25:47,691 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 20:25:47,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:47,692 INFO L225 Difference]: With dead ends: 66 [2020-09-11 20:25:47,692 INFO L226 Difference]: Without dead ends: 60 [2020-09-11 20:25:47,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-11 20:25:47,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-11 20:25:47,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-11 20:25:47,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 20:25:47,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-11 20:25:47,696 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 15 [2020-09-11 20:25:47,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:47,696 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-11 20:25:47,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 20:25:47,699 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-11 20:25:47,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 20:25:47,702 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:47,702 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:47,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-11 20:25:47,903 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:47,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:47,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 13 times [2020-09-11 20:25:47,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:47,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419228611] [2020-09-11 20:25:47,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:47,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:48,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:48,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419228611] [2020-09-11 20:25:48,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387313666] [2020-09-11 20:25:48,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 20:25:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:48,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 20:25:48,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:48,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:48,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:48,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 20:25:48,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [477720459] [2020-09-11 20:25:48,097 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:48,099 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:48,102 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-11 20:25:48,102 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:48,104 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:48,104 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:48,133 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:48,134 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:48,150 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3081#(and (<= ~j~0 6) (<= ~i~0 16))] [2020-09-11 20:25:48,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 20:25:48,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:48,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 20:25:48,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-11 20:25:48,152 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 12 states. [2020-09-11 20:25:48,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:48,437 INFO L93 Difference]: Finished difference Result 82 states and 188 transitions. [2020-09-11 20:25:48,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 20:25:48,438 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 20:25:48,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:48,439 INFO L225 Difference]: With dead ends: 82 [2020-09-11 20:25:48,439 INFO L226 Difference]: Without dead ends: 76 [2020-09-11 20:25:48,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2020-09-11 20:25:48,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-11 20:25:48,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-11 20:25:48,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 20:25:48,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 128 transitions. [2020-09-11 20:25:48,443 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 128 transitions. Word has length 15 [2020-09-11 20:25:48,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:48,443 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 128 transitions. [2020-09-11 20:25:48,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 20:25:48,443 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 128 transitions. [2020-09-11 20:25:48,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 20:25:48,444 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:48,444 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:48,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-11 20:25:48,645 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:48,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:48,646 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 14 times [2020-09-11 20:25:48,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:48,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651706188] [2020-09-11 20:25:48,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:48,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:48,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:48,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651706188] [2020-09-11 20:25:48,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610970551] [2020-09-11 20:25:48,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 20:25:48,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:25:48,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:48,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 20:25:48,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:48,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:48,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 20:25:48,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1906428593] [2020-09-11 20:25:48,835 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:48,837 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:48,841 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-11 20:25:48,841 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:48,854 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:48,854 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:48,890 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:48,891 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:48,892 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3347#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-09-11 20:25:48,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 20:25:48,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:48,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 20:25:48,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-09-11 20:25:48,893 INFO L87 Difference]: Start difference. First operand 52 states and 128 transitions. Second operand 12 states. [2020-09-11 20:25:49,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:49,295 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-11 20:25:49,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 20:25:49,296 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 20:25:49,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:49,297 INFO L225 Difference]: With dead ends: 81 [2020-09-11 20:25:49,298 INFO L226 Difference]: Without dead ends: 75 [2020-09-11 20:25:49,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2020-09-11 20:25:49,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-11 20:25:49,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-09-11 20:25:49,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 20:25:49,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 136 transitions. [2020-09-11 20:25:49,302 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 136 transitions. Word has length 15 [2020-09-11 20:25:49,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:49,302 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 136 transitions. [2020-09-11 20:25:49,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 20:25:49,302 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 136 transitions. [2020-09-11 20:25:49,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 20:25:49,303 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:49,303 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:49,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-11 20:25:49,513 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:49,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:49,514 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 15 times [2020-09-11 20:25:49,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:49,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393109580] [2020-09-11 20:25:49,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:49,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:49,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:49,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393109580] [2020-09-11 20:25:49,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237851375] [2020-09-11 20:25:49,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 20:25:49,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 20:25:49,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:49,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 20:25:49,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:49,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:49,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:49,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 20:25:49,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1706700227] [2020-09-11 20:25:49,683 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:49,685 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:49,687 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-11 20:25:49,687 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:49,688 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:49,688 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:49,717 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:49,718 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:49,727 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3620#(and (<= ~j~0 10) (<= ~i~0 16))] [2020-09-11 20:25:49,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 20:25:49,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:49,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 20:25:49,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-09-11 20:25:49,729 INFO L87 Difference]: Start difference. First operand 54 states and 136 transitions. Second operand 12 states. [2020-09-11 20:25:50,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:50,112 INFO L93 Difference]: Finished difference Result 82 states and 199 transitions. [2020-09-11 20:25:50,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 20:25:50,113 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 20:25:50,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:50,114 INFO L225 Difference]: With dead ends: 82 [2020-09-11 20:25:50,114 INFO L226 Difference]: Without dead ends: 70 [2020-09-11 20:25:50,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-09-11 20:25:50,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-11 20:25:50,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2020-09-11 20:25:50,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 20:25:50,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-11 20:25:50,118 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 15 [2020-09-11 20:25:50,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:50,118 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-11 20:25:50,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 20:25:50,118 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-11 20:25:50,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 20:25:50,119 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:50,119 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:50,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:50,328 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:50,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:50,328 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 16 times [2020-09-11 20:25:50,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:50,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260256810] [2020-09-11 20:25:50,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:50,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260256810] [2020-09-11 20:25:50,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745901792] [2020-09-11 20:25:50,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 20:25:50,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:25:50,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:50,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 20:25:50,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:50,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:50,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:50,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 20:25:50,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [582247030] [2020-09-11 20:25:50,556 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:50,559 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:50,579 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 32 transitions. [2020-09-11 20:25:50,579 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:50,600 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:50,600 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:50,642 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:50,642 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:50,645 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3886#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-09-11 20:25:50,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 20:25:50,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:50,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 20:25:50,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-09-11 20:25:50,646 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 13 states. [2020-09-11 20:25:50,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:50,893 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-11 20:25:50,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 20:25:50,893 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 20:25:50,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:50,894 INFO L225 Difference]: With dead ends: 78 [2020-09-11 20:25:50,894 INFO L226 Difference]: Without dead ends: 72 [2020-09-11 20:25:50,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2020-09-11 20:25:50,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-11 20:25:50,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-09-11 20:25:50,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-11 20:25:50,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 130 transitions. [2020-09-11 20:25:50,899 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 130 transitions. Word has length 16 [2020-09-11 20:25:50,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:50,899 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 130 transitions. [2020-09-11 20:25:50,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 20:25:50,900 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 130 transitions. [2020-09-11 20:25:50,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 20:25:50,900 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:50,900 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:51,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-11 20:25:51,112 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:51,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:51,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 17 times [2020-09-11 20:25:51,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:51,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22714386] [2020-09-11 20:25:51,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:51,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:51,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22714386] [2020-09-11 20:25:51,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618967093] [2020-09-11 20:25:51,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 20:25:51,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 20:25:51,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:51,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 20:25:51,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:51,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:51,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 20:25:51,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [940397510] [2020-09-11 20:25:51,308 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:51,310 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:51,314 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-11 20:25:51,314 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:51,315 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:51,315 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:51,356 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:51,356 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:51,372 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4150#(and (<= ~j~0 10) (<= ~i~0 16))] [2020-09-11 20:25:51,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 20:25:51,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:51,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 20:25:51,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-11 20:25:51,374 INFO L87 Difference]: Start difference. First operand 53 states and 130 transitions. Second operand 13 states. [2020-09-11 20:25:51,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:51,716 INFO L93 Difference]: Finished difference Result 75 states and 176 transitions. [2020-09-11 20:25:51,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 20:25:51,716 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 20:25:51,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:51,717 INFO L225 Difference]: With dead ends: 75 [2020-09-11 20:25:51,717 INFO L226 Difference]: Without dead ends: 69 [2020-09-11 20:25:51,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-09-11 20:25:51,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-11 20:25:51,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-11 20:25:51,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-11 20:25:51,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-09-11 20:25:51,720 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 16 [2020-09-11 20:25:51,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:51,720 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-09-11 20:25:51,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 20:25:51,721 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-09-11 20:25:51,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 20:25:51,721 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:51,721 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:51,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:51,929 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:51,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:51,930 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 18 times [2020-09-11 20:25:51,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:51,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472952357] [2020-09-11 20:25:51,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:51,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:52,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:52,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472952357] [2020-09-11 20:25:52,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814876844] [2020-09-11 20:25:52,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 20:25:52,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 20:25:52,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:52,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 20:25:52,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:52,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:52,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 20:25:52,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [524728359] [2020-09-11 20:25:52,121 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:52,122 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:52,125 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-11 20:25:52,125 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:52,126 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:52,126 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:52,156 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:52,157 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:52,169 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4419#(and (<= ~j~0 12) (<= ~i~0 16))] [2020-09-11 20:25:52,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 20:25:52,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:52,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 20:25:52,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-11 20:25:52,170 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 13 states. [2020-09-11 20:25:52,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:52,637 INFO L93 Difference]: Finished difference Result 75 states and 179 transitions. [2020-09-11 20:25:52,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 20:25:52,638 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 20:25:52,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:52,639 INFO L225 Difference]: With dead ends: 75 [2020-09-11 20:25:52,639 INFO L226 Difference]: Without dead ends: 69 [2020-09-11 20:25:52,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2020-09-11 20:25:52,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-11 20:25:52,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2020-09-11 20:25:52,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 20:25:52,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 144 transitions. [2020-09-11 20:25:52,648 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 144 transitions. Word has length 16 [2020-09-11 20:25:52,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:52,648 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 144 transitions. [2020-09-11 20:25:52,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 20:25:52,648 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 144 transitions. [2020-09-11 20:25:52,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 20:25:52,649 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:52,649 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:52,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:52,861 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:52,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:52,861 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 19 times [2020-09-11 20:25:52,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:52,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505600615] [2020-09-11 20:25:52,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:52,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:52,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505600615] [2020-09-11 20:25:52,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538781435] [2020-09-11 20:25:52,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:53,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 20:25:53,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:53,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:53,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 20:25:53,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2038026369] [2020-09-11 20:25:53,042 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:53,044 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:53,046 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-11 20:25:53,046 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:53,060 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:53,060 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:53,100 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:53,100 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:53,101 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4696#(and (<= ~j~0 14) (<= ~i~0 16))] [2020-09-11 20:25:53,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 20:25:53,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:53,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 20:25:53,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-09-11 20:25:53,102 INFO L87 Difference]: Start difference. First operand 57 states and 144 transitions. Second operand 13 states. [2020-09-11 20:25:53,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:53,557 INFO L93 Difference]: Finished difference Result 75 states and 187 transitions. [2020-09-11 20:25:53,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 20:25:53,557 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 20:25:53,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:53,559 INFO L225 Difference]: With dead ends: 75 [2020-09-11 20:25:53,559 INFO L226 Difference]: Without dead ends: 63 [2020-09-11 20:25:53,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=594, Unknown=0, NotChecked=0, Total=870 [2020-09-11 20:25:53,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-11 20:25:53,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-11 20:25:53,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 20:25:53,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-11 20:25:53,564 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 16 [2020-09-11 20:25:53,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:53,564 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-11 20:25:53,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 20:25:53,564 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-11 20:25:53,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 20:25:53,565 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:53,565 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:53,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-11 20:25:53,767 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:53,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:53,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 20 times [2020-09-11 20:25:53,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:53,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271907502] [2020-09-11 20:25:53,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:53,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:53,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271907502] [2020-09-11 20:25:53,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094516817] [2020-09-11 20:25:53,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:53,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:25:53,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:53,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 20:25:53,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:54,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:54,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:54,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 20:25:54,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [270942642] [2020-09-11 20:25:54,002 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:54,003 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:54,007 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 37 transitions. [2020-09-11 20:25:54,007 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:54,016 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:54,016 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:54,039 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:54,039 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:54,058 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:54,058 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:54,064 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:54,065 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:54,078 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:54,078 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:54,080 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:54,080 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:54,093 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:54,094 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:54,098 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:54,099 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:54,107 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4959#(and (<= ~j~0 4) (<= ~i~0 16))] [2020-09-11 20:25:54,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 20:25:54,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:54,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 20:25:54,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-11 20:25:54,108 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 14 states. [2020-09-11 20:25:54,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:54,405 INFO L93 Difference]: Finished difference Result 72 states and 168 transitions. [2020-09-11 20:25:54,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 20:25:54,405 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 20:25:54,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:54,406 INFO L225 Difference]: With dead ends: 72 [2020-09-11 20:25:54,407 INFO L226 Difference]: Without dead ends: 66 [2020-09-11 20:25:54,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2020-09-11 20:25:54,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-11 20:25:54,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-11 20:25:54,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 20:25:54,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-11 20:25:54,410 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 17 [2020-09-11 20:25:54,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:54,410 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-11 20:25:54,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 20:25:54,411 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-11 20:25:54,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 20:25:54,411 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:54,411 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:54,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:54,614 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:54,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:54,614 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 21 times [2020-09-11 20:25:54,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:54,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365273506] [2020-09-11 20:25:54,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:54,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:54,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365273506] [2020-09-11 20:25:54,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911461660] [2020-09-11 20:25:54,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:54,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 20:25:54,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:54,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 20:25:54,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:54,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:54,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:54,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 20:25:54,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [670436325] [2020-09-11 20:25:54,856 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:54,858 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:54,863 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-11 20:25:54,863 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:54,873 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:54,873 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:54,907 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:54,907 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:54,908 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5223#(and (<= ~j~0 6) (<= ~i~0 16))] [2020-09-11 20:25:54,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 20:25:54,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:54,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 20:25:54,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-09-11 20:25:54,909 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 14 states. [2020-09-11 20:25:55,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:55,260 INFO L93 Difference]: Finished difference Result 92 states and 210 transitions. [2020-09-11 20:25:55,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 20:25:55,260 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 20:25:55,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:55,261 INFO L225 Difference]: With dead ends: 92 [2020-09-11 20:25:55,261 INFO L226 Difference]: Without dead ends: 86 [2020-09-11 20:25:55,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=591, Unknown=0, NotChecked=0, Total=812 [2020-09-11 20:25:55,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-11 20:25:55,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2020-09-11 20:25:55,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 20:25:55,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 138 transitions. [2020-09-11 20:25:55,265 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 138 transitions. Word has length 17 [2020-09-11 20:25:55,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:55,265 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 138 transitions. [2020-09-11 20:25:55,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 20:25:55,265 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 138 transitions. [2020-09-11 20:25:55,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 20:25:55,265 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:55,266 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:55,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-11 20:25:55,469 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:55,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:55,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 22 times [2020-09-11 20:25:55,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:55,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88906080] [2020-09-11 20:25:55,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:55,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:55,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:55,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88906080] [2020-09-11 20:25:55,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23005668] [2020-09-11 20:25:55,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:55,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:25:55,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:55,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 20:25:55,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:55,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:55,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 20:25:55,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1533980314] [2020-09-11 20:25:55,672 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:55,673 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:55,677 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-11 20:25:55,678 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:55,678 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:55,679 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:55,707 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:55,708 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:55,717 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5519#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-09-11 20:25:55,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 20:25:55,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:55,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 20:25:55,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-11 20:25:55,718 INFO L87 Difference]: Start difference. First operand 56 states and 138 transitions. Second operand 14 states. [2020-09-11 20:25:56,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:56,179 INFO L93 Difference]: Finished difference Result 89 states and 206 transitions. [2020-09-11 20:25:56,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 20:25:56,180 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 20:25:56,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:56,181 INFO L225 Difference]: With dead ends: 89 [2020-09-11 20:25:56,181 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 20:25:56,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-09-11 20:25:56,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 20:25:56,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2020-09-11 20:25:56,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 20:25:56,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 144 transitions. [2020-09-11 20:25:56,185 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 144 transitions. Word has length 17 [2020-09-11 20:25:56,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:56,185 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 144 transitions. [2020-09-11 20:25:56,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 20:25:56,185 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 144 transitions. [2020-09-11 20:25:56,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 20:25:56,186 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:56,186 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:56,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-11 20:25:56,394 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:56,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:56,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 23 times [2020-09-11 20:25:56,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:56,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983740845] [2020-09-11 20:25:56,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:56,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:56,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:56,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983740845] [2020-09-11 20:25:56,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362896973] [2020-09-11 20:25:56,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:56,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 20:25:56,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:56,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 20:25:56,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:56,575 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:56,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:56,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 20:25:56,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1159244706] [2020-09-11 20:25:56,579 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:56,581 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:56,584 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-11 20:25:56,584 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:56,600 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:56,600 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:56,657 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:56,657 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:56,658 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5820#(and (<= ~j~0 10) (<= ~i~0 16))] [2020-09-11 20:25:56,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 20:25:56,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:56,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 20:25:56,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-09-11 20:25:56,659 INFO L87 Difference]: Start difference. First operand 58 states and 144 transitions. Second operand 14 states. [2020-09-11 20:25:57,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:57,187 INFO L93 Difference]: Finished difference Result 89 states and 209 transitions. [2020-09-11 20:25:57,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 20:25:57,188 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 20:25:57,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:57,189 INFO L225 Difference]: With dead ends: 89 [2020-09-11 20:25:57,189 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 20:25:57,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=315, Invalid=741, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 20:25:57,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 20:25:57,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-11 20:25:57,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-11 20:25:57,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 152 transitions. [2020-09-11 20:25:57,194 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 152 transitions. Word has length 17 [2020-09-11 20:25:57,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:57,194 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 152 transitions. [2020-09-11 20:25:57,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 20:25:57,194 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 152 transitions. [2020-09-11 20:25:57,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 20:25:57,195 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:57,195 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:57,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:57,401 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:57,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:57,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 24 times [2020-09-11 20:25:57,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:57,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696786631] [2020-09-11 20:25:57,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:57,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:57,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:57,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696786631] [2020-09-11 20:25:57,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597528847] [2020-09-11 20:25:57,514 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:57,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 20:25:57,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:57,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 20:25:57,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:57,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:57,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:57,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 20:25:57,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [141375782] [2020-09-11 20:25:57,581 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:57,583 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:57,585 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-11 20:25:57,586 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:57,602 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:57,602 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:57,642 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:57,642 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:57,643 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6129#(and (<= ~j~0 12) (<= ~i~0 16))] [2020-09-11 20:25:57,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 20:25:57,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:57,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 20:25:57,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-09-11 20:25:57,644 INFO L87 Difference]: Start difference. First operand 60 states and 152 transitions. Second operand 14 states. [2020-09-11 20:25:58,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:58,199 INFO L93 Difference]: Finished difference Result 90 states and 219 transitions. [2020-09-11 20:25:58,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 20:25:58,200 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 20:25:58,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:58,201 INFO L225 Difference]: With dead ends: 90 [2020-09-11 20:25:58,201 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 20:25:58,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=384, Invalid=806, Unknown=0, NotChecked=0, Total=1190 [2020-09-11 20:25:58,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 20:25:58,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 50. [2020-09-11 20:25:58,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 20:25:58,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-11 20:25:58,204 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 17 [2020-09-11 20:25:58,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:58,204 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-11 20:25:58,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 20:25:58,204 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-11 20:25:58,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 20:25:58,205 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:58,205 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:58,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-11 20:25:58,406 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:58,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:58,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 25 times [2020-09-11 20:25:58,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:58,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304781926] [2020-09-11 20:25:58,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:58,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:58,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304781926] [2020-09-11 20:25:58,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861016876] [2020-09-11 20:25:58,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:58,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:58,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 20:25:58,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:58,638 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:58,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:58,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 20:25:58,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [763705249] [2020-09-11 20:25:58,639 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:58,640 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:58,643 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 34 transitions. [2020-09-11 20:25:58,644 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:58,656 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:58,656 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:58,703 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:58,703 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:58,706 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6427#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-09-11 20:25:58,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 20:25:58,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:58,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 20:25:58,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-11 20:25:58,707 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 15 states. [2020-09-11 20:25:59,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:59,086 INFO L93 Difference]: Finished difference Result 86 states and 198 transitions. [2020-09-11 20:25:59,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 20:25:59,087 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 20:25:59,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:59,087 INFO L225 Difference]: With dead ends: 86 [2020-09-11 20:25:59,088 INFO L226 Difference]: Without dead ends: 80 [2020-09-11 20:25:59,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2020-09-11 20:25:59,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-11 20:25:59,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-09-11 20:25:59,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 20:25:59,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 140 transitions. [2020-09-11 20:25:59,092 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 140 transitions. Word has length 18 [2020-09-11 20:25:59,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:59,092 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 140 transitions. [2020-09-11 20:25:59,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 20:25:59,092 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 140 transitions. [2020-09-11 20:25:59,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 20:25:59,096 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:59,096 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:59,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:59,306 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:59,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:59,307 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 26 times [2020-09-11 20:25:59,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:59,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951176437] [2020-09-11 20:25:59,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:59,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:59,513 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:59,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951176437] [2020-09-11 20:25:59,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042188782] [2020-09-11 20:25:59,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:59,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:25:59,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:59,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 20:25:59,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:25:59,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:59,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 20:25:59,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [948536391] [2020-09-11 20:25:59,612 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:59,615 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:59,620 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-09-11 20:25:59,620 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:59,622 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:59,622 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:59,668 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:59,669 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:59,689 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6719#(and (<= ~j~0 10) (<= ~i~0 16))] [2020-09-11 20:25:59,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 20:25:59,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:59,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 20:25:59,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-09-11 20:25:59,690 INFO L87 Difference]: Start difference. First operand 57 states and 140 transitions. Second operand 15 states. [2020-09-11 20:26:00,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:00,100 INFO L93 Difference]: Finished difference Result 83 states and 194 transitions. [2020-09-11 20:26:00,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 20:26:00,101 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 20:26:00,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:00,102 INFO L225 Difference]: With dead ends: 83 [2020-09-11 20:26:00,102 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 20:26:00,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=639, Unknown=0, NotChecked=0, Total=870 [2020-09-11 20:26:00,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 20:26:00,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 59. [2020-09-11 20:26:00,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-11 20:26:00,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 146 transitions. [2020-09-11 20:26:00,105 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 146 transitions. Word has length 18 [2020-09-11 20:26:00,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:00,106 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 146 transitions. [2020-09-11 20:26:00,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 20:26:00,106 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 146 transitions. [2020-09-11 20:26:00,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 20:26:00,106 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:00,107 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:00,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-11 20:26:00,316 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:00,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:00,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 27 times [2020-09-11 20:26:00,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:00,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636503252] [2020-09-11 20:26:00,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:00,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:00,447 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:26:00,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636503252] [2020-09-11 20:26:00,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16305110] [2020-09-11 20:26:00,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:00,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 20:26:00,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:00,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 20:26:00,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:26:00,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:00,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 20:26:00,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [760768853] [2020-09-11 20:26:00,518 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:00,519 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:00,523 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-09-11 20:26:00,523 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:00,538 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:00,538 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:00,573 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:00,574 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:00,575 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7016#(and (<= ~j~0 12) (<= ~i~0 16))] [2020-09-11 20:26:00,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 20:26:00,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:00,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 20:26:00,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-11 20:26:00,576 INFO L87 Difference]: Start difference. First operand 59 states and 146 transitions. Second operand 15 states. [2020-09-11 20:26:01,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:01,065 INFO L93 Difference]: Finished difference Result 81 states and 192 transitions. [2020-09-11 20:26:01,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 20:26:01,066 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 20:26:01,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:01,067 INFO L225 Difference]: With dead ends: 81 [2020-09-11 20:26:01,067 INFO L226 Difference]: Without dead ends: 75 [2020-09-11 20:26:01,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2020-09-11 20:26:01,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-11 20:26:01,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-09-11 20:26:01,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-11 20:26:01,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 152 transitions. [2020-09-11 20:26:01,070 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 152 transitions. Word has length 18 [2020-09-11 20:26:01,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:01,071 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 152 transitions. [2020-09-11 20:26:01,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 20:26:01,071 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 152 transitions. [2020-09-11 20:26:01,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 20:26:01,071 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:01,072 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:01,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-11 20:26:01,273 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:01,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:01,273 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 28 times [2020-09-11 20:26:01,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:01,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568197395] [2020-09-11 20:26:01,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:01,415 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:26:01,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568197395] [2020-09-11 20:26:01,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129294927] [2020-09-11 20:26:01,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:01,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:26:01,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:01,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 20:26:01,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:01,502 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:26:01,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:01,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 20:26:01,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1649412040] [2020-09-11 20:26:01,503 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:01,504 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:01,508 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-09-11 20:26:01,508 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:01,520 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:01,520 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:01,549 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:01,549 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:01,562 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7319#(and (<= ~j~0 14) (<= ~i~0 16))] [2020-09-11 20:26:01,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 20:26:01,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:01,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 20:26:01,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-09-11 20:26:01,563 INFO L87 Difference]: Start difference. First operand 61 states and 152 transitions. Second operand 15 states. [2020-09-11 20:26:02,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:02,045 INFO L93 Difference]: Finished difference Result 81 states and 195 transitions. [2020-09-11 20:26:02,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 20:26:02,049 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 20:26:02,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:02,050 INFO L225 Difference]: With dead ends: 81 [2020-09-11 20:26:02,050 INFO L226 Difference]: Without dead ends: 75 [2020-09-11 20:26:02,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=795, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 20:26:02,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-11 20:26:02,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2020-09-11 20:26:02,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 20:26:02,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 160 transitions. [2020-09-11 20:26:02,055 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 160 transitions. Word has length 18 [2020-09-11 20:26:02,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:02,056 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 160 transitions. [2020-09-11 20:26:02,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 20:26:02,056 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 160 transitions. [2020-09-11 20:26:02,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 20:26:02,056 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:02,056 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:02,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:02,265 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:02,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:02,266 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 29 times [2020-09-11 20:26:02,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:02,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700139693] [2020-09-11 20:26:02,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:02,389 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:26:02,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700139693] [2020-09-11 20:26:02,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955782142] [2020-09-11 20:26:02,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:02,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 20:26:02,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:02,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 20:26:02,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:02,458 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:26:02,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:02,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 20:26:02,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1738388533] [2020-09-11 20:26:02,459 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:02,460 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:02,463 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-09-11 20:26:02,463 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:02,475 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:02,476 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:02,508 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:02,508 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:02,509 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7630#(and (<= ~j~0 16) (<= ~i~0 16))] [2020-09-11 20:26:02,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 20:26:02,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:02,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 20:26:02,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-11 20:26:02,510 INFO L87 Difference]: Start difference. First operand 63 states and 160 transitions. Second operand 15 states. [2020-09-11 20:26:03,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:03,093 INFO L93 Difference]: Finished difference Result 79 states and 195 transitions. [2020-09-11 20:26:03,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 20:26:03,098 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 20:26:03,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:03,099 INFO L225 Difference]: With dead ends: 79 [2020-09-11 20:26:03,099 INFO L226 Difference]: Without dead ends: 70 [2020-09-11 20:26:03,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=383, Invalid=807, Unknown=0, NotChecked=0, Total=1190 [2020-09-11 20:26:03,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-11 20:26:03,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-09-11 20:26:03,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 20:26:03,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-11 20:26:03,102 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-09-11 20:26:03,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:03,103 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-11 20:26:03,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 20:26:03,103 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-11 20:26:03,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 20:26:03,103 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:03,104 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:03,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:03,312 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:03,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:03,313 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 30 times [2020-09-11 20:26:03,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:03,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289925305] [2020-09-11 20:26:03,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:26:03,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289925305] [2020-09-11 20:26:03,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013642009] [2020-09-11 20:26:03,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:03,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-11 20:26:03,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:03,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 20:26:03,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:26:03,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-11 20:26:03,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2020-09-11 20:26:03,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [86904438] [2020-09-11 20:26:03,483 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:03,484 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:03,488 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 31 transitions. [2020-09-11 20:26:03,488 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:03,516 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-11 20:26:03,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 20:26:03,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:03,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 20:26:03,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-09-11 20:26:03,517 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 8 states. [2020-09-11 20:26:03,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:03,540 INFO L93 Difference]: Finished difference Result 151 states and 338 transitions. [2020-09-11 20:26:03,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 20:26:03,541 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-09-11 20:26:03,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:03,541 INFO L225 Difference]: With dead ends: 151 [2020-09-11 20:26:03,541 INFO L226 Difference]: Without dead ends: 50 [2020-09-11 20:26:03,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-09-11 20:26:03,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-11 20:26:03,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-09-11 20:26:03,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 20:26:03,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 100 transitions. [2020-09-11 20:26:03,547 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 100 transitions. Word has length 19 [2020-09-11 20:26:03,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:03,547 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 100 transitions. [2020-09-11 20:26:03,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 20:26:03,548 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 100 transitions. [2020-09-11 20:26:03,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 20:26:03,548 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:03,548 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:03,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-11 20:26:03,756 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:03,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:03,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 31 times [2020-09-11 20:26:03,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:03,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229085242] [2020-09-11 20:26:03,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:03,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:26:03,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229085242] [2020-09-11 20:26:03,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548185754] [2020-09-11 20:26:03,849 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:03,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:03,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 20:26:03,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:03,928 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:26:03,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-11 20:26:03,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2020-09-11 20:26:03,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1429777430] [2020-09-11 20:26:03,928 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:03,930 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:03,934 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 39 transitions. [2020-09-11 20:26:03,934 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:03,968 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-11 20:26:03,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 20:26:03,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:03,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 20:26:03,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-09-11 20:26:03,969 INFO L87 Difference]: Start difference. First operand 50 states and 100 transitions. Second operand 8 states. [2020-09-11 20:26:03,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:03,982 INFO L93 Difference]: Finished difference Result 86 states and 150 transitions. [2020-09-11 20:26:03,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 20:26:03,982 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-09-11 20:26:03,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:03,982 INFO L225 Difference]: With dead ends: 86 [2020-09-11 20:26:03,983 INFO L226 Difference]: Without dead ends: 0 [2020-09-11 20:26:03,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-09-11 20:26:03,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-11 20:26:03,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-11 20:26:03,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-11 20:26:03,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-11 20:26:03,984 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-09-11 20:26:03,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:03,984 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-11 20:26:03,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 20:26:03,984 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-11 20:26:03,985 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-11 20:26:04,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:04,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 08:26:04 BasicIcfg [2020-09-11 20:26:04,190 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-11 20:26:04,192 INFO L168 Benchmark]: Toolchain (without parser) took 28129.89 ms. Allocated memory was 139.5 MB in the beginning and 420.5 MB in the end (delta: 281.0 MB). Free memory was 101.1 MB in the beginning and 352.3 MB in the end (delta: -251.2 MB). Peak memory consumption was 29.8 MB. Max. memory is 7.1 GB. [2020-09-11 20:26:04,192 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-11 20:26:04,192 INFO L168 Benchmark]: CACSL2BoogieTranslator took 744.26 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 100.4 MB in the beginning and 161.6 MB in the end (delta: -61.2 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. [2020-09-11 20:26:04,193 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.62 ms. Allocated memory is still 201.9 MB. Free memory was 161.6 MB in the beginning and 159.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-11 20:26:04,193 INFO L168 Benchmark]: Boogie Preprocessor took 30.07 ms. Allocated memory is still 201.9 MB. Free memory was 159.6 MB in the beginning and 158.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-11 20:26:04,193 INFO L168 Benchmark]: RCFGBuilder took 457.80 ms. Allocated memory is still 201.9 MB. Free memory was 158.3 MB in the beginning and 137.8 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2020-09-11 20:26:04,194 INFO L168 Benchmark]: TraceAbstraction took 26827.93 ms. Allocated memory was 201.9 MB in the beginning and 420.5 MB in the end (delta: 218.6 MB). Free memory was 137.1 MB in the beginning and 352.3 MB in the end (delta: -215.2 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. [2020-09-11 20:26:04,196 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 744.26 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 100.4 MB in the beginning and 161.6 MB in the end (delta: -61.2 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 55.62 ms. Allocated memory is still 201.9 MB. Free memory was 161.6 MB in the beginning and 159.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.07 ms. Allocated memory is still 201.9 MB. Free memory was 159.6 MB in the beginning and 158.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 457.80 ms. Allocated memory is still 201.9 MB. Free memory was 158.3 MB in the beginning and 137.8 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 26827.93 ms. Allocated memory was 201.9 MB in the beginning and 420.5 MB in the end (delta: 218.6 MB). Free memory was 137.1 MB in the beginning and 352.3 MB in the end (delta: -215.2 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 26.6s, OverallIterations: 33, TraceHistogramMax: 6, AutomataDifference: 10.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 504 SDtfs, 1407 SDslu, 2052 SDs, 0 SdLazy, 2172 SolverSat, 1194 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1528 GetRequests, 783 SyntacticMatches, 57 SemanticMatches, 688 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3762 ImplicationChecksByTransitivity, 9.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=31, 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, 33 MinimizatonAttempts, 490 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 952 NumberOfCodeBlocks, 952 NumberOfCodeBlocksAsserted, 118 NumberOfCheckSat, 889 ConstructedInterpolants, 0 QuantifiedInterpolants, 54597 SizeOfPredicates, 202 NumberOfNonLiveVariables, 3040 ConjunctsInSsa, 328 ConjunctsInUnsatCore, 63 InterpolantComputations, 5 PerfectInterpolantSequences, 90/700 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...