/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-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-507b705 [2020-09-11 20:25:39,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-11 20:25:39,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-11 20:25:39,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-11 20:25:39,864 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-11 20:25:39,874 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-11 20:25:39,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-11 20:25:39,881 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-11 20:25:39,884 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-11 20:25:39,888 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-11 20:25:39,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-11 20:25:39,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-11 20:25:39,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-11 20:25:39,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-11 20:25:39,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-11 20:25:39,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-11 20:25:39,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-11 20:25:39,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-11 20:25:39,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-11 20:25:39,916 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-11 20:25:39,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-11 20:25:39,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-11 20:25:39,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-11 20:25:39,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-11 20:25:39,938 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-11 20:25:39,938 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-11 20:25:39,939 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-11 20:25:39,942 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-11 20:25:39,943 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-11 20:25:39,944 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-11 20:25:39,944 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-11 20:25:39,950 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-11 20:25:39,951 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-11 20:25:39,953 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-11 20:25:39,957 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-11 20:25:39,957 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-11 20:25:39,958 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-11 20:25:39,958 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-11 20:25:39,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-11 20:25:39,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-11 20:25:39,962 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-11 20:25:39,963 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 20:25:40,017 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-11 20:25:40,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-11 20:25:40,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-11 20:25:40,019 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-11 20:25:40,020 INFO L138 SettingsManager]: * Use SBE=true [2020-09-11 20:25:40,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-11 20:25:40,020 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-11 20:25:40,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-11 20:25:40,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-11 20:25:40,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-11 20:25:40,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-11 20:25:40,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-11 20:25:40,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-11 20:25:40,021 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-11 20:25:40,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-11 20:25:40,022 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-11 20:25:40,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-11 20:25:40,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-11 20:25:40,023 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-11 20:25:40,023 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-11 20:25:40,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-11 20:25:40,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 20:25:40,024 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-11 20:25:40,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-11 20:25:40,024 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-11 20:25:40,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-11 20:25:40,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-11 20:25:40,025 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-09-11 20:25:40,025 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-11 20:25:40,025 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-11 20:25:40,025 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-09-11 20:25:40,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-11 20:25:40,510 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-11 20:25:40,515 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-11 20:25:40,517 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-11 20:25:40,518 INFO L275 PluginConnector]: CDTParser initialized [2020-09-11 20:25:40,520 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2020-09-11 20:25:40,620 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/58d99e129/5a657a675d5f409086427e80fa5707b2/FLAG5e715f5d9 [2020-09-11 20:25:41,281 INFO L306 CDTParser]: Found 1 translation units. [2020-09-11 20:25:41,283 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-2.i [2020-09-11 20:25:41,299 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/58d99e129/5a657a675d5f409086427e80fa5707b2/FLAG5e715f5d9 [2020-09-11 20:25:41,582 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/58d99e129/5a657a675d5f409086427e80fa5707b2 [2020-09-11 20:25:41,596 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-11 20:25:41,603 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-11 20:25:41,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-11 20:25:41,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-11 20:25:41,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-11 20:25:41,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:25:41" (1/1) ... [2020-09-11 20:25:41,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a764e96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:41, skipping insertion in model container [2020-09-11 20:25:41,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:25:41" (1/1) ... [2020-09-11 20:25:41,623 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-11 20:25:41,696 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-11 20:25:42,198 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 20:25:42,217 INFO L203 MainTranslator]: Completed pre-run [2020-09-11 20:25:42,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 20:25:42,392 INFO L208 MainTranslator]: Completed translation [2020-09-11 20:25:42,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:42 WrapperNode [2020-09-11 20:25:42,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-11 20:25:42,394 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-11 20:25:42,395 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-11 20:25:42,395 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-11 20:25:42,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:42" (1/1) ... [2020-09-11 20:25:42,452 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:42" (1/1) ... [2020-09-11 20:25:42,489 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-11 20:25:42,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-11 20:25:42,490 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-11 20:25:42,490 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-11 20:25:42,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:42" (1/1) ... [2020-09-11 20:25:42,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:42" (1/1) ... [2020-09-11 20:25:42,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:42" (1/1) ... [2020-09-11 20:25:42,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:42" (1/1) ... [2020-09-11 20:25:42,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:42" (1/1) ... [2020-09-11 20:25:42,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:42" (1/1) ... [2020-09-11 20:25:42,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:42" (1/1) ... [2020-09-11 20:25:42,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-11 20:25:42,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-11 20:25:42,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-11 20:25:42,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-11 20:25:42,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:42" (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 20:25:42,601 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-11 20:25:42,601 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-11 20:25:42,601 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-11 20:25:42,601 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-11 20:25:42,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-11 20:25:42,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-11 20:25:42,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-11 20:25:42,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-11 20:25:42,603 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-11 20:25:42,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-11 20:25:42,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-11 20:25:42,606 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 20:25:43,012 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-11 20:25:43,012 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-11 20:25:43,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:25:43 BoogieIcfgContainer [2020-09-11 20:25:43,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-11 20:25:43,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-11 20:25:43,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-11 20:25:43,024 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-11 20:25:43,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 08:25:41" (1/3) ... [2020-09-11 20:25:43,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d61a2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:25:43, skipping insertion in model container [2020-09-11 20:25:43,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:25:42" (2/3) ... [2020-09-11 20:25:43,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d61a2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:25:43, skipping insertion in model container [2020-09-11 20:25:43,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:25:43" (3/3) ... [2020-09-11 20:25:43,029 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2020-09-11 20:25:43,040 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-11 20:25:43,041 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-11 20:25:43,050 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-11 20:25:43,051 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-11 20:25:43,081 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,082 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,082 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,082 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,083 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,083 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,083 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,084 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,084 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,084 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,085 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,085 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,085 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,085 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,086 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,086 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,086 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,087 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,087 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,087 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,088 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,088 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,088 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,089 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,089 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,089 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,089 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,090 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,095 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,095 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,095 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,096 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,096 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,096 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,107 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,107 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,108 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,108 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,108 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,108 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:25:43,135 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-11 20:25:43,160 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-11 20:25:43,160 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-11 20:25:43,161 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-11 20:25:43,161 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-11 20:25:43,161 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-11 20:25:43,161 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-11 20:25:43,161 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-11 20:25:43,162 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-11 20:25:43,179 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-11 20:25:43,182 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-11 20:25:43,224 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-11 20:25:43,225 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 20:25:43,232 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 20:25:43,235 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-11 20:25:43,255 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-11 20:25:43,255 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 20:25:43,256 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 20:25:43,258 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-11 20:25:43,260 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-11 20:25:44,322 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-11 20:25:44,566 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-11 20:25:44,567 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-11 20:25:44,572 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-11 20:25:44,587 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-11 20:25:44,590 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-11 20:25:44,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-11 20:25:44,600 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:44,601 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-11 20:25:44,602 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:44,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:44,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-11 20:25:44,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:44,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896955538] [2020-09-11 20:25:44,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:44,894 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 20:25:44,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896955538] [2020-09-11 20:25:44,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 20:25:44,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-11 20:25:44,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1622423058] [2020-09-11 20:25:44,899 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:44,903 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:44,939 INFO L274 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-09-11 20:25:44,939 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:44,942 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-11 20:25:44,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-11 20:25:44,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:44,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-11 20:25:44,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-11 20:25:44,967 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-11 20:25:45,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:45,052 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-11 20:25:45,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-11 20:25:45,054 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-11 20:25:45,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:45,068 INFO L225 Difference]: With dead ends: 75 [2020-09-11 20:25:45,068 INFO L226 Difference]: Without dead ends: 42 [2020-09-11 20:25:45,070 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 20:25:45,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-11 20:25:45,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-11 20:25:45,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 20:25:45,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-11 20:25:45,119 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-11 20:25:45,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:45,120 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-11 20:25:45,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-11 20:25:45,121 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-11 20:25:45,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 20:25:45,122 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:45,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:45,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-11 20:25:45,122 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:45,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:45,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-11 20:25:45,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:45,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837111765] [2020-09-11 20:25:45,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:45,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:45,243 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 20:25:45,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837111765] [2020-09-11 20:25:45,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 20:25:45,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 20:25:45,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [807702884] [2020-09-11 20:25:45,245 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:45,246 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:45,249 INFO L274 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-09-11 20:25:45,249 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:45,278 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-11 20:25:45,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 20:25:45,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:45,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 20:25:45,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 20:25:45,281 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-11 20:25:45,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:45,315 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-11 20:25:45,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-11 20:25:45,316 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-11 20:25:45,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:45,317 INFO L225 Difference]: With dead ends: 56 [2020-09-11 20:25:45,318 INFO L226 Difference]: Without dead ends: 50 [2020-09-11 20:25:45,319 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 20:25:45,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-11 20:25:45,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-11 20:25:45,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 20:25:45,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-11 20:25:45,327 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-11 20:25:45,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:45,329 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-11 20:25:45,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 20:25:45,329 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-11 20:25:45,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 20:25:45,330 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:45,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:45,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-11 20:25:45,331 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:45,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:45,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-11 20:25:45,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:45,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784045752] [2020-09-11 20:25:45,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:45,437 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 20:25:45,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784045752] [2020-09-11 20:25:45,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 20:25:45,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 20:25:45,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [364316643] [2020-09-11 20:25:45,439 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:45,440 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:45,447 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-09-11 20:25:45,448 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:45,510 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:45,511 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:45,530 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [466#(and (< ~i~0 16) (<= ~j~0 8))] [2020-09-11 20:25:45,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-11 20:25:45,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:45,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-11 20:25:45,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-11 20:25:45,531 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 7 states. [2020-09-11 20:25:45,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:45,668 INFO L93 Difference]: Finished difference Result 62 states and 148 transitions. [2020-09-11 20:25:45,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 20:25:45,669 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-09-11 20:25:45,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:45,670 INFO L225 Difference]: With dead ends: 62 [2020-09-11 20:25:45,671 INFO L226 Difference]: Without dead ends: 44 [2020-09-11 20:25:45,671 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 20:25:45,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-11 20:25:45,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-09-11 20:25:45,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-11 20:25:45,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-11 20:25:45,678 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 10 [2020-09-11 20:25:45,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:45,678 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-11 20:25:45,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-11 20:25:45,679 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-11 20:25:45,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 20:25:45,679 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:45,680 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:45,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-11 20:25:45,680 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:45,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:45,681 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 2 times [2020-09-11 20:25:45,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:45,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123364675] [2020-09-11 20:25:45,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:45,778 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 20:25:45,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123364675] [2020-09-11 20:25:45,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552580380] [2020-09-11 20:25:45,780 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 20:25:45,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:25:45,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:45,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 20:25:45,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:45,867 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 20:25:45,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:45,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-11 20:25:45,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1040004623] [2020-09-11 20:25:45,869 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:45,870 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:45,873 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 31 transitions. [2020-09-11 20:25:45,873 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:45,888 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:45,889 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:45,908 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:45,908 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:45,921 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:45,921 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:45,935 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:45,936 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:45,959 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:45,959 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:45,970 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:45,970 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:45,985 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:45,986 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:45,995 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:45,995 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:46,005 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [644#(and (< ~i~0 16) (<= ~j~0 4))] [2020-09-11 20:25:46,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 20:25:46,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:46,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 20:25:46,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-11 20:25:46,007 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 8 states. [2020-09-11 20:25:46,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:46,147 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-09-11 20:25:46,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 20:25:46,148 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 20:25:46,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:46,149 INFO L225 Difference]: With dead ends: 56 [2020-09-11 20:25:46,149 INFO L226 Difference]: Without dead ends: 50 [2020-09-11 20:25:46,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-11 20:25:46,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-11 20:25:46,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-11 20:25:46,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 20:25:46,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 104 transitions. [2020-09-11 20:25:46,157 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 104 transitions. Word has length 11 [2020-09-11 20:25:46,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:46,158 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 104 transitions. [2020-09-11 20:25:46,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 20:25:46,158 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 104 transitions. [2020-09-11 20:25:46,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 20:25:46,175 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:46,175 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:46,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:46,389 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:46,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:46,390 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 3 times [2020-09-11 20:25:46,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:46,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863622117] [2020-09-11 20:25:46,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:46,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:46,505 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 20:25:46,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863622117] [2020-09-11 20:25:46,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277509874] [2020-09-11 20:25:46,508 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 20:25:46,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 20:25:46,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:46,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 20:25:46,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:46,596 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 20:25:46,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:46,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-11 20:25:46,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2045091013] [2020-09-11 20:25:46,597 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:46,598 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:46,601 INFO L274 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-09-11 20:25:46,601 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:46,618 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:46,618 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:46,651 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:46,652 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:46,653 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [832#(and (< ~i~0 16) (<= ~j~0 6))] [2020-09-11 20:25:46,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 20:25:46,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:46,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 20:25:46,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-11 20:25:46,655 INFO L87 Difference]: Start difference. First operand 42 states and 104 transitions. Second operand 8 states. [2020-09-11 20:25:46,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:46,883 INFO L93 Difference]: Finished difference Result 66 states and 159 transitions. [2020-09-11 20:25:46,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 20:25:46,884 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 20:25:46,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:46,885 INFO L225 Difference]: With dead ends: 66 [2020-09-11 20:25:46,886 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 20:25:46,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-09-11 20:25:46,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 20:25:46,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-09-11 20:25:46,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-11 20:25:46,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 91 transitions. [2020-09-11 20:25:46,892 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 91 transitions. Word has length 11 [2020-09-11 20:25:46,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:46,893 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 91 transitions. [2020-09-11 20:25:46,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 20:25:46,893 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 91 transitions. [2020-09-11 20:25:46,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 20:25:46,894 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:46,894 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:47,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:47,096 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:47,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:47,097 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 4 times [2020-09-11 20:25:47,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:47,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317186250] [2020-09-11 20:25:47,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:47,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:47,197 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 20:25:47,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317186250] [2020-09-11 20:25:47,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051550125] [2020-09-11 20:25:47,199 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 20:25:47,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:25:47,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:47,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 20:25:47,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:47,303 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 20:25:47,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:47,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-11 20:25:47,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [926221261] [2020-09-11 20:25:47,306 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:47,308 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:47,315 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-09-11 20:25:47,316 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:47,325 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:47,325 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:47,401 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:47,404 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:47,438 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1034#(and (< ~i~0 16) (<= ~j~0 8))] [2020-09-11 20:25:47,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 20:25:47,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:47,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 20:25:47,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-11 20:25:47,439 INFO L87 Difference]: Start difference. First operand 38 states and 91 transitions. Second operand 9 states. [2020-09-11 20:25:47,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:47,659 INFO L93 Difference]: Finished difference Result 64 states and 149 transitions. [2020-09-11 20:25:47,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 20:25:47,661 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 20:25:47,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:47,662 INFO L225 Difference]: With dead ends: 64 [2020-09-11 20:25:47,662 INFO L226 Difference]: Without dead ends: 58 [2020-09-11 20:25:47,663 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 20:25:47,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-11 20:25:47,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-11 20:25:47,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-11 20:25:47,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 112 transitions. [2020-09-11 20:25:47,678 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 112 transitions. Word has length 12 [2020-09-11 20:25:47,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:47,679 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 112 transitions. [2020-09-11 20:25:47,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 20:25:47,680 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 112 transitions. [2020-09-11 20:25:47,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 20:25:47,681 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:47,681 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:47,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:47,882 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:47,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:47,883 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 5 times [2020-09-11 20:25:47,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:47,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778878311] [2020-09-11 20:25:47,899 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 20:25:48,002 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 20:25:48,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778878311] [2020-09-11 20:25:48,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634003298] [2020-09-11 20:25:48,003 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 20:25:48,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:25:48,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:48,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 20:25:48,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:48,083 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 20:25:48,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:48,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-11 20:25:48,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [306827901] [2020-09-11 20:25:48,084 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:48,085 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:48,089 INFO L274 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-09-11 20:25:48,089 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:48,117 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:48,118 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:48,159 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:48,159 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:48,161 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1244#(and (< ~i~0 16) (<= ~j~0 10))] [2020-09-11 20:25:48,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 20:25:48,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:48,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 20:25:48,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-11 20:25:48,163 INFO L87 Difference]: Start difference. First operand 45 states and 112 transitions. Second operand 9 states. [2020-09-11 20:25:48,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:48,426 INFO L93 Difference]: Finished difference Result 63 states and 155 transitions. [2020-09-11 20:25:48,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 20:25:48,427 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 20:25:48,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:48,428 INFO L225 Difference]: With dead ends: 63 [2020-09-11 20:25:48,428 INFO L226 Difference]: Without dead ends: 51 [2020-09-11 20:25:48,429 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 20:25:48,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-11 20:25:48,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2020-09-11 20:25:48,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-11 20:25:48,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-11 20:25:48,435 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 12 [2020-09-11 20:25:48,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:48,435 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-11 20:25:48,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 20:25:48,435 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-11 20:25:48,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 20:25:48,436 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:48,436 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:48,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:48,649 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:48,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:48,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 6 times [2020-09-11 20:25:48,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:48,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528554796] [2020-09-11 20:25:48,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:48,769 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 20:25:48,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528554796] [2020-09-11 20:25:48,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432316228] [2020-09-11 20:25:48,770 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 20:25:48,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 20:25:48,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:48,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 20:25:48,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:48,853 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 20:25:48,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:48,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 20:25:48,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [562140579] [2020-09-11 20:25:48,854 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:48,856 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:48,859 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-09-11 20:25:48,859 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:48,872 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:48,872 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:48,895 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:48,896 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:48,908 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:48,908 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:48,921 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:48,921 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:48,944 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:48,945 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:48,949 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:48,949 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:48,963 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:48,964 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:48,973 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:48,974 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:48,985 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1447#(and (< ~i~0 16) (<= ~j~0 4))] [2020-09-11 20:25:48,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 20:25:48,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:48,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 20:25:48,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 20:25:48,987 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 10 states. [2020-09-11 20:25:49,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:49,188 INFO L93 Difference]: Finished difference Result 60 states and 140 transitions. [2020-09-11 20:25:49,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 20:25:49,188 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 20:25:49,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:49,190 INFO L225 Difference]: With dead ends: 60 [2020-09-11 20:25:49,190 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 20:25:49,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-11 20:25:49,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 20:25:49,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-11 20:25:49,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 20:25:49,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-11 20:25:49,196 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 13 [2020-09-11 20:25:49,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:49,197 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-11 20:25:49,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 20:25:49,197 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-11 20:25:49,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 20:25:49,198 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:49,198 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:49,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:49,411 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:49,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:49,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 7 times [2020-09-11 20:25:49,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:49,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734778354] [2020-09-11 20:25:49,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:49,558 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 20:25:49,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734778354] [2020-09-11 20:25:49,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455194734] [2020-09-11 20:25:49,559 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 20:25:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:49,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 20:25:49,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:49,642 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 20:25:49,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:49,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 20:25:49,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1241084703] [2020-09-11 20:25:49,643 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:49,645 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:49,647 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-09-11 20:25:49,648 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:49,649 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:49,649 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:49,685 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:49,686 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:49,698 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1659#(and (< ~i~0 16) (<= ~j~0 6))] [2020-09-11 20:25:49,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 20:25:49,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:49,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 20:25:49,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-11 20:25:49,700 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 10 states. [2020-09-11 20:25:50,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:50,023 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-11 20:25:50,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 20:25:50,024 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 20:25:50,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:50,024 INFO L225 Difference]: With dead ends: 74 [2020-09-11 20:25:50,025 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 20:25:50,025 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 20:25:50,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 20:25:50,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-11 20:25:50,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-11 20:25:50,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 120 transitions. [2020-09-11 20:25:50,030 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 120 transitions. Word has length 13 [2020-09-11 20:25:50,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:50,031 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 120 transitions. [2020-09-11 20:25:50,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 20:25:50,031 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 120 transitions. [2020-09-11 20:25:50,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 20:25:50,032 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:50,032 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:50,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:50,243 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:50,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:50,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 8 times [2020-09-11 20:25:50,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:50,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603911874] [2020-09-11 20:25:50,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:50,344 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 20:25:50,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603911874] [2020-09-11 20:25:50,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832997809] [2020-09-11 20:25:50,345 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 20:25:50,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:25:50,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:50,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 20:25:50,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:50,419 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 20:25:50,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:50,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 20:25:50,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [459952863] [2020-09-11 20:25:50,420 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:50,421 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:50,424 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-09-11 20:25:50,424 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:50,425 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:50,425 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:50,454 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:50,454 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:50,466 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1897#(and (< ~i~0 16) (<= ~j~0 8))] [2020-09-11 20:25:50,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 20:25:50,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:50,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 20:25:50,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-11 20:25:50,468 INFO L87 Difference]: Start difference. First operand 48 states and 120 transitions. Second operand 10 states. [2020-09-11 20:25:50,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:50,796 INFO L93 Difference]: Finished difference Result 74 states and 179 transitions. [2020-09-11 20:25:50,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 20:25:50,798 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 20:25:50,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:50,799 INFO L225 Difference]: With dead ends: 74 [2020-09-11 20:25:50,799 INFO L226 Difference]: Without dead ends: 62 [2020-09-11 20:25:50,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2020-09-11 20:25:50,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-11 20:25:50,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2020-09-11 20:25:50,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 20:25:50,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-11 20:25:50,804 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 13 [2020-09-11 20:25:50,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:50,804 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-11 20:25:50,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 20:25:50,804 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-11 20:25:50,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 20:25:50,805 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:50,805 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:51,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-11 20:25:51,018 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:51,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:51,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 9 times [2020-09-11 20:25:51,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:51,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590917912] [2020-09-11 20:25:51,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:51,177 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 20:25:51,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590917912] [2020-09-11 20:25:51,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229146475] [2020-09-11 20:25:51,178 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 20:25:51,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 20:25:51,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:51,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 20:25:51,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:51,295 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 20:25:51,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:51,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 20:25:51,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [880221605] [2020-09-11 20:25:51,303 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:51,304 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:51,307 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2020-09-11 20:25:51,307 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:51,309 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:51,310 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:51,358 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:51,359 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:51,378 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2131#(and (< ~i~0 16) (<= ~j~0 8))] [2020-09-11 20:25:51,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 20:25:51,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:51,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 20:25:51,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-11 20:25:51,380 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 11 states. [2020-09-11 20:25:51,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:51,627 INFO L93 Difference]: Finished difference Result 70 states and 162 transitions. [2020-09-11 20:25:51,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 20:25:51,628 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 20:25:51,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:51,628 INFO L225 Difference]: With dead ends: 70 [2020-09-11 20:25:51,629 INFO L226 Difference]: Without dead ends: 64 [2020-09-11 20:25:51,629 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 20:25:51,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-11 20:25:51,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2020-09-11 20:25:51,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-11 20:25:51,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 120 transitions. [2020-09-11 20:25:51,633 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 120 transitions. Word has length 14 [2020-09-11 20:25:51,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:51,634 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 120 transitions. [2020-09-11 20:25:51,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 20:25:51,634 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 120 transitions. [2020-09-11 20:25:51,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 20:25:51,635 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:51,635 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:51,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-09-11 20:25:51,841 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:51,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:51,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 10 times [2020-09-11 20:25:51,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:51,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891094436] [2020-09-11 20:25:51,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:51,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:51,965 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 20:25:51,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891094436] [2020-09-11 20:25:51,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625516619] [2020-09-11 20:25:51,966 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 20:25:52,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:25:52,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:52,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 20:25:52,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:52,038 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 20:25:52,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:52,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 20:25:52,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1448733391] [2020-09-11 20:25:52,039 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:52,041 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:52,044 INFO L274 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-09-11 20:25:52,044 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:52,045 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:52,045 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:52,084 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:52,085 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:52,108 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2367#(and (< ~i~0 16) (<= ~j~0 10))] [2020-09-11 20:25:52,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 20:25:52,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:52,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 20:25:52,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-11 20:25:52,109 INFO L87 Difference]: Start difference. First operand 49 states and 120 transitions. Second operand 11 states. [2020-09-11 20:25:52,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:52,384 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-11 20:25:52,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 20:25:52,384 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 20:25:52,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:52,385 INFO L225 Difference]: With dead ends: 69 [2020-09-11 20:25:52,385 INFO L226 Difference]: Without dead ends: 63 [2020-09-11 20:25:52,386 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 20:25:52,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-11 20:25:52,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-09-11 20:25:52,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-11 20:25:52,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 128 transitions. [2020-09-11 20:25:52,395 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 128 transitions. Word has length 14 [2020-09-11 20:25:52,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:52,396 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 128 transitions. [2020-09-11 20:25:52,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 20:25:52,396 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 128 transitions. [2020-09-11 20:25:52,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 20:25:52,400 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:52,400 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:52,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:52,601 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:52,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:52,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 11 times [2020-09-11 20:25:52,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:52,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018717585] [2020-09-11 20:25:52,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:52,699 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 20:25:52,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018717585] [2020-09-11 20:25:52,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010392670] [2020-09-11 20:25:52,700 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 20:25:52,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 20:25:52,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:52,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 20:25:52,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:52,776 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 20:25:52,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:52,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 20:25:52,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1528731753] [2020-09-11 20:25:52,778 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:52,779 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:52,782 INFO L274 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-09-11 20:25:52,782 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:52,783 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:52,784 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:52,842 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:52,843 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:52,866 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2610#(and (< ~i~0 16) (<= ~j~0 12))] [2020-09-11 20:25:52,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 20:25:52,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:52,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 20:25:52,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-11 20:25:52,868 INFO L87 Difference]: Start difference. First operand 51 states and 128 transitions. Second operand 11 states. [2020-09-11 20:25:53,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:53,224 INFO L93 Difference]: Finished difference Result 69 states and 171 transitions. [2020-09-11 20:25:53,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 20:25:53,224 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 20:25:53,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:53,225 INFO L225 Difference]: With dead ends: 69 [2020-09-11 20:25:53,225 INFO L226 Difference]: Without dead ends: 57 [2020-09-11 20:25:53,226 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 20:25:53,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-11 20:25:53,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2020-09-11 20:25:53,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 20:25:53,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-11 20:25:53,230 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 14 [2020-09-11 20:25:53,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:53,230 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-11 20:25:53,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 20:25:53,230 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-11 20:25:53,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 20:25:53,231 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:53,231 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:53,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:53,441 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:53,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:53,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 12 times [2020-09-11 20:25:53,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:53,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172833909] [2020-09-11 20:25:53,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:53,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:53,562 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 20:25:53,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172833909] [2020-09-11 20:25:53,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858945424] [2020-09-11 20:25:53,564 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 20:25:53,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 20:25:53,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:53,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 20:25:53,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:53,650 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 20:25:53,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:53,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 20:25:53,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1109374086] [2020-09-11 20:25:53,651 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:53,653 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:53,656 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-09-11 20:25:53,656 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:53,679 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:53,680 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:53,702 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:53,703 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:53,718 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:53,718 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:53,723 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:53,723 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:53,742 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:53,743 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:53,753 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:53,754 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:53,767 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:53,768 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:53,775 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:53,775 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:53,784 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2843#(and (< ~i~0 16) (<= ~j~0 4))] [2020-09-11 20:25:53,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 20:25:53,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:53,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 20:25:53,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-11 20:25:53,785 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 12 states. [2020-09-11 20:25:54,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:54,007 INFO L93 Difference]: Finished difference Result 66 states and 154 transitions. [2020-09-11 20:25:54,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 20:25:54,008 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 20:25:54,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:54,009 INFO L225 Difference]: With dead ends: 66 [2020-09-11 20:25:54,009 INFO L226 Difference]: Without dead ends: 60 [2020-09-11 20:25:54,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-11 20:25:54,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-11 20:25:54,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-11 20:25:54,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 20:25:54,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-11 20:25:54,013 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 15 [2020-09-11 20:25:54,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:54,013 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-11 20:25:54,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 20:25:54,014 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-11 20:25:54,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 20:25:54,014 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:54,014 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:54,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-11 20:25:54,222 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:54,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:54,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 13 times [2020-09-11 20:25:54,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:54,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997242197] [2020-09-11 20:25:54,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:54,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:54,339 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 20:25:54,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997242197] [2020-09-11 20:25:54,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60739549] [2020-09-11 20:25:54,340 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 20:25:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:54,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 20:25:54,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:54,415 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 20:25:54,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:54,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 20:25:54,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [12904890] [2020-09-11 20:25:54,416 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:54,417 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:54,420 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-11 20:25:54,420 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:54,421 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:54,421 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:54,456 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:54,457 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:54,468 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3081#(and (< ~i~0 16) (<= ~j~0 6))] [2020-09-11 20:25:54,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 20:25:54,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:54,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 20:25:54,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-11 20:25:54,470 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 12 states. [2020-09-11 20:25:54,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:54,810 INFO L93 Difference]: Finished difference Result 82 states and 188 transitions. [2020-09-11 20:25:54,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 20:25:54,811 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 20:25:54,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:54,812 INFO L225 Difference]: With dead ends: 82 [2020-09-11 20:25:54,812 INFO L226 Difference]: Without dead ends: 76 [2020-09-11 20:25:54,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2020-09-11 20:25:54,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-11 20:25:54,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-11 20:25:54,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 20:25:54,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 128 transitions. [2020-09-11 20:25:54,820 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 128 transitions. Word has length 15 [2020-09-11 20:25:54,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:54,820 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 128 transitions. [2020-09-11 20:25:54,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 20:25:54,823 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 128 transitions. [2020-09-11 20:25:54,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 20:25:54,824 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:54,824 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:55,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-11 20:25:55,025 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:55,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:55,026 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 14 times [2020-09-11 20:25:55,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:55,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212323629] [2020-09-11 20:25:55,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:55,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:55,134 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 20:25:55,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212323629] [2020-09-11 20:25:55,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008217967] [2020-09-11 20:25:55,135 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 20:25:55,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:25:55,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:55,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 20:25:55,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:55,214 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 20:25:55,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:55,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 20:25:55,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1166539524] [2020-09-11 20:25:55,216 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:55,217 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:55,221 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-11 20:25:55,221 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:55,235 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:55,235 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:55,269 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:55,269 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:55,270 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3347#(and (< ~i~0 16) (<= ~j~0 8))] [2020-09-11 20:25:55,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 20:25:55,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:55,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 20:25:55,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-09-11 20:25:55,272 INFO L87 Difference]: Start difference. First operand 52 states and 128 transitions. Second operand 12 states. [2020-09-11 20:25:55,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:55,635 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-11 20:25:55,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 20:25:55,636 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 20:25:55,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:55,637 INFO L225 Difference]: With dead ends: 81 [2020-09-11 20:25:55,637 INFO L226 Difference]: Without dead ends: 75 [2020-09-11 20:25:55,638 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 20:25:55,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-11 20:25:55,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-09-11 20:25:55,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 20:25:55,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 136 transitions. [2020-09-11 20:25:55,641 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 136 transitions. Word has length 15 [2020-09-11 20:25:55,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:55,642 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 136 transitions. [2020-09-11 20:25:55,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 20:25:55,642 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 136 transitions. [2020-09-11 20:25:55,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 20:25:55,643 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:55,643 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:55,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-11 20:25:55,848 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:55,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:55,849 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 15 times [2020-09-11 20:25:55,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:55,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55583596] [2020-09-11 20:25:55,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:55,953 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 20:25:55,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55583596] [2020-09-11 20:25:55,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22234004] [2020-09-11 20:25:55,954 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 20:25:56,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 20:25:56,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:56,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 20:25:56,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:56,066 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 20:25:56,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:56,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 20:25:56,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1300595873] [2020-09-11 20:25:56,068 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:56,070 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:56,073 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-11 20:25:56,074 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:56,075 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:56,075 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:56,108 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:56,109 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:56,122 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3620#(and (< ~i~0 16) (<= ~j~0 10))] [2020-09-11 20:25:56,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 20:25:56,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:56,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 20:25:56,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-09-11 20:25:56,123 INFO L87 Difference]: Start difference. First operand 54 states and 136 transitions. Second operand 12 states. [2020-09-11 20:25:56,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:56,622 INFO L93 Difference]: Finished difference Result 82 states and 199 transitions. [2020-09-11 20:25:56,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 20:25:56,623 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 20:25:56,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:56,624 INFO L225 Difference]: With dead ends: 82 [2020-09-11 20:25:56,624 INFO L226 Difference]: Without dead ends: 70 [2020-09-11 20:25:56,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-09-11 20:25:56,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-11 20:25:56,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2020-09-11 20:25:56,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 20:25:56,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-11 20:25:56,628 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 15 [2020-09-11 20:25:56,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:56,629 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-11 20:25:56,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 20:25:56,629 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-11 20:25:56,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 20:25:56,630 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:56,630 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:56,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:56,841 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:56,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:56,842 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 16 times [2020-09-11 20:25:56,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:56,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177069003] [2020-09-11 20:25:56,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:56,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:56,975 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 20:25:56,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177069003] [2020-09-11 20:25:56,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885874870] [2020-09-11 20:25:56,976 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 20:25:57,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:25:57,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:57,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 20:25:57,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:57,052 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 20:25:57,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:57,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 20:25:57,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [760662563] [2020-09-11 20:25:57,053 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:57,054 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:57,057 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 32 transitions. [2020-09-11 20:25:57,057 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:57,083 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:57,083 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:57,119 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:57,119 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:57,121 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3886#(and (< ~i~0 16) (<= ~j~0 8))] [2020-09-11 20:25:57,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 20:25:57,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:57,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 20:25:57,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-09-11 20:25:57,122 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 13 states. [2020-09-11 20:25:57,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:57,408 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-11 20:25:57,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 20:25:57,409 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 20:25:57,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:57,410 INFO L225 Difference]: With dead ends: 78 [2020-09-11 20:25:57,410 INFO L226 Difference]: Without dead ends: 72 [2020-09-11 20:25:57,411 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 20:25:57,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-11 20:25:57,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-09-11 20:25:57,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-11 20:25:57,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 130 transitions. [2020-09-11 20:25:57,414 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 130 transitions. Word has length 16 [2020-09-11 20:25:57,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:57,414 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 130 transitions. [2020-09-11 20:25:57,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 20:25:57,414 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 130 transitions. [2020-09-11 20:25:57,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 20:25:57,415 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:57,415 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:57,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-11 20:25:57,624 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:57,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:57,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 17 times [2020-09-11 20:25:57,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:57,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630458110] [2020-09-11 20:25:57,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:57,780 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 20:25:57,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630458110] [2020-09-11 20:25:57,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91206366] [2020-09-11 20:25:57,781 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 20:25:57,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 20:25:57,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:57,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 20:25:57,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:57,877 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 20:25:57,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:57,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 20:25:57,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1977257207] [2020-09-11 20:25:57,878 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:57,880 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:57,884 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-11 20:25:57,884 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:57,886 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:57,886 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:57,930 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:57,930 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:57,950 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4150#(and (< ~i~0 16) (<= ~j~0 10))] [2020-09-11 20:25:57,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 20:25:57,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:57,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 20:25:57,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-11 20:25:57,951 INFO L87 Difference]: Start difference. First operand 53 states and 130 transitions. Second operand 13 states. [2020-09-11 20:25:58,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:58,301 INFO L93 Difference]: Finished difference Result 75 states and 176 transitions. [2020-09-11 20:25:58,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 20:25:58,302 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 20:25:58,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:58,303 INFO L225 Difference]: With dead ends: 75 [2020-09-11 20:25:58,303 INFO L226 Difference]: Without dead ends: 69 [2020-09-11 20:25:58,304 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 20:25:58,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-11 20:25:58,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-11 20:25:58,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-11 20:25:58,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-09-11 20:25:58,306 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 16 [2020-09-11 20:25:58,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:58,307 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-09-11 20:25:58,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 20:25:58,307 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-09-11 20:25:58,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 20:25:58,308 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:58,308 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:58,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:58,519 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:58,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:58,519 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 18 times [2020-09-11 20:25:58,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:58,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075182505] [2020-09-11 20:25:58,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:58,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:58,631 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 20:25:58,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075182505] [2020-09-11 20:25:58,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198804916] [2020-09-11 20:25:58,632 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 20:25:58,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 20:25:58,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:25:58,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 20:25:58,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:58,769 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 20:25:58,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:58,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 20:25:58,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1314760325] [2020-09-11 20:25:58,771 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:58,773 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:58,778 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-11 20:25:58,778 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:58,779 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:58,780 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:58,824 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:58,825 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:58,842 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4419#(and (< ~i~0 16) (<= ~j~0 12))] [2020-09-11 20:25:58,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 20:25:58,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:58,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 20:25:58,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-11 20:25:58,843 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 13 states. [2020-09-11 20:25:59,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:25:59,336 INFO L93 Difference]: Finished difference Result 75 states and 179 transitions. [2020-09-11 20:25:59,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 20:25:59,336 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 20:25:59,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:25:59,337 INFO L225 Difference]: With dead ends: 75 [2020-09-11 20:25:59,337 INFO L226 Difference]: Without dead ends: 69 [2020-09-11 20:25:59,338 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 20:25:59,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-11 20:25:59,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2020-09-11 20:25:59,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 20:25:59,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 144 transitions. [2020-09-11 20:25:59,344 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 144 transitions. Word has length 16 [2020-09-11 20:25:59,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:25:59,345 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 144 transitions. [2020-09-11 20:25:59,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 20:25:59,345 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 144 transitions. [2020-09-11 20:25:59,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 20:25:59,345 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:25:59,346 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:25:59,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:25:59,547 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:25:59,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:25:59,548 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 19 times [2020-09-11 20:25:59,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:25:59,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801348580] [2020-09-11 20:25:59,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:25:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:59,657 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 20:25:59,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801348580] [2020-09-11 20:25:59,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261758757] [2020-09-11 20:25:59,658 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 20:25:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:25:59,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 20:25:59,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:25:59,739 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 20:25:59,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:25:59,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 20:25:59,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1980074877] [2020-09-11 20:25:59,740 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:25:59,741 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:25:59,743 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-11 20:25:59,744 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:25:59,772 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:59,772 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:59,806 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:25:59,806 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:25:59,808 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4696#(and (< ~i~0 16) (<= ~j~0 14))] [2020-09-11 20:25:59,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 20:25:59,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:25:59,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 20:25:59,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-09-11 20:25:59,809 INFO L87 Difference]: Start difference. First operand 57 states and 144 transitions. Second operand 13 states. [2020-09-11 20:26:00,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:00,278 INFO L93 Difference]: Finished difference Result 75 states and 187 transitions. [2020-09-11 20:26:00,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 20:26:00,279 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 20:26:00,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:00,279 INFO L225 Difference]: With dead ends: 75 [2020-09-11 20:26:00,279 INFO L226 Difference]: Without dead ends: 63 [2020-09-11 20:26:00,280 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 20:26:00,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-11 20:26:00,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-11 20:26:00,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 20:26:00,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-11 20:26:00,283 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 16 [2020-09-11 20:26:00,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:00,283 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-11 20:26:00,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 20:26:00,284 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-11 20:26:00,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 20:26:00,284 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:00,284 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:00,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-11 20:26:00,495 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:00,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:00,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 20 times [2020-09-11 20:26:00,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:00,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843244535] [2020-09-11 20:26:00,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:00,673 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 20:26:00,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843244535] [2020-09-11 20:26:00,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749857433] [2020-09-11 20:26:00,674 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 20:26:00,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:26:00,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:00,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 20:26:00,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:00,758 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 20:26:00,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:00,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 20:26:00,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [831203859] [2020-09-11 20:26:00,760 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:00,762 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:00,767 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 37 transitions. [2020-09-11 20:26:00,767 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:00,777 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:00,777 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:00,798 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:00,798 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:00,814 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:00,815 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:00,822 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:00,823 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:00,853 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:00,854 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:00,868 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:00,868 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:00,908 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:00,908 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:00,913 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:00,913 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:00,927 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4959#(and (< ~i~0 16) (<= ~j~0 4))] [2020-09-11 20:26:00,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 20:26:00,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:00,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 20:26:00,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-11 20:26:00,928 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 14 states. [2020-09-11 20:26:01,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:01,261 INFO L93 Difference]: Finished difference Result 72 states and 168 transitions. [2020-09-11 20:26:01,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 20:26:01,261 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 20:26:01,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:01,262 INFO L225 Difference]: With dead ends: 72 [2020-09-11 20:26:01,263 INFO L226 Difference]: Without dead ends: 66 [2020-09-11 20:26:01,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2020-09-11 20:26:01,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-11 20:26:01,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-11 20:26:01,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 20:26:01,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-11 20:26:01,267 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 17 [2020-09-11 20:26:01,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:01,267 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-11 20:26:01,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 20:26:01,267 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-11 20:26:01,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 20:26:01,268 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:01,268 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:01,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:01,476 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:01,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:01,477 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 21 times [2020-09-11 20:26:01,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:01,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715735977] [2020-09-11 20:26:01,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:01,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:01,632 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 20:26:01,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715735977] [2020-09-11 20:26:01,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699811073] [2020-09-11 20:26:01,633 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 20:26:01,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 20:26:01,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:01,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 20:26:01,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:01,723 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 20:26:01,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:01,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 20:26:01,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [796919044] [2020-09-11 20:26:01,724 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:01,726 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:01,728 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-11 20:26:01,729 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:01,742 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:01,743 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:01,774 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:01,775 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:01,775 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5223#(and (< ~i~0 16) (<= ~j~0 6))] [2020-09-11 20:26:01,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 20:26:01,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:01,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 20:26:01,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-09-11 20:26:01,777 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 14 states. [2020-09-11 20:26:02,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:02,156 INFO L93 Difference]: Finished difference Result 92 states and 210 transitions. [2020-09-11 20:26:02,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 20:26:02,157 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 20:26:02,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:02,157 INFO L225 Difference]: With dead ends: 92 [2020-09-11 20:26:02,158 INFO L226 Difference]: Without dead ends: 86 [2020-09-11 20:26:02,158 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 20:26:02,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-11 20:26:02,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2020-09-11 20:26:02,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 20:26:02,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 138 transitions. [2020-09-11 20:26:02,161 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 138 transitions. Word has length 17 [2020-09-11 20:26:02,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:02,162 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 138 transitions. [2020-09-11 20:26:02,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 20:26:02,162 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 138 transitions. [2020-09-11 20:26:02,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 20:26:02,163 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:02,163 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:02,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-11 20:26:02,371 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:02,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:02,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 22 times [2020-09-11 20:26:02,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:02,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372979169] [2020-09-11 20:26:02,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:02,508 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 20:26:02,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372979169] [2020-09-11 20:26:02,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776531955] [2020-09-11 20:26:02,509 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 20:26:02,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:26:02,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:02,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 20:26:02,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:02,585 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 20:26:02,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:02,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 20:26:02,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [266878759] [2020-09-11 20:26:02,586 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:02,587 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:02,590 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-11 20:26:02,590 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:02,591 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:02,591 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:02,631 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:02,631 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:02,645 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5519#(and (< ~i~0 16) (<= ~j~0 8))] [2020-09-11 20:26:02,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 20:26:02,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:02,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 20:26:02,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-11 20:26:02,646 INFO L87 Difference]: Start difference. First operand 56 states and 138 transitions. Second operand 14 states. [2020-09-11 20:26:03,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:03,158 INFO L93 Difference]: Finished difference Result 89 states and 206 transitions. [2020-09-11 20:26:03,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 20:26:03,159 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 20:26:03,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:03,160 INFO L225 Difference]: With dead ends: 89 [2020-09-11 20:26:03,160 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 20:26:03,161 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 20:26:03,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 20:26:03,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2020-09-11 20:26:03,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 20:26:03,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 144 transitions. [2020-09-11 20:26:03,165 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 144 transitions. Word has length 17 [2020-09-11 20:26:03,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:03,165 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 144 transitions. [2020-09-11 20:26:03,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 20:26:03,165 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 144 transitions. [2020-09-11 20:26:03,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 20:26:03,166 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:03,166 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:03,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-11 20:26:03,375 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:03,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:03,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 23 times [2020-09-11 20:26:03,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:03,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721230298] [2020-09-11 20:26:03,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:03,493 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 20:26:03,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721230298] [2020-09-11 20:26:03,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857591585] [2020-09-11 20:26:03,493 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 20:26:03,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 20:26:03,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:03,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 20:26:03,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:03,566 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 20:26:03,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:03,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 20:26:03,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [698064577] [2020-09-11 20:26:03,567 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:03,568 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:03,571 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-11 20:26:03,571 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:03,581 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:03,581 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:03,616 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:03,616 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:03,617 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5820#(and (< ~i~0 16) (<= ~j~0 10))] [2020-09-11 20:26:03,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 20:26:03,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:03,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 20:26:03,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-09-11 20:26:03,618 INFO L87 Difference]: Start difference. First operand 58 states and 144 transitions. Second operand 14 states. [2020-09-11 20:26:04,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:04,169 INFO L93 Difference]: Finished difference Result 89 states and 209 transitions. [2020-09-11 20:26:04,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 20:26:04,169 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 20:26:04,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:04,170 INFO L225 Difference]: With dead ends: 89 [2020-09-11 20:26:04,170 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 20:26:04,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=315, Invalid=741, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 20:26:04,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 20:26:04,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-11 20:26:04,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-11 20:26:04,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 152 transitions. [2020-09-11 20:26:04,173 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 152 transitions. Word has length 17 [2020-09-11 20:26:04,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:04,173 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 152 transitions. [2020-09-11 20:26:04,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 20:26:04,174 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 152 transitions. [2020-09-11 20:26:04,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 20:26:04,174 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:04,174 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:04,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:26:04,376 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:04,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:04,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 24 times [2020-09-11 20:26:04,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:04,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493665507] [2020-09-11 20:26:04,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:04,490 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 20:26:04,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493665507] [2020-09-11 20:26:04,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55108969] [2020-09-11 20:26:04,491 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 20:26:04,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 20:26:04,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:26:04,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 20:26:04,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:26:04,580 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 20:26:04,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:26:04,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 20:26:04,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1137389719] [2020-09-11 20:26:04,581 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:04,583 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:04,585 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-11 20:26:04,586 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:04,600 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:04,600 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:04,631 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-11 20:26:04,632 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-11 20:26:04,633 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6129#(and (< ~i~0 16) (<= ~j~0 12))] [2020-09-11 20:26:04,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 20:26:04,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:04,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 20:26:04,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-09-11 20:26:04,634 INFO L87 Difference]: Start difference. First operand 60 states and 152 transitions. Second operand 14 states. [2020-09-11 20:26:05,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:05,254 INFO L93 Difference]: Finished difference Result 90 states and 219 transitions. [2020-09-11 20:26:05,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 20:26:05,254 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 20:26:05,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:05,256 INFO L225 Difference]: With dead ends: 90 [2020-09-11 20:26:05,256 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 20:26:05,257 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 20:26:05,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 20:26:05,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 50. [2020-09-11 20:26:05,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 20:26:05,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-11 20:26:05,259 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 17 [2020-09-11 20:26:05,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:05,260 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-11 20:26:05,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 20:26:05,260 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-11 20:26:05,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 20:26:05,260 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:05,260 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:05,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-11 20:26:05,461 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:26:05,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:05,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 25 times [2020-09-11 20:26:05,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:05,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947959107] [2020-09-11 20:26:05,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-11 20:26:05,478 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-11 20:26:05,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-11 20:26:05,493 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-11 20:26:05,519 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-11 20:26:05,519 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-11 20:26:05,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-11 20:26:05,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 08:26:05 BasicIcfg [2020-09-11 20:26:05,578 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-11 20:26:05,580 INFO L168 Benchmark]: Toolchain (without parser) took 23982.21 ms. Allocated memory was 139.5 MB in the beginning and 404.2 MB in the end (delta: 264.8 MB). Free memory was 100.6 MB in the beginning and 105.5 MB in the end (delta: -4.9 MB). Peak memory consumption was 259.9 MB. Max. memory is 7.1 GB. [2020-09-11 20:26:05,581 INFO L168 Benchmark]: CDTParser took 0.25 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: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-11 20:26:05,581 INFO L168 Benchmark]: CACSL2BoogieTranslator took 790.13 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 99.9 MB in the beginning and 163.4 MB in the end (delta: -63.5 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. [2020-09-11 20:26:05,582 INFO L168 Benchmark]: Boogie Procedure Inliner took 95.27 ms. Allocated memory is still 203.4 MB. Free memory was 163.4 MB in the beginning and 161.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-09-11 20:26:05,582 INFO L168 Benchmark]: Boogie Preprocessor took 34.03 ms. Allocated memory is still 203.4 MB. Free memory was 161.3 MB in the beginning and 160.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-11 20:26:05,582 INFO L168 Benchmark]: RCFGBuilder took 493.63 ms. Allocated memory is still 203.4 MB. Free memory was 160.0 MB in the beginning and 139.5 MB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. [2020-09-11 20:26:05,583 INFO L168 Benchmark]: TraceAbstraction took 22558.87 ms. Allocated memory was 203.4 MB in the beginning and 404.2 MB in the end (delta: 200.8 MB). Free memory was 138.9 MB in the beginning and 105.5 MB in the end (delta: 33.4 MB). Peak memory consumption was 234.2 MB. Max. memory is 7.1 GB. [2020-09-11 20:26:05,585 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 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: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 790.13 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 99.9 MB in the beginning and 163.4 MB in the end (delta: -63.5 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 95.27 ms. Allocated memory is still 203.4 MB. Free memory was 163.4 MB in the beginning and 161.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.03 ms. Allocated memory is still 203.4 MB. Free memory was 161.3 MB in the beginning and 160.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 493.63 ms. Allocated memory is still 203.4 MB. Free memory was 160.0 MB in the beginning and 139.5 MB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 22558.87 ms. Allocated memory was 203.4 MB in the beginning and 404.2 MB in the end (delta: 200.8 MB). Free memory was 138.9 MB in the beginning and 105.5 MB in the end (delta: 33.4 MB). Peak memory consumption was 234.2 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 - CounterExampleResult [Line: 703]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L675] 0 int i = 3, j = 6; [L693] 0 pthread_t id1, id2; [L694] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L677] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L695] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L685] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L697] 0 int condI = i >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L700] 0 int condJ = j >= (2*5 +6); [L702] COND TRUE 0 condI || condJ [L703] 0 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 22.3s, OverallIterations: 27, TraceHistogramMax: 5, AutomataDifference: 8.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 374 SDtfs, 1096 SDslu, 1600 SDs, 0 SdLazy, 1735 SolverSat, 881 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1149 GetRequests, 574 SyntacticMatches, 50 SemanticMatches, 525 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2715 ImplicationChecksByTransitivity, 7.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=25, 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, 26 MinimizatonAttempts, 417 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 714 NumberOfCodeBlocks, 714 NumberOfCodeBlocksAsserted, 90 NumberOfCheckSat, 647 ConstructedInterpolants, 0 QuantifiedInterpolants, 38679 SizeOfPredicates, 152 NumberOfNonLiveVariables, 2232 ConjunctsInSsa, 244 ConjunctsInUnsatCore, 49 InterpolantComputations, 3 PerfectInterpolantSequences, 0/400 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...