/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/fib_safe-7.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 17:20:32,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 17:20:32,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 17:20:32,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-15 17:20:32,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-15 17:20:32,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-15 17:20:32,591 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-15 17:20:32,592 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-15 17:20:32,594 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-15 17:20:32,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-15 17:20:32,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-15 17:20:32,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-15 17:20:32,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-15 17:20:32,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-15 17:20:32,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-15 17:20:32,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-15 17:20:32,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-15 17:20:32,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-15 17:20:32,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-15 17:20:32,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-15 17:20:32,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-15 17:20:32,604 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-15 17:20:32,604 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-15 17:20:32,605 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-15 17:20:32,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-15 17:20:32,606 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-15 17:20:32,607 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-15 17:20:32,607 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-15 17:20:32,607 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-15 17:20:32,608 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-15 17:20:32,608 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-15 17:20:32,608 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-15 17:20:32,609 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-15 17:20:32,609 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-15 17:20:32,610 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-15 17:20:32,610 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-15 17:20:32,610 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-15 17:20:32,610 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-15 17:20:32,610 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 17:20:32,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 17:20:32,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 17:20:32,615 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2022-03-15 17:20:32,640 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 17:20:32,640 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 17:20:32,640 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 17:20:32,641 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 17:20:32,641 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 17:20:32,641 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 17:20:32,641 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 17:20:32,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 17:20:32,641 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 17:20:32,641 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 17:20:32,641 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 17:20:32,641 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 17:20:32,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 17:20:32,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 17:20:32,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 17:20:32,642 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 17:20:32,642 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 17:20:32,642 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 17:20:32,642 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 17:20:32,642 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 17:20:32,642 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 17:20:32,642 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 17:20:32,642 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 17:20:32,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 17:20:32,643 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 17:20:32,643 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-15 17:20:32,643 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 17:20:32,643 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 17:20:32,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 17:20:32,643 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2022-03-15 17:20:32,643 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2022-03-15 17:20:32,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 17:20:32,643 INFO L138 SettingsManager]: * Interpolant automaton=MCR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 17:20:32,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 17:20:32,842 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 17:20:32,845 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 17:20:32,845 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-15 17:20:32,846 INFO L275 PluginConnector]: CDTParser initialized [2022-03-15 17:20:32,847 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_safe-7.i [2022-03-15 17:20:32,891 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03691ebb4/7ee1f1485094475595cf0d13a1efea3e/FLAG32a708926 [2022-03-15 17:20:33,257 INFO L306 CDTParser]: Found 1 translation units. [2022-03-15 17:20:33,257 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-7.i [2022-03-15 17:20:33,266 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03691ebb4/7ee1f1485094475595cf0d13a1efea3e/FLAG32a708926 [2022-03-15 17:20:33,650 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03691ebb4/7ee1f1485094475595cf0d13a1efea3e [2022-03-15 17:20:33,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 17:20:33,653 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-15 17:20:33,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-15 17:20:33,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-15 17:20:33,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-15 17:20:33,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.03 05:20:33" (1/1) ... [2022-03-15 17:20:33,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d67e417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 05:20:33, skipping insertion in model container [2022-03-15 17:20:33,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.03 05:20:33" (1/1) ... [2022-03-15 17:20:33,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-15 17:20:33,696 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-15 17:20:33,905 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-7.i[30813,30826] [2022-03-15 17:20:33,907 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-15 17:20:33,912 INFO L203 MainTranslator]: Completed pre-run [2022-03-15 17:20:33,946 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-7.i[30813,30826] [2022-03-15 17:20:33,947 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-15 17:20:33,977 INFO L208 MainTranslator]: Completed translation [2022-03-15 17:20:33,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 05:20:33 WrapperNode [2022-03-15 17:20:33,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-15 17:20:33,979 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 17:20:33,979 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 17:20:33,979 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 17:20:33,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 05:20:33" (1/1) ... [2022-03-15 17:20:34,003 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 05:20:33" (1/1) ... [2022-03-15 17:20:34,019 INFO L137 Inliner]: procedures = 164, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2022-03-15 17:20:34,020 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 17:20:34,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 17:20:34,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 17:20:34,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 17:20:34,025 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 05:20:33" (1/1) ... [2022-03-15 17:20:34,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 05:20:33" (1/1) ... [2022-03-15 17:20:34,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 05:20:33" (1/1) ... [2022-03-15 17:20:34,029 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 05:20:33" (1/1) ... [2022-03-15 17:20:34,039 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 05:20:33" (1/1) ... [2022-03-15 17:20:34,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 05:20:33" (1/1) ... [2022-03-15 17:20:34,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 05:20:33" (1/1) ... [2022-03-15 17:20:34,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 17:20:34,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 17:20:34,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 17:20:34,045 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 17:20:34,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 05:20:33" (1/1) ... [2022-03-15 17:20:34,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 17:20:34,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:20:34,069 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-15 17:20:34,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-15 17:20:34,093 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-03-15 17:20:34,094 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-03-15 17:20:34,094 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-03-15 17:20:34,094 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-03-15 17:20:34,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-15 17:20:34,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-03-15 17:20:34,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-15 17:20:34,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-15 17:20:34,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-15 17:20:34,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-15 17:20:34,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-03-15 17:20:34,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 17:20:34,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 17:20:34,100 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 17:20:34,230 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 17:20:34,231 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 17:20:34,401 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 17:20:34,406 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 17:20:34,406 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-15 17:20:34,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 05:20:34 BoogieIcfgContainer [2022-03-15 17:20:34,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 17:20:34,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 17:20:34,409 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 17:20:34,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 17:20:34,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.03 05:20:33" (1/3) ... [2022-03-15 17:20:34,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb76b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 05:20:34, skipping insertion in model container [2022-03-15 17:20:34,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 05:20:33" (2/3) ... [2022-03-15 17:20:34,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb76b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 05:20:34, skipping insertion in model container [2022-03-15 17:20:34,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 05:20:34" (3/3) ... [2022-03-15 17:20:34,415 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_safe-7.i [2022-03-15 17:20:34,419 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 17:20:34,419 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-15 17:20:34,419 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 17:20:34,419 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 17:20:34,462 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,462 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,462 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,462 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,464 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,464 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,464 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,464 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,465 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,465 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,465 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,465 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,466 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,467 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,467 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,467 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,468 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,468 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,469 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,469 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,469 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,469 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,469 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,469 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,470 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,470 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,470 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,470 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,470 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,471 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,471 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,471 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,472 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,472 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,472 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,472 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,476 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,477 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,477 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,477 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,477 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,479 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,479 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,479 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,479 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,480 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 17:20:34,480 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-03-15 17:20:34,522 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 17:20:34,529 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=MCR, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=true, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 17:20:34,529 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 17:20:34,540 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 17:20:34,546 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 96 transitions, 202 flow [2022-03-15 17:20:34,548 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 96 transitions, 202 flow [2022-03-15 17:20:34,549 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 96 places, 96 transitions, 202 flow [2022-03-15 17:20:34,589 INFO L129 PetriNetUnfolder]: 7/94 cut-off events. [2022-03-15 17:20:34,590 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-03-15 17:20:34,594 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 94 events. 7/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 73 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2022-03-15 17:20:34,597 INFO L116 LiptonReduction]: Number of co-enabled transitions 1870 [2022-03-15 17:20:37,039 INFO L131 LiptonReduction]: Checked pairs total: 1462 [2022-03-15 17:20:37,039 INFO L133 LiptonReduction]: Total number of compositions: 92 [2022-03-15 17:20:37,045 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2022-03-15 17:20:37,061 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:37,062 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:37,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-03-15 17:20:37,069 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:20:37,069 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-03-15 17:20:37,070 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:20:37,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:20:37,074 INFO L85 PathProgramCache]: Analyzing trace with hash -2083717598, now seen corresponding path program 1 times [2022-03-15 17:20:37,089 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:20:37,089 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885862202] [2022-03-15 17:20:37,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:20:37,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:20:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:20:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:37,211 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:20:37,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885862202] [2022-03-15 17:20:37,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885862202] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 17:20:37,211 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 17:20:37,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 17:20:37,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1054165818] [2022-03-15 17:20:37,213 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 17:20:37,214 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 17:20:37,221 INFO L252 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2022-03-15 17:20:37,221 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 17:20:37,223 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 17:20:37,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 17:20:37,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:20:37,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 17:20:37,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 17:20:37,238 INFO L87 Difference]: Start difference. First operand has 35 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:37,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:20:37,269 INFO L93 Difference]: Finished difference Result 44 states and 122 transitions. [2022-03-15 17:20:37,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 17:20:37,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-03-15 17:20:37,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:20:37,280 INFO L225 Difference]: With dead ends: 44 [2022-03-15 17:20:37,280 INFO L226 Difference]: Without dead ends: 44 [2022-03-15 17:20:37,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 17:20:37,283 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 17:20:37,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 17:20:37,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-15 17:20:37,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-15 17:20:37,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.8372093023255816) internal successors, (122), 43 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:37,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 122 transitions. [2022-03-15 17:20:37,308 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 122 transitions. Word has length 6 [2022-03-15 17:20:37,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:20:37,308 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 122 transitions. [2022-03-15 17:20:37,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:37,309 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 122 transitions. [2022-03-15 17:20:37,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-03-15 17:20:37,309 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:20:37,309 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:20:37,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 17:20:37,309 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:20:37,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:20:37,310 INFO L85 PathProgramCache]: Analyzing trace with hash -170735922, now seen corresponding path program 1 times [2022-03-15 17:20:37,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:20:37,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179184415] [2022-03-15 17:20:37,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:20:37,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:20:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:20:37,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:37,349 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:20:37,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179184415] [2022-03-15 17:20:37,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179184415] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:20:37,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676740941] [2022-03-15 17:20:37,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:20:37,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:20:37,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:20:37,357 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:20:37,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 17:20:37,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:20:37,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-15 17:20:37,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:20:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:37,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:20:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:37,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676740941] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:20:37,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:20:37,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-03-15 17:20:37,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [969573179] [2022-03-15 17:20:37,496 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 17:20:37,497 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 17:20:37,498 INFO L252 McrAutomatonBuilder]: Finished intersection with 8 states and 7 transitions. [2022-03-15 17:20:37,498 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 17:20:37,498 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 17:20:37,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 17:20:37,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:20:37,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 17:20:37,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-03-15 17:20:37,499 INFO L87 Difference]: Start difference. First operand 44 states and 122 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:37,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:20:37,521 INFO L93 Difference]: Finished difference Result 53 states and 149 transitions. [2022-03-15 17:20:37,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 17:20:37,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-03-15 17:20:37,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:20:37,536 INFO L225 Difference]: With dead ends: 53 [2022-03-15 17:20:37,536 INFO L226 Difference]: Without dead ends: 53 [2022-03-15 17:20:37,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-03-15 17:20:37,537 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 24 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 17:20:37,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 0 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 17:20:37,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-15 17:20:37,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-03-15 17:20:37,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.8653846153846154) internal successors, (149), 52 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:37,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 149 transitions. [2022-03-15 17:20:37,543 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 149 transitions. Word has length 7 [2022-03-15 17:20:37,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:20:37,543 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 149 transitions. [2022-03-15 17:20:37,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:37,543 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 149 transitions. [2022-03-15 17:20:37,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-03-15 17:20:37,544 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:20:37,544 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-03-15 17:20:37,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-15 17:20:37,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:20:37,756 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:20:37,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:20:37,756 INFO L85 PathProgramCache]: Analyzing trace with hash -997846110, now seen corresponding path program 2 times [2022-03-15 17:20:37,757 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:20:37,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083709887] [2022-03-15 17:20:37,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:20:37,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:20:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:20:37,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:37,807 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:20:37,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083709887] [2022-03-15 17:20:37,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083709887] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:20:37,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413924295] [2022-03-15 17:20:37,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:20:37,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:20:37,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:20:37,809 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:20:37,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 17:20:37,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:20:37,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:20:37,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 17:20:37,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:20:37,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:37,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:20:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:37,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413924295] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:20:37,909 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:20:37,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-03-15 17:20:37,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1500019117] [2022-03-15 17:20:37,910 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 17:20:37,910 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 17:20:37,911 INFO L252 McrAutomatonBuilder]: Finished intersection with 9 states and 8 transitions. [2022-03-15 17:20:37,911 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 17:20:37,912 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 17:20:37,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 17:20:37,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:20:37,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 17:20:37,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-03-15 17:20:37,912 INFO L87 Difference]: Start difference. First operand 53 states and 149 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:37,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:20:37,962 INFO L93 Difference]: Finished difference Result 62 states and 176 transitions. [2022-03-15 17:20:37,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 17:20:37,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-03-15 17:20:37,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:20:37,963 INFO L225 Difference]: With dead ends: 62 [2022-03-15 17:20:37,963 INFO L226 Difference]: Without dead ends: 62 [2022-03-15 17:20:37,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-03-15 17:20:37,964 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 30 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 17:20:37,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 0 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 17:20:37,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-15 17:20:37,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-03-15 17:20:37,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.8852459016393444) internal successors, (176), 61 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:37,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 176 transitions. [2022-03-15 17:20:37,974 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 176 transitions. Word has length 8 [2022-03-15 17:20:37,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:20:37,974 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 176 transitions. [2022-03-15 17:20:37,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:37,974 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 176 transitions. [2022-03-15 17:20:37,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-15 17:20:37,975 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:20:37,975 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-03-15 17:20:37,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-15 17:20:38,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-15 17:20:38,178 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:20:38,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:20:38,178 INFO L85 PathProgramCache]: Analyzing trace with hash -868458162, now seen corresponding path program 3 times [2022-03-15 17:20:38,179 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:20:38,179 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576214580] [2022-03-15 17:20:38,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:20:38,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:20:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:20:38,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:38,233 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:20:38,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576214580] [2022-03-15 17:20:38,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576214580] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:20:38,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150939766] [2022-03-15 17:20:38,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:20:38,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:20:38,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:20:38,234 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:20:38,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 17:20:38,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 17:20:38,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:20:38,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 17:20:38,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:20:38,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:38,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:20:38,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:38,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150939766] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:20:38,352 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:20:38,352 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-03-15 17:20:38,352 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1224015936] [2022-03-15 17:20:38,352 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 17:20:38,353 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 17:20:38,354 INFO L252 McrAutomatonBuilder]: Finished intersection with 10 states and 9 transitions. [2022-03-15 17:20:38,354 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 17:20:38,355 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 17:20:38,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 17:20:38,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:20:38,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 17:20:38,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2022-03-15 17:20:38,355 INFO L87 Difference]: Start difference. First operand 62 states and 176 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:38,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:20:38,428 INFO L93 Difference]: Finished difference Result 71 states and 203 transitions. [2022-03-15 17:20:38,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 17:20:38,439 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-03-15 17:20:38,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:20:38,440 INFO L225 Difference]: With dead ends: 71 [2022-03-15 17:20:38,440 INFO L226 Difference]: Without dead ends: 71 [2022-03-15 17:20:38,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2022-03-15 17:20:38,441 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 57 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 17:20:38,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 0 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 17:20:38,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-15 17:20:38,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-15 17:20:38,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.9) internal successors, (203), 70 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:38,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 203 transitions. [2022-03-15 17:20:38,447 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 203 transitions. Word has length 9 [2022-03-15 17:20:38,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:20:38,447 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 203 transitions. [2022-03-15 17:20:38,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:38,448 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 203 transitions. [2022-03-15 17:20:38,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-15 17:20:38,448 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:20:38,448 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-03-15 17:20:38,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 17:20:38,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:20:38,649 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:20:38,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:20:38,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1152399070, now seen corresponding path program 4 times [2022-03-15 17:20:38,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:20:38,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213014329] [2022-03-15 17:20:38,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:20:38,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:20:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:20:38,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:38,699 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:20:38,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213014329] [2022-03-15 17:20:38,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213014329] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:20:38,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659356892] [2022-03-15 17:20:38,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:20:38,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:20:38,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:20:38,701 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:20:38,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 17:20:38,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:20:38,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:20:38,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 17:20:38,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:20:38,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:38,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:20:38,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:38,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659356892] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:20:38,835 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:20:38,835 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-03-15 17:20:38,835 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [615469429] [2022-03-15 17:20:38,835 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 17:20:38,836 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 17:20:38,837 INFO L252 McrAutomatonBuilder]: Finished intersection with 11 states and 10 transitions. [2022-03-15 17:20:38,837 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 17:20:38,837 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 17:20:38,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 17:20:38,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:20:38,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 17:20:38,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-03-15 17:20:38,838 INFO L87 Difference]: Start difference. First operand 71 states and 203 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:38,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:20:38,883 INFO L93 Difference]: Finished difference Result 80 states and 230 transitions. [2022-03-15 17:20:38,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 17:20:38,883 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-03-15 17:20:38,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:20:38,884 INFO L225 Difference]: With dead ends: 80 [2022-03-15 17:20:38,884 INFO L226 Difference]: Without dead ends: 80 [2022-03-15 17:20:38,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-03-15 17:20:38,885 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 90 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 17:20:38,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 0 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 17:20:38,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-15 17:20:38,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-03-15 17:20:38,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.911392405063291) internal successors, (230), 79 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:38,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 230 transitions. [2022-03-15 17:20:38,890 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 230 transitions. Word has length 10 [2022-03-15 17:20:38,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:20:38,891 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 230 transitions. [2022-03-15 17:20:38,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:38,891 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 230 transitions. [2022-03-15 17:20:38,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-15 17:20:38,891 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:20:38,891 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2022-03-15 17:20:38,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 17:20:39,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:20:39,108 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:20:39,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:20:39,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1364632626, now seen corresponding path program 5 times [2022-03-15 17:20:39,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:20:39,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956361423] [2022-03-15 17:20:39,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:20:39,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:20:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:20:39,166 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:39,166 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:20:39,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956361423] [2022-03-15 17:20:39,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956361423] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:20:39,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527614373] [2022-03-15 17:20:39,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:20:39,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:20:39,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:20:39,167 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:20:39,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 17:20:39,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 17:20:39,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:20:39,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 17:20:39,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:20:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:39,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:20:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:39,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527614373] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:20:39,332 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:20:39,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 17:20:39,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [685497783] [2022-03-15 17:20:39,332 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 17:20:39,333 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 17:20:39,334 INFO L252 McrAutomatonBuilder]: Finished intersection with 12 states and 11 transitions. [2022-03-15 17:20:39,334 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 17:20:39,335 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 17:20:39,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 17:20:39,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:20:39,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 17:20:39,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2022-03-15 17:20:39,336 INFO L87 Difference]: Start difference. First operand 80 states and 230 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:39,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:20:39,386 INFO L93 Difference]: Finished difference Result 89 states and 257 transitions. [2022-03-15 17:20:39,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 17:20:39,387 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-15 17:20:39,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:20:39,388 INFO L225 Difference]: With dead ends: 89 [2022-03-15 17:20:39,388 INFO L226 Difference]: Without dead ends: 89 [2022-03-15 17:20:39,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2022-03-15 17:20:39,391 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 69 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 17:20:39,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 0 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 17:20:39,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-15 17:20:39,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-03-15 17:20:39,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.9204545454545454) internal successors, (257), 88 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:39,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 257 transitions. [2022-03-15 17:20:39,406 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 257 transitions. Word has length 11 [2022-03-15 17:20:39,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:20:39,406 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 257 transitions. [2022-03-15 17:20:39,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:39,406 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 257 transitions. [2022-03-15 17:20:39,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 17:20:39,407 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:20:39,407 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2022-03-15 17:20:39,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 17:20:39,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:20:39,608 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:20:39,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:20:39,608 INFO L85 PathProgramCache]: Analyzing trace with hash 646061730, now seen corresponding path program 6 times [2022-03-15 17:20:39,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:20:39,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749619057] [2022-03-15 17:20:39,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:20:39,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:20:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:20:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:39,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:20:39,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749619057] [2022-03-15 17:20:39,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749619057] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:20:39,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574787841] [2022-03-15 17:20:39,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:20:39,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:20:39,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:20:39,657 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:20:39,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 17:20:39,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 17:20:39,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:20:39,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 17:20:39,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:20:39,742 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:39,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:20:39,807 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:39,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574787841] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:20:39,807 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:20:39,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-15 17:20:39,808 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2117771960] [2022-03-15 17:20:39,808 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 17:20:39,809 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 17:20:39,811 INFO L252 McrAutomatonBuilder]: Finished intersection with 13 states and 12 transitions. [2022-03-15 17:20:39,811 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 17:20:39,811 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 17:20:39,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 17:20:39,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:20:39,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 17:20:39,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-03-15 17:20:39,812 INFO L87 Difference]: Start difference. First operand 89 states and 257 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:39,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:20:39,865 INFO L93 Difference]: Finished difference Result 98 states and 284 transitions. [2022-03-15 17:20:39,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 17:20:39,865 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-15 17:20:39,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:20:39,866 INFO L225 Difference]: With dead ends: 98 [2022-03-15 17:20:39,866 INFO L226 Difference]: Without dead ends: 98 [2022-03-15 17:20:39,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-03-15 17:20:39,867 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 81 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 17:20:39,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 0 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 17:20:39,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-15 17:20:39,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-03-15 17:20:39,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.9278350515463916) internal successors, (284), 97 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:39,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 284 transitions. [2022-03-15 17:20:39,871 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 284 transitions. Word has length 12 [2022-03-15 17:20:39,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:20:39,871 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 284 transitions. [2022-03-15 17:20:39,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:39,872 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 284 transitions. [2022-03-15 17:20:39,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 17:20:39,875 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:20:39,876 INFO L514 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2022-03-15 17:20:39,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 17:20:40,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:20:40,094 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:20:40,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:20:40,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1446922674, now seen corresponding path program 7 times [2022-03-15 17:20:40,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:20:40,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233053005] [2022-03-15 17:20:40,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:20:40,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:20:40,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:20:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:40,154 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:20:40,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233053005] [2022-03-15 17:20:40,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233053005] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:20:40,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414438639] [2022-03-15 17:20:40,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:20:40,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:20:40,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:20:40,156 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:20:40,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 17:20:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:20:40,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:20:40,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:20:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:40,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:20:40,311 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:40,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414438639] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:20:40,311 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:20:40,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 17:20:40,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [424336913] [2022-03-15 17:20:40,312 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 17:20:40,312 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 17:20:40,313 INFO L252 McrAutomatonBuilder]: Finished intersection with 14 states and 13 transitions. [2022-03-15 17:20:40,314 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 17:20:40,314 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 17:20:40,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 17:20:40,314 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:20:40,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 17:20:40,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-03-15 17:20:40,315 INFO L87 Difference]: Start difference. First operand 98 states and 284 transitions. Second operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:40,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:20:40,375 INFO L93 Difference]: Finished difference Result 107 states and 311 transitions. [2022-03-15 17:20:40,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 17:20:40,375 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 17:20:40,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:20:40,376 INFO L225 Difference]: With dead ends: 107 [2022-03-15 17:20:40,376 INFO L226 Difference]: Without dead ends: 107 [2022-03-15 17:20:40,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-03-15 17:20:40,378 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 90 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 17:20:40,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 0 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 17:20:40,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-15 17:20:40,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-03-15 17:20:40,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.9339622641509435) internal successors, (311), 106 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:40,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 311 transitions. [2022-03-15 17:20:40,393 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 311 transitions. Word has length 13 [2022-03-15 17:20:40,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:20:40,393 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 311 transitions. [2022-03-15 17:20:40,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:40,393 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 311 transitions. [2022-03-15 17:20:40,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 17:20:40,394 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:20:40,394 INFO L514 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1] [2022-03-15 17:20:40,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 17:20:40,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:20:40,595 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:20:40,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:20:40,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1904929758, now seen corresponding path program 8 times [2022-03-15 17:20:40,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:20:40,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982837619] [2022-03-15 17:20:40,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:20:40,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:20:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:20:40,650 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:40,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:20:40,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982837619] [2022-03-15 17:20:40,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982837619] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:20:40,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470273331] [2022-03-15 17:20:40,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:20:40,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:20:40,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:20:40,652 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:20:40,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 17:20:40,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:20:40,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:20:40,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 17:20:40,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:20:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:40,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:20:40,840 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:40,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470273331] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:20:40,840 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:20:40,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-03-15 17:20:40,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [750221157] [2022-03-15 17:20:40,840 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 17:20:40,841 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 17:20:40,842 INFO L252 McrAutomatonBuilder]: Finished intersection with 15 states and 14 transitions. [2022-03-15 17:20:40,842 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 17:20:40,842 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 17:20:40,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 17:20:40,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:20:40,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 17:20:40,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-03-15 17:20:40,843 INFO L87 Difference]: Start difference. First operand 107 states and 311 transitions. Second operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:40,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:20:40,900 INFO L93 Difference]: Finished difference Result 116 states and 338 transitions. [2022-03-15 17:20:40,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 17:20:40,901 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 17:20:40,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:20:40,901 INFO L225 Difference]: With dead ends: 116 [2022-03-15 17:20:40,901 INFO L226 Difference]: Without dead ends: 116 [2022-03-15 17:20:40,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-03-15 17:20:40,902 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 108 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 17:20:40,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 0 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 17:20:40,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-15 17:20:40,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-03-15 17:20:40,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.9391304347826086) internal successors, (338), 115 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:40,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 338 transitions. [2022-03-15 17:20:40,906 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 338 transitions. Word has length 14 [2022-03-15 17:20:40,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:20:40,906 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 338 transitions. [2022-03-15 17:20:40,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:40,907 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 338 transitions. [2022-03-15 17:20:40,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 17:20:40,907 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:20:40,907 INFO L514 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1] [2022-03-15 17:20:40,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 17:20:41,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-15 17:20:41,124 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:20:41,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:20:41,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1076719822, now seen corresponding path program 9 times [2022-03-15 17:20:41,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:20:41,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503367421] [2022-03-15 17:20:41,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:20:41,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:20:41,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:20:41,191 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:41,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:20:41,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503367421] [2022-03-15 17:20:41,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503367421] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:20:41,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43492582] [2022-03-15 17:20:41,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:20:41,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:20:41,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:20:41,196 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:20:41,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 17:20:41,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 17:20:41,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:20:41,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 17:20:41,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:20:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:41,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:20:41,393 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:41,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43492582] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:20:41,394 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:20:41,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-15 17:20:41,394 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2121778386] [2022-03-15 17:20:41,394 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 17:20:41,395 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 17:20:41,396 INFO L252 McrAutomatonBuilder]: Finished intersection with 16 states and 15 transitions. [2022-03-15 17:20:41,397 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 17:20:41,397 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 17:20:41,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 17:20:41,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:20:41,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 17:20:41,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-03-15 17:20:41,398 INFO L87 Difference]: Start difference. First operand 116 states and 338 transitions. Second operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:41,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:20:41,463 INFO L93 Difference]: Finished difference Result 125 states and 365 transitions. [2022-03-15 17:20:41,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 17:20:41,463 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 17:20:41,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:20:41,464 INFO L225 Difference]: With dead ends: 125 [2022-03-15 17:20:41,464 INFO L226 Difference]: Without dead ends: 125 [2022-03-15 17:20:41,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-03-15 17:20:41,464 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 132 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 17:20:41,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 0 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 17:20:41,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-15 17:20:41,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-03-15 17:20:41,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.943548387096774) internal successors, (365), 124 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:41,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 365 transitions. [2022-03-15 17:20:41,467 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 365 transitions. Word has length 15 [2022-03-15 17:20:41,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:20:41,468 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 365 transitions. [2022-03-15 17:20:41,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:41,468 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 365 transitions. [2022-03-15 17:20:41,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 17:20:41,468 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:20:41,468 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-03-15 17:20:41,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 17:20:41,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-15 17:20:41,687 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:20:41,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:20:41,687 INFO L85 PathProgramCache]: Analyzing trace with hash -981423710, now seen corresponding path program 10 times [2022-03-15 17:20:41,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:20:41,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848891330] [2022-03-15 17:20:41,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:20:41,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:20:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:20:41,779 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:41,779 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:20:41,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848891330] [2022-03-15 17:20:41,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848891330] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:20:41,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015565615] [2022-03-15 17:20:41,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:20:41,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:20:41,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:20:41,781 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:20:41,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 17:20:41,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:20:41,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:20:41,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 17:20:41,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:20:41,872 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:41,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:20:41,948 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:41,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015565615] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:20:41,949 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:20:41,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 18 [2022-03-15 17:20:41,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1993788728] [2022-03-15 17:20:41,949 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 17:20:41,950 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 17:20:41,951 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 16 transitions. [2022-03-15 17:20:41,951 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 17:20:41,952 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 17:20:41,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 17:20:41,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:20:41,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 17:20:41,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-03-15 17:20:41,952 INFO L87 Difference]: Start difference. First operand 125 states and 365 transitions. Second operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:42,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:20:42,016 INFO L93 Difference]: Finished difference Result 134 states and 392 transitions. [2022-03-15 17:20:42,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 17:20:42,016 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 17:20:42,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:20:42,017 INFO L225 Difference]: With dead ends: 134 [2022-03-15 17:20:42,017 INFO L226 Difference]: Without dead ends: 134 [2022-03-15 17:20:42,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-03-15 17:20:42,018 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 168 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 17:20:42,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 0 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 17:20:42,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-03-15 17:20:42,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-03-15 17:20:42,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.9473684210526314) internal successors, (392), 133 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:42,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 392 transitions. [2022-03-15 17:20:42,021 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 392 transitions. Word has length 16 [2022-03-15 17:20:42,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:20:42,021 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 392 transitions. [2022-03-15 17:20:42,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:42,021 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 392 transitions. [2022-03-15 17:20:42,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 17:20:42,022 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:20:42,022 INFO L514 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1] [2022-03-15 17:20:42,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 17:20:42,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-15 17:20:42,239 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:20:42,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:20:42,240 INFO L85 PathProgramCache]: Analyzing trace with hash -359363762, now seen corresponding path program 11 times [2022-03-15 17:20:42,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:20:42,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176914149] [2022-03-15 17:20:42,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:20:42,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:20:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:20:42,318 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:42,318 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:20:42,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176914149] [2022-03-15 17:20:42,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176914149] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:20:42,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359354673] [2022-03-15 17:20:42,318 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:20:42,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:20:42,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:20:42,319 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:20:42,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 17:20:42,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 17:20:42,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:20:42,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 17:20:42,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:20:42,417 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:42,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:20:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:42,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359354673] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:20:42,492 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:20:42,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2022-03-15 17:20:42,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1107989449] [2022-03-15 17:20:42,492 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 17:20:42,493 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 17:20:42,495 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 17 transitions. [2022-03-15 17:20:42,495 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 17:20:42,495 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 17:20:42,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 17:20:42,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:20:42,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 17:20:42,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-03-15 17:20:42,496 INFO L87 Difference]: Start difference. First operand 134 states and 392 transitions. Second operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:42,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:20:42,565 INFO L93 Difference]: Finished difference Result 143 states and 419 transitions. [2022-03-15 17:20:42,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 17:20:42,565 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 17:20:42,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:20:42,566 INFO L225 Difference]: With dead ends: 143 [2022-03-15 17:20:42,566 INFO L226 Difference]: Without dead ends: 143 [2022-03-15 17:20:42,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-03-15 17:20:42,566 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 132 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 17:20:42,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 0 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 17:20:42,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-15 17:20:42,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-03-15 17:20:42,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.9507042253521125) internal successors, (419), 142 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:42,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 419 transitions. [2022-03-15 17:20:42,570 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 419 transitions. Word has length 17 [2022-03-15 17:20:42,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:20:42,570 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 419 transitions. [2022-03-15 17:20:42,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:42,570 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 419 transitions. [2022-03-15 17:20:42,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 17:20:42,570 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:20:42,570 INFO L514 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1] [2022-03-15 17:20:42,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 17:20:42,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-15 17:20:42,786 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:20:42,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:20:42,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1744625442, now seen corresponding path program 12 times [2022-03-15 17:20:42,787 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:20:42,787 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585188791] [2022-03-15 17:20:42,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:20:42,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:20:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:20:42,876 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:42,876 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:20:42,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585188791] [2022-03-15 17:20:42,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585188791] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:20:42,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717194137] [2022-03-15 17:20:42,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:20:42,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:20:42,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:20:42,878 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:20:42,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 17:20:42,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 17:20:42,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:20:42,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 17:20:42,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:20:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:42,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:20:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:43,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717194137] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:20:43,051 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:20:43,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 18 [2022-03-15 17:20:43,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [157545907] [2022-03-15 17:20:43,051 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 17:20:43,053 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 17:20:43,056 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 18 transitions. [2022-03-15 17:20:43,056 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 17:20:43,056 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 17:20:43,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 17:20:43,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:20:43,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 17:20:43,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-03-15 17:20:43,078 INFO L87 Difference]: Start difference. First operand 143 states and 419 transitions. Second operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:43,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:20:43,158 INFO L93 Difference]: Finished difference Result 152 states and 446 transitions. [2022-03-15 17:20:43,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 17:20:43,159 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 17:20:43,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:20:43,160 INFO L225 Difference]: With dead ends: 152 [2022-03-15 17:20:43,160 INFO L226 Difference]: Without dead ends: 152 [2022-03-15 17:20:43,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-03-15 17:20:43,161 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 162 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 17:20:43,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 0 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 17:20:43,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-15 17:20:43,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-03-15 17:20:43,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.9536423841059603) internal successors, (446), 151 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:43,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 446 transitions. [2022-03-15 17:20:43,165 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 446 transitions. Word has length 18 [2022-03-15 17:20:43,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:20:43,165 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 446 transitions. [2022-03-15 17:20:43,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:43,165 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 446 transitions. [2022-03-15 17:20:43,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 17:20:43,166 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:20:43,166 INFO L514 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1] [2022-03-15 17:20:43,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 17:20:43,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-15 17:20:43,376 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:20:43,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:20:43,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1751185970, now seen corresponding path program 13 times [2022-03-15 17:20:43,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:20:43,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260501805] [2022-03-15 17:20:43,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:20:43,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:20:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:20:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:43,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:20:43,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260501805] [2022-03-15 17:20:43,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260501805] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:20:43,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563424952] [2022-03-15 17:20:43,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:20:43,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:20:43,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:20:43,484 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:20:43,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 17:20:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:20:43,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 17:20:43,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:20:43,616 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:43,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:20:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:43,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563424952] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:20:43,690 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:20:43,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 18 [2022-03-15 17:20:43,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [207136416] [2022-03-15 17:20:43,690 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 17:20:43,692 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 17:20:43,693 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 19 transitions. [2022-03-15 17:20:43,694 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 17:20:43,694 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 17:20:43,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 17:20:43,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:20:43,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 17:20:43,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-03-15 17:20:43,695 INFO L87 Difference]: Start difference. First operand 152 states and 446 transitions. Second operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:43,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:20:43,794 INFO L93 Difference]: Finished difference Result 161 states and 473 transitions. [2022-03-15 17:20:43,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 17:20:43,795 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 17:20:43,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:20:43,796 INFO L225 Difference]: With dead ends: 161 [2022-03-15 17:20:43,796 INFO L226 Difference]: Without dead ends: 161 [2022-03-15 17:20:43,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-03-15 17:20:43,796 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 258 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 17:20:43,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 0 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 17:20:43,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-15 17:20:43,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-03-15 17:20:43,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.95625) internal successors, (473), 160 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:43,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 473 transitions. [2022-03-15 17:20:43,801 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 473 transitions. Word has length 19 [2022-03-15 17:20:43,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:20:43,801 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 473 transitions. [2022-03-15 17:20:43,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:43,801 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 473 transitions. [2022-03-15 17:20:43,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 17:20:43,802 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:20:43,802 INFO L514 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1] [2022-03-15 17:20:43,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 17:20:44,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-15 17:20:44,011 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:20:44,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:20:44,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1547809954, now seen corresponding path program 14 times [2022-03-15 17:20:44,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:20:44,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834767575] [2022-03-15 17:20:44,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:20:44,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:20:44,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:20:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:44,120 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:20:44,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834767575] [2022-03-15 17:20:44,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834767575] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:20:44,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546238005] [2022-03-15 17:20:44,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:20:44,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:20:44,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:20:44,121 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:20:44,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 17:20:44,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:20:44,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:20:44,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 17:20:44,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:20:44,233 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:44,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:20:44,274 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:44,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546238005] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:20:44,275 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:20:44,275 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 18 [2022-03-15 17:20:44,275 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1074508251] [2022-03-15 17:20:44,275 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 17:20:44,276 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 17:20:44,278 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 20 transitions. [2022-03-15 17:20:44,278 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 17:20:44,278 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 17:20:44,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 17:20:44,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:20:44,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 17:20:44,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-03-15 17:20:44,279 INFO L87 Difference]: Start difference. First operand 161 states and 473 transitions. Second operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:44,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:20:44,370 INFO L93 Difference]: Finished difference Result 170 states and 500 transitions. [2022-03-15 17:20:44,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 17:20:44,370 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 17:20:44,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:20:44,371 INFO L225 Difference]: With dead ends: 170 [2022-03-15 17:20:44,371 INFO L226 Difference]: Without dead ends: 170 [2022-03-15 17:20:44,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-03-15 17:20:44,371 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 222 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 17:20:44,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 0 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 17:20:44,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-03-15 17:20:44,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-03-15 17:20:44,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.9585798816568047) internal successors, (500), 169 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:44,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 500 transitions. [2022-03-15 17:20:44,375 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 500 transitions. Word has length 20 [2022-03-15 17:20:44,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:20:44,375 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 500 transitions. [2022-03-15 17:20:44,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:44,375 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 500 transitions. [2022-03-15 17:20:44,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 17:20:44,376 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:20:44,376 INFO L514 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1] [2022-03-15 17:20:44,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-15 17:20:44,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:20:44,591 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:20:44,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:20:44,592 INFO L85 PathProgramCache]: Analyzing trace with hash 737468494, now seen corresponding path program 15 times [2022-03-15 17:20:44,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:20:44,593 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932021349] [2022-03-15 17:20:44,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:20:44,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:20:44,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:20:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:44,720 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:20:44,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932021349] [2022-03-15 17:20:44,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932021349] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:20:44,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854253529] [2022-03-15 17:20:44,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:20:44,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:20:44,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:20:44,721 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:20:44,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 17:20:44,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-15 17:20:44,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:20:44,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 17:20:44,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:20:44,827 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:44,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:20:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:44,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854253529] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:20:44,889 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:20:44,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 18 [2022-03-15 17:20:44,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1333060308] [2022-03-15 17:20:44,889 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 17:20:44,891 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 17:20:44,893 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 21 transitions. [2022-03-15 17:20:44,893 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 17:20:44,893 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 17:20:44,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 17:20:44,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:20:44,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 17:20:44,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-03-15 17:20:44,894 INFO L87 Difference]: Start difference. First operand 170 states and 500 transitions. Second operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:44,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:20:44,987 INFO L93 Difference]: Finished difference Result 179 states and 527 transitions. [2022-03-15 17:20:44,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 17:20:44,987 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 17:20:44,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:20:44,988 INFO L225 Difference]: With dead ends: 179 [2022-03-15 17:20:44,988 INFO L226 Difference]: Without dead ends: 179 [2022-03-15 17:20:44,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-03-15 17:20:44,989 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 417 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 17:20:44,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 0 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 17:20:44,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-15 17:20:44,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-03-15 17:20:44,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.960674157303371) internal successors, (527), 178 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:44,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 527 transitions. [2022-03-15 17:20:44,993 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 527 transitions. Word has length 21 [2022-03-15 17:20:44,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:20:44,993 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 527 transitions. [2022-03-15 17:20:44,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:20:44,993 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 527 transitions. [2022-03-15 17:20:44,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 17:20:44,994 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:20:44,994 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1] [2022-03-15 17:20:45,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 17:20:45,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-15 17:20:45,207 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:20:45,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:20:45,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1386687010, now seen corresponding path program 16 times [2022-03-15 17:20:45,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:20:45,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961830404] [2022-03-15 17:20:45,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:20:45,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:20:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:20:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:45,559 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:20:45,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961830404] [2022-03-15 17:20:45,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961830404] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:20:45,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144260515] [2022-03-15 17:20:45,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:20:45,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:20:45,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:20:45,560 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:20:45,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 17:20:45,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:20:45,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:20:45,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-15 17:20:45,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:20:46,198 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:20:46,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:22:17,391 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:22:17,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144260515] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:22:17,392 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:22:17,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2022-03-15 17:22:17,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [842952735] [2022-03-15 17:22:17,392 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 17:22:17,394 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 17:22:17,396 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 22 transitions. [2022-03-15 17:22:17,396 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 17:22:17,396 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 17:22:17,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 17:22:17,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:22:17,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 17:22:17,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=2246, Unknown=29, NotChecked=0, Total=2756 [2022-03-15 17:22:17,398 INFO L87 Difference]: Start difference. First operand 179 states and 527 transitions. Second operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:22:18,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:22:18,611 INFO L93 Difference]: Finished difference Result 328 states and 970 transitions. [2022-03-15 17:22:18,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 17:22:18,611 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 17:22:18,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:22:18,613 INFO L225 Difference]: With dead ends: 328 [2022-03-15 17:22:18,613 INFO L226 Difference]: Without dead ends: 328 [2022-03-15 17:22:18,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 80.2s TimeCoverageRelationStatistics Valid=481, Invalid=2246, Unknown=29, NotChecked=0, Total=2756 [2022-03-15 17:22:18,614 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 2167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 17:22:18,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 2167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2167 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-15 17:22:18,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-03-15 17:22:18,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 312. [2022-03-15 17:22:18,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.067524115755627) internal successors, (954), 311 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:22:18,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 954 transitions. [2022-03-15 17:22:18,620 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 954 transitions. Word has length 22 [2022-03-15 17:22:18,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:22:18,620 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 954 transitions. [2022-03-15 17:22:18,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:22:18,620 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 954 transitions. [2022-03-15 17:22:18,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 17:22:18,621 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:22:18,621 INFO L514 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1] [2022-03-15 17:22:18,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-15 17:22:18,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-15 17:22:18,835 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:22:18,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:22:18,836 INFO L85 PathProgramCache]: Analyzing trace with hash 37624526, now seen corresponding path program 17 times [2022-03-15 17:22:18,837 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:22:18,837 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096172544] [2022-03-15 17:22:18,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:22:18,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:22:18,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:22:19,031 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 137 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:22:19,032 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:22:19,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096172544] [2022-03-15 17:22:19,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096172544] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:22:19,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600388967] [2022-03-15 17:22:19,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:22:19,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:22:19,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:22:19,034 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:22:19,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 17:22:19,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-03-15 17:22:19,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:22:19,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 17:22:19,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:22:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:22:19,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-15 17:22:19,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600388967] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 17:22:19,169 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-15 17:22:19,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [19] total 20 [2022-03-15 17:22:19,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [364784679] [2022-03-15 17:22:19,169 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 17:22:19,171 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 17:22:19,173 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 23 transitions. [2022-03-15 17:22:19,174 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 17:22:19,174 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 17:22:19,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 17:22:19,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:22:19,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 17:22:19,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=206, Unknown=0, NotChecked=0, Total=380 [2022-03-15 17:22:19,175 INFO L87 Difference]: Start difference. First operand 312 states and 954 transitions. Second operand has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:22:19,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:22:19,457 INFO L93 Difference]: Finished difference Result 326 states and 947 transitions. [2022-03-15 17:22:19,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 17:22:19,457 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 17:22:19,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:22:19,459 INFO L225 Difference]: With dead ends: 326 [2022-03-15 17:22:19,459 INFO L226 Difference]: Without dead ends: 308 [2022-03-15 17:22:19,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=206, Unknown=0, NotChecked=0, Total=380 [2022-03-15 17:22:19,460 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 107 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 17:22:19,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 0 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 17:22:19,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-03-15 17:22:19,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2022-03-15 17:22:19,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.9120521172638436) internal successors, (894), 307 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:22:19,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 894 transitions. [2022-03-15 17:22:19,465 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 894 transitions. Word has length 23 [2022-03-15 17:22:19,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:22:19,466 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 894 transitions. [2022-03-15 17:22:19,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:22:19,466 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 894 transitions. [2022-03-15 17:22:19,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 17:22:19,466 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:22:19,466 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:22:19,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 17:22:19,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-15 17:22:19,683 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:22:19,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:22:19,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1885040174, now seen corresponding path program 1 times [2022-03-15 17:22:19,686 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:22:19,686 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772022271] [2022-03-15 17:22:19,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:22:19,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:22:19,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:22:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:22:20,060 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:22:20,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772022271] [2022-03-15 17:22:20,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772022271] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:22:20,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864538845] [2022-03-15 17:22:20,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:22:20,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:22:20,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:22:20,062 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:22:20,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 17:22:20,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:22:20,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-15 17:22:20,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:22:20,931 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:22:20,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:23:35,193 WARN L228 SmtUtils]: Spent 5.77s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 17:24:37,588 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:24:37,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864538845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:24:37,589 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:24:37,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 54 [2022-03-15 17:24:37,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [404624535] [2022-03-15 17:24:37,589 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 17:24:37,591 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 17:24:37,598 INFO L252 McrAutomatonBuilder]: Finished intersection with 59 states and 92 transitions. [2022-03-15 17:24:37,598 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 17:24:39,228 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 16 new interpolants: [9298#(and (<= (+ 985 ~j~0 ~i~0) (+ (* ~cur~0 21) (* ~prev~0 13))) (<= (+ ~i~0 986) (+ (* ~cur~0 21) (* ~prev~0 13)))), 9304#(and (<= (+ 985 ~j~0 ~i~0) (+ (* ~cur~0 377) (* 233 ~prev~0))) (<= (+ ~i~0 986) (+ (* ~cur~0 377) (* 233 ~prev~0)))), 9291#(and (<= (+ ~i~0 986) ~cur~0) (<= (+ 985 ~j~0 ~i~0) ~cur~0)), 9295#(and (<= (+ 985 ~j~0 ~i~0) (+ (* 5 ~cur~0) (* ~prev~0 3))) (<= (+ ~i~0 986) (+ (* 5 ~cur~0) (* ~prev~0 3)))), 9293#(and (<= (+ 985 ~j~0 ~i~0) (+ ~prev~0 (* ~cur~0 2))) (<= (+ ~i~0 986) (+ ~prev~0 (* ~cur~0 2)))), 9292#(and (<= (+ 985 ~j~0 ~i~0) (+ ~prev~0 ~cur~0)) (<= (+ ~i~0 986) (+ ~prev~0 ~cur~0))), 9294#(and (<= (+ 985 ~j~0 ~i~0) (+ (* ~cur~0 3) (* ~prev~0 2))) (<= (+ ~i~0 986) (+ (* ~cur~0 3) (* ~prev~0 2)))), 9301#(and (<= (+ ~i~0 986) (+ (* ~prev~0 55) (* ~cur~0 89))) (<= (+ 985 ~j~0 ~i~0) (+ (* ~prev~0 55) (* ~cur~0 89)))), 9290#(and (<= (+ ~i~0 986) ~prev~0) (<= (+ 985 ~j~0 ~i~0) ~prev~0)), 9296#(and (<= (+ ~i~0 986) (+ (* ~prev~0 5) (* ~cur~0 8))) (<= (+ 985 ~j~0 ~i~0) (+ (* ~prev~0 5) (* ~cur~0 8)))), 9303#(and (<= (+ ~i~0 986) (+ (* 233 ~cur~0) (* ~prev~0 144))) (<= (+ 985 ~j~0 ~i~0) (+ (* 233 ~cur~0) (* ~prev~0 144)))), 9297#(and (<= (+ ~i~0 986) (+ (* ~prev~0 8) (* ~cur~0 13))) (<= (+ 985 ~j~0 ~i~0) (+ (* ~prev~0 8) (* ~cur~0 13)))), 9305#(and (<= (+ 985 ~j~0 ~i~0) (+ (* ~prev~0 377) (* 610 ~cur~0))) (<= (+ ~i~0 986) (+ (* ~prev~0 377) (* 610 ~cur~0)))), 9300#(and (<= (+ 985 ~j~0 ~i~0) (+ (* ~cur~0 55) (* ~prev~0 34))) (<= (+ ~i~0 986) (+ (* ~cur~0 55) (* ~prev~0 34)))), 9302#(and (<= (+ 985 ~j~0 ~i~0) (+ (* ~prev~0 89) (* ~cur~0 144))) (<= (+ ~i~0 986) (+ (* ~prev~0 89) (* ~cur~0 144)))), 9299#(and (<= (+ 985 ~j~0 ~i~0) (+ (* ~cur~0 34) (* ~prev~0 21))) (<= (+ ~i~0 986) (+ (* ~cur~0 34) (* ~prev~0 21))))] [2022-03-15 17:24:39,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 17:24:39,228 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:24:39,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 17:24:39,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=4327, Unknown=40, NotChecked=0, Total=5112 [2022-03-15 17:24:39,229 INFO L87 Difference]: Start difference. First operand 308 states and 894 transitions. Second operand has 36 states, 35 states have (on average 2.085714285714286) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:24:42,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:24:42,480 INFO L93 Difference]: Finished difference Result 416 states and 1212 transitions. [2022-03-15 17:24:42,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 17:24:42,481 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.085714285714286) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 17:24:42,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:24:42,482 INFO L225 Difference]: With dead ends: 416 [2022-03-15 17:24:42,482 INFO L226 Difference]: Without dead ends: 398 [2022-03-15 17:24:42,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1825 ImplicationChecksByTransitivity, 113.1s TimeCoverageRelationStatistics Valid=922, Invalid=6870, Unknown=40, NotChecked=0, Total=7832 [2022-03-15 17:24:42,484 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 173 mSDsluCounter, 2363 mSDsCounter, 0 mSdLazyCounter, 4237 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-15 17:24:42,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 0 Invalid, 4238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4237 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-15 17:24:42,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-03-15 17:24:42,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 362. [2022-03-15 17:24:42,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 3.0166204986149583) internal successors, (1089), 361 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:24:42,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1089 transitions. [2022-03-15 17:24:42,496 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1089 transitions. Word has length 24 [2022-03-15 17:24:42,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:24:42,497 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 1089 transitions. [2022-03-15 17:24:42,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.085714285714286) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:24:42,497 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1089 transitions. [2022-03-15 17:24:42,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 17:24:42,498 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:24:42,498 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:24:42,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 17:24:42,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:24:42,706 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:24:42,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:24:42,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1166301892, now seen corresponding path program 1 times [2022-03-15 17:24:42,707 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:24:42,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048343613] [2022-03-15 17:24:42,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:24:42,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:24:42,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:24:43,151 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:24:43,151 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:24:43,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048343613] [2022-03-15 17:24:43,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048343613] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:24:43,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095512691] [2022-03-15 17:24:43,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:24:43,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:24:43,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:24:43,153 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:24:43,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 17:24:43,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:24:43,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-15 17:24:43,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:24:44,084 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:24:44,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:26:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:26:52,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095512691] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:26:52,121 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:26:52,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 54 [2022-03-15 17:26:52,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [679392528] [2022-03-15 17:26:52,121 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 17:26:52,123 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 17:26:52,130 INFO L252 McrAutomatonBuilder]: Finished intersection with 63 states and 100 transitions. [2022-03-15 17:26:52,131 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 17:26:55,293 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 17 new interpolants: [10687#(and (<= (+ ~i~0 986) (+ (* ~cur~0 377) ~j~0 (* 233 ~prev~0))) (<= 987 (+ (* ~cur~0 377) (* 233 ~prev~0))) (= ~j~0 1)), 10682#(and (= ~j~0 1) (<= 987 (+ (* ~cur~0 34) (* ~prev~0 21))) (<= (+ ~i~0 986) (+ ~j~0 (* ~cur~0 34) (* ~prev~0 21)))), 10685#(and (= ~j~0 1) (<= (+ ~i~0 986) (+ (* ~prev~0 89) ~j~0 (* ~cur~0 144))) (<= 987 (+ (* ~prev~0 89) (* ~cur~0 144)))), 10674#(and (<= 987 ~cur~0) (<= (+ ~i~0 986) (+ ~cur~0 ~j~0)) (= (+ (- 1) ~j~0) 0)), 10679#(and (<= 987 (+ (* ~prev~0 5) (* ~cur~0 8))) (= ~j~0 1) (<= (+ ~i~0 986) (+ (* ~prev~0 5) (* ~cur~0 8) ~j~0))), 10690#(and (= ~j~0 1) (<= (+ ~i~0 986) (+ (* ~cur~0 987) (* ~prev~0 610))) (<= 987 (+ (* ~cur~0 987) (* ~prev~0 610)))), 10677#(and (<= (+ ~i~0 986) (+ (* ~cur~0 3) (* ~prev~0 2) ~j~0)) (<= 987 (+ (* ~cur~0 3) (* ~prev~0 2))) (= ~j~0 1)), 10686#(and (<= (+ ~i~0 986) (+ (* 233 ~cur~0) ~j~0 (* ~prev~0 144))) (= ~j~0 1) (<= 987 (+ (* 233 ~cur~0) (* ~prev~0 144)))), 10683#(and (= ~j~0 1) (<= 987 (+ (* ~cur~0 55) (* ~prev~0 34))) (<= (+ ~i~0 986) (+ ~j~0 (* ~cur~0 55) (* ~prev~0 34)))), 10676#(and (<= (+ ~i~0 986) (+ ~prev~0 ~j~0 (* ~cur~0 2))) (= (+ (- 1) ~j~0) 0) (<= 987 (+ ~prev~0 (* ~cur~0 2)))), 10675#(and (<= 987 (+ ~prev~0 ~cur~0)) (= (+ (- 1) ~j~0) 0) (<= (+ ~i~0 986) (+ ~prev~0 ~cur~0 ~j~0))), 10681#(and (<= 987 (+ (* ~cur~0 21) (* ~prev~0 13))) (= ~j~0 1) (<= (+ ~i~0 986) (+ (* ~cur~0 21) (* ~prev~0 13) ~j~0))), 10678#(and (= ~j~0 1) (<= (+ ~i~0 986) (+ (* 5 ~cur~0) ~j~0 (* ~prev~0 3))) (<= 987 (+ (* 5 ~cur~0) (* ~prev~0 3)))), 10680#(and (<= 987 (+ (* ~prev~0 8) (* ~cur~0 13))) (<= (+ ~i~0 986) (+ (* ~prev~0 8) ~j~0 (* ~cur~0 13))) (= ~j~0 1)), 10688#(and (<= 987 (+ (* ~prev~0 377) (* 610 ~cur~0))) (= ~j~0 1) (<= (+ ~i~0 986) (+ (* ~prev~0 377) (* 610 ~cur~0) ~j~0))), 10684#(and (= ~j~0 1) (<= 987 (+ (* ~prev~0 55) (* ~cur~0 89))) (<= (+ ~i~0 986) (+ ~j~0 (* ~prev~0 55) (* ~cur~0 89)))), 10689#(and (<= (+ ~i~0 986) (+ (* ~cur~0 987) ~j~0 (* ~prev~0 610))) (= ~j~0 1) (<= 987 (+ (* ~cur~0 987) (* ~prev~0 610))))] [2022-03-15 17:26:55,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 17:26:55,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:26:55,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 17:26:55,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=4646, Unknown=38, NotChecked=0, Total=5256 [2022-03-15 17:26:55,295 INFO L87 Difference]: Start difference. First operand 362 states and 1089 transitions. Second operand has 37 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:27:03,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:27:03,707 INFO L93 Difference]: Finished difference Result 2226 states and 6447 transitions. [2022-03-15 17:27:03,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-15 17:27:03,708 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 17:27:03,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:27:03,716 INFO L225 Difference]: With dead ends: 2226 [2022-03-15 17:27:03,716 INFO L226 Difference]: Without dead ends: 2192 [2022-03-15 17:27:03,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 16 SyntacticMatches, 15 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3805 ImplicationChecksByTransitivity, 118.6s TimeCoverageRelationStatistics Valid=2909, Invalid=11095, Unknown=38, NotChecked=0, Total=14042 [2022-03-15 17:27:03,719 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 486 mSDsluCounter, 1877 mSDsCounter, 0 mSdLazyCounter, 3499 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 3499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:27:03,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 0 Invalid, 3734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 3499 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-03-15 17:27:03,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2022-03-15 17:27:03,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 438. [2022-03-15 17:27:03,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.9130434782608696) internal successors, (1273), 437 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:27:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1273 transitions. [2022-03-15 17:27:03,742 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1273 transitions. Word has length 24 [2022-03-15 17:27:03,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:27:03,743 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 1273 transitions. [2022-03-15 17:27:03,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:27:03,743 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1273 transitions. [2022-03-15 17:27:03,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 17:27:03,744 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:27:03,744 INFO L514 BasicCegarLoop]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:27:03,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 17:27:03,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:27:03,959 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:27:03,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:27:03,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1604598017, now seen corresponding path program 2 times [2022-03-15 17:27:03,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:27:03,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988435368] [2022-03-15 17:27:03,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:27:03,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:27:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:27:04,598 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:27:04,598 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:27:04,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988435368] [2022-03-15 17:27:04,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988435368] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:27:04,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771932086] [2022-03-15 17:27:04,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:27:04,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:27:04,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:27:04,599 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:27:04,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 17:27:04,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:27:04,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:27:04,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-15 17:27:04,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:27:06,104 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 105 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:27:06,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:29:44,759 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:29:44,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771932086] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:29:44,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:29:44,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2022-03-15 17:29:44,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1348403336] [2022-03-15 17:29:44,759 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 17:29:44,761 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 17:29:44,770 INFO L252 McrAutomatonBuilder]: Finished intersection with 77 states and 127 transitions. [2022-03-15 17:29:44,770 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 17:29:50,792 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 32 new interpolants: [14108#(and (<= (+ ~i~0 986) (+ (* ~cur~0 55) (* ~prev~0 34))) (<= (+ 984 ~j~0 ~i~0) (+ (* ~cur~0 55) (* ~prev~0 34)))), 14094#(and (<= (+ 984 ~j~0 ~i~0) (+ (* ~prev~0 5) (* ~cur~0 8))) (<= (+ ~i~0 986) (+ (* ~prev~0 5) (* ~cur~0 8)))), 14101#(and (<= (+ ~i~0 986) (+ ~prev~0 (* ~cur~0 2))) (<= (+ 984 ~j~0 (* 2 ~i~0)) (+ ~prev~0 (* ~cur~0 2)))), 14090#(and (<= (+ 984 ~j~0 ~i~0) (+ ~prev~0 ~cur~0)) (<= (+ ~i~0 986) (+ ~prev~0 ~cur~0))), 14117#(and (<= (+ ~i~0 986) (+ (* 233 ~cur~0) (* ~prev~0 144))) (<= (+ 984 ~j~0 (* 2 ~i~0)) (+ (* 233 ~cur~0) (* ~prev~0 144)))), 14115#(and (<= (+ 984 ~j~0 ~i~0) (+ (* ~prev~0 377) (* 610 ~cur~0))) (<= (+ ~i~0 986) (+ (* ~prev~0 377) (* 610 ~cur~0)))), 14105#(and (<= (+ ~i~0 986) (+ (* ~prev~0 8) (* ~cur~0 13))) (<= (+ 984 ~j~0 (* 2 ~i~0)) (+ (* ~prev~0 8) (* ~cur~0 13)))), 14089#(and (<= (+ ~i~0 986) ~cur~0) (<= (+ 984 ~j~0 ~i~0) ~cur~0)), 14116#(and (<= (+ 984 ~j~0 (* 2 ~i~0)) (+ (* ~prev~0 89) (* ~cur~0 144))) (<= (+ ~i~0 986) (+ (* ~prev~0 89) (* ~cur~0 144)))), 14110#(and (<= (+ 984 ~j~0 ~i~0) (+ (* ~prev~0 89) (* ~cur~0 144))) (<= (+ ~i~0 986) (+ (* ~prev~0 89) (* ~cur~0 144)))), 14091#(and (<= (+ 984 ~j~0 ~i~0) (+ ~prev~0 (* ~cur~0 2))) (<= (+ ~i~0 986) (+ ~prev~0 (* ~cur~0 2)))), 14099#(and (<= (+ 984 ~j~0 (* 2 ~i~0)) ~cur~0) (<= (+ ~i~0 986) ~cur~0)), 14114#(and (<= (+ 984 ~j~0 ~i~0) (+ (* ~cur~0 377) (* 233 ~prev~0))) (<= (+ ~i~0 986) (+ (* ~cur~0 377) (* 233 ~prev~0)))), 14106#(and (<= (+ 984 ~j~0 (* 2 ~i~0)) (+ (* ~cur~0 21) (* ~prev~0 13))) (<= (+ ~i~0 986) (+ (* ~cur~0 21) (* ~prev~0 13)))), 14113#(and (<= (+ ~i~0 986) (+ (* ~prev~0 55) (* ~cur~0 89))) (<= (+ 984 ~j~0 (* 2 ~i~0)) (+ (* ~prev~0 55) (* ~cur~0 89)))), 14098#(and (<= (+ ~i~0 986) ~prev~0) (<= (+ 984 ~j~0 (* 2 ~i~0)) ~prev~0)), 14088#(and (<= (+ ~i~0 986) ~prev~0) (<= (+ 984 ~j~0 ~i~0) ~prev~0)), 14112#(and (<= (+ ~i~0 986) (+ (* ~cur~0 55) (* ~prev~0 34))) (<= (+ 984 ~j~0 (* 2 ~i~0)) (+ (* ~cur~0 55) (* ~prev~0 34)))), 14103#(and (<= (+ 984 ~j~0 (* 2 ~i~0)) (+ (* 5 ~cur~0) (* ~prev~0 3))) (<= (+ ~i~0 986) (+ (* 5 ~cur~0) (* ~prev~0 3)))), 14095#(and (<= (+ 984 ~j~0 ~i~0) (+ (* ~prev~0 8) (* ~cur~0 13))) (<= (+ ~i~0 986) (+ (* ~prev~0 8) (* ~cur~0 13)))), 14104#(and (<= (+ 984 ~j~0 (* 2 ~i~0)) (+ (* ~prev~0 5) (* ~cur~0 8))) (<= (+ ~i~0 986) (+ (* ~prev~0 5) (* ~cur~0 8)))), 14119#(and (<= (+ ~i~0 986) (+ (* ~prev~0 377) (* 610 ~cur~0))) (<= (+ 984 ~j~0 (* 2 ~i~0)) (+ (* ~prev~0 377) (* 610 ~cur~0)))), 14102#(and (<= (+ 984 ~j~0 (* 2 ~i~0)) (+ (* ~cur~0 3) (* ~prev~0 2))) (<= (+ ~i~0 986) (+ (* ~cur~0 3) (* ~prev~0 2)))), 14107#(and (<= (+ 984 ~j~0 (* 2 ~i~0)) (+ (* ~cur~0 34) (* ~prev~0 21))) (<= (+ ~i~0 986) (+ (* ~cur~0 34) (* ~prev~0 21)))), 14109#(and (<= (+ ~i~0 986) (+ (* ~prev~0 55) (* ~cur~0 89))) (<= (+ 984 ~j~0 ~i~0) (+ (* ~prev~0 55) (* ~cur~0 89)))), 14100#(and (<= (+ 984 ~j~0 (* 2 ~i~0)) (+ ~prev~0 ~cur~0)) (<= (+ ~i~0 986) (+ ~prev~0 ~cur~0))), 14111#(and (<= (+ ~i~0 986) (+ (* 233 ~cur~0) (* ~prev~0 144))) (<= (+ 984 ~j~0 ~i~0) (+ (* 233 ~cur~0) (* ~prev~0 144)))), 14118#(and (<= (+ ~i~0 986) (+ (* ~cur~0 377) (* 233 ~prev~0))) (<= (+ 984 ~j~0 (* 2 ~i~0)) (+ (* ~cur~0 377) (* 233 ~prev~0)))), 14097#(and (<= (+ ~i~0 986) (+ (* ~cur~0 34) (* ~prev~0 21))) (<= (+ 984 ~j~0 ~i~0) (+ (* ~cur~0 34) (* ~prev~0 21)))), 14096#(and (<= (+ 984 ~j~0 ~i~0) (+ (* ~cur~0 21) (* ~prev~0 13))) (<= (+ ~i~0 986) (+ (* ~cur~0 21) (* ~prev~0 13)))), 14093#(and (<= (+ 984 ~j~0 ~i~0) (+ (* 5 ~cur~0) (* ~prev~0 3))) (<= (+ ~i~0 986) (+ (* 5 ~cur~0) (* ~prev~0 3)))), 14092#(and (<= (+ 984 ~j~0 ~i~0) (+ (* ~cur~0 3) (* ~prev~0 2))) (<= (+ ~i~0 986) (+ (* ~cur~0 3) (* ~prev~0 2))))] [2022-03-15 17:29:50,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-15 17:29:50,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:29:50,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-15 17:29:50,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=7239, Unknown=46, NotChecked=0, Total=8190 [2022-03-15 17:29:50,795 INFO L87 Difference]: Start difference. First operand 438 states and 1273 transitions. Second operand has 53 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 52 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:30:05,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:30:05,219 INFO L93 Difference]: Finished difference Result 600 states and 1750 transitions. [2022-03-15 17:30:05,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 17:30:05,219 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 52 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 17:30:05,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:30:05,222 INFO L225 Difference]: With dead ends: 600 [2022-03-15 17:30:05,222 INFO L226 Difference]: Without dead ends: 582 [2022-03-15 17:30:05,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3435 ImplicationChecksByTransitivity, 130.3s TimeCoverageRelationStatistics Valid=1295, Invalid=14159, Unknown=46, NotChecked=0, Total=15500 [2022-03-15 17:30:05,225 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 343 mSDsluCounter, 3571 mSDsCounter, 0 mSdLazyCounter, 6328 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-03-15 17:30:05,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 0 Invalid, 6330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6328 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2022-03-15 17:30:05,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-03-15 17:30:05,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 492. [2022-03-15 17:30:05,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 2.989816700610998) internal successors, (1468), 491 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:30:05,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1468 transitions. [2022-03-15 17:30:05,235 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1468 transitions. Word has length 25 [2022-03-15 17:30:05,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:30:05,235 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 1468 transitions. [2022-03-15 17:30:05,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 52 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:30:05,236 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1468 transitions. [2022-03-15 17:30:05,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 17:30:05,237 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:30:05,237 INFO L514 BasicCegarLoop]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:30:05,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-15 17:30:05,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-15 17:30:05,451 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:30:05,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:30:05,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1795620491, now seen corresponding path program 2 times [2022-03-15 17:30:05,454 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:30:05,454 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226079919] [2022-03-15 17:30:05,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:30:05,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:30:05,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:30:06,366 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:30:06,367 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:30:06,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226079919] [2022-03-15 17:30:06,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226079919] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:30:06,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195545276] [2022-03-15 17:30:06,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:30:06,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:30:06,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:30:06,368 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:30:06,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 17:30:06,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:30:06,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:30:06,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-15 17:30:06,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:30:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 105 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:30:07,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:31:40,646 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:31:40,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195545276] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:31:40,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:31:40,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2022-03-15 17:31:40,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1362325724] [2022-03-15 17:31:40,646 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 17:31:40,648 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 17:31:40,658 INFO L252 McrAutomatonBuilder]: Finished intersection with 83 states and 139 transitions. [2022-03-15 17:31:40,658 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 17:31:47,876 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 33 new interpolants: [15980#(and (<= 987 (+ (* ~prev~0 5) (* ~cur~0 8))) (= ~j~0 1) (<= (+ ~i~0 986) (+ (* ~prev~0 5) (* ~cur~0 8) (* 2 ~j~0)))), 16002#(and (= ~j~0 1) (<= (+ ~i~0 986) (+ (* ~prev~0 89) ~j~0 (* ~cur~0 144))) (<= 987 (+ (* ~prev~0 89) (* ~cur~0 144)))), 15999#(and (= ~j~0 1) (<= 987 (+ (* ~cur~0 34) (* ~prev~0 21))) (<= (+ ~i~0 986) (+ ~j~0 (* ~cur~0 34) (* ~prev~0 21)))), 15983#(and (= ~j~0 1) (<= (+ ~i~0 986) (+ (* 2 ~j~0) (* ~cur~0 34) (* ~prev~0 21))) (<= 987 (+ (* ~cur~0 34) (* ~prev~0 21)))), 16000#(and (= ~j~0 1) (<= 987 (+ (* ~cur~0 55) (* ~prev~0 34))) (<= (+ ~i~0 986) (+ ~j~0 (* ~cur~0 55) (* ~prev~0 34)))), 16005#(and (<= 987 (+ (* ~prev~0 377) (* 610 ~cur~0))) (= ~j~0 1) (<= (+ ~i~0 986) (+ (* ~prev~0 377) (* 610 ~cur~0) ~j~0))), 15992#(and (<= 987 (+ ~prev~0 ~cur~0)) (= ~j~0 1) (<= (+ ~i~0 986) (+ ~prev~0 ~cur~0 ~j~0))), 15985#(and (= ~j~0 1) (<= 987 (+ (* ~prev~0 55) (* ~cur~0 89))) (<= (+ ~i~0 986) (+ (* 2 ~j~0) (* ~prev~0 55) (* ~cur~0 89)))), 15987#(and (= ~j~0 1) (<= (+ ~i~0 986) (+ (* 233 ~cur~0) (* 2 ~j~0) (* ~prev~0 144))) (<= 987 (+ (* 233 ~cur~0) (* ~prev~0 144)))), 16007#(and (= ~j~0 1) (<= (+ ~i~0 986) (+ (* ~cur~0 987) (* ~prev~0 610))) (<= 987 (+ (* ~cur~0 987) (* ~prev~0 610)))), 15978#(and (<= 987 (+ (* ~cur~0 3) (* ~prev~0 2))) (= ~j~0 1) (<= (+ ~i~0 986) (+ (* ~cur~0 3) (* ~prev~0 2) (* 2 ~j~0)))), 15986#(and (<= (+ ~i~0 986) (+ (* ~prev~0 89) (* 2 ~j~0) (* ~cur~0 144))) (= ~j~0 1) (<= 987 (+ (* ~prev~0 89) (* ~cur~0 144)))), 15997#(and (<= 987 (+ (* ~prev~0 8) (* ~cur~0 13))) (<= (+ ~i~0 986) (+ (* ~prev~0 8) ~j~0 (* ~cur~0 13))) (= ~j~0 1)), 16001#(and (= ~j~0 1) (<= 987 (+ (* ~prev~0 55) (* ~cur~0 89))) (<= (+ ~i~0 986) (+ ~j~0 (* ~prev~0 55) (* ~cur~0 89)))), 15996#(and (<= 987 (+ (* ~prev~0 5) (* ~cur~0 8))) (= ~j~0 1) (<= (+ ~i~0 986) (+ (* ~prev~0 5) (* ~cur~0 8) ~j~0))), 15982#(and (<= 987 (+ (* ~cur~0 21) (* ~prev~0 13))) (<= (+ ~i~0 986) (+ (* ~cur~0 21) (* ~prev~0 13) (* 2 ~j~0))) (= ~j~0 1)), 15989#(and (<= 987 (+ (* ~prev~0 377) (* 610 ~cur~0))) (= ~j~0 1) (<= (+ ~i~0 986) (+ (* ~prev~0 377) (* 2 ~j~0) (* 610 ~cur~0)))), 16006#(and (<= (+ ~i~0 986) (+ (* ~cur~0 987) ~j~0 (* ~prev~0 610))) (= ~j~0 1) (<= 987 (+ (* ~cur~0 987) (* ~prev~0 610)))), 15975#(and (<= (+ ~i~0 986) (+ ~cur~0 (* 2 ~j~0))) (<= 987 ~cur~0) (= (+ (- 1) ~j~0) 0)), 15988#(and (<= 987 (+ (* ~cur~0 377) (* 233 ~prev~0))) (= ~j~0 1) (<= (+ ~i~0 986) (+ (* 2 ~j~0) (* ~cur~0 377) (* 233 ~prev~0)))), 16004#(and (<= (+ ~i~0 986) (+ (* ~cur~0 377) ~j~0 (* 233 ~prev~0))) (<= 987 (+ (* ~cur~0 377) (* 233 ~prev~0))) (= ~j~0 1)), 15976#(and (<= 987 (+ ~prev~0 ~cur~0)) (= (+ (- 1) ~j~0) 0) (<= (+ ~i~0 986) (+ ~prev~0 ~cur~0 (* 2 ~j~0)))), 15990#(and (<= (+ ~i~0 986) (+ (* ~cur~0 987) (* 2 ~j~0) (* ~prev~0 610))) (= ~j~0 1) (<= 987 (+ (* ~cur~0 987) (* ~prev~0 610)))), 15984#(and (= ~j~0 1) (<= 987 (+ (* ~cur~0 55) (* ~prev~0 34))) (<= (+ ~i~0 986) (+ (* 2 ~j~0) (* ~cur~0 55) (* ~prev~0 34)))), 15981#(and (<= 987 (+ (* ~prev~0 8) (* ~cur~0 13))) (= ~j~0 1) (<= (+ ~i~0 986) (+ (* 2 ~j~0) (* ~prev~0 8) (* ~cur~0 13)))), 15998#(and (<= 987 (+ (* ~cur~0 21) (* ~prev~0 13))) (= ~j~0 1) (<= (+ ~i~0 986) (+ (* ~cur~0 21) (* ~prev~0 13) ~j~0))), 15993#(and (= ~j~0 1) (<= (+ ~i~0 986) (+ ~prev~0 ~j~0 (* ~cur~0 2))) (<= 987 (+ ~prev~0 (* ~cur~0 2)))), 15991#(and (<= 987 ~cur~0) (<= (+ ~i~0 986) (+ ~cur~0 ~j~0)) (= ~j~0 1)), 16003#(and (<= (+ ~i~0 986) (+ (* 233 ~cur~0) ~j~0 (* ~prev~0 144))) (= ~j~0 1) (<= 987 (+ (* 233 ~cur~0) (* ~prev~0 144)))), 15977#(and (= (+ (- 1) ~j~0) 0) (<= 987 (+ ~prev~0 (* ~cur~0 2))) (<= (+ ~i~0 986) (+ ~prev~0 (* 2 ~j~0) (* ~cur~0 2)))), 15979#(and (<= (+ ~i~0 986) (+ (* 5 ~cur~0) (* 2 ~j~0) (* ~prev~0 3))) (= ~j~0 1) (<= 987 (+ (* 5 ~cur~0) (* ~prev~0 3)))), 15995#(and (= ~j~0 1) (<= (+ ~i~0 986) (+ (* 5 ~cur~0) ~j~0 (* ~prev~0 3))) (<= 987 (+ (* 5 ~cur~0) (* ~prev~0 3)))), 15994#(and (<= (+ ~i~0 986) (+ (* ~cur~0 3) (* ~prev~0 2) ~j~0)) (<= 987 (+ (* ~cur~0 3) (* ~prev~0 2))) (= ~j~0 1))] [2022-03-15 17:31:47,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-15 17:31:47,876 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:31:47,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-15 17:31:47,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=7667, Unknown=26, NotChecked=0, Total=8372 [2022-03-15 17:31:47,877 INFO L87 Difference]: Start difference. First operand 492 states and 1468 transitions. Second operand has 54 states, 53 states have (on average 2.169811320754717) internal successors, (115), 53 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:32:08,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:32:08,232 INFO L93 Difference]: Finished difference Result 3390 states and 9742 transitions. [2022-03-15 17:32:08,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-03-15 17:32:08,233 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 2.169811320754717) internal successors, (115), 53 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 17:32:08,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:32:08,245 INFO L225 Difference]: With dead ends: 3390 [2022-03-15 17:32:08,245 INFO L226 Difference]: Without dead ends: 3356 [2022-03-15 17:32:08,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 19 SyntacticMatches, 15 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11147 ImplicationChecksByTransitivity, 93.5s TimeCoverageRelationStatistics Valid=7856, Invalid=25060, Unknown=26, NotChecked=0, Total=32942 [2022-03-15 17:32:08,247 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 735 mSDsluCounter, 2871 mSDsCounter, 0 mSdLazyCounter, 5311 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 5311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-03-15 17:32:08,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [735 Valid, 0 Invalid, 5648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 5311 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-03-15 17:32:08,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2022-03-15 17:32:08,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 548. [2022-03-15 17:32:08,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.0511882998171846) internal successors, (1669), 547 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:32:08,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1669 transitions. [2022-03-15 17:32:08,270 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1669 transitions. Word has length 25 [2022-03-15 17:32:08,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:32:08,270 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 1669 transitions. [2022-03-15 17:32:08,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 2.169811320754717) internal successors, (115), 53 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:32:08,270 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1669 transitions. [2022-03-15 17:32:08,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 17:32:08,272 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:32:08,272 INFO L514 BasicCegarLoop]: trace histogram [16, 3, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:32:08,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-15 17:32:08,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-15 17:32:08,487 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:32:08,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:32:08,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1500825742, now seen corresponding path program 3 times [2022-03-15 17:32:08,490 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:32:08,490 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994097407] [2022-03-15 17:32:08,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:32:08,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:32:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:32:09,131 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:32:09,131 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:32:09,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994097407] [2022-03-15 17:32:09,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994097407] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:32:09,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785414744] [2022-03-15 17:32:09,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:32:09,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:32:09,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:32:09,132 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:32:09,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 17:32:09,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-15 17:32:09,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:32:09,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-15 17:32:09,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:32:11,081 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 105 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:32:11,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:33:31,936 WARN L228 SmtUtils]: Spent 5.27s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Received shutdown request... [2022-03-15 17:34:51,091 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 17:34:51,118 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 17:34:51,985 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-03-15 17:34:52,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-15 17:34:52,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:34:52,186 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 16,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. [2022-03-15 17:34:52,187 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 17:34:52,187 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 17:34:52,189 INFO L732 BasicCegarLoop]: Path program histogram: [17, 3, 2, 1] [2022-03-15 17:34:52,190 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 17:34:52,190 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 17:34:52,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 05:34:52 BasicIcfg [2022-03-15 17:34:52,195 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 17:34:52,196 INFO L158 Benchmark]: Toolchain (without parser) took 858543.09ms. Allocated memory was 176.2MB in the beginning and 278.9MB in the end (delta: 102.8MB). Free memory was 124.8MB in the beginning and 158.4MB in the end (delta: -33.6MB). Peak memory consumption was 69.3MB. Max. memory is 8.0GB. [2022-03-15 17:34:52,196 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 176.2MB. Free memory is still 142.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 17:34:52,196 INFO L158 Benchmark]: CACSL2BoogieTranslator took 323.70ms. Allocated memory is still 176.2MB. Free memory was 124.7MB in the beginning and 142.6MB in the end (delta: -17.9MB). Peak memory consumption was 12.8MB. Max. memory is 8.0GB. [2022-03-15 17:34:52,197 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.16ms. Allocated memory is still 176.2MB. Free memory was 142.2MB in the beginning and 140.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-15 17:34:52,197 INFO L158 Benchmark]: Boogie Preprocessor took 23.90ms. Allocated memory is still 176.2MB. Free memory was 140.5MB in the beginning and 139.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 17:34:52,197 INFO L158 Benchmark]: RCFGBuilder took 363.26ms. Allocated memory is still 176.2MB. Free memory was 139.0MB in the beginning and 126.4MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-15 17:34:52,199 INFO L158 Benchmark]: TraceAbstraction took 857786.77ms. Allocated memory was 176.2MB in the beginning and 278.9MB in the end (delta: 102.8MB). Free memory was 125.8MB in the beginning and 158.4MB in the end (delta: -32.6MB). Peak memory consumption was 71.1MB. Max. memory is 8.0GB. [2022-03-15 17:34:52,202 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 176.2MB. Free memory is still 142.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 323.70ms. Allocated memory is still 176.2MB. Free memory was 124.7MB in the beginning and 142.6MB in the end (delta: -17.9MB). Peak memory consumption was 12.8MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 41.16ms. Allocated memory is still 176.2MB. Free memory was 142.2MB in the beginning and 140.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.90ms. Allocated memory is still 176.2MB. Free memory was 140.5MB in the beginning and 139.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 363.26ms. Allocated memory is still 176.2MB. Free memory was 139.0MB in the beginning and 126.4MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 857786.77ms. Allocated memory was 176.2MB in the beginning and 278.9MB in the end (delta: 102.8MB). Free memory was 125.8MB in the beginning and 158.4MB in the end (delta: -32.6MB). Peak memory consumption was 71.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.5s, 96 PlacesBefore, 20 PlacesAfterwards, 96 TransitionsBefore, 16 TransitionsAfterwards, 1870 CoEnabledTransitionPairs, 6 FixpointIterations, 30 TrivialSequentialCompositions, 46 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 4 ChoiceCompositions, 92 TotalNumberOfCompositions, 1462 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1325, positive: 1316, positive conditional: 0, positive unconditional: 1316, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 969, positive: 963, positive conditional: 0, positive unconditional: 963, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1325, positive: 353, positive conditional: 0, positive unconditional: 353, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 969, unknown conditional: 0, unknown unconditional: 969] , Statistics on independence cache: Total cache size (in pairs): 3, Positive cache size: 3, Positive conditional cache size: 0, Positive unconditional cache size: 3, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 726]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 16,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 722]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 16,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 721]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 16,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 112 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 857.7s, OverallIterations: 23, TraceHistogramMax: 17, PathProgramHistogramMax: 17, EmptinessCheckTime: 0.0s, AutomataDifference: 49.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.5s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3961 SdHoareTripleChecker+Valid, 24.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3961 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 22.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 12968 mSDsCounter, 660 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 23231 IncrementalHoareTripleChecker+Invalid, 23891 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 660 mSolverCounterUnsat, 0 mSDtfsCounter, 23231 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1271 GetRequests, 441 SyntacticMatches, 40 SemanticMatches, 790 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21261 ImplicationChecksByTransitivity, 537.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=548occurred in iteration=22, InterpolantAutomatonStates: 518, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 22 MinimizatonAttempts, 4704 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 617.6s InterpolantComputationTime, 712 NumberOfCodeBlocks, 712 NumberOfCodeBlocksAsserted, 93 NumberOfCheckSat, 979 ConstructedInterpolants, 77 QuantifiedInterpolants, 17590 SizeOfPredicates, 75 NumberOfNonLiveVariables, 4464 ConjunctsInSsa, 434 ConjunctsInUnsatCore, 63 InterpolantComputations, 2 PerfectInterpolantSequences, 815/4392 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 could not prove your program: Timeout Completed graceful shutdown