./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/discover_list.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/discover_list.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b98ece0168fde0a9f5db629b0589397995dd8e9526df8a73dd8042a19f16d948 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 13:52:32,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 13:52:32,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 13:52:32,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 13:52:32,939 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 13:52:32,940 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 13:52:32,941 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 13:52:32,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 13:52:32,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 13:52:32,944 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 13:52:32,948 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 13:52:32,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 13:52:32,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 13:52:32,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 13:52:32,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 13:52:32,958 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 13:52:32,960 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 13:52:32,961 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 13:52:32,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 13:52:32,964 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 13:52:32,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 13:52:32,968 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 13:52:32,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 13:52:32,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 13:52:32,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 13:52:32,974 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 13:52:32,974 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 13:52:32,975 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 13:52:32,975 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 13:52:32,975 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 13:52:32,976 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 13:52:32,981 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 13:52:32,981 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 13:52:32,981 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 13:52:32,982 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 13:52:32,982 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 13:52:32,983 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 13:52:32,983 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 13:52:32,983 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 13:52:32,984 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 13:52:32,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 13:52:32,985 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 13:52:33,005 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 13:52:33,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 13:52:33,006 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 13:52:33,006 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 13:52:33,006 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 13:52:33,006 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 13:52:33,007 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 13:52:33,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 13:52:33,007 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 13:52:33,007 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 13:52:33,008 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 13:52:33,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 13:52:33,008 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 13:52:33,008 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 13:52:33,008 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 13:52:33,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 13:52:33,009 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 13:52:33,009 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 13:52:33,009 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 13:52:33,009 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 13:52:33,009 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 13:52:33,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 13:52:33,010 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 13:52:33,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 13:52:33,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:52:33,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 13:52:33,010 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 13:52:33,010 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 13:52:33,010 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 13:52:33,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 13:52:33,011 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 13:52:33,011 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 13:52:33,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 13:52:33,011 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 13:52:33,011 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b98ece0168fde0a9f5db629b0589397995dd8e9526df8a73dd8042a19f16d948 [2021-12-14 13:52:33,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 13:52:33,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 13:52:33,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 13:52:33,159 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 13:52:33,159 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 13:52:33,160 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/discover_list.c [2021-12-14 13:52:33,218 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa25c84ed/0c6fa8ce53a84b05b1bf9a0adac3cfff/FLAG326bd04c3 [2021-12-14 13:52:33,559 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 13:52:33,559 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/discover_list.c [2021-12-14 13:52:33,565 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa25c84ed/0c6fa8ce53a84b05b1bf9a0adac3cfff/FLAG326bd04c3 [2021-12-14 13:52:33,573 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa25c84ed/0c6fa8ce53a84b05b1bf9a0adac3cfff [2021-12-14 13:52:33,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 13:52:33,576 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 13:52:33,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 13:52:33,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 13:52:33,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 13:52:33,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:52:33" (1/1) ... [2021-12-14 13:52:33,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@763ffb43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:52:33, skipping insertion in model container [2021-12-14 13:52:33,581 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:52:33" (1/1) ... [2021-12-14 13:52:33,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 13:52:33,610 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 13:52:33,736 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/discover_list.c[4997,5010] [2021-12-14 13:52:33,795 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:52:33,804 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 13:52:33,817 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/discover_list.c[4997,5010] [2021-12-14 13:52:33,848 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:52:33,863 INFO L208 MainTranslator]: Completed translation [2021-12-14 13:52:33,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:52:33 WrapperNode [2021-12-14 13:52:33,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 13:52:33,866 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 13:52:33,866 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 13:52:33,866 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 13:52:33,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:52:33" (1/1) ... [2021-12-14 13:52:33,894 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:52:33" (1/1) ... [2021-12-14 13:52:33,936 INFO L137 Inliner]: procedures = 36, calls = 627, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 496 [2021-12-14 13:52:33,940 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 13:52:33,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 13:52:33,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 13:52:33,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 13:52:33,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:52:33" (1/1) ... [2021-12-14 13:52:33,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:52:33" (1/1) ... [2021-12-14 13:52:33,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:52:33" (1/1) ... [2021-12-14 13:52:33,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:52:33" (1/1) ... [2021-12-14 13:52:33,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:52:33" (1/1) ... [2021-12-14 13:52:33,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:52:33" (1/1) ... [2021-12-14 13:52:33,970 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:52:33" (1/1) ... [2021-12-14 13:52:33,973 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 13:52:33,973 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 13:52:33,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 13:52:33,973 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 13:52:33,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:52:33" (1/1) ... [2021-12-14 13:52:33,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:52:33,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:52:33,996 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) [2021-12-14 13:52:34,025 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 [2021-12-14 13:52:34,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 13:52:34,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 13:52:34,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 13:52:34,045 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 13:52:34,045 INFO L130 BoogieDeclarations]: Found specification of procedure smp_send_req [2021-12-14 13:52:34,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-14 13:52:34,045 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-14 13:52:34,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 13:52:34,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 13:52:34,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 13:52:34,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 13:52:34,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-14 13:52:34,046 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-14 13:52:34,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 13:52:34,139 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 13:52:34,140 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 13:52:34,451 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 13:52:34,456 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 13:52:34,456 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 13:52:34,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:52:34 BoogieIcfgContainer [2021-12-14 13:52:34,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 13:52:34,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 13:52:34,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 13:52:34,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 13:52:34,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:52:33" (1/3) ... [2021-12-14 13:52:34,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1380c533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:52:34, skipping insertion in model container [2021-12-14 13:52:34,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:52:33" (2/3) ... [2021-12-14 13:52:34,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1380c533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:52:34, skipping insertion in model container [2021-12-14 13:52:34,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:52:34" (3/3) ... [2021-12-14 13:52:34,467 INFO L111 eAbstractionObserver]: Analyzing ICFG discover_list.c [2021-12-14 13:52:34,473 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 13:52:34,473 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 13:52:34,517 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 13:52:34,524 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, 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=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 13:52:34,524 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 13:52:34,543 INFO L276 IsEmpty]: Start isEmpty. Operand has 75 states, 63 states have (on average 1.5396825396825398) internal successors, (97), 64 states have internal predecessors, (97), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-14 13:52:34,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-14 13:52:34,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:52:34,548 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:52:34,549 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:52:34,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:52:34,553 INFO L85 PathProgramCache]: Analyzing trace with hash 611198103, now seen corresponding path program 1 times [2021-12-14 13:52:34,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:52:34,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936781206] [2021-12-14 13:52:34,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:52:34,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:52:34,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:52:34,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 13:52:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:52:34,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 13:52:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:52:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 13:52:34,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:52:34,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936781206] [2021-12-14 13:52:34,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936781206] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:52:34,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:52:34,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 13:52:34,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139769840] [2021-12-14 13:52:34,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:52:34,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 13:52:34,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:52:34,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 13:52:34,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 13:52:34,930 INFO L87 Difference]: Start difference. First operand has 75 states, 63 states have (on average 1.5396825396825398) internal successors, (97), 64 states have internal predecessors, (97), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 13:52:35,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:52:35,096 INFO L93 Difference]: Finished difference Result 149 states and 231 transitions. [2021-12-14 13:52:35,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 13:52:35,098 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2021-12-14 13:52:35,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:52:35,103 INFO L225 Difference]: With dead ends: 149 [2021-12-14 13:52:35,103 INFO L226 Difference]: Without dead ends: 68 [2021-12-14 13:52:35,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-14 13:52:35,107 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 9 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:52:35,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 370 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:52:35,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-14 13:52:35,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2021-12-14 13:52:35,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 53 states have (on average 1.320754716981132) internal successors, (70), 53 states have internal predecessors, (70), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-14 13:52:35,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2021-12-14 13:52:35,133 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 38 [2021-12-14 13:52:35,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:52:35,133 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2021-12-14 13:52:35,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 13:52:35,133 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2021-12-14 13:52:35,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-14 13:52:35,135 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:52:35,135 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:52:35,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 13:52:35,135 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:52:35,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:52:35,136 INFO L85 PathProgramCache]: Analyzing trace with hash 885957717, now seen corresponding path program 1 times [2021-12-14 13:52:35,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:52:35,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598547] [2021-12-14 13:52:35,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:52:35,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:52:35,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:52:35,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 13:52:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:52:35,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 13:52:35,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:52:35,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 13:52:35,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:52:35,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598547] [2021-12-14 13:52:35,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598547] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:52:35,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112789133] [2021-12-14 13:52:35,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:52:35,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:52:35,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:52:35,251 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) [2021-12-14 13:52:35,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 13:52:35,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:52:35,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 13:52:35,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:52:35,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:52:35,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 13:52:35,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112789133] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:52:35,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 13:52:35,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2021-12-14 13:52:35,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541277373] [2021-12-14 13:52:35,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:52:35,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 13:52:35,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:52:35,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 13:52:35,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 13:52:35,675 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 13:52:35,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:52:35,711 INFO L93 Difference]: Finished difference Result 118 states and 160 transitions. [2021-12-14 13:52:35,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 13:52:35,712 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2021-12-14 13:52:35,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:52:35,714 INFO L225 Difference]: With dead ends: 118 [2021-12-14 13:52:35,714 INFO L226 Difference]: Without dead ends: 65 [2021-12-14 13:52:35,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-14 13:52:35,715 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:52:35,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 242 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:52:35,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-14 13:52:35,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-12-14 13:52:35,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 54 states have internal predecessors, (71), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-14 13:52:35,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 87 transitions. [2021-12-14 13:52:35,729 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 87 transitions. Word has length 38 [2021-12-14 13:52:35,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:52:35,730 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 87 transitions. [2021-12-14 13:52:35,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 13:52:35,730 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 87 transitions. [2021-12-14 13:52:35,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-14 13:52:35,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:52:35,731 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:52:35,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 13:52:35,964 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 [2021-12-14 13:52:35,964 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:52:35,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:52:35,965 INFO L85 PathProgramCache]: Analyzing trace with hash 430601657, now seen corresponding path program 1 times [2021-12-14 13:52:35,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:52:35,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984386944] [2021-12-14 13:52:35,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:52:35,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:52:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:52:36,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 13:52:36,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:52:36,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 13:52:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:52:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 13:52:36,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:52:36,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984386944] [2021-12-14 13:52:36,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984386944] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:52:36,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736300507] [2021-12-14 13:52:36,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:52:36,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:52:36,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:52:36,091 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) [2021-12-14 13:52:36,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 13:52:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:52:36,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 13:52:36,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:52:36,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 13:52:36,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:52:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 13:52:36,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736300507] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:52:36,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:52:36,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-12-14 13:52:36,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941115012] [2021-12-14 13:52:36,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:52:36,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 13:52:36,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:52:36,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 13:52:36,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-14 13:52:36,594 INFO L87 Difference]: Start difference. First operand 65 states and 87 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 13:52:36,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:52:36,757 INFO L93 Difference]: Finished difference Result 128 states and 175 transitions. [2021-12-14 13:52:36,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 13:52:36,758 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2021-12-14 13:52:36,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:52:36,758 INFO L225 Difference]: With dead ends: 128 [2021-12-14 13:52:36,759 INFO L226 Difference]: Without dead ends: 74 [2021-12-14 13:52:36,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-12-14 13:52:36,760 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 24 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:52:36,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 330 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:52:36,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-14 13:52:36,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-12-14 13:52:36,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 62 states have (on average 1.3225806451612903) internal successors, (82), 62 states have internal predecessors, (82), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-14 13:52:36,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 98 transitions. [2021-12-14 13:52:36,765 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 98 transitions. Word has length 40 [2021-12-14 13:52:36,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:52:36,765 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 98 transitions. [2021-12-14 13:52:36,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 13:52:36,765 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 98 transitions. [2021-12-14 13:52:36,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-14 13:52:36,766 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:52:36,766 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:52:36,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 13:52:36,983 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 [2021-12-14 13:52:36,983 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:52:36,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:52:36,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1917005995, now seen corresponding path program 2 times [2021-12-14 13:52:36,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:52:36,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861711535] [2021-12-14 13:52:36,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:52:36,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:52:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:52:37,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 13:52:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:52:37,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-14 13:52:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:52:37,110 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-14 13:52:37,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:52:37,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861711535] [2021-12-14 13:52:37,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861711535] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:52:37,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032969557] [2021-12-14 13:52:37,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:52:37,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:52:37,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:52:37,112 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) [2021-12-14 13:52:37,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 13:52:37,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:52:37,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:52:37,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-14 13:52:37,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:52:37,679 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 13:52:37,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:52:37,806 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-14 13:52:37,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032969557] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:52:37,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:52:37,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2021-12-14 13:52:37,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855140132] [2021-12-14 13:52:37,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:52:37,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 13:52:37,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:52:37,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 13:52:37,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-14 13:52:37,809 INFO L87 Difference]: Start difference. First operand 74 states and 98 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 13:52:38,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:52:38,122 INFO L93 Difference]: Finished difference Result 139 states and 185 transitions. [2021-12-14 13:52:38,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 13:52:38,123 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2021-12-14 13:52:38,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:52:38,124 INFO L225 Difference]: With dead ends: 139 [2021-12-14 13:52:38,124 INFO L226 Difference]: Without dead ends: 78 [2021-12-14 13:52:38,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2021-12-14 13:52:38,125 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 26 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:52:38,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 415 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:52:38,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-14 13:52:38,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-12-14 13:52:38,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 66 states have internal predecessors, (84), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-14 13:52:38,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2021-12-14 13:52:38,131 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 44 [2021-12-14 13:52:38,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:52:38,131 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2021-12-14 13:52:38,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 13:52:38,132 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2021-12-14 13:52:38,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-14 13:52:38,132 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:52:38,133 INFO L514 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:52:38,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 13:52:38,343 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 [2021-12-14 13:52:38,343 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:52:38,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:52:38,344 INFO L85 PathProgramCache]: Analyzing trace with hash -2100454571, now seen corresponding path program 3 times [2021-12-14 13:52:38,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:52:38,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581449230] [2021-12-14 13:52:38,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:52:38,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:52:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:52:38,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 13:52:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:52:38,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 13:52:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:52:38,507 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-14 13:52:38,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:52:38,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581449230] [2021-12-14 13:52:38,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581449230] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:52:38,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146444860] [2021-12-14 13:52:38,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 13:52:38,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:52:38,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:52:38,509 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) [2021-12-14 13:52:38,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 13:52:39,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-14 13:52:39,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:52:39,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-14 13:52:39,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:52:39,386 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-14 13:52:39,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:52:39,629 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-14 13:52:39,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146444860] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:52:39,630 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:52:39,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 22 [2021-12-14 13:52:39,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043318013] [2021-12-14 13:52:39,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:52:39,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-14 13:52:39,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:52:39,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-14 13:52:39,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-12-14 13:52:39,631 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 13:52:40,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:52:40,665 INFO L93 Difference]: Finished difference Result 152 states and 204 transitions. [2021-12-14 13:52:40,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-14 13:52:40,666 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 48 [2021-12-14 13:52:40,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:52:40,667 INFO L225 Difference]: With dead ends: 152 [2021-12-14 13:52:40,667 INFO L226 Difference]: Without dead ends: 87 [2021-12-14 13:52:40,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=428, Invalid=1054, Unknown=0, NotChecked=0, Total=1482 [2021-12-14 13:52:40,670 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 52 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 13:52:40,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 706 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 13:52:40,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-14 13:52:40,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-12-14 13:52:40,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 75 states have (on average 1.24) internal successors, (93), 75 states have internal predecessors, (93), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-14 13:52:40,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2021-12-14 13:52:40,701 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 48 [2021-12-14 13:52:40,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:52:40,703 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2021-12-14 13:52:40,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 13:52:40,704 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2021-12-14 13:52:40,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-14 13:52:40,706 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:52:40,707 INFO L514 BasicCegarLoop]: trace histogram [19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:52:40,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 13:52:40,923 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 [2021-12-14 13:52:40,923 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:52:40,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:52:40,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1661068933, now seen corresponding path program 4 times [2021-12-14 13:52:40,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:52:40,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973585924] [2021-12-14 13:52:40,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:52:40,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:52:40,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:52:40,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 13:52:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:52:41,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 13:52:41,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:52:41,125 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-14 13:52:41,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:52:41,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973585924] [2021-12-14 13:52:41,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973585924] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:52:41,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028916671] [2021-12-14 13:52:41,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 13:52:41,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:52:41,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:52:41,127 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) [2021-12-14 13:52:41,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 13:52:41,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 13:52:41,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:52:41,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-14 13:52:41,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:52:41,690 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 107 proven. 28 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-14 13:52:41,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:52:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-14 13:52:42,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028916671] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:52:42,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:52:42,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2021-12-14 13:52:42,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263259218] [2021-12-14 13:52:42,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:52:42,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-14 13:52:42,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:52:42,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-14 13:52:42,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-12-14 13:52:42,119 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 13:52:50,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:52:50,230 INFO L93 Difference]: Finished difference Result 163 states and 211 transitions. [2021-12-14 13:52:50,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-14 13:52:50,231 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-14 13:52:50,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:52:50,231 INFO L225 Difference]: With dead ends: 163 [2021-12-14 13:52:50,231 INFO L226 Difference]: Without dead ends: 96 [2021-12-14 13:52:50,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=679, Invalid=1577, Unknown=0, NotChecked=0, Total=2256 [2021-12-14 13:52:50,233 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 80 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 13:52:50,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 700 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 13:52:50,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-14 13:52:50,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-12-14 13:52:50,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 84 states have internal predecessors, (102), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-14 13:52:50,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2021-12-14 13:52:50,238 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 57 [2021-12-14 13:52:50,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:52:50,238 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2021-12-14 13:52:50,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 13:52:50,238 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2021-12-14 13:52:50,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 13:52:50,239 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:52:50,239 INFO L514 BasicCegarLoop]: trace histogram [28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:52:50,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 13:52:50,439 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 [2021-12-14 13:52:50,440 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:52:50,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:52:50,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1004739755, now seen corresponding path program 5 times [2021-12-14 13:52:50,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:52:50,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292305830] [2021-12-14 13:52:50,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:52:50,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:52:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:52:50,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 13:52:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:52:51,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 13:52:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:52:51,044 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 359 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-14 13:52:51,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:52:51,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292305830] [2021-12-14 13:52:51,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292305830] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:52:51,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037907233] [2021-12-14 13:52:51,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 13:52:51,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:52:51,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:52:51,046 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) [2021-12-14 13:52:51,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process