./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 e19ca921 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-dev-e19ca92 [2021-12-22 10:42:57,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 10:42:57,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 10:42:57,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 10:42:57,173 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 10:42:57,176 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 10:42:57,177 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 10:42:57,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 10:42:57,182 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 10:42:57,186 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 10:42:57,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 10:42:57,188 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 10:42:57,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 10:42:57,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 10:42:57,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 10:42:57,195 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 10:42:57,196 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 10:42:57,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 10:42:57,199 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 10:42:57,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 10:42:57,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 10:42:57,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 10:42:57,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 10:42:57,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 10:42:57,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 10:42:57,217 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 10:42:57,217 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 10:42:57,218 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 10:42:57,219 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 10:42:57,219 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 10:42:57,220 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 10:42:57,221 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 10:42:57,222 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 10:42:57,223 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 10:42:57,224 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 10:42:57,225 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 10:42:57,225 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 10:42:57,226 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 10:42:57,226 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 10:42:57,227 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 10:42:57,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 10:42:57,229 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 10:42:57,261 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 10:42:57,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 10:42:57,262 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 10:42:57,262 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 10:42:57,263 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 10:42:57,263 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 10:42:57,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 10:42:57,264 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 10:42:57,264 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 10:42:57,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 10:42:57,265 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 10:42:57,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 10:42:57,266 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 10:42:57,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 10:42:57,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 10:42:57,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 10:42:57,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 10:42:57,266 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 10:42:57,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 10:42:57,267 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 10:42:57,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 10:42:57,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 10:42:57,267 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 10:42:57,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 10:42:57,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:42:57,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 10:42:57,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 10:42:57,269 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 10:42:57,270 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 10:42:57,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 10:42:57,270 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 10:42:57,270 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 10:42:57,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 10:42:57,271 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 10:42:57,271 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b98ece0168fde0a9f5db629b0589397995dd8e9526df8a73dd8042a19f16d948 [2021-12-22 10:42:57,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 10:42:57,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 10:42:57,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 10:42:57,574 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 10:42:57,575 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 10:42:57,576 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/discover_list.c [2021-12-22 10:42:57,654 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34a5ab681/567e63761cba4f5cbc5330504ea31b7a/FLAG64187793a [2021-12-22 10:42:58,007 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 10:42:58,015 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/discover_list.c [2021-12-22 10:42:58,023 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34a5ab681/567e63761cba4f5cbc5330504ea31b7a/FLAG64187793a [2021-12-22 10:42:58,389 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34a5ab681/567e63761cba4f5cbc5330504ea31b7a [2021-12-22 10:42:58,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 10:42:58,392 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 10:42:58,393 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 10:42:58,393 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 10:42:58,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 10:42:58,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:42:58" (1/1) ... [2021-12-22 10:42:58,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@349042c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:42:58, skipping insertion in model container [2021-12-22 10:42:58,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:42:58" (1/1) ... [2021-12-22 10:42:58,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 10:42:58,434 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 10:42:58,585 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] [2021-12-22 10:42:58,661 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:42:58,672 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 10:42:58,695 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] [2021-12-22 10:42:58,742 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:42:58,766 INFO L208 MainTranslator]: Completed translation [2021-12-22 10:42:58,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:42:58 WrapperNode [2021-12-22 10:42:58,767 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 10:42:58,768 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 10:42:58,769 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 10:42:58,769 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 10:42:58,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:42:58" (1/1) ... [2021-12-22 10:42:58,802 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:42:58" (1/1) ... [2021-12-22 10:42:58,854 INFO L137 Inliner]: procedures = 36, calls = 627, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 496 [2021-12-22 10:42:58,855 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 10:42:58,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 10:42:58,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 10:42:58,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 10:42:58,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:42:58" (1/1) ... [2021-12-22 10:42:58,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:42:58" (1/1) ... [2021-12-22 10:42:58,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:42:58" (1/1) ... [2021-12-22 10:42:58,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:42:58" (1/1) ... [2021-12-22 10:42:58,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:42:58" (1/1) ... [2021-12-22 10:42:58,911 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:42:58" (1/1) ... [2021-12-22 10:42:58,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:42:58" (1/1) ... [2021-12-22 10:42:58,923 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 10:42:58,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 10:42:58,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 10:42:58,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 10:42:58,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:42:58" (1/1) ... [2021-12-22 10:42:58,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:42:58,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:42:58,968 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) [2021-12-22 10:42:58,996 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 [2021-12-22 10:42:59,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 10:42:59,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 10:42:59,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 10:42:59,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 10:42:59,018 INFO L130 BoogieDeclarations]: Found specification of procedure smp_send_req [2021-12-22 10:42:59,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-22 10:42:59,018 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-22 10:42:59,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 10:42:59,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 10:42:59,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 10:42:59,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 10:42:59,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-22 10:42:59,019 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-22 10:42:59,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 10:42:59,147 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 10:42:59,148 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 10:42:59,592 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 10:42:59,603 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 10:42:59,604 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 10:42:59,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:42:59 BoogieIcfgContainer [2021-12-22 10:42:59,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 10:42:59,611 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 10:42:59,612 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 10:42:59,615 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 10:42:59,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:42:58" (1/3) ... [2021-12-22 10:42:59,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d7e2307 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:42:59, skipping insertion in model container [2021-12-22 10:42:59,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:42:58" (2/3) ... [2021-12-22 10:42:59,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d7e2307 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:42:59, skipping insertion in model container [2021-12-22 10:42:59,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:42:59" (3/3) ... [2021-12-22 10:42:59,619 INFO L111 eAbstractionObserver]: Analyzing ICFG discover_list.c [2021-12-22 10:42:59,624 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 10:42:59,624 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 10:42:59,670 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 10:42:59,679 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 [2021-12-22 10:42:59,679 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 10:42:59,700 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) [2021-12-22 10:42:59,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-22 10:42:59,705 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:42:59,705 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] [2021-12-22 10:42:59,706 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:42:59,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:42:59,710 INFO L85 PathProgramCache]: Analyzing trace with hash 611198103, now seen corresponding path program 1 times [2021-12-22 10:42:59,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:42:59,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687507934] [2021-12-22 10:42:59,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:42:59,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:42:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:42:59,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 10:43:00,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:43:00,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 10:43:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:43:00,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 10:43:00,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:43:00,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687507934] [2021-12-22 10:43:00,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687507934] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:43:00,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:43:00,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 10:43:00,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37448438] [2021-12-22 10:43:00,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:43:00,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 10:43:00,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:43:00,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 10:43:00,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 10:43:00,050 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) [2021-12-22 10:43:00,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:43:00,291 INFO L93 Difference]: Finished difference Result 149 states and 231 transitions. [2021-12-22 10:43:00,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 10:43:00,294 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 [2021-12-22 10:43:00,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:43:00,301 INFO L225 Difference]: With dead ends: 149 [2021-12-22 10:43:00,302 INFO L226 Difference]: Without dead ends: 68 [2021-12-22 10:43:00,305 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 [2021-12-22 10:43:00,308 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, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 10:43:00,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 370 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 10:43:00,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-22 10:43:00,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2021-12-22 10:43:00,365 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) [2021-12-22 10:43:00,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2021-12-22 10:43:00,369 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 38 [2021-12-22 10:43:00,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:43:00,369 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2021-12-22 10:43:00,369 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) [2021-12-22 10:43:00,370 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2021-12-22 10:43:00,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-22 10:43:00,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:43:00,385 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] [2021-12-22 10:43:00,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 10:43:00,386 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:43:00,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:43:00,387 INFO L85 PathProgramCache]: Analyzing trace with hash 885957717, now seen corresponding path program 1 times [2021-12-22 10:43:00,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:43:00,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877109605] [2021-12-22 10:43:00,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:43:00,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:43:00,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:43:00,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 10:43:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:43:00,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 10:43:00,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:43:00,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 10:43:00,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:43:00,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877109605] [2021-12-22 10:43:00,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877109605] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:43:00,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669092067] [2021-12-22 10:43:00,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:43:00,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:43:00,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:43:00,680 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) [2021-12-22 10:43:00,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 10:43:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:43:01,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 10:43:01,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:43:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:43:01,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 10:43:01,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669092067] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:43:01,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 10:43:01,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2021-12-22 10:43:01,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829950840] [2021-12-22 10:43:01,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:43:01,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 10:43:01,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:43:01,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 10:43:01,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 10:43:01,201 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) [2021-12-22 10:43:01,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:43:01,254 INFO L93 Difference]: Finished difference Result 118 states and 160 transitions. [2021-12-22 10:43:01,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 10:43:01,255 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 [2021-12-22 10:43:01,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:43:01,257 INFO L225 Difference]: With dead ends: 118 [2021-12-22 10:43:01,258 INFO L226 Difference]: Without dead ends: 65 [2021-12-22 10:43:01,259 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 [2021-12-22 10:43:01,262 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 [2021-12-22 10:43:01,263 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] [2021-12-22 10:43:01,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-22 10:43:01,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-12-22 10:43:01,275 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) [2021-12-22 10:43:01,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 87 transitions. [2021-12-22 10:43:01,280 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 87 transitions. Word has length 38 [2021-12-22 10:43:01,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:43:01,283 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 87 transitions. [2021-12-22 10:43:01,283 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) [2021-12-22 10:43:01,283 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 87 transitions. [2021-12-22 10:43:01,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-22 10:43:01,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:43:01,286 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] [2021-12-22 10:43:01,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 10:43:01,499 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 [2021-12-22 10:43:01,500 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:43:01,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:43:01,500 INFO L85 PathProgramCache]: Analyzing trace with hash 430601657, now seen corresponding path program 1 times [2021-12-22 10:43:01,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:43:01,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62794029] [2021-12-22 10:43:01,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:43:01,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:43:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:43:01,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 10:43:01,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:43:01,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-22 10:43:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:43:01,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:43:01,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:43:01,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62794029] [2021-12-22 10:43:01,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62794029] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:43:01,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841413391] [2021-12-22 10:43:01,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:43:01,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:43:01,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:43:01,651 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) [2021-12-22 10:43:01,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 10:43:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:43:02,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 10:43:02,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:43:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 10:43:02,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:43:02,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:43:02,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841413391] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:43:02,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:43:02,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-12-22 10:43:02,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707504860] [2021-12-22 10:43:02,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:43:02,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 10:43:02,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:43:02,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 10:43:02,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-22 10:43:02,382 INFO L87 Difference]: Start difference. First operand 65 states and 87 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 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) [2021-12-22 10:43:02,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:43:02,715 INFO L93 Difference]: Finished difference Result 128 states and 174 transitions. [2021-12-22 10:43:02,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 10:43:02,717 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 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 40 [2021-12-22 10:43:02,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:43:02,718 INFO L225 Difference]: With dead ends: 128 [2021-12-22 10:43:02,718 INFO L226 Difference]: Without dead ends: 74 [2021-12-22 10:43:02,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-12-22 10:43:02,719 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 18 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 10:43:02,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 340 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 10:43:02,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-22 10:43:02,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-12-22 10:43:02,733 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) [2021-12-22 10:43:02,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 98 transitions. [2021-12-22 10:43:02,738 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 98 transitions. Word has length 40 [2021-12-22 10:43:02,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:43:02,738 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 98 transitions. [2021-12-22 10:43:02,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 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) [2021-12-22 10:43:02,739 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 98 transitions. [2021-12-22 10:43:02,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 10:43:02,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:43:02,742 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] [2021-12-22 10:43:02,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 10:43:02,963 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 [2021-12-22 10:43:02,964 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:43:02,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:43:02,964 INFO L85 PathProgramCache]: Analyzing trace with hash -996113707, now seen corresponding path program 2 times [2021-12-22 10:43:02,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:43:02,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584512925] [2021-12-22 10:43:02,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:43:02,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:43:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:43:03,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 10:43:03,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:43:03,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 10:43:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:43:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 10:43:03,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:43:03,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584512925] [2021-12-22 10:43:03,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584512925] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:43:03,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278592424] [2021-12-22 10:43:03,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 10:43:03,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:43:03,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:43:03,259 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) [2021-12-22 10:43:03,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 10:43:03,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 10:43:03,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:43:03,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 10:43:03,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:43:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 10:43:03,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:43:04,163 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 10:43:04,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278592424] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:43:04,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:43:04,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 15 [2021-12-22 10:43:04,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895826096] [2021-12-22 10:43:04,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:43:04,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 10:43:04,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:43:04,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 10:43:04,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-12-22 10:43:04,166 INFO L87 Difference]: Start difference. First operand 74 states and 98 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 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) [2021-12-22 10:43:04,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:43:04,583 INFO L93 Difference]: Finished difference Result 144 states and 196 transitions. [2021-12-22 10:43:04,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 10:43:04,583 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 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 44 [2021-12-22 10:43:04,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:43:04,584 INFO L225 Difference]: With dead ends: 144 [2021-12-22 10:43:04,584 INFO L226 Difference]: Without dead ends: 81 [2021-12-22 10:43:04,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-12-22 10:43:04,586 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 37 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 10:43:04,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 478 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 10:43:04,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-22 10:43:04,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-12-22 10:43:04,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 69 states have internal predecessors, (87), 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) [2021-12-22 10:43:04,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 103 transitions. [2021-12-22 10:43:04,599 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 103 transitions. Word has length 44 [2021-12-22 10:43:04,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:43:04,599 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 103 transitions. [2021-12-22 10:43:04,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 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) [2021-12-22 10:43:04,599 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 103 transitions. [2021-12-22 10:43:04,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-22 10:43:04,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:43:04,600 INFO L514 BasicCegarLoop]: trace histogram [13, 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] [2021-12-22 10:43:04,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 10:43:04,819 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 [2021-12-22 10:43:04,819 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:43:04,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:43:04,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1168924549, now seen corresponding path program 3 times [2021-12-22 10:43:04,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:43:04,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46137133] [2021-12-22 10:43:04,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:43:04,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:43:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:43:04,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 10:43:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:43:05,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 10:43:05,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:43:05,030 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-22 10:43:05,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:43:05,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46137133] [2021-12-22 10:43:05,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46137133] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:43:05,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745197054] [2021-12-22 10:43:05,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 10:43:05,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:43:05,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:43:05,036 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) [2021-12-22 10:43:05,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 10:43:06,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-22 10:43:06,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:43:06,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-22 10:43:06,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:43:06,879 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 57 proven. 15 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-22 10:43:06,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:43:07,201 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-22 10:43:07,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745197054] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:43:07,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:43:07,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2021-12-22 10:43:07,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511479731] [2021-12-22 10:43:07,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:43:07,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-22 10:43:07,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:43:07,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-22 10:43:07,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2021-12-22 10:43:07,203 INFO L87 Difference]: Start difference. First operand 81 states and 103 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 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) [2021-12-22 10:43:08,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:43:08,256 INFO L93 Difference]: Finished difference Result 151 states and 197 transitions. [2021-12-22 10:43:08,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-22 10:43:08,257 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 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 51 [2021-12-22 10:43:08,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:43:08,258 INFO L225 Difference]: With dead ends: 151 [2021-12-22 10:43:08,258 INFO L226 Difference]: Without dead ends: 88 [2021-12-22 10:43:08,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2021-12-22 10:43:08,259 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 42 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 10:43:08,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 638 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 10:43:08,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-22 10:43:08,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-12-22 10:43:08,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 76 states have (on average 1.236842105263158) internal successors, (94), 76 states have internal predecessors, (94), 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) [2021-12-22 10:43:08,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 110 transitions. [2021-12-22 10:43:08,275 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 110 transitions. Word has length 51 [2021-12-22 10:43:08,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:43:08,277 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 110 transitions. [2021-12-22 10:43:08,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 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) [2021-12-22 10:43:08,278 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 110 transitions. [2021-12-22 10:43:08,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-22 10:43:08,280 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:43:08,280 INFO L514 BasicCegarLoop]: trace histogram [20, 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] [2021-12-22 10:43:08,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 10:43:08,487 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 [2021-12-22 10:43:08,487 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:43:08,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:43:08,488 INFO L85 PathProgramCache]: Analyzing trace with hash -900558251, now seen corresponding path program 4 times [2021-12-22 10:43:08,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:43:08,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494792100] [2021-12-22 10:43:08,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:43:08,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:43:08,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:43:08,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 10:43:08,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:43:08,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 10:43:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:43:08,932 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 197 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-22 10:43:08,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:43:08,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494792100] [2021-12-22 10:43:08,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494792100] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:43:08,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384307694] [2021-12-22 10:43:08,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 10:43:08,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:43:08,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:43:08,936 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) [2021-12-22 10:43:08,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 10:43:09,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 10:43:09,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:43:09,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-22 10:43:09,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:43:09,785 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 3 proven. 218 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 10:43:09,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:43:10,484 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 119 proven. 36 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-22 10:43:10,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384307694] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:43:10,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:43:10,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 12] total 40 [2021-12-22 10:43:10,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88133914] [2021-12-22 10:43:10,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:43:10,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-22 10:43:10,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:43:10,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-22 10:43:10,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1209, Unknown=0, NotChecked=0, Total=1560 [2021-12-22 10:43:10,488 INFO L87 Difference]: Start difference. First operand 88 states and 110 transitions. Second operand has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 2 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-22 10:43:18,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:43:18,309 INFO L93 Difference]: Finished difference Result 174 states and 235 transitions. [2021-12-22 10:43:18,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-22 10:43:18,310 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 2 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 58 [2021-12-22 10:43:18,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:43:18,311 INFO L225 Difference]: With dead ends: 174 [2021-12-22 10:43:18,311 INFO L226 Difference]: Without dead ends: 103 [2021-12-22 10:43:18,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1370, Invalid=5436, Unknown=0, NotChecked=0, Total=6806 [2021-12-22 10:43:18,314 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 107 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1105 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 10:43:18,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 1105 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 10:43:18,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-22 10:43:18,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-12-22 10:43:18,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 91 states have internal predecessors, (109), 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) [2021-12-22 10:43:18,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 125 transitions. [2021-12-22 10:43:18,328 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 125 transitions. Word has length 58 [2021-12-22 10:43:18,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:43:18,328 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 125 transitions. [2021-12-22 10:43:18,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 2 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-22 10:43:18,329 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 125 transitions. [2021-12-22 10:43:18,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-22 10:43:18,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:43:18,330 INFO L514 BasicCegarLoop]: trace histogram [35, 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] [2021-12-22 10:43:18,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 10:43:18,543 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 [2021-12-22 10:43:18,544 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:43:18,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:43:18,544 INFO L85 PathProgramCache]: Analyzing trace with hash 675730693, now seen corresponding path program 5 times [2021-12-22 10:43:18,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:43:18,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008865877] [2021-12-22 10:43:18,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:43:18,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:43:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:43:18,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 10:43:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:43:19,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-22 10:43:19,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:43:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 0 proven. 415 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2021-12-22 10:43:19,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:43:19,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008865877] [2021-12-22 10:43:19,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008865877] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:43:19,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725385113] [2021-12-22 10:43:19,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 10:43:19,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:43:19,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:43:19,052 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) [2021-12-22 10:43:19,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process