./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/lcm2_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/nla-digbench-scaling/lcm2_valuebound2.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 298a2fa3454ac9d826b4a2fcda5c49527e83e26e7b8633f156b47d33577c1902 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 13:37:47,476 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 13:37:47,481 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 13:37:47,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 13:37:47,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 13:37:47,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 13:37:47,542 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 13:37:47,544 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 13:37:47,545 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 13:37:47,548 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 13:37:47,549 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 13:37:47,550 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 13:37:47,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 13:37:47,552 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 13:37:47,553 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 13:37:47,557 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 13:37:47,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 13:37:47,559 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 13:37:47,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 13:37:47,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 13:37:47,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 13:37:47,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 13:37:47,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 13:37:47,567 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 13:37:47,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 13:37:47,572 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 13:37:47,572 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 13:37:47,573 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 13:37:47,573 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 13:37:47,574 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 13:37:47,574 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 13:37:47,575 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 13:37:47,576 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 13:37:47,576 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 13:37:47,577 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 13:37:47,578 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 13:37:47,578 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 13:37:47,578 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 13:37:47,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 13:37:47,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 13:37:47,579 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 13:37:47,581 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 13:37:47,602 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 13:37:47,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 13:37:47,603 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 13:37:47,603 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 13:37:47,604 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 13:37:47,604 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 13:37:47,605 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 13:37:47,605 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 13:37:47,605 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 13:37:47,605 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 13:37:47,606 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 13:37:47,606 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 13:37:47,606 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 13:37:47,606 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 13:37:47,606 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 13:37:47,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 13:37:47,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 13:37:47,607 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 13:37:47,607 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 13:37:47,607 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 13:37:47,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 13:37:47,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 13:37:47,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 13:37:47,607 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 13:37:47,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 13:37:47,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 13:37:47,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 13:37:47,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 13:37:47,609 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 13:37:47,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 13:37:47,609 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 13:37:47,609 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 13:37:47,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 13:37:47,610 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 13:37:47,610 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 298a2fa3454ac9d826b4a2fcda5c49527e83e26e7b8633f156b47d33577c1902 [2021-12-17 13:37:47,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 13:37:47,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 13:37:47,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 13:37:47,809 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 13:37:47,810 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 13:37:47,811 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/lcm2_valuebound2.c [2021-12-17 13:37:47,861 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e49b4eee/568c1fb77b164f7f86dd61fc09e42f6a/FLAGa86079a30 [2021-12-17 13:37:48,203 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 13:37:48,203 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/lcm2_valuebound2.c [2021-12-17 13:37:48,211 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e49b4eee/568c1fb77b164f7f86dd61fc09e42f6a/FLAGa86079a30 [2021-12-17 13:37:48,221 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e49b4eee/568c1fb77b164f7f86dd61fc09e42f6a [2021-12-17 13:37:48,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 13:37:48,224 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 13:37:48,226 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 13:37:48,226 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 13:37:48,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 13:37:48,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 01:37:48" (1/1) ... [2021-12-17 13:37:48,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75616552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:37:48, skipping insertion in model container [2021-12-17 13:37:48,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 01:37:48" (1/1) ... [2021-12-17 13:37:48,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 13:37:48,243 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 13:37:48,376 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/nla-digbench-scaling/lcm2_valuebound2.c[537,550] [2021-12-17 13:37:48,394 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 13:37:48,399 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 13:37:48,410 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/nla-digbench-scaling/lcm2_valuebound2.c[537,550] [2021-12-17 13:37:48,423 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 13:37:48,431 INFO L208 MainTranslator]: Completed translation [2021-12-17 13:37:48,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:37:48 WrapperNode [2021-12-17 13:37:48,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 13:37:48,434 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 13:37:48,434 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 13:37:48,434 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 13:37:48,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:37:48" (1/1) ... [2021-12-17 13:37:48,444 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:37:48" (1/1) ... [2021-12-17 13:37:48,460 INFO L137 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 52 [2021-12-17 13:37:48,461 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 13:37:48,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 13:37:48,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 13:37:48,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 13:37:48,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:37:48" (1/1) ... [2021-12-17 13:37:48,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:37:48" (1/1) ... [2021-12-17 13:37:48,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:37:48" (1/1) ... [2021-12-17 13:37:48,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:37:48" (1/1) ... [2021-12-17 13:37:48,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:37:48" (1/1) ... [2021-12-17 13:37:48,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:37:48" (1/1) ... [2021-12-17 13:37:48,488 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:37:48" (1/1) ... [2021-12-17 13:37:48,489 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 13:37:48,490 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 13:37:48,490 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 13:37:48,491 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 13:37:48,491 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:37:48" (1/1) ... [2021-12-17 13:37:48,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 13:37:48,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:37:48,512 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) [2021-12-17 13:37:48,530 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 [2021-12-17 13:37:48,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 13:37:48,538 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 13:37:48,538 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 13:37:48,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 13:37:48,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 13:37:48,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 13:37:48,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 13:37:48,539 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 13:37:48,585 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 13:37:48,587 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 13:37:48,663 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 13:37:48,667 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 13:37:48,667 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 13:37:48,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 01:37:48 BoogieIcfgContainer [2021-12-17 13:37:48,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 13:37:48,670 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 13:37:48,670 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 13:37:48,672 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 13:37:48,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 01:37:48" (1/3) ... [2021-12-17 13:37:48,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a9d5b26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 01:37:48, skipping insertion in model container [2021-12-17 13:37:48,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:37:48" (2/3) ... [2021-12-17 13:37:48,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a9d5b26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 01:37:48, skipping insertion in model container [2021-12-17 13:37:48,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 01:37:48" (3/3) ... [2021-12-17 13:37:48,674 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm2_valuebound2.c [2021-12-17 13:37:48,677 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 13:37:48,677 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 13:37:48,705 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 13:37:48,710 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 [2021-12-17 13:37:48,710 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 13:37:48,719 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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) [2021-12-17 13:37:48,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 13:37:48,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:37:48,723 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 13:37:48,724 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:37:48,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:37:48,727 INFO L85 PathProgramCache]: Analyzing trace with hash 902207739, now seen corresponding path program 1 times [2021-12-17 13:37:48,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:37:48,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684803822] [2021-12-17 13:37:48,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:37:48,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:37:48,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 13:37:48,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 13:37:48,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 13:37:48,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 13:37:48,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 13:37:48,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 13:37:48,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 13:37:48,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 13:37:48,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 13:37:48,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 13:37:48,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 13:37:48,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 13:37:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 13:37:48,910 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-17 13:37:48,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 13:37:48,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684803822] [2021-12-17 13:37:48,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684803822] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 13:37:48,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 13:37:48,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 13:37:48,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177118658] [2021-12-17 13:37:48,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 13:37:48,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 13:37:48,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 13:37:48,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 13:37:48,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 13:37:48,942 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 13:37:48,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:37:48,959 INFO L93 Difference]: Finished difference Result 55 states and 84 transitions. [2021-12-17 13:37:48,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 13:37:48,962 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2021-12-17 13:37:48,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:37:48,969 INFO L225 Difference]: With dead ends: 55 [2021-12-17 13:37:48,969 INFO L226 Difference]: Without dead ends: 25 [2021-12-17 13:37:48,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 13:37:48,975 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 13:37:48,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 13:37:48,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-17 13:37:48,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-12-17 13:37:48,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 13:37:48,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2021-12-17 13:37:48,998 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 39 [2021-12-17 13:37:48,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:37:48,998 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2021-12-17 13:37:48,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 13:37:48,999 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2021-12-17 13:37:49,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 13:37:49,000 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:37:49,000 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 13:37:49,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 13:37:49,001 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:37:49,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:37:49,001 INFO L85 PathProgramCache]: Analyzing trace with hash -722599373, now seen corresponding path program 1 times [2021-12-17 13:37:49,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:37:49,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315094330] [2021-12-17 13:37:49,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:37:49,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:37:49,018 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 13:37:49,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105651467] [2021-12-17 13:37:49,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:37:49,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:37:49,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:37:49,020 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) [2021-12-17 13:37:49,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 13:37:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 13:37:49,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 13:37:49,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:37:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-17 13:37:49,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 13:37:49,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 13:37:49,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315094330] [2021-12-17 13:37:49,407 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 13:37:49,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105651467] [2021-12-17 13:37:49,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105651467] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 13:37:49,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 13:37:49,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 13:37:49,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526990168] [2021-12-17 13:37:49,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 13:37:49,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 13:37:49,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 13:37:49,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 13:37:49,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 13:37:49,417 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-17 13:37:49,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:37:49,473 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-12-17 13:37:49,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 13:37:49,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2021-12-17 13:37:49,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:37:49,480 INFO L225 Difference]: With dead ends: 36 [2021-12-17 13:37:49,480 INFO L226 Difference]: Without dead ends: 33 [2021-12-17 13:37:49,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 13:37:49,482 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 13:37:49,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 99 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 13:37:49,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-17 13:37:49,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-12-17 13:37:49,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 13:37:49,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-12-17 13:37:49,489 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 39 [2021-12-17 13:37:49,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:37:49,490 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-12-17 13:37:49,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-17 13:37:49,490 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-12-17 13:37:49,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-17 13:37:49,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:37:49,493 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-12-17 13:37:49,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 13:37:49,697 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 [2021-12-17 13:37:49,697 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:37:49,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:37:49,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1459116230, now seen corresponding path program 1 times [2021-12-17 13:37:49,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:37:49,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51545607] [2021-12-17 13:37:49,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:37:49,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:37:49,724 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 13:37:49,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420516668] [2021-12-17 13:37:49,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:37:49,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:37:49,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:37:49,726 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) [2021-12-17 13:37:49,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process Killed by 15