./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf 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/prod4br-ll_unwindbound5.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 6af5782e9faaff387acb023fd1478fd245d68d47 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 14:31:36,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 14:31:36,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 14:31:36,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 14:31:36,460 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 14:31:36,463 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 14:31:36,464 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 14:31:36,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 14:31:36,472 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 14:31:36,476 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 14:31:36,477 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 14:31:36,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 14:31:36,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 14:31:36,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 14:31:36,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 14:31:36,488 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 14:31:36,489 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 14:31:36,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 14:31:36,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 14:31:36,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 14:31:36,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 14:31:36,502 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 14:31:36,504 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 14:31:36,505 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 14:31:36,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 14:31:36,512 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 14:31:36,512 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 14:31:36,514 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 14:31:36,514 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 14:31:36,515 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 14:31:36,515 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 14:31:36,516 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 14:31:36,517 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 14:31:36,518 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 14:31:36,519 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 14:31:36,519 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 14:31:36,520 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 14:31:36,520 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 14:31:36,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 14:31:36,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 14:31:36,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 14:31:36,526 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 14:31:36,574 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 14:31:36,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 14:31:36,575 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 14:31:36,575 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 14:31:36,577 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 14:31:36,577 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 14:31:36,578 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 14:31:36,578 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 14:31:36,578 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 14:31:36,578 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 14:31:36,579 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 14:31:36,579 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 14:31:36,579 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 14:31:36,579 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 14:31:36,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 14:31:36,580 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 14:31:36,580 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 14:31:36,580 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 14:31:36,580 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 14:31:36,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 14:31:36,581 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 14:31:36,581 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 14:31:36,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 14:31:36,591 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 14:31:36,591 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 14:31:36,591 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 14:31:36,592 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 14:31:36,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 14:31:36,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 14:31:36,592 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 14:31:36,592 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6af5782e9faaff387acb023fd1478fd245d68d47 [2021-08-29 14:31:36,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 14:31:36,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 14:31:36,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 14:31:36,913 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 14:31:36,914 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 14:31:36,915 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound5.c [2021-08-29 14:31:36,982 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b736bade5/14f84ce39350461098df4b3c89ab0a5f/FLAG00f674b99 [2021-08-29 14:31:37,342 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 14:31:37,342 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound5.c [2021-08-29 14:31:37,348 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b736bade5/14f84ce39350461098df4b3c89ab0a5f/FLAG00f674b99 [2021-08-29 14:31:37,359 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b736bade5/14f84ce39350461098df4b3c89ab0a5f [2021-08-29 14:31:37,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 14:31:37,363 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 14:31:37,365 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 14:31:37,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 14:31:37,368 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 14:31:37,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 02:31:37" (1/1) ... [2021-08-29 14:31:37,369 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42bbb2b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:31:37, skipping insertion in model container [2021-08-29 14:31:37,369 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 02:31:37" (1/1) ... [2021-08-29 14:31:37,375 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 14:31:37,386 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 14:31:37,530 WARN L228 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/prod4br-ll_unwindbound5.c[524,537] [2021-08-29 14:31:37,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 14:31:37,561 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 14:31:37,574 WARN L228 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/prod4br-ll_unwindbound5.c[524,537] [2021-08-29 14:31:37,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 14:31:37,632 INFO L208 MainTranslator]: Completed translation [2021-08-29 14:31:37,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:31:37 WrapperNode [2021-08-29 14:31:37,634 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 14:31:37,636 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 14:31:37,636 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 14:31:37,636 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 14:31:37,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:31:37" (1/1) ... [2021-08-29 14:31:37,657 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:31:37" (1/1) ... [2021-08-29 14:31:37,683 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 14:31:37,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 14:31:37,684 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 14:31:37,684 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 14:31:37,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:31:37" (1/1) ... [2021-08-29 14:31:37,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:31:37" (1/1) ... [2021-08-29 14:31:37,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:31:37" (1/1) ... [2021-08-29 14:31:37,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:31:37" (1/1) ... [2021-08-29 14:31:37,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:31:37" (1/1) ... [2021-08-29 14:31:37,715 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:31:37" (1/1) ... [2021-08-29 14:31:37,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:31:37" (1/1) ... [2021-08-29 14:31:37,727 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 14:31:37,728 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 14:31:37,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 14:31:37,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 14:31:37,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:31:37" (1/1) ... [2021-08-29 14:31:37,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 14:31:37,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:31:37,762 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) [2021-08-29 14:31:37,790 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 [2021-08-29 14:31:37,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 14:31:37,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 14:31:37,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 14:31:37,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 14:31:37,992 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 14:31:37,993 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-08-29 14:31:37,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:31:37 BoogieIcfgContainer [2021-08-29 14:31:37,994 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 14:31:37,996 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 14:31:37,996 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 14:31:37,999 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 14:31:37,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 02:31:37" (1/3) ... [2021-08-29 14:31:38,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21723c47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 02:31:38, skipping insertion in model container [2021-08-29 14:31:38,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:31:37" (2/3) ... [2021-08-29 14:31:38,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21723c47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 02:31:38, skipping insertion in model container [2021-08-29 14:31:38,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:31:37" (3/3) ... [2021-08-29 14:31:38,002 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound5.c [2021-08-29 14:31:38,009 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 14:31:38,010 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-08-29 14:31:38,060 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 14:31:38,068 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-29 14:31:38,069 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-29 14:31:38,083 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 21 states have (on average 1.619047619047619) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:38,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-29 14:31:38,090 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:31:38,091 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:31:38,092 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:31:38,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:31:38,097 INFO L82 PathProgramCache]: Analyzing trace with hash 120613195, now seen corresponding path program 1 times [2021-08-29 14:31:38,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:31:38,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889022179] [2021-08-29 14:31:38,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:31:38,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:31:38,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:31:38,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:31:38,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:31:38,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889022179] [2021-08-29 14:31:38,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889022179] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:31:38,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:31:38,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 14:31:38,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145983608] [2021-08-29 14:31:38,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 14:31:38,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:31:38,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 14:31:38,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 14:31:38,259 INFO L87 Difference]: Start difference. First operand has 25 states, 21 states have (on average 1.619047619047619) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:38,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:31:38,330 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2021-08-29 14:31:38,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 14:31:38,332 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-08-29 14:31:38,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:31:38,347 INFO L225 Difference]: With dead ends: 47 [2021-08-29 14:31:38,347 INFO L226 Difference]: Without dead ends: 21 [2021-08-29 14:31:38,349 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.04ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 14:31:38,352 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.32ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.77ms IncrementalHoareTripleChecker+Time [2021-08-29 14:31:38,353 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 29 Unknown, 0 Unchecked, 0.32ms Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 56.77ms Time] [2021-08-29 14:31:38,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-29 14:31:38,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-08-29 14:31:38,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:38,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-08-29 14:31:38,414 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 8 [2021-08-29 14:31:38,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:31:38,423 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-08-29 14:31:38,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:38,423 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-08-29 14:31:38,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-29 14:31:38,424 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:31:38,424 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:31:38,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 14:31:38,425 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:31:38,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:31:38,425 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-08-29 14:31:38,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:31:38,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801287541] [2021-08-29 14:31:38,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:31:38,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:31:38,447 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:31:38,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1116391452] [2021-08-29 14:31:38,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:31:38,448 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:31:38,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:31:38,450 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) [2021-08-29 14:31:38,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 14:31:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:31:38,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-29 14:31:38,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:31:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:31:38,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 14:31:38,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:31:38,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801287541] [2021-08-29 14:31:38,696 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:31:38,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116391452] [2021-08-29 14:31:38,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116391452] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:31:38,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:31:38,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 14:31:38,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387673353] [2021-08-29 14:31:38,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 14:31:38,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:31:38,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 14:31:38,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 14:31:38,699 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:38,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:31:38,820 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-08-29 14:31:38,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 14:31:38,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-08-29 14:31:38,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:31:38,822 INFO L225 Difference]: With dead ends: 42 [2021-08-29 14:31:38,822 INFO L226 Difference]: Without dead ends: 40 [2021-08-29 14:31:38,822 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.07ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-29 14:31:38,823 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.49ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 98.55ms IncrementalHoareTripleChecker+Time [2021-08-29 14:31:38,824 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 0 Invalid, 83 Unknown, 0 Unchecked, 1.49ms Time], IncrementalHoareTripleChecker [4 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 98.55ms Time] [2021-08-29 14:31:38,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-29 14:31:38,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 24. [2021-08-29 14:31:38,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.380952380952381) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:38,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-08-29 14:31:38,829 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 8 [2021-08-29 14:31:38,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:31:38,829 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-08-29 14:31:38,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:38,830 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-08-29 14:31:38,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-29 14:31:38,830 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:31:38,830 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:31:38,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-29 14:31:39,031 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 [2021-08-29 14:31:39,031 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:31:39,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:31:39,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1182850160, now seen corresponding path program 1 times [2021-08-29 14:31:39,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:31:39,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492837109] [2021-08-29 14:31:39,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:31:39,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:31:39,044 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:31:39,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [833986787] [2021-08-29 14:31:39,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:31:39,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:31:39,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:31:39,046 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) [2021-08-29 14:31:39,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 14:31:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:31:39,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-29 14:31:39,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:31:39,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:31:39,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 14:31:39,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:31:39,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492837109] [2021-08-29 14:31:39,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:31:39,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833986787] [2021-08-29 14:31:39,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833986787] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:31:39,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:31:39,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 14:31:39,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946103758] [2021-08-29 14:31:39,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 14:31:39,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:31:39,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 14:31:39,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 14:31:39,128 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:39,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:31:39,188 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-08-29 14:31:39,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 14:31:39,189 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-08-29 14:31:39,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:31:39,191 INFO L225 Difference]: With dead ends: 32 [2021-08-29 14:31:39,191 INFO L226 Difference]: Without dead ends: 24 [2021-08-29 14:31:39,192 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.68ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 14:31:39,195 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.15ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.36ms IncrementalHoareTripleChecker+Time [2021-08-29 14:31:39,197 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 71 Unknown, 0 Unchecked, 1.15ms Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 49.36ms Time] [2021-08-29 14:31:39,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-29 14:31:39,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-29 14:31:39,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:39,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-08-29 14:31:39,212 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2021-08-29 14:31:39,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:31:39,213 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-08-29 14:31:39,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:39,213 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-08-29 14:31:39,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-29 14:31:39,214 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:31:39,215 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:31:39,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-29 14:31:39,439 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 [2021-08-29 14:31:39,439 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:31:39,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:31:39,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1415754199, now seen corresponding path program 1 times [2021-08-29 14:31:39,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:31:39,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918631811] [2021-08-29 14:31:39,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:31:39,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:31:39,455 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:31:39,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560451314] [2021-08-29 14:31:39,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:31:39,460 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:31:39,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:31:39,461 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) [2021-08-29 14:31:39,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-29 14:31:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:31:39,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-29 14:31:39,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:31:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:31:39,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 14:31:39,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:31:39,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918631811] [2021-08-29 14:31:39,902 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:31:39,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560451314] [2021-08-29 14:31:39,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560451314] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:31:39,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:31:39,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-29 14:31:39,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950670131] [2021-08-29 14:31:39,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-29 14:31:39,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:31:39,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-29 14:31:39,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-29 14:31:39,905 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:41,558 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 14:31:41,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:31:41,655 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-08-29 14:31:41,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-29 14:31:41,656 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-29 14:31:41,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:31:41,657 INFO L225 Difference]: With dead ends: 60 [2021-08-29 14:31:41,657 INFO L226 Difference]: Without dead ends: 58 [2021-08-29 14:31:41,657 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 298.74ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-08-29 14:31:41,658 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 49 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1520.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.63ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 1553.38ms IncrementalHoareTripleChecker+Time [2021-08-29 14:31:41,658 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 0 Invalid, 194 Unknown, 0 Unchecked, 2.63ms Time], IncrementalHoareTripleChecker [8 Valid, 167 Invalid, 0 Unknown, 19 Unchecked, 1553.38ms Time] [2021-08-29 14:31:41,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-29 14:31:41,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 32. [2021-08-29 14:31:41,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:41,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-08-29 14:31:41,663 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 11 [2021-08-29 14:31:41,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:31:41,663 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-08-29 14:31:41,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:41,664 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-08-29 14:31:41,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-29 14:31:41,664 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:31:41,664 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:31:41,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-29 14:31:41,880 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 [2021-08-29 14:31:41,881 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:31:41,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:31:41,882 INFO L82 PathProgramCache]: Analyzing trace with hash 965004492, now seen corresponding path program 1 times [2021-08-29 14:31:41,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:31:41,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470377999] [2021-08-29 14:31:41,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:31:41,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:31:41,892 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:31:41,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [590963918] [2021-08-29 14:31:41,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:31:41,892 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:31:41,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:31:41,896 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) [2021-08-29 14:31:41,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-29 14:31:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:31:41,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-29 14:31:41,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:31:42,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:31:42,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 14:31:42,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:31:42,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470377999] [2021-08-29 14:31:42,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:31:42,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590963918] [2021-08-29 14:31:42,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590963918] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:31:42,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:31:42,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-29 14:31:42,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346419752] [2021-08-29 14:31:42,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-29 14:31:42,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:31:42,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-29 14:31:42,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-29 14:31:42,033 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:42,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:31:42,191 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2021-08-29 14:31:42,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-29 14:31:42,191 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-29 14:31:42,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:31:42,192 INFO L225 Difference]: With dead ends: 57 [2021-08-29 14:31:42,192 INFO L226 Difference]: Without dead ends: 51 [2021-08-29 14:31:42,193 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 99.24ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-29 14:31:42,193 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 107 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.37ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.63ms IncrementalHoareTripleChecker+Time [2021-08-29 14:31:42,194 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 0 Invalid, 113 Unknown, 0 Unchecked, 1.37ms Time], IncrementalHoareTripleChecker [7 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 77.63ms Time] [2021-08-29 14:31:42,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-29 14:31:42,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2021-08-29 14:31:42,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.457142857142857) internal successors, (51), 37 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:42,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2021-08-29 14:31:42,199 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 13 [2021-08-29 14:31:42,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:31:42,200 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2021-08-29 14:31:42,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:42,200 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2021-08-29 14:31:42,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-29 14:31:42,201 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:31:42,201 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:31:42,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-29 14:31:42,420 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 [2021-08-29 14:31:42,421 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:31:42,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:31:42,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1005087291, now seen corresponding path program 1 times [2021-08-29 14:31:42,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:31:42,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043899174] [2021-08-29 14:31:42,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:31:42,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:31:42,431 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:31:42,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925658962] [2021-08-29 14:31:42,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:31:42,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:31:42,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:31:42,432 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) [2021-08-29 14:31:42,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-29 14:31:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:31:42,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-29 14:31:42,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:31:46,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:31:46,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 14:31:47,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:31:47,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:31:47,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043899174] [2021-08-29 14:31:47,347 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:31:47,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925658962] [2021-08-29 14:31:47,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925658962] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 14:31:47,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 14:31:47,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-29 14:31:47,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278193170] [2021-08-29 14:31:47,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-29 14:31:47,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:31:47,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-29 14:31:47,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-08-29 14:31:47,354 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:49,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:31:49,890 INFO L93 Difference]: Finished difference Result 76 states and 108 transitions. [2021-08-29 14:31:49,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-29 14:31:49,891 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-29 14:31:49,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:31:49,892 INFO L225 Difference]: With dead ends: 76 [2021-08-29 14:31:49,892 INFO L226 Difference]: Without dead ends: 74 [2021-08-29 14:31:49,892 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1693.66ms TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2021-08-29 14:31:49,893 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 191 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1410.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.01ms SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1448.31ms IncrementalHoareTripleChecker+Time [2021-08-29 14:31:49,893 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 0 Invalid, 285 Unknown, 0 Unchecked, 4.01ms Time], IncrementalHoareTripleChecker [118 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 1448.31ms Time] [2021-08-29 14:31:49,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-29 14:31:49,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 35. [2021-08-29 14:31:49,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.393939393939394) internal successors, (46), 34 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:49,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-08-29 14:31:49,899 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 13 [2021-08-29 14:31:49,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:31:49,899 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-08-29 14:31:49,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:49,899 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-08-29 14:31:49,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-29 14:31:49,900 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:31:49,900 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:31:49,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-08-29 14:31:50,100 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 [2021-08-29 14:31:50,101 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:31:50,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:31:50,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1092907201, now seen corresponding path program 1 times [2021-08-29 14:31:50,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:31:50,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967712027] [2021-08-29 14:31:50,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:31:50,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:31:50,115 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:31:50,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607024026] [2021-08-29 14:31:50,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:31:50,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:31:50,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:31:50,118 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) [2021-08-29 14:31:50,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-29 14:31:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:31:50,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-29 14:31:50,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:31:50,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:31:50,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 14:31:50,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:31:50,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:31:50,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967712027] [2021-08-29 14:31:50,246 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:31:50,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607024026] [2021-08-29 14:31:50,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607024026] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 14:31:50,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 14:31:50,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-08-29 14:31:50,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589660134] [2021-08-29 14:31:50,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-29 14:31:50,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:31:50,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-29 14:31:50,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-29 14:31:50,248 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:50,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:31:50,388 INFO L93 Difference]: Finished difference Result 112 states and 150 transitions. [2021-08-29 14:31:50,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-29 14:31:50,389 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-29 14:31:50,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:31:50,389 INFO L225 Difference]: With dead ends: 112 [2021-08-29 14:31:50,389 INFO L226 Difference]: Without dead ends: 104 [2021-08-29 14:31:50,390 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 38.27ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-29 14:31:50,390 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.96ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 105.25ms IncrementalHoareTripleChecker+Time [2021-08-29 14:31:50,391 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 0 Invalid, 148 Unknown, 0 Unchecked, 0.96ms Time], IncrementalHoareTripleChecker [6 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 105.25ms Time] [2021-08-29 14:31:50,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-29 14:31:50,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-08-29 14:31:50,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 82 states have (on average 1.4146341463414633) internal successors, (116), 83 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:50,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 116 transitions. [2021-08-29 14:31:50,403 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 116 transitions. Word has length 14 [2021-08-29 14:31:50,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:31:50,403 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 116 transitions. [2021-08-29 14:31:50,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:50,403 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 116 transitions. [2021-08-29 14:31:50,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 14:31:50,404 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:31:50,404 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:31:50,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-29 14:31:50,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:31:50,618 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:31:50,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:31:50,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1951591878, now seen corresponding path program 1 times [2021-08-29 14:31:50,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:31:50,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000489330] [2021-08-29 14:31:50,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:31:50,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:31:50,625 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:31:50,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [260843792] [2021-08-29 14:31:50,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:31:50,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:31:50,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:31:50,627 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 14:31:50,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-29 14:31:50,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:31:50,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-29 14:31:50,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:31:50,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:31:50,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 14:31:50,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:31:50,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000489330] [2021-08-29 14:31:50,776 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:31:50,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260843792] [2021-08-29 14:31:50,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260843792] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:31:50,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:31:50,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-29 14:31:50,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838452499] [2021-08-29 14:31:50,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 14:31:50,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:31:50,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 14:31:50,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-29 14:31:50,777 INFO L87 Difference]: Start difference. First operand 84 states and 116 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:50,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:31:50,896 INFO L93 Difference]: Finished difference Result 117 states and 152 transitions. [2021-08-29 14:31:50,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 14:31:50,896 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-29 14:31:50,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:31:50,897 INFO L225 Difference]: With dead ends: 117 [2021-08-29 14:31:50,897 INFO L226 Difference]: Without dead ends: 113 [2021-08-29 14:31:50,898 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 59.27ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-29 14:31:50,898 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 77 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.78ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 69.51ms IncrementalHoareTripleChecker+Time [2021-08-29 14:31:50,898 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 0 Invalid, 104 Unknown, 0 Unchecked, 0.78ms Time], IncrementalHoareTripleChecker [10 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 69.51ms Time] [2021-08-29 14:31:50,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-08-29 14:31:50,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 94. [2021-08-29 14:31:50,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 92 states have (on average 1.3695652173913044) internal successors, (126), 93 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:50,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2021-08-29 14:31:50,910 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 126 transitions. Word has length 16 [2021-08-29 14:31:50,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:31:50,910 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 126 transitions. [2021-08-29 14:31:50,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:50,910 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 126 transitions. [2021-08-29 14:31:50,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-29 14:31:50,911 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:31:50,911 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:31:50,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-29 14:31:51,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:31:51,131 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:31:51,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:31:51,132 INFO L82 PathProgramCache]: Analyzing trace with hash 38054995, now seen corresponding path program 1 times [2021-08-29 14:31:51,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:31:51,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204016883] [2021-08-29 14:31:51,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:31:51,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:31:51,140 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:31:51,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223796754] [2021-08-29 14:31:51,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:31:51,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:31:51,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:31:51,141 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 14:31:51,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-29 14:31:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:31:51,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-29 14:31:51,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:31:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 14:31:51,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 14:31:51,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:31:51,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204016883] [2021-08-29 14:31:51,356 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:31:51,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223796754] [2021-08-29 14:31:51,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223796754] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:31:51,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:31:51,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-29 14:31:51,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113174409] [2021-08-29 14:31:51,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 14:31:51,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:31:51,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 14:31:51,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-29 14:31:51,357 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:53,560 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 14:31:54,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:31:54,102 INFO L93 Difference]: Finished difference Result 102 states and 133 transitions. [2021-08-29 14:31:54,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-29 14:31:54,102 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-29 14:31:54,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:31:54,103 INFO L225 Difference]: With dead ends: 102 [2021-08-29 14:31:54,103 INFO L226 Difference]: Without dead ends: 98 [2021-08-29 14:31:54,103 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 125.82ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-29 14:31:54,104 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 12 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2657.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.59ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 2671.42ms IncrementalHoareTripleChecker+Time [2021-08-29 14:31:54,104 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 0 Invalid, 110 Unknown, 0 Unchecked, 0.59ms Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 1 Unknown, 27 Unchecked, 2671.42ms Time] [2021-08-29 14:31:54,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-29 14:31:54,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2021-08-29 14:31:54,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 1.3870967741935485) internal successors, (86), 63 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:54,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2021-08-29 14:31:54,116 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 18 [2021-08-29 14:31:54,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:31:54,116 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2021-08-29 14:31:54,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:54,116 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2021-08-29 14:31:54,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-29 14:31:54,117 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:31:54,117 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:31:54,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-29 14:31:54,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-08-29 14:31:54,331 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:31:54,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:31:54,332 INFO L82 PathProgramCache]: Analyzing trace with hash -2083698570, now seen corresponding path program 1 times [2021-08-29 14:31:54,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:31:54,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111153057] [2021-08-29 14:31:54,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:31:54,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:31:54,350 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:31:54,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486663186] [2021-08-29 14:31:54,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:31:54,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:31:54,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:31:54,357 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 14:31:54,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-29 14:31:54,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:31:54,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-29 14:31:54,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:31:54,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:31:54,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 14:31:54,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-29 14:31:54,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:31:54,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111153057] [2021-08-29 14:31:54,621 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:31:54,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486663186] [2021-08-29 14:31:54,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486663186] provided 1 perfect and 1 imperfect interpolant sequences [2021-08-29 14:31:54,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-29 14:31:54,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 9 [2021-08-29 14:31:54,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301144953] [2021-08-29 14:31:54,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 14:31:54,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:31:54,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 14:31:54,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-29 14:31:54,622 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:54,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:31:54,759 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2021-08-29 14:31:54,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 14:31:54,760 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-29 14:31:54,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:31:54,760 INFO L225 Difference]: With dead ends: 68 [2021-08-29 14:31:54,760 INFO L226 Difference]: Without dead ends: 62 [2021-08-29 14:31:54,761 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 48.64ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-29 14:31:54,761 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 118.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.24ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 125.51ms IncrementalHoareTripleChecker+Time [2021-08-29 14:31:54,762 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 68 Unknown, 0 Unchecked, 0.24ms Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 125.51ms Time] [2021-08-29 14:31:54,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-29 14:31:54,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2021-08-29 14:31:54,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.35) internal successors, (54), 41 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:54,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2021-08-29 14:31:54,768 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 20 [2021-08-29 14:31:54,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:31:54,768 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2021-08-29 14:31:54,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:54,768 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2021-08-29 14:31:54,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-29 14:31:54,769 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:31:54,769 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:31:54,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-08-29 14:31:54,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-29 14:31:54,973 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:31:54,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:31:54,973 INFO L82 PathProgramCache]: Analyzing trace with hash -388617808, now seen corresponding path program 2 times [2021-08-29 14:31:54,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:31:54,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250472345] [2021-08-29 14:31:54,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:31:54,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:31:54,979 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:31:54,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107731300] [2021-08-29 14:31:54,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 14:31:54,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:31:54,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:31:54,984 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 14:31:54,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-29 14:31:55,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 14:31:55,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 14:31:55,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-29 14:31:55,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:31:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:31:55,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 14:31:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:31:55,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:31:55,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250472345] [2021-08-29 14:31:55,197 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:31:55,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107731300] [2021-08-29 14:31:55,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107731300] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 14:31:55,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 14:31:55,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-29 14:31:55,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123423046] [2021-08-29 14:31:55,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-29 14:31:55,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:31:55,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-29 14:31:55,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-29 14:31:55,199 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:55,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:31:55,311 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2021-08-29 14:31:55,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-29 14:31:55,312 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-29 14:31:55,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:31:55,313 INFO L225 Difference]: With dead ends: 57 [2021-08-29 14:31:55,313 INFO L226 Difference]: Without dead ends: 49 [2021-08-29 14:31:55,313 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 44.05ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-29 14:31:55,313 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 49 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.62ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.79ms IncrementalHoareTripleChecker+Time [2021-08-29 14:31:55,314 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 0 Invalid, 105 Unknown, 0 Unchecked, 0.62ms Time], IncrementalHoareTripleChecker [3 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 81.79ms Time] [2021-08-29 14:31:55,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-29 14:31:55,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-08-29 14:31:55,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 48 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:55,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2021-08-29 14:31:55,320 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 29 [2021-08-29 14:31:55,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:31:55,320 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2021-08-29 14:31:55,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:55,320 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2021-08-29 14:31:55,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-29 14:31:55,325 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:31:55,325 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:31:55,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-29 14:31:55,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-29 14:31:55,549 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:31:55,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:31:55,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1639093375, now seen corresponding path program 3 times [2021-08-29 14:31:55,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:31:55,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210008047] [2021-08-29 14:31:55,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:31:55,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:31:55,561 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:31:55,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96944297] [2021-08-29 14:31:55,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 14:31:55,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:31:55,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:31:55,562 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 14:31:55,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-29 14:31:55,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-29 14:31:55,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-08-29 14:31:55,719 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-29 14:31:55,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 14:31:55,767 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-29 14:31:55,768 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-29 14:31:55,768 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2021-08-29 14:31:55,770 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2021-08-29 14:31:55,770 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2021-08-29 14:31:55,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-29 14:31:55,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-29 14:31:55,975 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 14:31:56,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 02:31:56 BoogieIcfgContainer [2021-08-29 14:31:56,018 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 14:31:56,018 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 14:31:56,019 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 14:31:56,019 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 14:31:56,019 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:31:37" (3/4) ... [2021-08-29 14:31:56,022 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-29 14:31:56,076 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 14:31:56,076 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 14:31:56,077 INFO L158 Benchmark]: Toolchain (without parser) took 18713.59ms. Allocated memory was 50.3MB in the beginning and 73.4MB in the end (delta: 23.1MB). Free memory was 27.4MB in the beginning and 22.2MB in the end (delta: 5.2MB). Peak memory consumption was 27.1MB. Max. memory is 16.1GB. [2021-08-29 14:31:56,077 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 50.3MB. Free memory was 32.4MB in the beginning and 32.4MB in the end (delta: 45.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 14:31:56,077 INFO L158 Benchmark]: CACSL2BoogieTranslator took 269.53ms. Allocated memory was 50.3MB in the beginning and 60.8MB in the end (delta: 10.5MB). Free memory was 27.2MB in the beginning and 44.4MB in the end (delta: -17.2MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2021-08-29 14:31:56,077 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.21ms. Allocated memory is still 60.8MB. Free memory was 44.4MB in the beginning and 42.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 14:31:56,078 INFO L158 Benchmark]: Boogie Preprocessor took 43.57ms. Allocated memory is still 60.8MB. Free memory was 42.7MB in the beginning and 41.6MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 14:31:56,078 INFO L158 Benchmark]: RCFGBuilder took 266.39ms. Allocated memory is still 60.8MB. Free memory was 41.6MB in the beginning and 32.4MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-08-29 14:31:56,078 INFO L158 Benchmark]: TraceAbstraction took 18021.74ms. Allocated memory was 60.8MB in the beginning and 73.4MB in the end (delta: 12.6MB). Free memory was 31.8MB in the beginning and 25.7MB in the end (delta: 6.1MB). Peak memory consumption was 19.8MB. Max. memory is 16.1GB. [2021-08-29 14:31:56,079 INFO L158 Benchmark]: Witness Printer took 57.60ms. Allocated memory is still 73.4MB. Free memory was 25.7MB in the beginning and 22.2MB in the end (delta: 3.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-29 14:31:56,080 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 50.3MB. Free memory was 32.4MB in the beginning and 32.4MB in the end (delta: 45.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 269.53ms. Allocated memory was 50.3MB in the beginning and 60.8MB in the end (delta: 10.5MB). Free memory was 27.2MB in the beginning and 44.4MB in the end (delta: -17.2MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.21ms. Allocated memory is still 60.8MB. Free memory was 44.4MB in the beginning and 42.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 43.57ms. Allocated memory is still 60.8MB. Free memory was 42.7MB in the beginning and 41.6MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 266.39ms. Allocated memory is still 60.8MB. Free memory was 41.6MB in the beginning and 32.4MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 18021.74ms. Allocated memory was 60.8MB in the beginning and 73.4MB in the end (delta: 12.6MB). Free memory was 31.8MB in the beginning and 25.7MB in the end (delta: 6.1MB). Peak memory consumption was 19.8MB. Max. memory is 16.1GB. * Witness Printer took 57.60ms. Allocated memory is still 73.4MB. Free memory was 25.7MB in the beginning and 22.2MB in the end (delta: 3.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [counter=0] [L21] int x, y; [L22] long long a, b, p, q; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) VAL [counter=0] [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<5 [L12] COND FALSE !(!(cond)) VAL [counter=1] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=1] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=1] [L33] EXPR counter++ VAL [counter=2] [L33] COND TRUE counter++<5 [L12] COND FALSE !(!(cond)) VAL [counter=2] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=2] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=2] [L33] EXPR counter++ VAL [counter=3] [L33] COND TRUE counter++<5 [L12] COND FALSE !(!(cond)) VAL [counter=3] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=3] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=3] [L33] EXPR counter++ VAL [counter=4] [L33] COND TRUE counter++<5 [L12] COND FALSE !(!(cond)) VAL [counter=4] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=4] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=4] [L33] EXPR counter++ VAL [counter=5] [L33] COND TRUE counter++<5 [L12] COND FALSE !(!(cond)) VAL [counter=5] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=5] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=5] [L33] EXPR counter++ VAL [counter=6] [L33] COND FALSE !(counter++<5) [L12] COND TRUE !(cond) VAL [counter=6] [L14] reach_error() VAL [counter=6] - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 17915.90ms, OverallIterations: 12, TraceHistogramMax: 6, EmptinessCheckTime: 21.49ms, AutomataDifference: 8044.69ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 11.12ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 573 SdHoareTripleChecker+Valid, 6337.49ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 573 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 6128.13ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 46 IncrementalHoareTripleChecker+Unchecked, 474 mSDsCounter, 157 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1106 IncrementalHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 157 mSolverCounterUnsat, 0 mSDtfsCounter, 1106 mSolverCounterSat, 14.16ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 247 GetRequests, 156 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 2433.47ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=8, InterpolantAutomatonStates: 81, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 113.02ms AutomataMinimizationTime, 11 MinimizatonAttempts, 187 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 66.34ms SsaConstructionTime, 309.52ms SatisfiabilityAnalysisTime, 6373.46ms InterpolantComputationTime, 193 NumberOfCodeBlocks, 193 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 220 ConstructedInterpolants, 2 QuantifiedInterpolants, 1329 SizeOfPredicates, 59 NumberOfNonLiveVariables, 896 ConjunctsInSsa, 128 ConjunctsInUnsatCore, 15 InterpolantComputations, 8 PerfectInterpolantSequences, 12/102 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-29 14:31:56,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...