./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ee6f4ba937d52a63ff8049638c977b1c01237212 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-dev-5709675 [2021-10-16 03:18:43,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:18:43,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:18:43,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:18:43,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:18:43,565 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:18:43,566 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:18:43,569 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:18:43,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:18:43,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:18:43,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:18:43,575 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:18:43,576 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:18:43,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:18:43,579 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:18:43,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:18:43,583 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:18:43,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:18:43,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:18:43,590 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:18:43,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:18:43,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:18:43,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:18:43,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:18:43,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:18:43,602 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:18:43,602 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:18:43,604 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:18:43,604 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:18:43,607 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:18:43,609 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:18:43,610 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:18:43,611 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:18:43,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:18:43,614 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:18:43,616 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:18:43,617 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:18:43,617 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:18:43,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:18:43,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:18:43,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:18:43,621 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 03:18:43,671 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:18:43,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:18:43,673 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:18:43,673 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:18:43,674 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:18:43,674 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:18:43,674 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 03:18:43,674 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:18:43,675 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:18:43,675 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 03:18:43,676 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 03:18:43,676 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:18:43,676 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 03:18:43,677 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 03:18:43,677 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 03:18:43,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:18:43,678 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:18:43,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 03:18:43,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:18:43,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:18:43,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 03:18:43,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:18:43,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 03:18:43,680 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:18:43,680 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:18:43,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 03:18:43,680 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:18:43,681 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 03:18:43,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:18:43,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:18:43,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:18:43,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:18:43,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:18:43,684 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 03:18:43,684 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 03:18:43,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 03:18:43,684 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 03:18:43,685 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:18:43,685 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:18:43,685 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee6f4ba937d52a63ff8049638c977b1c01237212 [2021-10-16 03:18:44,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:18:44,067 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:18:44,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:18:44,071 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:18:44,072 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:18:44,073 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound2.c [2021-10-16 03:18:44,142 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/data/0299ff079/3ec0763ea149470aafafe2408c180192/FLAG693f011aa [2021-10-16 03:18:44,680 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:18:44,680 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound2.c [2021-10-16 03:18:44,697 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/data/0299ff079/3ec0763ea149470aafafe2408c180192/FLAG693f011aa [2021-10-16 03:18:45,045 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/data/0299ff079/3ec0763ea149470aafafe2408c180192 [2021-10-16 03:18:45,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:18:45,051 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:18:45,055 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:18:45,056 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:18:45,060 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:18:45,061 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:18:45" (1/1) ... [2021-10-16 03:18:45,063 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f6ee684 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:18:45, skipping insertion in model container [2021-10-16 03:18:45,063 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:18:45" (1/1) ... [2021-10-16 03:18:45,070 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:18:45,103 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:18:45,272 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound2.c[490,503] [2021-10-16 03:18:45,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:18:45,301 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:18:45,313 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound2.c[490,503] [2021-10-16 03:18:45,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:18:45,336 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:18:45,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:18:45 WrapperNode [2021-10-16 03:18:45,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:18:45,338 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:18:45,338 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:18:45,338 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:18:45,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:18:45" (1/1) ... [2021-10-16 03:18:45,352 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:18:45" (1/1) ... [2021-10-16 03:18:45,375 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:18:45,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:18:45,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:18:45,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:18:45,384 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:18:45" (1/1) ... [2021-10-16 03:18:45,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:18:45" (1/1) ... [2021-10-16 03:18:45,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:18:45" (1/1) ... [2021-10-16 03:18:45,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:18:45" (1/1) ... [2021-10-16 03:18:45,391 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:18:45" (1/1) ... [2021-10-16 03:18:45,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:18:45" (1/1) ... [2021-10-16 03:18:45,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:18:45" (1/1) ... [2021-10-16 03:18:45,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:18:45,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:18:45,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:18:45,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:18:45,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:18:45" (1/1) ... [2021-10-16 03:18:45,409 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:18:45,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:18:45,433 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:18:45,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:18:45,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 03:18:45,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:18:45,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:18:45,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:18:45,821 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:18:45,822 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-16 03:18:45,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:18:45 BoogieIcfgContainer [2021-10-16 03:18:45,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:18:45,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:18:45,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:18:45,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:18:45,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:18:45" (1/3) ... [2021-10-16 03:18:45,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f58e0db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:18:45, skipping insertion in model container [2021-10-16 03:18:45,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:18:45" (2/3) ... [2021-10-16 03:18:45,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f58e0db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:18:45, skipping insertion in model container [2021-10-16 03:18:45,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:18:45" (3/3) ... [2021-10-16 03:18:45,833 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound2.c [2021-10-16 03:18:45,838 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:18:45,839 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-10-16 03:18:45,906 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:18:45,912 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 [2021-10-16 03:18:45,913 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-16 03:18:45,928 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 32 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) [2021-10-16 03:18:45,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 03:18:45,940 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:18:45,941 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 03:18:45,943 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-16 03:18:45,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:18:45,950 INFO L82 PathProgramCache]: Analyzing trace with hash 160510030, now seen corresponding path program 1 times [2021-10-16 03:18:45,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:18:45,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485194609] [2021-10-16 03:18:45,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:18:45,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:18:46,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:18:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:18:46,166 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:18:46,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485194609] [2021-10-16 03:18:46,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485194609] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:18:46,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:18:46,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 03:18:46,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973300547] [2021-10-16 03:18:46,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 03:18:46,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:18:46,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 03:18:46,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 03:18:46,199 INFO L87 Difference]: Start difference. First operand has 33 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 32 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) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-10-16 03:18:46,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:18:46,224 INFO L93 Difference]: Finished difference Result 65 states and 91 transitions. [2021-10-16 03:18:46,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 03:18:46,226 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2021-10-16 03:18:46,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:18:46,236 INFO L225 Difference]: With dead ends: 65 [2021-10-16 03:18:46,237 INFO L226 Difference]: Without dead ends: 31 [2021-10-16 03:18:46,241 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 03:18:46,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-16 03:18:46,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-16 03:18:46,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 30 states have internal predecessors, (36), 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) [2021-10-16 03:18:46,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-10-16 03:18:46,280 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 5 [2021-10-16 03:18:46,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:18:46,281 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-10-16 03:18:46,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-10-16 03:18:46,281 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-10-16 03:18:46,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 03:18:46,282 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:18:46,282 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 03:18:46,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 03:18:46,283 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-16 03:18:46,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:18:46,284 INFO L82 PathProgramCache]: Analyzing trace with hash 592212585, now seen corresponding path program 1 times [2021-10-16 03:18:46,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:18:46,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209238974] [2021-10-16 03:18:46,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:18:46,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:18:46,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:18:46,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:18:46,343 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:18:46,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209238974] [2021-10-16 03:18:46,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209238974] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:18:46,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:18:46,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 03:18:46,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097706634] [2021-10-16 03:18:46,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:18:46,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:18:46,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:18:46,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:18:46,348 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:18:46,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:18:46,370 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-10-16 03:18:46,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:18:46,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-16 03:18:46,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:18:46,372 INFO L225 Difference]: With dead ends: 37 [2021-10-16 03:18:46,372 INFO L226 Difference]: Without dead ends: 33 [2021-10-16 03:18:46,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:18:46,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-16 03:18:46,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-10-16 03:18:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 32 states have internal predecessors, (38), 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) [2021-10-16 03:18:46,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-10-16 03:18:46,379 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 6 [2021-10-16 03:18:46,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:18:46,379 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-10-16 03:18:46,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:18:46,380 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-10-16 03:18:46,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 03:18:46,380 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:18:46,380 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:18:46,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 03:18:46,381 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-16 03:18:46,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:18:46,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1177973352, now seen corresponding path program 1 times [2021-10-16 03:18:46,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:18:46,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911290170] [2021-10-16 03:18:46,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:18:46,383 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:18:46,398 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 03:18:46,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2095885039] [2021-10-16 03:18:46,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:18:46,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:18:46,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:18:46,401 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:18:46,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 03:18:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:18:46,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 03:18:46,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:18:46,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:18:46,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:18:46,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:18:46,630 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:18:46,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911290170] [2021-10-16 03:18:46,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 03:18:46,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095885039] [2021-10-16 03:18:46,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095885039] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:18:46,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:18:46,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 03:18:46,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147051856] [2021-10-16 03:18:46,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:18:46,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:18:46,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:18:46,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:18:46,634 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:18:46,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:18:46,663 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-10-16 03:18:46,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:18:46,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-16 03:18:46,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:18:46,665 INFO L225 Difference]: With dead ends: 61 [2021-10-16 03:18:46,665 INFO L226 Difference]: Without dead ends: 57 [2021-10-16 03:18:46,666 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:18:46,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-16 03:18:46,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2021-10-16 03:18:46,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 33 states have internal predecessors, (39), 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) [2021-10-16 03:18:46,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-10-16 03:18:46,672 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 7 [2021-10-16 03:18:46,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:18:46,673 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-10-16 03:18:46,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:18:46,677 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-10-16 03:18:46,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 03:18:46,678 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:18:46,678 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:18:46,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 03:18:46,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:18:46,905 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-16 03:18:46,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:18:46,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1175714080, now seen corresponding path program 1 times [2021-10-16 03:18:46,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:18:46,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903126146] [2021-10-16 03:18:46,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:18:46,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:18:46,940 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 03:18:46,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618521324] [2021-10-16 03:18:46,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:18:46,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:18:46,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:18:46,944 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:18:46,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-16 03:18:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:18:47,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 03:18:47,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:18:47,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:18:47,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:18:47,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:18:47,186 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:18:47,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903126146] [2021-10-16 03:18:47,186 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 03:18:47,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618521324] [2021-10-16 03:18:47,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618521324] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:18:47,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:18:47,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-16 03:18:47,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772395224] [2021-10-16 03:18:47,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 03:18:47,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:18:47,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 03:18:47,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-16 03:18:47,190 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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) [2021-10-16 03:18:47,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:18:47,222 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2021-10-16 03:18:47,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 03:18:47,223 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 [2021-10-16 03:18:47,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:18:47,224 INFO L225 Difference]: With dead ends: 49 [2021-10-16 03:18:47,224 INFO L226 Difference]: Without dead ends: 19 [2021-10-16 03:18:47,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-16 03:18:47,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-16 03:18:47,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-10-16 03:18:47,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:18:47,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-10-16 03:18:47,229 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-10-16 03:18:47,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:18:47,229 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-10-16 03:18:47,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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) [2021-10-16 03:18:47,230 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-10-16 03:18:47,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 03:18:47,231 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:18:47,231 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:18:47,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-16 03:18:47,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:18:47,455 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-16 03:18:47,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:18:47,455 INFO L82 PathProgramCache]: Analyzing trace with hash -2121654826, now seen corresponding path program 1 times [2021-10-16 03:18:47,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:18:47,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848558363] [2021-10-16 03:18:47,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:18:47,456 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:18:47,471 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 03:18:47,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2067883505] [2021-10-16 03:18:47,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:18:47,472 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:18:47,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:18:47,473 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:18:47,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-16 03:18:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:18:47,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 03:18:47,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:18:47,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:18:47,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:18:47,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:18:47,654 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:18:47,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848558363] [2021-10-16 03:18:47,655 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 03:18:47,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067883505] [2021-10-16 03:18:47,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067883505] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:18:47,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:18:47,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-16 03:18:47,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920114773] [2021-10-16 03:18:47,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 03:18:47,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:18:47,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 03:18:47,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:18:47,658 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:18:47,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:18:47,678 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-10-16 03:18:47,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 03:18:47,679 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-16 03:18:47,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:18:47,680 INFO L225 Difference]: With dead ends: 34 [2021-10-16 03:18:47,680 INFO L226 Difference]: Without dead ends: 20 [2021-10-16 03:18:47,680 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:18:47,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-16 03:18:47,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-16 03:18:47,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:18:47,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-10-16 03:18:47,684 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-10-16 03:18:47,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:18:47,685 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-10-16 03:18:47,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:18:47,685 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-10-16 03:18:47,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-16 03:18:47,686 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:18:47,686 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:18:47,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-16 03:18:47,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:18:47,913 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-16 03:18:47,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:18:47,914 INFO L82 PathProgramCache]: Analyzing trace with hash 222893626, now seen corresponding path program 1 times [2021-10-16 03:18:47,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:18:47,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769417605] [2021-10-16 03:18:47,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:18:47,914 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:18:47,928 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 03:18:47,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773463155] [2021-10-16 03:18:47,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:18:47,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:18:47,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:18:47,930 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:18:47,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-16 03:18:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 03:18:47,999 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 03:18:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 03:18:48,038 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-16 03:18:48,038 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 03:18:48,039 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 03:18:48,041 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 03:18:48,042 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 03:18:48,042 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 03:18:48,042 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 03:18:48,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-16 03:18:48,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:18:48,274 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 03:18:48,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 03:18:48 BoogieIcfgContainer [2021-10-16 03:18:48,304 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 03:18:48,304 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 03:18:48,304 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 03:18:48,305 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 03:18:48,305 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:18:45" (3/4) ... [2021-10-16 03:18:48,307 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-16 03:18:48,395 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 03:18:48,395 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 03:18:48,406 INFO L168 Benchmark]: Toolchain (without parser) took 3353.53 ms. Allocated memory was 77.6 MB in the beginning and 119.5 MB in the end (delta: 41.9 MB). Free memory was 41.8 MB in the beginning and 95.3 MB in the end (delta: -53.5 MB). Peak memory consumption was 23.7 MB. Max. memory is 16.1 GB. [2021-10-16 03:18:48,406 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 77.6 MB. Free memory is still 57.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:18:48,407 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.78 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 41.6 MB in the beginning and 70.5 MB in the end (delta: -28.9 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. [2021-10-16 03:18:48,408 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.08 ms. Allocated memory is still 94.4 MB. Free memory was 70.4 MB in the beginning and 68.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:18:48,410 INFO L168 Benchmark]: Boogie Preprocessor took 24.19 ms. Allocated memory is still 94.4 MB. Free memory was 68.7 MB in the beginning and 67.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:18:48,410 INFO L168 Benchmark]: RCFGBuilder took 424.14 ms. Allocated memory is still 94.4 MB. Free memory was 67.4 MB in the beginning and 52.9 MB in the end (delta: 14.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-16 03:18:48,411 INFO L168 Benchmark]: TraceAbstraction took 2477.66 ms. Allocated memory is still 94.4 MB. Free memory was 52.5 MB in the beginning and 37.0 MB in the end (delta: 15.5 MB). Peak memory consumption was 17.8 MB. Max. memory is 16.1 GB. [2021-10-16 03:18:48,411 INFO L168 Benchmark]: Witness Printer took 100.25 ms. Allocated memory was 94.4 MB in the beginning and 119.5 MB in the end (delta: 25.2 MB). Free memory was 37.0 MB in the beginning and 95.3 MB in the end (delta: -58.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:18:48,416 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 77.6 MB. Free memory is still 57.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 281.78 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 41.6 MB in the beginning and 70.5 MB in the end (delta: -28.9 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.08 ms. Allocated memory is still 94.4 MB. Free memory was 70.4 MB in the beginning and 68.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.19 ms. Allocated memory is still 94.4 MB. Free memory was 68.7 MB in the beginning and 67.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 424.14 ms. Allocated memory is still 94.4 MB. Free memory was 67.4 MB in the beginning and 52.9 MB in the end (delta: 14.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2477.66 ms. Allocated memory is still 94.4 MB. Free memory was 52.5 MB in the beginning and 37.0 MB in the end (delta: 15.5 MB). Peak memory consumption was 17.8 MB. Max. memory is 16.1 GB. * Witness Printer took 100.25 ms. Allocated memory was 94.4 MB in the beginning and 119.5 MB in the end (delta: 25.2 MB). Free memory was 37.0 MB in the beginning and 95.3 MB in the end (delta: -58.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L8] COND FALSE !(!cond) [L8] COND FALSE !(!cond) [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<2 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [counter=1] [L41] EXPR counter++ VAL [counter=2] [L41] COND TRUE counter++<2 [L42] COND TRUE !(c >= b) VAL [counter=2] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [counter=2] [L34] EXPR counter++ VAL [counter=3] [L34] COND FALSE !(counter++<2) [L11] COND TRUE !(cond) VAL [counter=3] [L13] reach_error() VAL [counter=3] - UnprovableResult [Line: 13]: 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: 13]: 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: 13]: 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: 13]: 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, 33 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 2368.5ms, OverallIterations: 6, TraceHistogramMax: 2, EmptinessCheckTime: 19.9ms, AutomataDifference: 180.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 132 SDtfs, 62 SDslu, 146 SDs, 0 SdLazy, 55 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 53.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 47.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=3, InterpolantAutomatonStates: 20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 42.5ms AutomataMinimizationTime, 5 MinimizatonAttempts, 24 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 48.2ms SsaConstructionTime, 151.1ms SatisfiabilityAnalysisTime, 519.6ms InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 63 ConstructedInterpolants, 0 QuantifiedInterpolants, 131 SizeOfPredicates, 6 NumberOfNonLiveVariables, 252 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 4/4 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! [2021-10-16 03:18:48,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfe11f3-f3a0-4b1d-93fa-007aeb2f4898/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...