./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound1.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_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/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_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/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_167893ea-79e3-4b82-ba0c-f4fa1addbece/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 e96b4706a15a135b751d9dcfc9eb745ce848cd1b ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 02:56:27,570 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:56:27,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:56:27,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:56:27,629 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:56:27,630 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:56:27,633 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:56:27,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:56:27,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:56:27,641 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:56:27,642 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:56:27,644 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:56:27,645 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:56:27,647 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:56:27,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:56:27,652 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:56:27,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:56:27,655 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:56:27,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:56:27,662 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:56:27,665 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:56:27,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:56:27,670 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:56:27,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:56:27,677 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:56:27,678 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:56:27,679 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:56:27,681 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:56:27,682 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:56:27,683 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:56:27,684 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:56:27,686 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:56:27,687 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:56:27,692 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:56:27,694 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:56:27,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:56:27,697 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:56:27,699 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:56:27,700 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:56:27,701 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:56:27,702 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:56:27,704 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:56:27,762 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:56:27,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:56:27,765 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:56:27,765 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:56:27,766 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:56:27,766 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:56:27,766 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:56:27,767 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:56:27,767 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:56:27,767 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:56:27,769 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:56:27,769 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:56:27,770 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:56:27,770 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:56:27,770 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:56:27,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:56:27,772 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:56:27,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:56:27,772 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:56:27,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:56:27,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:56:27,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:56:27,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:56:27,774 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:56:27,774 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:56:27,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:56:27,774 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:56:27,775 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:56:27,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:56:27,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:56:27,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:56:27,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:56:27,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:56:27,779 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:56:27,780 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:56:27,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:56:27,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:56:27,781 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:56:27,781 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:56:27,781 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_167893ea-79e3-4b82-ba0c-f4fa1addbece/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e96b4706a15a135b751d9dcfc9eb745ce848cd1b [2021-10-16 02:56:28,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:56:28,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:56:28,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:56:28,163 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:56:28,164 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:56:28,165 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound1.c [2021-10-16 02:56:28,246 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/data/d6a884d27/f86a212146c24c4b87b65eb92bd86112/FLAG61ec2e0e0 [2021-10-16 02:56:28,787 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:56:28,796 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound1.c [2021-10-16 02:56:28,803 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/data/d6a884d27/f86a212146c24c4b87b65eb92bd86112/FLAG61ec2e0e0 [2021-10-16 02:56:29,111 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/data/d6a884d27/f86a212146c24c4b87b65eb92bd86112 [2021-10-16 02:56:29,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:56:29,116 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:56:29,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:56:29,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:56:29,125 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:56:29,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:56:29" (1/1) ... [2021-10-16 02:56:29,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@439b03be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:56:29, skipping insertion in model container [2021-10-16 02:56:29,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:56:29" (1/1) ... [2021-10-16 02:56:29,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:56:29,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:56:29,374 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_167893ea-79e3-4b82-ba0c-f4fa1addbece/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound1.c[490,503] [2021-10-16 02:56:29,410 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:56:29,419 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:56:29,434 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_167893ea-79e3-4b82-ba0c-f4fa1addbece/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound1.c[490,503] [2021-10-16 02:56:29,449 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:56:29,469 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:56:29,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:56:29 WrapperNode [2021-10-16 02:56:29,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:56:29,471 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:56:29,472 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:56:29,472 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:56:29,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:56:29" (1/1) ... [2021-10-16 02:56:29,488 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:56:29" (1/1) ... [2021-10-16 02:56:29,520 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:56:29,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:56:29,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:56:29,524 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:56:29,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:56:29" (1/1) ... [2021-10-16 02:56:29,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:56:29" (1/1) ... [2021-10-16 02:56:29,537 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:56:29" (1/1) ... [2021-10-16 02:56:29,537 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:56:29" (1/1) ... [2021-10-16 02:56:29,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:56:29" (1/1) ... [2021-10-16 02:56:29,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:56:29" (1/1) ... [2021-10-16 02:56:29,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:56:29" (1/1) ... [2021-10-16 02:56:29,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:56:29,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:56:29,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:56:29,568 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:56:29,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:56:29" (1/1) ... [2021-10-16 02:56:29,577 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:56:29,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:56:29,603 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:56:29,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:56:29,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:56:29,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:56:29,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:56:29,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:56:30,321 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:56:30,331 INFO L299 CfgBuilder]: Removed 26 assume(true) statements. [2021-10-16 02:56:30,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:56:30 BoogieIcfgContainer [2021-10-16 02:56:30,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:56:30,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:56:30,340 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:56:30,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:56:30,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:56:29" (1/3) ... [2021-10-16 02:56:30,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa7bec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:56:30, skipping insertion in model container [2021-10-16 02:56:30,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:56:29" (2/3) ... [2021-10-16 02:56:30,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa7bec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:56:30, skipping insertion in model container [2021-10-16 02:56:30,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:56:30" (3/3) ... [2021-10-16 02:56:30,349 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound1.c [2021-10-16 02:56:30,362 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:56:30,362 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-10-16 02:56:30,420 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:56:30,429 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 02:56:30,429 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-16 02:56:30,472 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 32 states have internal predecessors, (44), 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 02:56:30,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 02:56:30,478 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:56:30,491 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 02:56:30,492 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-16 02:56:30,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:56:30,513 INFO L82 PathProgramCache]: Analyzing trace with hash 169560536, now seen corresponding path program 1 times [2021-10-16 02:56:30,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:56:30,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360714874] [2021-10-16 02:56:30,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:30,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:56:30,611 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:56:30,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1766061811] [2021-10-16 02:56:30,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:30,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:56:30,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:56:30,615 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:56:30,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:56:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:56:30,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 02:56:30,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:56:30,746 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 02:56:30,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:56:30,765 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 02:56:30,765 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:56:30,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360714874] [2021-10-16 02:56:30,766 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:56:30,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766061811] [2021-10-16 02:56:30,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766061811] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:56:30,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:56:30,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:56:30,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537395363] [2021-10-16 02:56:30,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 02:56:30,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:56:30,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 02:56:30,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:56:30,795 INFO L87 Difference]: Start difference. First operand has 33 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 32 states have internal predecessors, (44), 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 02:56:30,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:56:30,816 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2021-10-16 02:56:30,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 02:56:30,817 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 02:56:30,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:56:30,830 INFO L225 Difference]: With dead ends: 65 [2021-10-16 02:56:30,831 INFO L226 Difference]: Without dead ends: 31 [2021-10-16 02:56:30,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 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 02:56:30,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-16 02:56:30,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-16 02:56:30,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.36) internal successors, (34), 30 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) [2021-10-16 02:56:30,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-10-16 02:56:30,877 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 5 [2021-10-16 02:56:30,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:56:30,877 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-10-16 02:56:30,878 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 02:56:30,879 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-10-16 02:56:30,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:56:30,880 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:56:30,880 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:56:30,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-16 02:56:31,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-16 02:56:31,095 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-16 02:56:31,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:56:31,096 INFO L82 PathProgramCache]: Analyzing trace with hash 890891193, now seen corresponding path program 1 times [2021-10-16 02:56:31,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:56:31,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848687524] [2021-10-16 02:56:31,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:31,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:56:31,114 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:56:31,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [179872139] [2021-10-16 02:56:31,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:31,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:56:31,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:56:31,116 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:56:31,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-16 02:56:31,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:56:31,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:56:31,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:56:31,299 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 02:56:31,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:56:31,357 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 02:56:31,357 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:56:31,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848687524] [2021-10-16 02:56:31,359 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:56:31,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179872139] [2021-10-16 02:56:31,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179872139] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:56:31,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:56:31,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:56:31,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155763205] [2021-10-16 02:56:31,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:56:31,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:56:31,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:56:31,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:56:31,370 INFO L87 Difference]: Start difference. First operand 31 states and 34 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 02:56:31,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:56:31,406 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-10-16 02:56:31,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:56:31,408 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 02:56:31,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:56:31,411 INFO L225 Difference]: With dead ends: 41 [2021-10-16 02:56:31,411 INFO L226 Difference]: Without dead ends: 33 [2021-10-16 02:56:31,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:56:31,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-16 02:56:31,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-10-16 02:56:31,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 32 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 02:56:31,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-10-16 02:56:31,426 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 6 [2021-10-16 02:56:31,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:56:31,426 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-10-16 02:56:31,427 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 02:56:31,427 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-10-16 02:56:31,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 02:56:31,428 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:56:31,429 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:56:31,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:56:31,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:56:31,644 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-16 02:56:31,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:56:31,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1847641631, now seen corresponding path program 1 times [2021-10-16 02:56:31,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:56:31,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041386683] [2021-10-16 02:56:31,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:31,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:56:31,653 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:56:31,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1631198696] [2021-10-16 02:56:31,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:31,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:56:31,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:56:31,656 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:56:31,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-16 02:56:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:56:31,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:56:31,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:56:31,783 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 02:56:31,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:56:31,831 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 02:56:31,831 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:56:31,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041386683] [2021-10-16 02:56:31,832 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:56:31,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631198696] [2021-10-16 02:56:31,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631198696] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:56:31,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:56:31,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:56:31,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304016699] [2021-10-16 02:56:31,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:56:31,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:56:31,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:56:31,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:56:31,838 INFO L87 Difference]: Start difference. First operand 33 states and 36 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 02:56:31,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:56:31,886 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2021-10-16 02:56:31,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:56:31,887 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 02:56:31,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:56:31,890 INFO L225 Difference]: With dead ends: 61 [2021-10-16 02:56:31,890 INFO L226 Difference]: Without dead ends: 53 [2021-10-16 02:56:31,891 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:56:31,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-16 02:56:31,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2021-10-16 02:56:31,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 33 states have internal predecessors, (37), 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 02:56:31,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-10-16 02:56:31,908 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 7 [2021-10-16 02:56:31,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:56:31,908 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-10-16 02:56:31,908 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 02:56:31,910 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-10-16 02:56:31,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:56:31,911 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:56:31,911 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:56:31,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:56:32,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:56:32,128 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-16 02:56:32,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:56:32,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1442287066, now seen corresponding path program 1 times [2021-10-16 02:56:32,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:56:32,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178558826] [2021-10-16 02:56:32,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:32,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:56:32,137 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:56:32,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1927892363] [2021-10-16 02:56:32,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:32,137 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:56:32,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:56:32,139 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:56:32,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-16 02:56:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:56:32,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:56:32,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:56:32,284 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 02:56:32,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:56:32,325 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 02:56:32,326 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:56:32,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178558826] [2021-10-16 02:56:32,326 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:56:32,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927892363] [2021-10-16 02:56:32,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927892363] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:56:32,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:56:32,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-16 02:56:32,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373076635] [2021-10-16 02:56:32,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:56:32,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:56:32,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:56:32,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:56:32,333 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 5 states, 5 states have (on average 1.6) 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) [2021-10-16 02:56:32,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:56:32,374 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2021-10-16 02:56:32,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:56:32,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) 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 [2021-10-16 02:56:32,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:56:32,377 INFO L225 Difference]: With dead ends: 48 [2021-10-16 02:56:32,377 INFO L226 Difference]: Without dead ends: 18 [2021-10-16 02:56:32,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:56:32,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-16 02:56:32,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-16 02:56:32,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 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 02:56:32,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-10-16 02:56:32,387 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2021-10-16 02:56:32,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:56:32,388 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-10-16 02:56:32,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) 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) [2021-10-16 02:56:32,391 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-10-16 02:56:32,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 02:56:32,392 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:56:32,392 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:56:32,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:56:32,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:56:32,616 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-16 02:56:32,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:56:32,617 INFO L82 PathProgramCache]: Analyzing trace with hash 971784697, now seen corresponding path program 1 times [2021-10-16 02:56:32,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:56:32,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183989534] [2021-10-16 02:56:32,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:32,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:56:32,624 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:56:32,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889160652] [2021-10-16 02:56:32,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:32,624 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:56:32,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:56:32,626 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:56:32,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-16 02:56:32,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:56:32,719 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 02:56:32,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:56:32,766 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-16 02:56:32,767 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 02:56:32,768 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:56:32,770 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:56:32,771 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:56:32,771 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:56:32,772 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:56:32,772 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:56:32,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:56:33,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:56:33,009 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:56:33,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:56:33 BoogieIcfgContainer [2021-10-16 02:56:33,045 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:56:33,046 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:56:33,046 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:56:33,046 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:56:33,047 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:56:30" (3/4) ... [2021-10-16 02:56:33,049 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-16 02:56:33,116 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:56:33,116 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:56:33,118 INFO L168 Benchmark]: Toolchain (without parser) took 4000.63 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 51.7 MB in the beginning and 53.8 MB in the end (delta: -2.1 MB). Peak memory consumption was 17.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:56:33,119 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 86.0 MB. Free memory was 55.9 MB in the beginning and 55.9 MB in the end (delta: 30.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:56:33,120 INFO L168 Benchmark]: CACSL2BoogieTranslator took 350.35 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 51.6 MB in the beginning and 80.7 MB in the end (delta: -29.2 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:56:33,120 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.33 ms. Allocated memory is still 104.9 MB. Free memory was 80.7 MB in the beginning and 78.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:56:33,121 INFO L168 Benchmark]: Boogie Preprocessor took 42.40 ms. Allocated memory is still 104.9 MB. Free memory was 78.9 MB in the beginning and 77.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:56:33,122 INFO L168 Benchmark]: RCFGBuilder took 770.55 ms. Allocated memory is still 104.9 MB. Free memory was 77.5 MB in the beginning and 60.3 MB in the end (delta: 17.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:56:33,123 INFO L168 Benchmark]: TraceAbstraction took 2705.56 ms. Allocated memory is still 104.9 MB. Free memory was 59.8 MB in the beginning and 56.6 MB in the end (delta: 3.2 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:56:33,123 INFO L168 Benchmark]: Witness Printer took 70.54 ms. Allocated memory is still 104.9 MB. Free memory was 56.6 MB in the beginning and 53.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:56:33,134 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 86.0 MB. Free memory was 55.9 MB in the beginning and 55.9 MB in the end (delta: 30.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 350.35 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 51.6 MB in the beginning and 80.7 MB in the end (delta: -29.2 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 51.33 ms. Allocated memory is still 104.9 MB. Free memory was 80.7 MB in the beginning and 78.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.40 ms. Allocated memory is still 104.9 MB. Free memory was 78.9 MB in the beginning and 77.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 770.55 ms. Allocated memory is still 104.9 MB. Free memory was 77.5 MB in the beginning and 60.3 MB in the end (delta: 17.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2705.56 ms. Allocated memory is still 104.9 MB. Free memory was 59.8 MB in the beginning and 56.6 MB in the end (delta: 3.2 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Witness Printer took 70.54 ms. Allocated memory is still 104.9 MB. Free memory was 56.6 MB in the beginning and 53.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 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, c, k, xy, yy; [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 [L33] c = 0 [L34] k = 0 [L35] xy = (long long) x * y [L36] yy = (long long) y * y [L8] COND FALSE !(!cond) [L8] COND FALSE !(!cond) VAL [counter=0] [L40] EXPR counter++ VAL [counter=1] [L40] COND TRUE counter++<1 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [counter=1] [L46] EXPR counter++ VAL [counter=2] [L46] COND FALSE !(counter++<1) [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [counter=2] [L40] EXPR counter++ VAL [counter=3] [L40] COND FALSE !(counter++<1) [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. - 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, 6 error locations. Started 1 CEGAR loops. OverallTime: 2589.6ms, OverallIterations: 5, TraceHistogramMax: 2, EmptinessCheckTime: 21.1ms, AutomataDifference: 211.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 31.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 108 SDtfs, 33 SDslu, 97 SDs, 0 SdLazy, 33 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 51.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=3, InterpolantAutomatonStates: 14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 59.1ms AutomataMinimizationTime, 4 MinimizatonAttempts, 19 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 42.5ms SsaConstructionTime, 113.9ms SatisfiabilityAnalysisTime, 418.7ms InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 84 SizeOfPredicates, 2 NumberOfNonLiveVariables, 316 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 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 02:56:33,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167893ea-79e3-4b82-ba0c-f4fa1addbece/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...