./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 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cb330-b39d-4557-bc94-1ea38b9826e7/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cb330-b39d-4557-bc94-1ea38b9826e7/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cb330-b39d-4557-bc94-1ea38b9826e7/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cb330-b39d-4557-bc94-1ea38b9826e7/bin/utaipan-WLngWcDbfI/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_1b3cb330-b39d-4557-bc94-1ea38b9826e7/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cb330-b39d-4557-bc94-1ea38b9826e7/bin/utaipan-WLngWcDbfI --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 0.2.0-7b2dab5 [2021-10-11 02:29:30,673 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:29:30,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:29:30,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:29:30,718 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:29:30,720 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:29:30,721 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:29:30,724 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:29:30,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:29:30,728 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:29:30,729 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:29:30,730 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:29:30,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:29:30,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:29:30,734 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:29:30,735 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:29:30,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:29:30,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:29:30,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:29:30,743 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:29:30,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:29:30,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:29:30,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:29:30,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:29:30,761 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:29:30,761 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:29:30,762 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:29:30,763 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:29:30,763 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:29:30,765 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:29:30,765 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:29:30,766 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:29:30,767 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:29:30,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:29:30,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:29:30,776 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:29:30,777 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:29:30,777 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:29:30,778 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:29:30,779 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:29:30,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:29:30,783 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cb330-b39d-4557-bc94-1ea38b9826e7/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:29:30,833 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:29:30,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:29:30,839 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:29:30,839 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:29:30,839 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:29:30,839 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:29:30,840 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:29:30,840 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:29:30,846 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:29:30,846 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:29:30,846 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:29:30,846 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:29:30,847 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:29:30,847 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:29:30,847 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:29:30,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:29:30,848 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:29:30,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:29:30,849 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:29:30,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:29:30,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:29:30,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:29:30,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:29:30,850 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:29:30,850 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:29:30,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:29:30,851 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:29:30,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:29:30,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:29:30,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:29:30,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:29:30,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:29:30,853 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:29:30,853 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:29:30,853 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:29:30,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:29:30,854 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:29:30,854 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:29:30,854 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:29:30,855 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_1b3cb330-b39d-4557-bc94-1ea38b9826e7/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cb330-b39d-4557-bc94-1ea38b9826e7/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e96b4706a15a135b751d9dcfc9eb745ce848cd1b [2021-10-11 02:29:31,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:29:31,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:29:31,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:29:31,190 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:29:31,191 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:29:31,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cb330-b39d-4557-bc94-1ea38b9826e7/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound1.c [2021-10-11 02:29:31,266 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cb330-b39d-4557-bc94-1ea38b9826e7/bin/utaipan-WLngWcDbfI/data/0779bc358/dde7e7cbffe24f8b9510b6358355f5b7/FLAG8a7c2f7b1 [2021-10-11 02:29:31,675 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:29:31,676 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cb330-b39d-4557-bc94-1ea38b9826e7/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound1.c [2021-10-11 02:29:31,682 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cb330-b39d-4557-bc94-1ea38b9826e7/bin/utaipan-WLngWcDbfI/data/0779bc358/dde7e7cbffe24f8b9510b6358355f5b7/FLAG8a7c2f7b1 [2021-10-11 02:29:32,080 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cb330-b39d-4557-bc94-1ea38b9826e7/bin/utaipan-WLngWcDbfI/data/0779bc358/dde7e7cbffe24f8b9510b6358355f5b7 [2021-10-11 02:29:32,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:29:32,086 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:29:32,090 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:29:32,090 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:29:32,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:29:32,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:29:32" (1/1) ... [2021-10-11 02:29:32,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60aa1ff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:32, skipping insertion in model container [2021-10-11 02:29:32,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:29:32" (1/1) ... [2021-10-11 02:29:32,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:29:32,174 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:29:32,334 WARN L226 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_1b3cb330-b39d-4557-bc94-1ea38b9826e7/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound1.c[490,503] [2021-10-11 02:29:32,354 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:29:32,361 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:29:32,372 WARN L226 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_1b3cb330-b39d-4557-bc94-1ea38b9826e7/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound1.c[490,503] [2021-10-11 02:29:32,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:29:32,397 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:29:32,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:32 WrapperNode [2021-10-11 02:29:32,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:29:32,399 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:29:32,399 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:29:32,399 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:29:32,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:32" (1/1) ... [2021-10-11 02:29:32,415 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:32" (1/1) ... [2021-10-11 02:29:32,439 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:29:32,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:29:32,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:29:32,440 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:29:32,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:32" (1/1) ... [2021-10-11 02:29:32,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:32" (1/1) ... [2021-10-11 02:29:32,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:32" (1/1) ... [2021-10-11 02:29:32,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:32" (1/1) ... [2021-10-11 02:29:32,456 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:32" (1/1) ... [2021-10-11 02:29:32,461 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:32" (1/1) ... [2021-10-11 02:29:32,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:32" (1/1) ... [2021-10-11 02:29:32,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:29:32,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:29:32,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:29:32,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:29:32,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:32" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cb330-b39d-4557-bc94-1ea38b9826e7/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:29:32,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:29:32,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:29:32,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:29:32,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:29:33,135 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:29:33,135 INFO L299 CfgBuilder]: Removed 26 assume(true) statements. [2021-10-11 02:29:33,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:33 BoogieIcfgContainer [2021-10-11 02:29:33,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:29:33,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:29:33,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:29:33,144 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:29:33,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:29:32" (1/3) ... [2021-10-11 02:29:33,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56e5ba3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:29:33, skipping insertion in model container [2021-10-11 02:29:33,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:32" (2/3) ... [2021-10-11 02:29:33,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56e5ba3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:29:33, skipping insertion in model container [2021-10-11 02:29:33,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:33" (3/3) ... [2021-10-11 02:29:33,148 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound1.c [2021-10-11 02:29:33,164 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:29:33,176 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2021-10-11 02:29:33,188 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-11 02:29:33,218 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:29:33,222 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:29:33,222 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:29:33,222 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:29:33,222 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:29:33,223 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:29:33,223 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:29:33,223 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:29:33,245 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2021-10-11 02:29:33,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:29:33,259 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:33,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:29:33,261 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:33,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:33,267 INFO L82 PathProgramCache]: Analyzing trace with hash 169560536, now seen corresponding path program 1 times [2021-10-11 02:29:33,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:33,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355617678] [2021-10-11 02:29:33,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:33,394 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:29:33,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868671784] [2021-10-11 02:29:33,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cb330-b39d-4557-bc94-1ea38b9826e7/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:33,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:33,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-11 02:29:33,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:29:33,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:33,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:29:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:33,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355617678] [2021-10-11 02:29:33,542 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:29:33,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868671784] [2021-10-11 02:29:33,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:33,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-11 02:29:33,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932069534] [2021-10-11 02:29:33,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 02:29:33,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:33,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 02:29:33,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:29:33,566 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2021-10-11 02:29:33,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:33,581 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2021-10-11 02:29:33,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:29:33,582 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2021-10-11 02:29:33,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:33,591 INFO L225 Difference]: With dead ends: 65 [2021-10-11 02:29:33,591 INFO L226 Difference]: Without dead ends: 31 [2021-10-11 02:29:33,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:29:33,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-11 02:29:33,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-11 02:29:33,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 02:29:33,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-10-11 02:29:33,625 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 5 [2021-10-11 02:29:33,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:33,626 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-10-11 02:29:33,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 02:29:33,626 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-10-11 02:29:33,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:29:33,626 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:33,627 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:29:33,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-11 02:29:33,843 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:33,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:33,844 INFO L82 PathProgramCache]: Analyzing trace with hash 890891193, now seen corresponding path program 1 times [2021-10-11 02:29:33,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:33,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600533467] [2021-10-11 02:29:33,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:33,852 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:29:33,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [330071495] [2021-10-11 02:29:33,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cb330-b39d-4557-bc94-1ea38b9826e7/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:33,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:29:33,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:29:34,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:34,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:29:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:34,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600533467] [2021-10-11 02:29:34,090 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:29:34,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330071495] [2021-10-11 02:29:34,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:34,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-11 02:29:34,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042862232] [2021-10-11 02:29:34,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:29:34,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:34,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:29:34,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:29:34,098 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 4 states. [2021-10-11 02:29:34,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:34,139 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-10-11 02:29:34,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:29:34,139 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-10-11 02:29:34,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:34,141 INFO L225 Difference]: With dead ends: 41 [2021-10-11 02:29:34,141 INFO L226 Difference]: Without dead ends: 33 [2021-10-11 02:29:34,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:29:34,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-11 02:29:34,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-10-11 02:29:34,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-10-11 02:29:34,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-10-11 02:29:34,149 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 6 [2021-10-11 02:29:34,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:34,149 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-10-11 02:29:34,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:29:34,149 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-10-11 02:29:34,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:29:34,150 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:34,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:29:34,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:34,371 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:34,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:34,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1847641631, now seen corresponding path program 1 times [2021-10-11 02:29:34,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:34,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262225974] [2021-10-11 02:29:34,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:34,377 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:29:34,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044559662] [2021-10-11 02:29:34,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cb330-b39d-4557-bc94-1ea38b9826e7/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:34,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:29:34,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:29:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:34,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:29:34,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:34,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262225974] [2021-10-11 02:29:34,467 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:29:34,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044559662] [2021-10-11 02:29:34,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:34,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-11 02:29:34,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384967477] [2021-10-11 02:29:34,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:29:34,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:34,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:29:34,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:29:34,470 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 3 states. [2021-10-11 02:29:34,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:34,524 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2021-10-11 02:29:34,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:29:34,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2021-10-11 02:29:34,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:34,530 INFO L225 Difference]: With dead ends: 61 [2021-10-11 02:29:34,531 INFO L226 Difference]: Without dead ends: 53 [2021-10-11 02:29:34,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:29:34,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-11 02:29:34,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2021-10-11 02:29:34,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-10-11 02:29:34,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-10-11 02:29:34,563 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 7 [2021-10-11 02:29:34,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:34,563 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-10-11 02:29:34,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:29:34,563 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-10-11 02:29:34,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:29:34,564 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:34,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:29:34,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:34,786 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:34,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:34,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1442287066, now seen corresponding path program 1 times [2021-10-11 02:29:34,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:34,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341386930] [2021-10-11 02:29:34,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:34,791 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:29:34,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510455773] [2021-10-11 02:29:34,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cb330-b39d-4557-bc94-1ea38b9826e7/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:34,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-11 02:29:34,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:29:34,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:34,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:29:34,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:34,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341386930] [2021-10-11 02:29:34,907 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:29:34,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510455773] [2021-10-11 02:29:34,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:34,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-11 02:29:34,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221469453] [2021-10-11 02:29:34,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:29:34,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:34,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:29:34,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:29:34,910 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 5 states. [2021-10-11 02:29:34,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:34,947 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2021-10-11 02:29:34,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:29:34,947 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-10-11 02:29:34,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:34,948 INFO L225 Difference]: With dead ends: 48 [2021-10-11 02:29:34,948 INFO L226 Difference]: Without dead ends: 18 [2021-10-11 02:29:34,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:29:34,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-11 02:29:34,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-11 02:29:34,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-11 02:29:34,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-10-11 02:29:34,952 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2021-10-11 02:29:34,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:34,953 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-10-11 02:29:34,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:29:34,953 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-10-11 02:29:34,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:29:34,954 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:34,954 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:29:35,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:35,169 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:35,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:35,169 INFO L82 PathProgramCache]: Analyzing trace with hash 971784697, now seen corresponding path program 1 times [2021-10-11 02:29:35,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:35,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103971648] [2021-10-11 02:29:35,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:35,175 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:29:35,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [914497915] [2021-10-11 02:29:35,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cb330-b39d-4557-bc94-1ea38b9826e7/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:29:35,259 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:29:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:29:35,274 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:29:35,325 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:29:35,325 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:29:35,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:35,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:29:35 BoogieIcfgContainer [2021-10-11 02:29:35,568 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:29:35,569 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:29:35,569 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:29:35,569 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:29:35,570 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:33" (3/4) ... [2021-10-11 02:29:35,575 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:29:35,631 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cb330-b39d-4557-bc94-1ea38b9826e7/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:29:35,631 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:29:35,633 INFO L168 Benchmark]: Toolchain (without parser) took 3545.91 ms. Allocated memory is still 104.9 MB. Free memory was 67.6 MB in the beginning and 46.7 MB in the end (delta: 20.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:35,634 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 104.9 MB. Free memory is still 85.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:29:35,635 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.10 ms. Allocated memory is still 104.9 MB. Free memory was 67.4 MB in the beginning and 81.0 MB in the end (delta: -13.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:35,635 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.87 ms. Allocated memory is still 104.9 MB. Free memory was 81.0 MB in the beginning and 79.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:35,636 INFO L168 Benchmark]: Boogie Preprocessor took 26.26 ms. Allocated memory is still 104.9 MB. Free memory was 79.2 MB in the beginning and 78.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:35,637 INFO L168 Benchmark]: RCFGBuilder took 671.74 ms. Allocated memory is still 104.9 MB. Free memory was 77.6 MB in the beginning and 48.7 MB in the end (delta: 29.0 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:35,637 INFO L168 Benchmark]: TraceAbstraction took 2428.72 ms. Allocated memory is still 104.9 MB. Free memory was 48.3 MB in the beginning and 49.5 MB in the end (delta: -1.2 MB). Peak memory consumption was 1.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:35,638 INFO L168 Benchmark]: Witness Printer took 62.58 ms. Allocated memory is still 104.9 MB. Free memory was 49.5 MB in the beginning and 46.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:35,641 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 104.9 MB. Free memory is still 85.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 308.10 ms. Allocated memory is still 104.9 MB. Free memory was 67.4 MB in the beginning and 81.0 MB in the end (delta: -13.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.87 ms. Allocated memory is still 104.9 MB. Free memory was 81.0 MB in the beginning and 79.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.26 ms. Allocated memory is still 104.9 MB. Free memory was 79.2 MB in the beginning and 78.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 671.74 ms. Allocated memory is still 104.9 MB. Free memory was 77.6 MB in the beginning and 48.7 MB in the end (delta: 29.0 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2428.72 ms. Allocated memory is still 104.9 MB. Free memory was 48.3 MB in the beginning and 49.5 MB in the end (delta: -1.2 MB). Peak memory consumption was 1.3 MB. Max. memory is 16.1 GB. * Witness Printer took 62.58 ms. Allocated memory is still 104.9 MB. Free memory was 49.5 MB in the beginning and 46.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.3s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 108 SDtfs, 43 SDslu, 97 SDs, 0 SdLazy, 33 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 19 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 504 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! Received shutdown request...