./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c3f038e9-043c-4724-9b28-9a9f22064a83/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c3f038e9-043c-4724-9b28-9a9f22064a83/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c3f038e9-043c-4724-9b28-9a9f22064a83/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c3f038e9-043c-4724-9b28-9a9f22064a83/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c3f038e9-043c-4724-9b28-9a9f22064a83/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c3f038e9-043c-4724-9b28-9a9f22064a83/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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-a4ecdab [2020-11-29 23:57:20,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 23:57:20,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 23:57:20,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 23:57:20,354 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 23:57:20,361 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 23:57:20,365 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 23:57:20,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 23:57:20,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 23:57:20,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 23:57:20,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 23:57:20,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 23:57:20,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 23:57:20,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 23:57:20,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 23:57:20,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 23:57:20,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 23:57:20,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 23:57:20,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 23:57:20,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 23:57:20,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 23:57:20,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 23:57:20,402 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 23:57:20,404 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 23:57:20,407 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 23:57:20,407 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 23:57:20,408 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 23:57:20,409 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 23:57:20,410 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 23:57:20,411 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 23:57:20,411 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 23:57:20,412 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 23:57:20,413 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 23:57:20,414 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 23:57:20,416 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 23:57:20,416 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 23:57:20,417 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 23:57:20,417 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 23:57:20,418 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 23:57:20,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 23:57:20,420 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 23:57:20,421 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c3f038e9-043c-4724-9b28-9a9f22064a83/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 23:57:20,448 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 23:57:20,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 23:57:20,456 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 23:57:20,457 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 23:57:20,457 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 23:57:20,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 23:57:20,458 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 23:57:20,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 23:57:20,458 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 23:57:20,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 23:57:20,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 23:57:20,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 23:57:20,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 23:57:20,460 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 23:57:20,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 23:57:20,461 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 23:57:20,461 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 23:57:20,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 23:57:20,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 23:57:20,462 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 23:57:20,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 23:57:20,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:57:20,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 23:57:20,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 23:57:20,463 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 23:57:20,463 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 23:57:20,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 23:57:20,463 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 23:57:20,464 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 23:57:20,464 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_c3f038e9-043c-4724-9b28-9a9f22064a83/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c3f038e9-043c-4724-9b28-9a9f22064a83/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e96b4706a15a135b751d9dcfc9eb745ce848cd1b [2020-11-29 23:57:20,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 23:57:20,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 23:57:20,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 23:57:20,806 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 23:57:20,807 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 23:57:20,808 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c3f038e9-043c-4724-9b28-9a9f22064a83/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound1.c [2020-11-29 23:57:20,906 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c3f038e9-043c-4724-9b28-9a9f22064a83/bin/uautomizer/data/d2aa2015d/cdf0d5a71de143ecb4d0eac703342367/FLAGdc46c133e [2020-11-29 23:57:21,399 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 23:57:21,399 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c3f038e9-043c-4724-9b28-9a9f22064a83/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound1.c [2020-11-29 23:57:21,407 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c3f038e9-043c-4724-9b28-9a9f22064a83/bin/uautomizer/data/d2aa2015d/cdf0d5a71de143ecb4d0eac703342367/FLAGdc46c133e [2020-11-29 23:57:21,756 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c3f038e9-043c-4724-9b28-9a9f22064a83/bin/uautomizer/data/d2aa2015d/cdf0d5a71de143ecb4d0eac703342367 [2020-11-29 23:57:21,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 23:57:21,759 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 23:57:21,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 23:57:21,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 23:57:21,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 23:57:21,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:57:21" (1/1) ... [2020-11-29 23:57:21,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41568961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:57:21, skipping insertion in model container [2020-11-29 23:57:21,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:57:21" (1/1) ... [2020-11-29 23:57:21,787 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 23:57:21,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 23:57:22,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:57:22,071 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 23:57:22,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:57:22,107 INFO L208 MainTranslator]: Completed translation [2020-11-29 23:57:22,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:57:22 WrapperNode [2020-11-29 23:57:22,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 23:57:22,109 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 23:57:22,109 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 23:57:22,110 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 23:57:22,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:57:22" (1/1) ... [2020-11-29 23:57:22,124 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:57:22" (1/1) ... [2020-11-29 23:57:22,148 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 23:57:22,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 23:57:22,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 23:57:22,150 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 23:57:22,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:57:22" (1/1) ... [2020-11-29 23:57:22,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:57:22" (1/1) ... [2020-11-29 23:57:22,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:57:22" (1/1) ... [2020-11-29 23:57:22,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:57:22" (1/1) ... [2020-11-29 23:57:22,167 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:57:22" (1/1) ... [2020-11-29 23:57:22,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:57:22" (1/1) ... [2020-11-29 23:57:22,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:57:22" (1/1) ... [2020-11-29 23:57:22,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 23:57:22,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 23:57:22,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 23:57:22,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 23:57:22,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:57:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3f038e9-043c-4724-9b28-9a9f22064a83/bin/uautomizer/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 [2020-11-29 23:57:22,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 23:57:22,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 23:57:22,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 23:57:22,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 23:57:22,660 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 23:57:22,660 INFO L298 CfgBuilder]: Removed 38 assume(true) statements. [2020-11-29 23:57:22,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:57:22 BoogieIcfgContainer [2020-11-29 23:57:22,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 23:57:22,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 23:57:22,664 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 23:57:22,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 23:57:22,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 11:57:21" (1/3) ... [2020-11-29 23:57:22,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@518001c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:57:22, skipping insertion in model container [2020-11-29 23:57:22,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:57:22" (2/3) ... [2020-11-29 23:57:22,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@518001c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:57:22, skipping insertion in model container [2020-11-29 23:57:22,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:57:22" (3/3) ... [2020-11-29 23:57:22,688 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound1.c [2020-11-29 23:57:22,700 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 23:57:22,704 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-11-29 23:57:22,716 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-11-29 23:57:22,741 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 23:57:22,741 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 23:57:22,742 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 23:57:22,742 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 23:57:22,742 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 23:57:22,742 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 23:57:22,742 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 23:57:22,742 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 23:57:22,757 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-11-29 23:57:22,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 23:57:22,764 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:57:22,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:57:22,766 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]=== [2020-11-29 23:57:22,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:57:22,772 INFO L82 PathProgramCache]: Analyzing trace with hash -141659761, now seen corresponding path program 1 times [2020-11-29 23:57:22,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:57:22,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094226639] [2020-11-29 23:57:22,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:57:22,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:57:22,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:57:22,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094226639] [2020-11-29 23:57:22,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:57:22,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 23:57:22,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801391639] [2020-11-29 23:57:22,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 23:57:22,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:57:23,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 23:57:23,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 23:57:23,012 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2020-11-29 23:57:23,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:57:23,034 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2020-11-29 23:57:23,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 23:57:23,035 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-11-29 23:57:23,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:57:23,043 INFO L225 Difference]: With dead ends: 83 [2020-11-29 23:57:23,043 INFO L226 Difference]: Without dead ends: 39 [2020-11-29 23:57:23,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 23:57:23,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-29 23:57:23,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-11-29 23:57:23,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-29 23:57:23,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-11-29 23:57:23,083 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 13 [2020-11-29 23:57:23,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:57:23,083 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-11-29 23:57:23,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 23:57:23,084 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-11-29 23:57:23,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 23:57:23,084 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:57:23,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:57:23,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 23:57:23,085 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]=== [2020-11-29 23:57:23,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:57:23,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1057766562, now seen corresponding path program 1 times [2020-11-29 23:57:23,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:57:23,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741423713] [2020-11-29 23:57:23,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:57:23,104 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:57:23,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2134189324] [2020-11-29 23:57:23,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3f038e9-043c-4724-9b28-9a9f22064a83/bin/uautomizer/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 [2020-11-29 23:57:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:57:23,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 23:57:23,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:57:23,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:57:23,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741423713] [2020-11-29 23:57:23,313 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:57:23,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134189324] [2020-11-29 23:57:23,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:57:23,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:57:23,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460362903] [2020-11-29 23:57:23,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:57:23,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:57:23,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:57:23,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:57:23,316 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 4 states. [2020-11-29 23:57:23,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:57:23,348 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-11-29 23:57:23,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:57:23,348 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-29 23:57:23,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:57:23,349 INFO L225 Difference]: With dead ends: 49 [2020-11-29 23:57:23,350 INFO L226 Difference]: Without dead ends: 41 [2020-11-29 23:57:23,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:57:23,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-29 23:57:23,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-11-29 23:57:23,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-29 23:57:23,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-11-29 23:57:23,361 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 14 [2020-11-29 23:57:23,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:57:23,362 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-11-29 23:57:23,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:57:23,363 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-11-29 23:57:23,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 23:57:23,364 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:57:23,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:57:23,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-29 23:57:23,591 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]=== [2020-11-29 23:57:23,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:57:23,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1568674210, now seen corresponding path program 1 times [2020-11-29 23:57:23,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:57:23,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005450919] [2020-11-29 23:57:23,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:57:23,611 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:57:23,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968613666] [2020-11-29 23:57:23,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3f038e9-043c-4724-9b28-9a9f22064a83/bin/uautomizer/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 [2020-11-29 23:57:23,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:57:23,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 23:57:23,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:57:23,729 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 23:57:23,730 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:57:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:57:23,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005450919] [2020-11-29 23:57:23,752 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:57:23,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968613666] [2020-11-29 23:57:23,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:57:23,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 23:57:23,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021070103] [2020-11-29 23:57:23,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 23:57:23,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:57:23,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:57:23,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:57:23,755 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 5 states. [2020-11-29 23:57:24,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:57:24,169 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2020-11-29 23:57:24,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 23:57:24,171 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-11-29 23:57:24,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:57:24,172 INFO L225 Difference]: With dead ends: 69 [2020-11-29 23:57:24,172 INFO L226 Difference]: Without dead ends: 61 [2020-11-29 23:57:24,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:57:24,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-29 23:57:24,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2020-11-29 23:57:24,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-29 23:57:24,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-11-29 23:57:24,186 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 15 [2020-11-29 23:57:24,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:57:24,187 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-11-29 23:57:24,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 23:57:24,188 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-11-29 23:57:24,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 23:57:24,189 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:57:24,189 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:57:24,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:57:24,390 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]=== [2020-11-29 23:57:24,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:57:24,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1384108475, now seen corresponding path program 1 times [2020-11-29 23:57:24,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:57:24,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031157287] [2020-11-29 23:57:24,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:57:24,402 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:57:24,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318139957] [2020-11-29 23:57:24,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3f038e9-043c-4724-9b28-9a9f22064a83/bin/uautomizer/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 [2020-11-29 23:57:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:57:24,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 23:57:24,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:57:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:57:24,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031157287] [2020-11-29 23:57:24,517 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:57:24,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318139957] [2020-11-29 23:57:24,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:57:24,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:57:24,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009802661] [2020-11-29 23:57:24,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 23:57:24,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:57:24,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:57:24,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:57:24,519 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 5 states. [2020-11-29 23:57:24,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:57:24,569 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2020-11-29 23:57:24,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 23:57:24,573 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-11-29 23:57:24,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:57:24,574 INFO L225 Difference]: With dead ends: 56 [2020-11-29 23:57:24,574 INFO L226 Difference]: Without dead ends: 26 [2020-11-29 23:57:24,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:57:24,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-29 23:57:24,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-29 23:57:24,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-29 23:57:24,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-11-29 23:57:24,579 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 16 [2020-11-29 23:57:24,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:57:24,579 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-11-29 23:57:24,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 23:57:24,580 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-11-29 23:57:24,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 23:57:24,580 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:57:24,580 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:57:24,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:57:24,781 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]=== [2020-11-29 23:57:24,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:57:24,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1976639322, now seen corresponding path program 1 times [2020-11-29 23:57:24,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:57:24,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563527349] [2020-11-29 23:57:24,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:57:24,806 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:57:24,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746765281] [2020-11-29 23:57:24,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3f038e9-043c-4724-9b28-9a9f22064a83/bin/uautomizer/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 [2020-11-29 23:57:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:57:24,868 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:57:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:57:24,885 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:57:24,913 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:57:24,913 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 23:57:25,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:57:25,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 11:57:25 BoogieIcfgContainer [2020-11-29 23:57:25,169 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 23:57:25,170 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 23:57:25,170 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 23:57:25,170 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 23:57:25,171 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:57:22" (3/4) ... [2020-11-29 23:57:25,173 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 23:57:25,223 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c3f038e9-043c-4724-9b28-9a9f22064a83/bin/uautomizer/witness.graphml [2020-11-29 23:57:25,223 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 23:57:25,225 INFO L168 Benchmark]: Toolchain (without parser) took 3464.41 ms. Allocated memory is still 102.8 MB. Free memory was 71.2 MB in the beginning and 58.7 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. [2020-11-29 23:57:25,226 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 73.4 MB. Free memory was 35.2 MB in the beginning and 35.1 MB in the end (delta: 33.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:57:25,226 INFO L168 Benchmark]: CACSL2BoogieTranslator took 347.02 ms. Allocated memory is still 102.8 MB. Free memory was 71.0 MB in the beginning and 79.2 MB in the end (delta: -8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 23:57:25,227 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.32 ms. Allocated memory is still 102.8 MB. Free memory was 79.2 MB in the beginning and 77.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:57:25,228 INFO L168 Benchmark]: Boogie Preprocessor took 27.20 ms. Allocated memory is still 102.8 MB. Free memory was 77.1 MB in the beginning and 76.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:57:25,228 INFO L168 Benchmark]: RCFGBuilder took 484.98 ms. Allocated memory is still 102.8 MB. Free memory was 76.0 MB in the beginning and 58.2 MB in the end (delta: 17.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-29 23:57:25,229 INFO L168 Benchmark]: TraceAbstraction took 2505.17 ms. Allocated memory is still 102.8 MB. Free memory was 57.7 MB in the beginning and 61.5 MB in the end (delta: -3.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:57:25,229 INFO L168 Benchmark]: Witness Printer took 53.72 ms. Allocated memory is still 102.8 MB. Free memory was 61.5 MB in the beginning and 58.7 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 23:57:25,242 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 73.4 MB. Free memory was 35.2 MB in the beginning and 35.1 MB in the end (delta: 33.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 347.02 ms. Allocated memory is still 102.8 MB. Free memory was 71.0 MB in the beginning and 79.2 MB in the end (delta: -8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.32 ms. Allocated memory is still 102.8 MB. Free memory was 79.2 MB in the beginning and 77.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.20 ms. Allocated memory is still 102.8 MB. Free memory was 77.1 MB in the beginning and 76.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 484.98 ms. Allocated memory is still 102.8 MB. Free memory was 76.0 MB in the beginning and 58.2 MB in the end (delta: 17.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2505.17 ms. Allocated memory is still 102.8 MB. Free memory was 57.7 MB in the beginning and 61.5 MB in the end (delta: -3.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 53.72 ms. Allocated memory is still 102.8 MB. Free memory was 61.5 MB in the beginning and 58.7 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: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L18] int counter = 0; VAL [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) VAL [counter=0] [L8] COND FALSE !(!cond) VAL [counter=0] [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) VAL [counter=0] [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] [L4] __assert_fail("0", "egcd2-ll.c", 4, "reach_error") VAL [counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 43 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.3s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 137 SDtfs, 93 SDslu, 147 SDs, 0 SdLazy, 61 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=0, 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, 78 NumberOfCodeBlocks, 78 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 1776 SizeOfPredicates, 5 NumberOfNonLiveVariables, 291 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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...