./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd-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_84643b23-fe5a-45eb-83b2-1d763c23918a/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_84643b23-fe5a-45eb-83b2-1d763c23918a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_84643b23-fe5a-45eb-83b2-1d763c23918a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_84643b23-fe5a-45eb-83b2-1d763c23918a/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_84643b23-fe5a-45eb-83b2-1d763c23918a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_84643b23-fe5a-45eb-83b2-1d763c23918a/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 3e8b2633622084f06b754f22cb180cb188cb0d4f .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 21:28:55,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 21:28:55,345 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 21:28:55,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 21:28:55,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 21:28:55,421 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 21:28:55,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 21:28:55,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 21:28:55,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 21:28:55,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 21:28:55,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 21:28:55,444 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 21:28:55,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 21:28:55,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 21:28:55,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 21:28:55,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 21:28:55,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 21:28:55,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 21:28:55,462 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 21:28:55,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 21:28:55,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 21:28:55,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 21:28:55,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 21:28:55,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 21:28:55,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 21:28:55,488 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 21:28:55,489 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 21:28:55,491 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 21:28:55,492 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 21:28:55,493 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 21:28:55,494 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 21:28:55,495 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 21:28:55,497 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 21:28:55,499 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 21:28:55,500 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 21:28:55,501 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 21:28:55,502 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 21:28:55,502 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 21:28:55,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 21:28:55,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 21:28:55,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 21:28:55,509 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_84643b23-fe5a-45eb-83b2-1d763c23918a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 21:28:55,552 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 21:28:55,553 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 21:28:55,555 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 21:28:55,555 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 21:28:55,555 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 21:28:55,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 21:28:55,556 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 21:28:55,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 21:28:55,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 21:28:55,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 21:28:55,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 21:28:55,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 21:28:55,558 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 21:28:55,558 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 21:28:55,558 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 21:28:55,558 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 21:28:55,559 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 21:28:55,559 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 21:28:55,559 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 21:28:55,559 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 21:28:55,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 21:28:55,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 21:28:55,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 21:28:55,560 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 21:28:55,560 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 21:28:55,560 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 21:28:55,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 21:28:55,561 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 21:28:55,561 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 21:28:55,561 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_84643b23-fe5a-45eb-83b2-1d763c23918a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_84643b23-fe5a-45eb-83b2-1d763c23918a/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e8b2633622084f06b754f22cb180cb188cb0d4f [2020-11-29 21:28:55,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 21:28:55,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 21:28:55,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 21:28:55,989 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 21:28:55,990 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 21:28:55,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_84643b23-fe5a-45eb-83b2-1d763c23918a/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound1.c [2020-11-29 21:28:56,070 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_84643b23-fe5a-45eb-83b2-1d763c23918a/bin/uautomizer/data/fdb3420b2/5d78800ae9b24daf988caa59a3613a7d/FLAG218d90d7d [2020-11-29 21:28:56,578 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 21:28:56,579 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_84643b23-fe5a-45eb-83b2-1d763c23918a/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound1.c [2020-11-29 21:28:56,602 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_84643b23-fe5a-45eb-83b2-1d763c23918a/bin/uautomizer/data/fdb3420b2/5d78800ae9b24daf988caa59a3613a7d/FLAG218d90d7d [2020-11-29 21:28:56,960 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_84643b23-fe5a-45eb-83b2-1d763c23918a/bin/uautomizer/data/fdb3420b2/5d78800ae9b24daf988caa59a3613a7d [2020-11-29 21:28:56,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 21:28:56,966 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 21:28:56,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 21:28:56,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 21:28:56,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 21:28:56,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:28:56" (1/1) ... [2020-11-29 21:28:56,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13e887aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:28:56, skipping insertion in model container [2020-11-29 21:28:56,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:28:56" (1/1) ... [2020-11-29 21:28:56,990 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 21:28:57,014 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 21:28:57,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:28:57,304 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 21:28:57,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:28:57,343 INFO L208 MainTranslator]: Completed translation [2020-11-29 21:28:57,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:28:57 WrapperNode [2020-11-29 21:28:57,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 21:28:57,347 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 21:28:57,347 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 21:28:57,348 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 21:28:57,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:28:57" (1/1) ... [2020-11-29 21:28:57,368 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:28:57" (1/1) ... [2020-11-29 21:28:57,404 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 21:28:57,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 21:28:57,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 21:28:57,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 21:28:57,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:28:57" (1/1) ... [2020-11-29 21:28:57,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:28:57" (1/1) ... [2020-11-29 21:28:57,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:28:57" (1/1) ... [2020-11-29 21:28:57,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:28:57" (1/1) ... [2020-11-29 21:28:57,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:28:57" (1/1) ... [2020-11-29 21:28:57,448 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:28:57" (1/1) ... [2020-11-29 21:28:57,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:28:57" (1/1) ... [2020-11-29 21:28:57,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 21:28:57,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 21:28:57,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 21:28:57,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 21:28:57,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:28:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_84643b23-fe5a-45eb-83b2-1d763c23918a/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 21:28:57,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 21:28:57,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 21:28:57,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 21:28:57,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 21:28:57,972 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 21:28:57,974 INFO L298 CfgBuilder]: Removed 37 assume(true) statements. [2020-11-29 21:28:57,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:28:57 BoogieIcfgContainer [2020-11-29 21:28:57,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 21:28:57,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 21:28:57,986 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 21:28:57,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 21:28:57,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 09:28:56" (1/3) ... [2020-11-29 21:28:57,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7005f942 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:28:57, skipping insertion in model container [2020-11-29 21:28:57,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:28:57" (2/3) ... [2020-11-29 21:28:57,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7005f942 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:28:57, skipping insertion in model container [2020-11-29 21:28:57,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:28:57" (3/3) ... [2020-11-29 21:28:57,994 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound1.c [2020-11-29 21:28:58,006 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 21:28:58,010 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-11-29 21:28:58,023 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-11-29 21:28:58,048 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 21:28:58,048 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 21:28:58,048 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 21:28:58,049 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 21:28:58,049 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 21:28:58,049 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 21:28:58,049 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 21:28:58,049 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 21:28:58,069 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-11-29 21:28:58,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 21:28:58,073 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:28:58,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:28:58,074 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:28:58,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:28:58,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1236199694, now seen corresponding path program 1 times [2020-11-29 21:28:58,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:28:58,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867714768] [2020-11-29 21:28:58,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:28:58,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:28:58,246 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 21:28:58,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867714768] [2020-11-29 21:28:58,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:28:58,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 21:28:58,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395551030] [2020-11-29 21:28:58,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 21:28:58,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:28:58,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 21:28:58,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 21:28:58,281 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2020-11-29 21:28:58,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:28:58,313 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2020-11-29 21:28:58,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 21:28:58,315 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-11-29 21:28:58,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:28:58,325 INFO L225 Difference]: With dead ends: 79 [2020-11-29 21:28:58,326 INFO L226 Difference]: Without dead ends: 37 [2020-11-29 21:28:58,331 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 21:28:58,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-29 21:28:58,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-11-29 21:28:58,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-29 21:28:58,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-11-29 21:28:58,386 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 10 [2020-11-29 21:28:58,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:28:58,387 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-11-29 21:28:58,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 21:28:58,388 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-11-29 21:28:58,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 21:28:58,389 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:28:58,389 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:28:58,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 21:28:58,393 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:28:58,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:28:58,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2020-11-29 21:28:58,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:28:58,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586995100] [2020-11-29 21:28:58,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:28:58,461 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 21:28:58,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993855577] [2020-11-29 21:28:58,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_84643b23-fe5a-45eb-83b2-1d763c23918a/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 21:28:58,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:28:58,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 21:28:58,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:28:58,682 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 21:28:58,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586995100] [2020-11-29 21:28:58,683 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 21:28:58,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993855577] [2020-11-29 21:28:58,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:28:58,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 21:28:58,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035371290] [2020-11-29 21:28:58,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 21:28:58,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:28:58,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 21:28:58,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 21:28:58,687 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 4 states. [2020-11-29 21:28:58,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:28:58,867 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-11-29 21:28:58,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 21:28:58,869 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-29 21:28:58,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:28:58,872 INFO L225 Difference]: With dead ends: 68 [2020-11-29 21:28:58,872 INFO L226 Difference]: Without dead ends: 64 [2020-11-29 21:28:58,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 21:28:58,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-29 21:28:58,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 51. [2020-11-29 21:28:58,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-29 21:28:58,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2020-11-29 21:28:58,892 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 10 [2020-11-29 21:28:58,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:28:58,893 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2020-11-29 21:28:58,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 21:28:58,894 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2020-11-29 21:28:58,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 21:28:58,896 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:28:58,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:28:59,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-29 21:28:59,119 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:28:59,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:28:59,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1507399260, now seen corresponding path program 1 times [2020-11-29 21:28:59,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:28:59,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388284956] [2020-11-29 21:28:59,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:28:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:28:59,296 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 21:28:59,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388284956] [2020-11-29 21:28:59,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:28:59,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:28:59,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455583624] [2020-11-29 21:28:59,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 21:28:59,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:28:59,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 21:28:59,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 21:28:59,299 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 4 states. [2020-11-29 21:28:59,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:28:59,335 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2020-11-29 21:28:59,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 21:28:59,337 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-29 21:28:59,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:28:59,339 INFO L225 Difference]: With dead ends: 65 [2020-11-29 21:28:59,339 INFO L226 Difference]: Without dead ends: 51 [2020-11-29 21:28:59,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 21:28:59,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-29 21:28:59,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-11-29 21:28:59,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-29 21:28:59,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-11-29 21:28:59,349 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 11 [2020-11-29 21:28:59,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:28:59,350 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-11-29 21:28:59,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 21:28:59,350 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-11-29 21:28:59,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 21:28:59,351 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:28:59,351 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:28:59,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 21:28:59,352 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:28:59,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:28:59,352 INFO L82 PathProgramCache]: Analyzing trace with hash 515848209, now seen corresponding path program 1 times [2020-11-29 21:28:59,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:28:59,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76362698] [2020-11-29 21:28:59,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:28:59,395 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 21:28:59,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [185305216] [2020-11-29 21:28:59,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_84643b23-fe5a-45eb-83b2-1d763c23918a/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 21:28:59,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:28:59,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 21:28:59,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:28:59,493 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 21:28:59,494 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:28:59,553 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 21:28:59,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76362698] [2020-11-29 21:28:59,553 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 21:28:59,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185305216] [2020-11-29 21:28:59,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:28:59,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 21:28:59,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836999427] [2020-11-29 21:28:59,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 21:28:59,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:28:59,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 21:28:59,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-29 21:28:59,555 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 6 states. [2020-11-29 21:28:59,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:28:59,857 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2020-11-29 21:28:59,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 21:28:59,858 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-11-29 21:28:59,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:28:59,859 INFO L225 Difference]: With dead ends: 82 [2020-11-29 21:28:59,859 INFO L226 Difference]: Without dead ends: 80 [2020-11-29 21:28:59,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-29 21:28:59,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-11-29 21:28:59,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2020-11-29 21:28:59,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-29 21:28:59,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2020-11-29 21:28:59,871 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 12 [2020-11-29 21:28:59,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:28:59,872 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2020-11-29 21:28:59,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 21:28:59,872 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2020-11-29 21:28:59,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 21:28:59,873 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:28:59,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:29:00,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:29:00,096 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:29:00,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:29:00,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1809076980, now seen corresponding path program 1 times [2020-11-29 21:29:00,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:29:00,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125281521] [2020-11-29 21:29:00,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:29:00,111 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 21:29:00,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359987046] [2020-11-29 21:29:00,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_84643b23-fe5a-45eb-83b2-1d763c23918a/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 21:29:00,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:29:00,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 21:29:00,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:29:00,208 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 21:29:00,209 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:29:00,266 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 21:29:00,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125281521] [2020-11-29 21:29:00,267 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 21:29:00,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359987046] [2020-11-29 21:29:00,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:29:00,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 21:29:00,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168595505] [2020-11-29 21:29:00,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 21:29:00,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:29:00,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 21:29:00,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-29 21:29:00,269 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand 6 states. [2020-11-29 21:29:00,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:29:00,564 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2020-11-29 21:29:00,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 21:29:00,570 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-11-29 21:29:00,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:29:00,571 INFO L225 Difference]: With dead ends: 97 [2020-11-29 21:29:00,571 INFO L226 Difference]: Without dead ends: 89 [2020-11-29 21:29:00,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-29 21:29:00,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-29 21:29:00,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-11-29 21:29:00,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-29 21:29:00,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2020-11-29 21:29:00,594 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 14 [2020-11-29 21:29:00,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:29:00,594 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2020-11-29 21:29:00,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 21:29:00,595 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2020-11-29 21:29:00,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 21:29:00,596 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:29:00,601 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:29:00,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:29:00,812 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:29:00,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:29:00,812 INFO L82 PathProgramCache]: Analyzing trace with hash 968565783, now seen corresponding path program 1 times [2020-11-29 21:29:00,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:29:00,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723661652] [2020-11-29 21:29:00,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:29:00,824 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 21:29:00,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586511708] [2020-11-29 21:29:00,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_84643b23-fe5a-45eb-83b2-1d763c23918a/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 21:29:00,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:29:00,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 21:29:00,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:29:00,894 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 21:29:00,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723661652] [2020-11-29 21:29:00,894 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 21:29:00,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586511708] [2020-11-29 21:29:00,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:29:00,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 21:29:00,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095487071] [2020-11-29 21:29:00,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 21:29:00,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:29:00,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 21:29:00,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 21:29:00,896 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand 4 states. [2020-11-29 21:29:00,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:29:00,997 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2020-11-29 21:29:00,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 21:29:00,998 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-11-29 21:29:00,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:29:00,999 INFO L225 Difference]: With dead ends: 96 [2020-11-29 21:29:00,999 INFO L226 Difference]: Without dead ends: 94 [2020-11-29 21:29:01,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 21:29:01,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-11-29 21:29:01,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 78. [2020-11-29 21:29:01,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-29 21:29:01,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2020-11-29 21:29:01,013 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 17 [2020-11-29 21:29:01,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:29:01,013 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2020-11-29 21:29:01,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 21:29:01,014 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2020-11-29 21:29:01,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 21:29:01,014 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:29:01,015 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:29:01,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:29:01,232 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:29:01,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:29:01,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1215997382, now seen corresponding path program 1 times [2020-11-29 21:29:01,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:29:01,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687117995] [2020-11-29 21:29:01,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:29:01,251 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 21:29:01,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [981611822] [2020-11-29 21:29:01,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_84643b23-fe5a-45eb-83b2-1d763c23918a/bin/uautomizer/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 [2020-11-29 21:29:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:29:01,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 21:29:01,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:29:01,341 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 21:29:01,342 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:29:01,398 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 21:29:01,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687117995] [2020-11-29 21:29:01,399 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 21:29:01,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981611822] [2020-11-29 21:29:01,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:29:01,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 21:29:01,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889085736] [2020-11-29 21:29:01,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 21:29:01,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:29:01,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 21:29:01,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-29 21:29:01,401 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 6 states. [2020-11-29 21:29:01,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:29:01,879 INFO L93 Difference]: Finished difference Result 119 states and 135 transitions. [2020-11-29 21:29:01,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 21:29:01,880 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-11-29 21:29:01,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:29:01,881 INFO L225 Difference]: With dead ends: 119 [2020-11-29 21:29:01,882 INFO L226 Difference]: Without dead ends: 111 [2020-11-29 21:29:01,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-11-29 21:29:01,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-11-29 21:29:01,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 73. [2020-11-29 21:29:01,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-29 21:29:01,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2020-11-29 21:29:01,908 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 19 [2020-11-29 21:29:01,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:29:01,909 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2020-11-29 21:29:01,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 21:29:01,909 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2020-11-29 21:29:01,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 21:29:01,910 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:29:01,910 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:29:02,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-29 21:29:02,124 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:29:02,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:29:02,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1167171917, now seen corresponding path program 1 times [2020-11-29 21:29:02,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:29:02,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738180128] [2020-11-29 21:29:02,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:29:02,149 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 21:29:02,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627415326] [2020-11-29 21:29:02,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_84643b23-fe5a-45eb-83b2-1d763c23918a/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:29:02,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:29:02,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 21:29:02,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:29:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:29:02,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738180128] [2020-11-29 21:29:02,255 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 21:29:02,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627415326] [2020-11-29 21:29:02,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 21:29:02,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-11-29 21:29:02,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282251331] [2020-11-29 21:29:02,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 21:29:02,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:29:02,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 21:29:02,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 21:29:02,258 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 5 states. [2020-11-29 21:29:02,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:29:02,299 INFO L93 Difference]: Finished difference Result 100 states and 115 transitions. [2020-11-29 21:29:02,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 21:29:02,300 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-11-29 21:29:02,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:29:02,301 INFO L225 Difference]: With dead ends: 100 [2020-11-29 21:29:02,301 INFO L226 Difference]: Without dead ends: 41 [2020-11-29 21:29:02,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 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 21:29:02,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-29 21:29:02,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-11-29 21:29:02,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-29 21:29:02,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-11-29 21:29:02,312 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 19 [2020-11-29 21:29:02,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:29:02,319 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-11-29 21:29:02,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 21:29:02,319 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-11-29 21:29:02,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 21:29:02,320 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:29:02,320 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 21:29:02,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:29:02,521 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:29:02,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:29:02,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1822603905, now seen corresponding path program 1 times [2020-11-29 21:29:02,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:29:02,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239727840] [2020-11-29 21:29:02,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:29:02,534 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 21:29:02,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217554899] [2020-11-29 21:29:02,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_84643b23-fe5a-45eb-83b2-1d763c23918a/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:29:02,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:29:02,596 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:29:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:29:02,623 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:29:02,665 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:29:02,665 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 21:29:02,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:29:02,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 09:29:02 BoogieIcfgContainer [2020-11-29 21:29:02,925 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 21:29:02,926 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 21:29:02,926 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 21:29:02,926 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 21:29:02,926 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:28:57" (3/4) ... [2020-11-29 21:29:02,928 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 21:29:02,990 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_84643b23-fe5a-45eb-83b2-1d763c23918a/bin/uautomizer/witness.graphml [2020-11-29 21:29:02,991 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 21:29:02,993 INFO L168 Benchmark]: Toolchain (without parser) took 6025.22 ms. Allocated memory was 127.9 MB in the beginning and 165.7 MB in the end (delta: 37.7 MB). Free memory was 95.9 MB in the beginning and 89.3 MB in the end (delta: 6.6 MB). Peak memory consumption was 44.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:29:02,993 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 83.9 MB. Free memory was 44.6 MB in the beginning and 44.6 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:29:02,994 INFO L168 Benchmark]: CACSL2BoogieTranslator took 374.90 ms. Allocated memory is still 127.9 MB. Free memory was 95.6 MB in the beginning and 104.0 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 21:29:02,995 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.40 ms. Allocated memory is still 127.9 MB. Free memory was 104.0 MB in the beginning and 102.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:29:02,995 INFO L168 Benchmark]: Boogie Preprocessor took 55.33 ms. Allocated memory is still 127.9 MB. Free memory was 102.3 MB in the beginning and 101.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:29:02,996 INFO L168 Benchmark]: RCFGBuilder took 522.70 ms. Allocated memory is still 127.9 MB. Free memory was 101.2 MB in the beginning and 84.4 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-29 21:29:02,997 INFO L168 Benchmark]: TraceAbstraction took 4940.20 ms. Allocated memory was 127.9 MB in the beginning and 165.7 MB in the end (delta: 37.7 MB). Free memory was 83.9 MB in the beginning and 91.4 MB in the end (delta: -7.4 MB). Peak memory consumption was 32.4 MB. Max. memory is 16.1 GB. [2020-11-29 21:29:02,997 INFO L168 Benchmark]: Witness Printer took 65.04 ms. Allocated memory is still 165.7 MB. Free memory was 91.4 MB in the beginning and 89.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:29:03,001 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 83.9 MB. Free memory was 44.6 MB in the beginning and 44.6 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 374.90 ms. Allocated memory is still 127.9 MB. Free memory was 95.6 MB in the beginning and 104.0 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 57.40 ms. Allocated memory is still 127.9 MB. Free memory was 104.0 MB in the beginning and 102.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 55.33 ms. Allocated memory is still 127.9 MB. Free memory was 102.3 MB in the beginning and 101.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 522.70 ms. Allocated memory is still 127.9 MB. Free memory was 101.2 MB in the beginning and 84.4 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4940.20 ms. Allocated memory was 127.9 MB in the beginning and 165.7 MB in the end (delta: 37.7 MB). Free memory was 83.9 MB in the beginning and 91.4 MB in the end (delta: -7.4 MB). Peak memory consumption was 32.4 MB. Max. memory is 16.1 GB. * Witness Printer took 65.04 ms. Allocated memory is still 165.7 MB. Free memory was 91.4 MB in the beginning and 89.3 MB in the end (delta: 2.1 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: 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] long long a, b, p, q, r, s; [L21] int x, y; [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 VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<1 [L11] COND FALSE !(!(cond)) VAL [counter=1] [L11] COND FALSE !(!(cond)) VAL [counter=1] [L11] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(a != b)) VAL [counter=1] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [counter=1] [L34] EXPR counter++ VAL [counter=2] [L34] COND FALSE !(counter++<1) [L11] COND TRUE !(cond) VAL [counter=2] [L4] __assert_fail("0", "egcd-ll.c", 4, "reach_error") VAL [counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.8s, OverallIterations: 9, TraceHistogramMax: 2, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 279 SDtfs, 342 SDslu, 394 SDs, 0 SdLazy, 344 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 102 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 102 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 132 NumberOfCodeBlocks, 132 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 5804 SizeOfPredicates, 39 NumberOfNonLiveVariables, 532 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 8 InterpolantComputations, 7 PerfectInterpolantSequences, 2/3 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...