./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound2.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_8b18101b-96fe-404c-8ad9-ea042428a25c/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_8b18101b-96fe-404c-8ad9-ea042428a25c/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_8b18101b-96fe-404c-8ad9-ea042428a25c/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_8b18101b-96fe-404c-8ad9-ea042428a25c/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_8b18101b-96fe-404c-8ad9-ea042428a25c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_8b18101b-96fe-404c-8ad9-ea042428a25c/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 136b155e37e2c6593adc196e1d46b83f5765a5c4 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 [2020-11-28 03:01:58,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:01:58,284 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:01:58,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:01:58,342 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:01:58,349 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:01:58,352 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:01:58,356 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:01:58,359 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:01:58,367 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:01:58,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:01:58,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:01:58,370 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:01:58,371 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:01:58,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:01:58,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:01:58,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:01:58,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:01:58,378 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:01:58,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:01:58,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:01:58,384 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:01:58,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:01:58,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:01:58,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:01:58,391 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:01:58,391 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:01:58,392 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:01:58,393 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:01:58,394 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:01:58,394 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:01:58,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:01:58,396 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:01:58,397 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:01:58,399 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:01:58,399 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:01:58,400 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:01:58,400 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:01:58,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:01:58,401 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:01:58,402 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:01:58,403 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_8b18101b-96fe-404c-8ad9-ea042428a25c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 03:01:58,428 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:01:58,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:01:58,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:01:58,432 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:01:58,433 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:01:58,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:01:58,433 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:01:58,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:01:58,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:01:58,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:01:58,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:01:58,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:01:58,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:01:58,436 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:01:58,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:01:58,436 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:01:58,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:01:58,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:01:58,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:01:58,437 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:01:58,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:01:58,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:01:58,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:01:58,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:01:58,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:01:58,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:01:58,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:01:58,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:01:58,439 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:01:58,440 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_8b18101b-96fe-404c-8ad9-ea042428a25c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_8b18101b-96fe-404c-8ad9-ea042428a25c/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 136b155e37e2c6593adc196e1d46b83f5765a5c4 [2020-11-28 03:01:58,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:01:58,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:01:58,821 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:01:58,823 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:01:58,824 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:01:58,825 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_8b18101b-96fe-404c-8ad9-ea042428a25c/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound2.c [2020-11-28 03:01:58,925 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8b18101b-96fe-404c-8ad9-ea042428a25c/bin/uautomizer/data/fb4fe8dd3/afc5c781a5fa472ba903c7ba6b28bf61/FLAGeec38e2b3 [2020-11-28 03:01:59,417 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:01:59,418 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_8b18101b-96fe-404c-8ad9-ea042428a25c/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound2.c [2020-11-28 03:01:59,425 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8b18101b-96fe-404c-8ad9-ea042428a25c/bin/uautomizer/data/fb4fe8dd3/afc5c781a5fa472ba903c7ba6b28bf61/FLAGeec38e2b3 [2020-11-28 03:01:59,782 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_8b18101b-96fe-404c-8ad9-ea042428a25c/bin/uautomizer/data/fb4fe8dd3/afc5c781a5fa472ba903c7ba6b28bf61 [2020-11-28 03:01:59,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:01:59,786 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:01:59,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:01:59,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:01:59,807 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:01:59,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:01:59" (1/1) ... [2020-11-28 03:01:59,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17efe7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:59, skipping insertion in model container [2020-11-28 03:01:59,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:01:59" (1/1) ... [2020-11-28 03:01:59,821 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:01:59,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:02:00,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:02:00,026 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:02:00,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:02:00,089 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:02:00,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:00 WrapperNode [2020-11-28 03:02:00,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:02:00,094 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:02:00,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:02:00,094 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:02:00,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:00" (1/1) ... [2020-11-28 03:02:00,124 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:00" (1/1) ... [2020-11-28 03:02:00,160 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:02:00,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:02:00,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:02:00,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:02:00,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:00" (1/1) ... [2020-11-28 03:02:00,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:00" (1/1) ... [2020-11-28 03:02:00,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:00" (1/1) ... [2020-11-28 03:02:00,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:00" (1/1) ... [2020-11-28 03:02:00,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:00" (1/1) ... [2020-11-28 03:02:00,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:00" (1/1) ... [2020-11-28 03:02:00,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:00" (1/1) ... [2020-11-28 03:02:00,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:02:00,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:02:00,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:02:00,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:02:00,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:00" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8b18101b-96fe-404c-8ad9-ea042428a25c/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 [2020-11-28 03:02:00,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:02:00,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:02:00,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:02:00,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:02:00,615 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:02:00,615 INFO L298 CfgBuilder]: Removed 27 assume(true) statements. [2020-11-28 03:02:00,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:02:00 BoogieIcfgContainer [2020-11-28 03:02:00,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:02:00,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:02:00,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:02:00,626 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:02:00,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:01:59" (1/3) ... [2020-11-28 03:02:00,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7810cf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:02:00, skipping insertion in model container [2020-11-28 03:02:00,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:00" (2/3) ... [2020-11-28 03:02:00,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7810cf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:02:00, skipping insertion in model container [2020-11-28 03:02:00,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:02:00" (3/3) ... [2020-11-28 03:02:00,629 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound2.c [2020-11-28 03:02:00,641 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:02:00,646 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-11-28 03:02:00,673 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-28 03:02:00,741 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:02:00,745 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:02:00,745 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:02:00,745 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:02:00,746 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:02:00,746 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:02:00,746 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:02:00,746 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:02:00,770 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-11-28 03:02:00,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 03:02:00,779 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:00,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:00,780 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:02:00,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:00,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1233739953, now seen corresponding path program 1 times [2020-11-28 03:02:00,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:00,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576926695] [2020-11-28 03:02:00,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:00,926 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:02:00,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1936900305] [2020-11-28 03:02:00,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8b18101b-96fe-404c-8ad9-ea042428a25c/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 [2020-11-28 03:02:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:01,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-28 03:02:01,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:02:01,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:01,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576926695] [2020-11-28 03:02:01,056 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:02:01,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936900305] [2020-11-28 03:02:01,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:02:01,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 03:02:01,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238835929] [2020-11-28 03:02:01,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 03:02:01,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:01,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 03:02:01,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 03:02:01,088 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-11-28 03:02:01,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:01,117 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2020-11-28 03:02:01,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 03:02:01,119 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-11-28 03:02:01,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:01,142 INFO L225 Difference]: With dead ends: 61 [2020-11-28 03:02:01,142 INFO L226 Difference]: Without dead ends: 28 [2020-11-28 03:02:01,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 03:02:01,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-28 03:02:01,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-28 03:02:01,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-28 03:02:01,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-11-28 03:02:01,195 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 10 [2020-11-28 03:02:01,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:01,195 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-11-28 03:02:01,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 03:02:01,196 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-11-28 03:02:01,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 03:02:01,197 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:01,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:01,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-11-28 03:02:01,412 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:02:01,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:01,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2020-11-28 03:02:01,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:01,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950836337] [2020-11-28 03:02:01,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:01,435 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:02:01,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1945359145] [2020-11-28 03:02:01,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8b18101b-96fe-404c-8ad9-ea042428a25c/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 [2020-11-28 03:02:01,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:01,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:02:01,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:02:03,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:02:09,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:09,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950836337] [2020-11-28 03:02:09,846 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:02:09,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945359145] [2020-11-28 03:02:09,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:02:09,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:02:09,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392732767] [2020-11-28 03:02:09,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:02:09,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:09,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:02:09,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:02:09,849 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2020-11-28 03:02:14,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:14,243 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2020-11-28 03:02:14,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:02:14,246 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-28 03:02:14,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:14,247 INFO L225 Difference]: With dead ends: 51 [2020-11-28 03:02:14,248 INFO L226 Difference]: Without dead ends: 49 [2020-11-28 03:02:14,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:02:14,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-28 03:02:14,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-11-28 03:02:14,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-28 03:02:14,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2020-11-28 03:02:14,257 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 10 [2020-11-28 03:02:14,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:14,257 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2020-11-28 03:02:14,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:02:14,258 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2020-11-28 03:02:14,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:02:14,258 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:14,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:14,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:02:14,472 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:02:14,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:14,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1507372449, now seen corresponding path program 1 times [2020-11-28 03:02:14,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:14,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145727924] [2020-11-28 03:02:14,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:14,481 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:02:14,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485281936] [2020-11-28 03:02:14,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8b18101b-96fe-404c-8ad9-ea042428a25c/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 [2020-11-28 03:02:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:14,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 03:02:14,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:02:14,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:14,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145727924] [2020-11-28 03:02:14,575 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:02:14,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485281936] [2020-11-28 03:02:14,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:02:14,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:02:14,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582566676] [2020-11-28 03:02:14,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:02:14,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:14,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:02:14,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:02:14,577 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand 4 states. [2020-11-28 03:02:14,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:14,615 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2020-11-28 03:02:14,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:02:14,618 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-28 03:02:14,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:14,619 INFO L225 Difference]: With dead ends: 44 [2020-11-28 03:02:14,620 INFO L226 Difference]: Without dead ends: 40 [2020-11-28 03:02:14,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:02:14,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-28 03:02:14,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-11-28 03:02:14,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-28 03:02:14,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-11-28 03:02:14,638 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 11 [2020-11-28 03:02:14,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:14,639 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-11-28 03:02:14,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:02:14,639 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-11-28 03:02:14,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 03:02:14,640 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:14,641 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:14,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:02:14,868 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:02:14,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:14,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1188453480, now seen corresponding path program 1 times [2020-11-28 03:02:14,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:14,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919090143] [2020-11-28 03:02:14,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:14,875 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:02:14,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [75149384] [2020-11-28 03:02:14,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8b18101b-96fe-404c-8ad9-ea042428a25c/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 [2020-11-28 03:02:14,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:14,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 03:02:14,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:02:14,985 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-28 03:02:14,985 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:02:15,043 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:02:15,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:15,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919090143] [2020-11-28 03:02:15,145 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:02:15,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75149384] [2020-11-28 03:02:15,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:02:15,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-28 03:02:15,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629429656] [2020-11-28 03:02:15,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:02:15,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:15,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:02:15,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:02:15,148 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 6 states. [2020-11-28 03:02:26,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:26,284 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2020-11-28 03:02:26,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:02:26,285 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-11-28 03:02:26,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:26,286 INFO L225 Difference]: With dead ends: 64 [2020-11-28 03:02:26,286 INFO L226 Difference]: Without dead ends: 54 [2020-11-28 03:02:26,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:02:26,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-28 03:02:26,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2020-11-28 03:02:26,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-28 03:02:26,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-11-28 03:02:26,296 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 13 [2020-11-28 03:02:26,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:26,296 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-11-28 03:02:26,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:02:26,297 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-11-28 03:02:26,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 03:02:26,297 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:26,297 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:26,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:02:26,512 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:02:26,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:26,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1139013242, now seen corresponding path program 1 times [2020-11-28 03:02:26,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:26,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023190626] [2020-11-28 03:02:26,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:26,522 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:02:26,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130203870] [2020-11-28 03:02:26,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8b18101b-96fe-404c-8ad9-ea042428a25c/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 [2020-11-28 03:02:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:26,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:02:26,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:02:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:26,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023190626] [2020-11-28 03:02:26,635 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:02:26,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130203870] [2020-11-28 03:02:26,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:02:26,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-28 03:02:26,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238997045] [2020-11-28 03:02:26,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:02:26,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:26,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:02:26,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:02:26,637 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 6 states. [2020-11-28 03:02:26,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:26,710 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2020-11-28 03:02:26,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:02:26,711 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-11-28 03:02:26,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:26,712 INFO L225 Difference]: With dead ends: 71 [2020-11-28 03:02:26,712 INFO L226 Difference]: Without dead ends: 40 [2020-11-28 03:02:26,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:02:26,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-28 03:02:26,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-11-28 03:02:26,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-28 03:02:26,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-11-28 03:02:26,722 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 18 [2020-11-28 03:02:26,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:26,723 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-11-28 03:02:26,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:02:26,723 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-11-28 03:02:26,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-28 03:02:26,724 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:26,724 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:26,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:02:26,936 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:02:26,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:26,936 INFO L82 PathProgramCache]: Analyzing trace with hash -338682291, now seen corresponding path program 1 times [2020-11-28 03:02:26,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:26,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573720956] [2020-11-28 03:02:26,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:26,944 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:02:26,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [934759938] [2020-11-28 03:02:26,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8b18101b-96fe-404c-8ad9-ea042428a25c/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 [2020-11-28 03:02:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:26,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 03:02:26,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:02:27,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:27,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573720956] [2020-11-28 03:02:27,027 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:02:27,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934759938] [2020-11-28 03:02:27,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:02:27,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:02:27,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690896797] [2020-11-28 03:02:27,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:02:27,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:27,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:02:27,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:02:27,029 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 5 states. [2020-11-28 03:02:27,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:27,094 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2020-11-28 03:02:27,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:02:27,097 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-11-28 03:02:27,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:27,097 INFO L225 Difference]: With dead ends: 64 [2020-11-28 03:02:27,097 INFO L226 Difference]: Without dead ends: 40 [2020-11-28 03:02:27,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:02:27,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-28 03:02:27,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-11-28 03:02:27,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-28 03:02:27,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-11-28 03:02:27,114 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 19 [2020-11-28 03:02:27,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:27,115 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-11-28 03:02:27,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:02:27,115 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-11-28 03:02:27,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 03:02:27,117 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:27,117 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:27,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:02:27,331 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:02:27,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:27,332 INFO L82 PathProgramCache]: Analyzing trace with hash 623708457, now seen corresponding path program 1 times [2020-11-28 03:02:27,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:27,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241023882] [2020-11-28 03:02:27,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:27,340 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:02:27,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1784453643] [2020-11-28 03:02:27,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8b18101b-96fe-404c-8ad9-ea042428a25c/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 [2020-11-28 03:02:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:27,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 03:02:27,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:02:27,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:02:27,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241023882] [2020-11-28 03:02:27,469 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:02:27,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784453643] [2020-11-28 03:02:27,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:02:27,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:02:27,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10972998] [2020-11-28 03:02:27,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:02:27,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:27,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:02:27,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:02:27,471 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 5 states. [2020-11-28 03:02:27,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:27,596 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2020-11-28 03:02:27,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:02:27,597 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-11-28 03:02:27,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:27,598 INFO L225 Difference]: With dead ends: 83 [2020-11-28 03:02:27,598 INFO L226 Difference]: Without dead ends: 59 [2020-11-28 03:02:27,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:02:27,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-28 03:02:27,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 44. [2020-11-28 03:02:27,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-28 03:02:27,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-11-28 03:02:27,607 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 20 [2020-11-28 03:02:27,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:27,607 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-11-28 03:02:27,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:02:27,608 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-11-28 03:02:27,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 03:02:27,608 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:27,609 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:27,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:02:27,832 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:02:27,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:27,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1500130618, now seen corresponding path program 1 times [2020-11-28 03:02:27,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:27,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824935792] [2020-11-28 03:02:27,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:27,844 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:02:27,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974996970] [2020-11-28 03:02:27,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8b18101b-96fe-404c-8ad9-ea042428a25c/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:02:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:02:27,920 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:02:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:02:27,947 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:02:28,007 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:02:28,007 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 03:02:28,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-11-28 03:02:28,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:02:28 BoogieIcfgContainer [2020-11-28 03:02:28,249 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:02:28,250 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:02:28,252 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:02:28,252 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:02:28,253 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:02:00" (3/4) ... [2020-11-28 03:02:28,254 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 03:02:28,319 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_8b18101b-96fe-404c-8ad9-ea042428a25c/bin/uautomizer/witness.graphml [2020-11-28 03:02:28,319 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:02:28,321 INFO L168 Benchmark]: Toolchain (without parser) took 28533.56 ms. Allocated memory is still 104.9 MB. Free memory was 69.9 MB in the beginning and 55.2 MB in the end (delta: 14.8 MB). Peak memory consumption was 15.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:28,321 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 104.9 MB. Free memory is still 86.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:02:28,322 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.28 ms. Allocated memory is still 104.9 MB. Free memory was 69.8 MB in the beginning and 59.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:28,323 INFO L168 Benchmark]: Boogie Procedure Inliner took 66.89 ms. Allocated memory is still 104.9 MB. Free memory was 59.8 MB in the beginning and 58.2 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:02:28,323 INFO L168 Benchmark]: Boogie Preprocessor took 40.99 ms. Allocated memory is still 104.9 MB. Free memory was 58.1 MB in the beginning and 56.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:28,324 INFO L168 Benchmark]: RCFGBuilder took 413.81 ms. Allocated memory is still 104.9 MB. Free memory was 56.8 MB in the beginning and 41.2 MB in the end (delta: 15.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:28,324 INFO L168 Benchmark]: TraceAbstraction took 27630.56 ms. Allocated memory is still 104.9 MB. Free memory was 40.8 MB in the beginning and 57.7 MB in the end (delta: -17.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:02:28,325 INFO L168 Benchmark]: Witness Printer took 69.29 ms. Allocated memory is still 104.9 MB. Free memory was 57.7 MB in the beginning and 55.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:28,327 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 104.9 MB. Free memory is still 86.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 289.28 ms. Allocated memory is still 104.9 MB. Free memory was 69.8 MB in the beginning and 59.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 66.89 ms. Allocated memory is still 104.9 MB. Free memory was 59.8 MB in the beginning and 58.2 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.99 ms. Allocated memory is still 104.9 MB. Free memory was 58.1 MB in the beginning and 56.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 413.81 ms. Allocated memory is still 104.9 MB. Free memory was 56.8 MB in the beginning and 41.2 MB in the end (delta: 15.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 27630.56 ms. Allocated memory is still 104.9 MB. Free memory was 40.8 MB in the beginning and 57.7 MB in the end (delta: -17.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 69.29 ms. Allocated memory is still 104.9 MB. Free memory was 57.7 MB in the beginning and 55.2 MB in the end (delta: 2.6 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: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int counter = 0; VAL [counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) VAL [counter=0] [L9] COND FALSE !(!cond) VAL [counter=0] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<2 [L12] COND FALSE !(!(cond)) VAL [counter=1] [L36] COND FALSE !(!(r != 0)) VAL [counter=1] [L39] EXPR counter++ VAL [counter=2] [L39] COND TRUE counter++<2 [L12] COND FALSE !(!(cond)) VAL [counter=2] [L41] COND TRUE !(r > 0) VAL [counter=2] [L47] EXPR counter++ VAL [counter=3] [L47] COND FALSE !(counter++<2) [L34] EXPR counter++ VAL [counter=4] [L34] COND FALSE !(counter++<2) [L12] COND TRUE !(cond) VAL [counter=4] [L5] __assert_fail("0", "fermat1-ll.c", 5, "reach_error") VAL [counter=4] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 27.4s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 15.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 205 SDtfs, 136 SDslu, 334 SDs, 0 SdLazy, 170 SolverSat, 36 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 14.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 101 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=7, 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, 7 MinimizatonAttempts, 41 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 8.8s InterpolantComputationTime, 122 NumberOfCodeBlocks, 122 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 94 ConstructedInterpolants, 0 QuantifiedInterpolants, 4198 SizeOfPredicates, 18 NumberOfNonLiveVariables, 564 ConjunctsInSsa, 41 ConjunctsInUnsatCore, 7 InterpolantComputations, 6 PerfectInterpolantSequences, 6/7 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...