./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c70a0c1-8e02-45cf-8fed-e90364991462/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c70a0c1-8e02-45cf-8fed-e90364991462/bin/uautomizer-Z5i5R5N3CC/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c70a0c1-8e02-45cf-8fed-e90364991462/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c70a0c1-8e02-45cf-8fed-e90364991462/bin/uautomizer-Z5i5R5N3CC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c70a0c1-8e02-45cf-8fed-e90364991462/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c70a0c1-8e02-45cf-8fed-e90364991462/bin/uautomizer-Z5i5R5N3CC --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 1cc9cf79891afa42e51c5a84218adbd4a63e1151 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 00:22:25,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 00:22:25,962 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 00:22:26,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 00:22:26,001 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 00:22:26,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 00:22:26,006 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 00:22:26,008 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 00:22:26,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 00:22:26,011 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 00:22:26,012 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 00:22:26,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 00:22:26,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 00:22:26,016 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 00:22:26,017 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 00:22:26,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 00:22:26,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 00:22:26,021 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 00:22:26,023 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 00:22:26,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 00:22:26,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 00:22:26,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 00:22:26,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 00:22:26,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 00:22:26,035 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 00:22:26,035 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 00:22:26,036 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 00:22:26,037 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 00:22:26,037 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 00:22:26,039 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 00:22:26,039 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 00:22:26,040 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 00:22:26,041 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 00:22:26,042 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 00:22:26,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 00:22:26,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 00:22:26,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 00:22:26,045 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 00:22:26,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 00:22:26,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 00:22:26,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 00:22:26,049 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c70a0c1-8e02-45cf-8fed-e90364991462/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-11 00:22:26,079 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 00:22:26,080 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 00:22:26,081 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 00:22:26,081 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 00:22:26,082 INFO L138 SettingsManager]: * Use SBE=true [2021-10-11 00:22:26,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 00:22:26,082 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 00:22:26,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 00:22:26,082 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 00:22:26,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 00:22:26,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 00:22:26,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 00:22:26,083 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 00:22:26,083 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 00:22:26,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 00:22:26,084 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 00:22:26,084 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 00:22:26,084 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 00:22:26,084 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 00:22:26,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 00:22:26,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:22:26,085 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 00:22:26,085 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 00:22:26,085 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 00:22:26,086 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-11 00:22:26,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 00:22:26,086 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 00:22:26,086 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 00:22:26,086 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_worker_vcloud-master_on_vcloud-master/run_dir_9c70a0c1-8e02-45cf-8fed-e90364991462/bin/uautomizer-Z5i5R5N3CC/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c70a0c1-8e02-45cf-8fed-e90364991462/bin/uautomizer-Z5i5R5N3CC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cc9cf79891afa42e51c5a84218adbd4a63e1151 [2021-10-11 00:22:26,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 00:22:26,383 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 00:22:26,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 00:22:26,389 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 00:22:26,389 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 00:22:26,391 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c70a0c1-8e02-45cf-8fed-e90364991462/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c [2021-10-11 00:22:26,465 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c70a0c1-8e02-45cf-8fed-e90364991462/bin/uautomizer-Z5i5R5N3CC/data/3c56aa544/ed84ca52cd494b168463545e971942ca/FLAG0b8f4623b [2021-10-11 00:22:26,938 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 00:22:26,939 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c70a0c1-8e02-45cf-8fed-e90364991462/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c [2021-10-11 00:22:26,945 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c70a0c1-8e02-45cf-8fed-e90364991462/bin/uautomizer-Z5i5R5N3CC/data/3c56aa544/ed84ca52cd494b168463545e971942ca/FLAG0b8f4623b [2021-10-11 00:22:27,335 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c70a0c1-8e02-45cf-8fed-e90364991462/bin/uautomizer-Z5i5R5N3CC/data/3c56aa544/ed84ca52cd494b168463545e971942ca [2021-10-11 00:22:27,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 00:22:27,340 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 00:22:27,342 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 00:22:27,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 00:22:27,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 00:22:27,354 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:22:27" (1/1) ... [2021-10-11 00:22:27,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d9d132f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:27, skipping insertion in model container [2021-10-11 00:22:27,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:22:27" (1/1) ... [2021-10-11 00:22:27,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 00:22:27,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 00:22:27,581 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c70a0c1-8e02-45cf-8fed-e90364991462/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c[573,586] [2021-10-11 00:22:27,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:22:27,614 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 00:22:27,635 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c70a0c1-8e02-45cf-8fed-e90364991462/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c[573,586] [2021-10-11 00:22:27,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:22:27,670 INFO L208 MainTranslator]: Completed translation [2021-10-11 00:22:27,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:27 WrapperNode [2021-10-11 00:22:27,672 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 00:22:27,676 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 00:22:27,676 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 00:22:27,678 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 00:22:27,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:27" (1/1) ... [2021-10-11 00:22:27,692 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:27" (1/1) ... [2021-10-11 00:22:27,711 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 00:22:27,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 00:22:27,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 00:22:27,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 00:22:27,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:27" (1/1) ... [2021-10-11 00:22:27,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:27" (1/1) ... [2021-10-11 00:22:27,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:27" (1/1) ... [2021-10-11 00:22:27,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:27" (1/1) ... [2021-10-11 00:22:27,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:27" (1/1) ... [2021-10-11 00:22:27,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:27" (1/1) ... [2021-10-11 00:22:27,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:27" (1/1) ... [2021-10-11 00:22:27,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 00:22:27,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 00:22:27,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 00:22:27,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 00:22:27,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:27" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c70a0c1-8e02-45cf-8fed-e90364991462/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:22:27,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 00:22:27,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 00:22:27,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 00:22:27,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 00:22:28,043 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 00:22:28,044 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-11 00:22:28,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:22:28 BoogieIcfgContainer [2021-10-11 00:22:28,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 00:22:28,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 00:22:28,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 00:22:28,051 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 00:22:28,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:22:27" (1/3) ... [2021-10-11 00:22:28,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f830af4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:22:28, skipping insertion in model container [2021-10-11 00:22:28,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:27" (2/3) ... [2021-10-11 00:22:28,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f830af4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:22:28, skipping insertion in model container [2021-10-11 00:22:28,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:22:28" (3/3) ... [2021-10-11 00:22:28,054 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound5.c [2021-10-11 00:22:28,068 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 00:22:28,071 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-10-11 00:22:28,082 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-11 00:22:28,107 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 00:22:28,108 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 00:22:28,108 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 00:22:28,108 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 00:22:28,108 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 00:22:28,108 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 00:22:28,108 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 00:22:28,108 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 00:22:28,121 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2021-10-11 00:22:28,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 00:22:28,126 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:28,127 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:28,127 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:28,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:28,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1235340721, now seen corresponding path program 1 times [2021-10-11 00:22:28,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:28,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048789470] [2021-10-11 00:22:28,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:28,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:28,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:28,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048789470] [2021-10-11 00:22:28,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:22:28,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 00:22:28,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190265890] [2021-10-11 00:22:28,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 00:22:28,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:28,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 00:22:28,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 00:22:28,309 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2021-10-11 00:22:28,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:28,326 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2021-10-11 00:22:28,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 00:22:28,327 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2021-10-11 00:22:28,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:28,335 INFO L225 Difference]: With dead ends: 39 [2021-10-11 00:22:28,335 INFO L226 Difference]: Without dead ends: 17 [2021-10-11 00:22:28,338 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 [2021-10-11 00:22:28,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-11 00:22:28,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-11 00:22:28,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-11 00:22:28,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-10-11 00:22:28,372 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2021-10-11 00:22:28,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:28,373 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-10-11 00:22:28,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 00:22:28,373 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-10-11 00:22:28,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 00:22:28,374 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:28,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:28,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 00:22:28,375 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:28,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:28,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2021-10-11 00:22:28,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:28,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968344759] [2021-10-11 00:22:28,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:28,433 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:22:28,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1468848094] [2021-10-11 00:22:28,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c70a0c1-8e02-45cf-8fed-e90364991462/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:22:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:28,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-11 00:22:28,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:22:28,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:28,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968344759] [2021-10-11 00:22:28,811 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 00:22:28,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468848094] [2021-10-11 00:22:28,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:22:28,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-11 00:22:28,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084273346] [2021-10-11 00:22:28,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 00:22:28,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:28,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 00:22:28,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:22:28,816 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 8 states. [2021-10-11 00:22:29,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:29,138 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-10-11 00:22:29,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-11 00:22:29,138 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2021-10-11 00:22:29,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:29,140 INFO L225 Difference]: With dead ends: 32 [2021-10-11 00:22:29,141 INFO L226 Difference]: Without dead ends: 30 [2021-10-11 00:22:29,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-10-11 00:22:29,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-11 00:22:29,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2021-10-11 00:22:29,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-11 00:22:29,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-10-11 00:22:29,155 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 10 [2021-10-11 00:22:29,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:29,155 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-10-11 00:22:29,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 00:22:29,156 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-10-11 00:22:29,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 00:22:29,157 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:29,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:29,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-11 00:22:29,385 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:29,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:29,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1507424085, now seen corresponding path program 1 times [2021-10-11 00:22:29,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:29,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881367180] [2021-10-11 00:22:29,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:29,402 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:22:29,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [901867278] [2021-10-11 00:22:29,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c70a0c1-8e02-45cf-8fed-e90364991462/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:22:29,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:29,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 00:22:29,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:22:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:29,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881367180] [2021-10-11 00:22:29,484 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 00:22:29,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901867278] [2021-10-11 00:22:29,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:22:29,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 00:22:29,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797684882] [2021-10-11 00:22:29,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:22:29,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:29,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:22:29,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:22:29,486 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2021-10-11 00:22:29,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:29,498 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-10-11 00:22:29,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:22:29,498 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-10-11 00:22:29,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:29,499 INFO L225 Difference]: With dead ends: 24 [2021-10-11 00:22:29,499 INFO L226 Difference]: Without dead ends: 20 [2021-10-11 00:22:29,499 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 [2021-10-11 00:22:29,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-11 00:22:29,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-11 00:22:29,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-11 00:22:29,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-10-11 00:22:29,503 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2021-10-11 00:22:29,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:29,503 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-10-11 00:22:29,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:22:29,504 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-10-11 00:22:29,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-11 00:22:29,504 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:29,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:29,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:22:29,733 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:29,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:29,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1189458428, now seen corresponding path program 1 times [2021-10-11 00:22:29,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:29,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064783045] [2021-10-11 00:22:29,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:29,750 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:22:29,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [718627921] [2021-10-11 00:22:29,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c70a0c1-8e02-45cf-8fed-e90364991462/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:22:29,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:29,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-11 00:22:29,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:22:29,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:29,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064783045] [2021-10-11 00:22:29,929 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 00:22:29,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718627921] [2021-10-11 00:22:29,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:22:29,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-11 00:22:29,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101593105] [2021-10-11 00:22:29,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-10-11 00:22:29,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:29,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-11 00:22:29,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-11 00:22:29,934 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 9 states. [2021-10-11 00:22:30,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:30,092 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-10-11 00:22:30,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 00:22:30,093 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2021-10-11 00:22:30,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:30,095 INFO L225 Difference]: With dead ends: 24 [2021-10-11 00:22:30,095 INFO L226 Difference]: Without dead ends: 18 [2021-10-11 00:22:30,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-10-11 00:22:30,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-11 00:22:30,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-10-11 00:22:30,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-11 00:22:30,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-10-11 00:22:30,105 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2021-10-11 00:22:30,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:30,106 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-10-11 00:22:30,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-10-11 00:22:30,108 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-10-11 00:22:30,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-11 00:22:30,109 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:30,109 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:30,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:22:30,321 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:30,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:30,321 INFO L82 PathProgramCache]: Analyzing trace with hash -132612007, now seen corresponding path program 1 times [2021-10-11 00:22:30,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:30,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397482539] [2021-10-11 00:22:30,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:30,335 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:22:30,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [723880311] [2021-10-11 00:22:30,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c70a0c1-8e02-45cf-8fed-e90364991462/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:22:30,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:30,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-11 00:22:30,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:22:30,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:30,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397482539] [2021-10-11 00:22:30,433 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 00:22:30,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723880311] [2021-10-11 00:22:30,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:22:30,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-11 00:22:30,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475021310] [2021-10-11 00:22:30,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 00:22:30,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:30,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 00:22:30,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:22:30,436 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2021-10-11 00:22:30,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:30,464 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-10-11 00:22:30,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 00:22:30,464 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2021-10-11 00:22:30,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:30,466 INFO L225 Difference]: With dead ends: 26 [2021-10-11 00:22:30,466 INFO L226 Difference]: Without dead ends: 22 [2021-10-11 00:22:30,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:22:30,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-11 00:22:30,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-11 00:22:30,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-11 00:22:30,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-10-11 00:22:30,479 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2021-10-11 00:22:30,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:30,479 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-10-11 00:22:30,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 00:22:30,480 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-10-11 00:22:30,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-11 00:22:30,480 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:30,481 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:30,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:22:30,693 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:30,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:30,693 INFO L82 PathProgramCache]: Analyzing trace with hash -625728149, now seen corresponding path program 2 times [2021-10-11 00:22:30,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:30,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21814524] [2021-10-11 00:22:30,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:30,706 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:22:30,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95786430] [2021-10-11 00:22:30,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c70a0c1-8e02-45cf-8fed-e90364991462/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:22:30,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 00:22:30,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:22:30,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 00:22:30,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:22:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:30,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21814524] [2021-10-11 00:22:30,823 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 00:22:30,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95786430] [2021-10-11 00:22:30,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:22:30,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-11 00:22:30,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552846418] [2021-10-11 00:22:30,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 00:22:30,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:30,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 00:22:30,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:22:30,829 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2021-10-11 00:22:30,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:30,873 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-10-11 00:22:30,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 00:22:30,874 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-10-11 00:22:30,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:30,877 INFO L225 Difference]: With dead ends: 31 [2021-10-11 00:22:30,877 INFO L226 Difference]: Without dead ends: 27 [2021-10-11 00:22:30,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:22:30,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-11 00:22:30,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-11 00:22:30,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-11 00:22:30,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-10-11 00:22:30,894 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2021-10-11 00:22:30,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:30,895 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-10-11 00:22:30,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 00:22:30,895 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-10-11 00:22:30,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-11 00:22:30,896 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:30,896 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:31,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-11 00:22:31,105 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:31,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:31,105 INFO L82 PathProgramCache]: Analyzing trace with hash 256826265, now seen corresponding path program 3 times [2021-10-11 00:22:31,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:31,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562579859] [2021-10-11 00:22:31,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:31,117 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:22:31,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865221481] [2021-10-11 00:22:31,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c70a0c1-8e02-45cf-8fed-e90364991462/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:22:31,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-11 00:22:31,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:22:31,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-11 00:22:31,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:22:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:31,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562579859] [2021-10-11 00:22:31,253 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 00:22:31,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865221481] [2021-10-11 00:22:31,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:22:31,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-11 00:22:31,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173643868] [2021-10-11 00:22:31,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 00:22:31,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:31,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 00:22:31,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:22:31,256 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 7 states. [2021-10-11 00:22:31,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:31,315 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-10-11 00:22:31,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-11 00:22:31,316 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2021-10-11 00:22:31,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:31,317 INFO L225 Difference]: With dead ends: 36 [2021-10-11 00:22:31,318 INFO L226 Difference]: Without dead ends: 32 [2021-10-11 00:22:31,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-11 00:22:31,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-11 00:22:31,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-11 00:22:31,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-10-11 00:22:31,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-10-11 00:22:31,325 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 26 [2021-10-11 00:22:31,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:31,326 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-10-11 00:22:31,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 00:22:31,326 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-10-11 00:22:31,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-11 00:22:31,327 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:31,327 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:31,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:22:31,551 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:31,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:31,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1955278293, now seen corresponding path program 4 times [2021-10-11 00:22:31,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:31,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971284641] [2021-10-11 00:22:31,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:31,563 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:22:31,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1004675340] [2021-10-11 00:22:31,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c70a0c1-8e02-45cf-8fed-e90364991462/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:22:31,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 00:22:31,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:22:31,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-11 00:22:31,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:22:31,733 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:31,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971284641] [2021-10-11 00:22:31,734 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 00:22:31,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004675340] [2021-10-11 00:22:31,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:22:31,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-11 00:22:31,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858400965] [2021-10-11 00:22:31,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 00:22:31,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:31,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 00:22:31,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:22:31,736 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2021-10-11 00:22:31,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:31,817 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-10-11 00:22:31,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-11 00:22:31,818 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2021-10-11 00:22:31,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:31,819 INFO L225 Difference]: With dead ends: 41 [2021-10-11 00:22:31,819 INFO L226 Difference]: Without dead ends: 37 [2021-10-11 00:22:31,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-10-11 00:22:31,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-11 00:22:31,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-10-11 00:22:31,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-10-11 00:22:31,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-10-11 00:22:31,825 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 31 [2021-10-11 00:22:31,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:31,825 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-10-11 00:22:31,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 00:22:31,825 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-10-11 00:22:31,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-11 00:22:31,826 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:31,827 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:32,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:22:32,053 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:32,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:32,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1615059239, now seen corresponding path program 5 times [2021-10-11 00:22:32,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:32,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441181374] [2021-10-11 00:22:32,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:32,065 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:22:32,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418867822] [2021-10-11 00:22:32,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c70a0c1-8e02-45cf-8fed-e90364991462/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:22:32,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-11 00:22:32,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-11 00:22:32,143 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:22:32,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:22:32,165 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:22:32,236 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:22:32,237 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 00:22:32,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-11 00:22:32,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:22:32 BoogieIcfgContainer [2021-10-11 00:22:32,507 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 00:22:32,508 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 00:22:32,508 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 00:22:32,508 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 00:22:32,508 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:22:28" (3/4) ... [2021-10-11 00:22:32,510 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 00:22:32,577 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c70a0c1-8e02-45cf-8fed-e90364991462/bin/uautomizer-Z5i5R5N3CC/witness.graphml [2021-10-11 00:22:32,578 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 00:22:32,579 INFO L168 Benchmark]: Toolchain (without parser) took 5238.44 ms. Allocated memory was 115.3 MB in the beginning and 146.8 MB in the end (delta: 31.5 MB). Free memory was 78.2 MB in the beginning and 121.1 MB in the end (delta: -42.9 MB). Peak memory consumption was 73.0 MB. Max. memory is 16.1 GB. [2021-10-11 00:22:32,580 INFO L168 Benchmark]: CDTParser took 0.53 ms. Allocated memory is still 115.3 MB. Free memory was 94.7 MB in the beginning and 94.6 MB in the end (delta: 68.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:22:32,580 INFO L168 Benchmark]: CACSL2BoogieTranslator took 330.85 ms. Allocated memory is still 115.3 MB. Free memory was 78.0 MB in the beginning and 89.5 MB in the end (delta: -11.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 00:22:32,581 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.76 ms. Allocated memory is still 115.3 MB. Free memory was 89.5 MB in the beginning and 88.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:22:32,581 INFO L168 Benchmark]: Boogie Preprocessor took 31.17 ms. Allocated memory is still 115.3 MB. Free memory was 88.0 MB in the beginning and 87.0 MB in the end (delta: 942.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:22:32,582 INFO L168 Benchmark]: RCFGBuilder took 300.17 ms. Allocated memory is still 115.3 MB. Free memory was 87.0 MB in the beginning and 73.7 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-11 00:22:32,583 INFO L168 Benchmark]: TraceAbstraction took 4460.32 ms. Allocated memory was 115.3 MB in the beginning and 146.8 MB in the end (delta: 31.5 MB). Free memory was 73.4 MB in the beginning and 39.5 MB in the end (delta: 33.9 MB). Peak memory consumption was 69.2 MB. Max. memory is 16.1 GB. [2021-10-11 00:22:32,583 INFO L168 Benchmark]: Witness Printer took 70.12 ms. Allocated memory is still 146.8 MB. Free memory was 39.5 MB in the beginning and 121.1 MB in the end (delta: -81.7 MB). Peak memory consumption was 2.2 MB. Max. memory is 16.1 GB. [2021-10-11 00:22:32,586 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53 ms. Allocated memory is still 115.3 MB. Free memory was 94.7 MB in the beginning and 94.6 MB in the end (delta: 68.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 330.85 ms. Allocated memory is still 115.3 MB. Free memory was 78.0 MB in the beginning and 89.5 MB in the end (delta: -11.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.76 ms. Allocated memory is still 115.3 MB. Free memory was 89.5 MB in the beginning and 88.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.17 ms. Allocated memory is still 115.3 MB. Free memory was 88.0 MB in the beginning and 87.0 MB in the end (delta: 942.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 300.17 ms. Allocated memory is still 115.3 MB. Free memory was 87.0 MB in the beginning and 73.7 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4460.32 ms. Allocated memory was 115.3 MB in the beginning and 146.8 MB in the end (delta: 31.5 MB). Free memory was 73.4 MB in the beginning and 39.5 MB in the end (delta: 33.9 MB). Peak memory consumption was 69.2 MB. Max. memory is 16.1 GB. * Witness Printer took 70.12 ms. Allocated memory is still 146.8 MB. Free memory was 39.5 MB in the beginning and 121.1 MB in the end (delta: -81.7 MB). Peak memory consumption was 2.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L13] COND FALSE !(!cond) VAL [counter=0] [L13] COND FALSE !(!cond) VAL [counter=0] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [counter=0] [L36] EXPR counter++ VAL [counter=1] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=1] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=1] [L36] EXPR counter++ VAL [counter=2] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=2] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=2] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=2] [L36] EXPR counter++ VAL [counter=3] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=3] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=3] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=3] [L36] EXPR counter++ VAL [counter=4] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=4] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=4] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=4] [L36] EXPR counter++ VAL [counter=5] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=5] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=5] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=5] [L36] EXPR counter++ VAL [counter=6] [L36] COND FALSE !(counter++<5) [L16] COND TRUE !(cond) VAL [counter=6] [L18] reach_error() VAL [counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.3s, OverallIterations: 9, TraceHistogramMax: 6, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 116 SDtfs, 149 SDslu, 226 SDs, 0 SdLazy, 140 SolverSat, 36 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 141 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=8, 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, 8 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 174 NumberOfCodeBlocks, 174 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 130 ConstructedInterpolants, 0 QuantifiedInterpolants, 8220 SizeOfPredicates, 30 NumberOfNonLiveVariables, 680 ConjunctsInSsa, 76 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 0/70 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...