./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.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_630334c7-af82-4c65-9ecf-3a86337c1146/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c -s /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/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 c8ffdb7e52f13c5228ce15f1d79a563f57556d0a ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 03:03:40,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:03:40,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:03:40,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:03:40,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:03:40,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:03:40,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:03:40,737 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:03:40,739 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:03:40,741 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:03:40,742 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:03:40,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:03:40,744 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:03:40,745 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:03:40,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:03:40,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:03:40,749 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:03:40,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:03:40,753 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:03:40,756 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:03:40,758 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:03:40,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:03:40,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:03:40,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:03:40,778 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:03:40,783 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:03:40,783 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:03:40,784 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:03:40,785 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:03:40,788 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:03:40,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:03:40,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:03:40,791 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:03:40,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:03:40,795 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:03:40,795 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:03:40,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:03:40,797 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:03:40,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:03:40,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:03:40,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:03:40,802 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 03:03:40,850 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:03:40,851 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:03:40,853 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:03:40,853 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:03:40,854 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:03:40,854 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:03:40,854 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:03:40,854 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:03:40,855 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:03:40,855 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:03:40,856 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:03:40,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:03:40,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:03:40,857 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:03:40,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:03:40,858 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:03:40,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:03:40,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:03:40,859 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:03:40,859 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:03:40,859 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:03:40,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:03:40,860 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:03:40,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:03:40,860 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:03:40,861 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:03:40,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:03:40,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:03:40,861 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:03:40,862 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_630334c7-af82-4c65-9ecf-3a86337c1146/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8ffdb7e52f13c5228ce15f1d79a563f57556d0a [2020-11-28 03:03:41,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:03:41,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:03:41,217 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:03:41,219 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:03:41,220 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:03:41,222 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c [2020-11-28 03:03:41,327 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/bin/uautomizer/data/8e13037ae/22458ad809604c10b98101445bd84a85/FLAGe4041ea05 [2020-11-28 03:03:41,801 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:03:41,802 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c [2020-11-28 03:03:41,815 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/bin/uautomizer/data/8e13037ae/22458ad809604c10b98101445bd84a85/FLAGe4041ea05 [2020-11-28 03:03:42,176 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/bin/uautomizer/data/8e13037ae/22458ad809604c10b98101445bd84a85 [2020-11-28 03:03:42,179 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:03:42,180 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:03:42,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:03:42,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:03:42,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:03:42,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:03:42" (1/1) ... [2020-11-28 03:03:42,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14fa90c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:42, skipping insertion in model container [2020-11-28 03:03:42,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:03:42" (1/1) ... [2020-11-28 03:03:42,209 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:03:42,229 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:03:42,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:03:42,473 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:03:42,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:03:42,508 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:03:42,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:42 WrapperNode [2020-11-28 03:03:42,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:03:42,510 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:03:42,510 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:03:42,510 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:03:42,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:42" (1/1) ... [2020-11-28 03:03:42,525 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:42" (1/1) ... [2020-11-28 03:03:42,548 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:03:42,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:03:42,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:03:42,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:03:42,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:42" (1/1) ... [2020-11-28 03:03:42,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:42" (1/1) ... [2020-11-28 03:03:42,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:42" (1/1) ... [2020-11-28 03:03:42,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:42" (1/1) ... [2020-11-28 03:03:42,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:42" (1/1) ... [2020-11-28 03:03:42,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:42" (1/1) ... [2020-11-28 03:03:42,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:42" (1/1) ... [2020-11-28 03:03:42,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:03:42,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:03:42,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:03:42,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:03:42,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/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 03:03:42,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:03:42,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:03:42,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:03:42,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:03:43,133 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:03:43,139 INFO L298 CfgBuilder]: Removed 17 assume(true) statements. [2020-11-28 03:03:43,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:03:43 BoogieIcfgContainer [2020-11-28 03:03:43,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:03:43,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:03:43,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:03:43,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:03:43,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:03:42" (1/3) ... [2020-11-28 03:03:43,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34dfc781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:03:43, skipping insertion in model container [2020-11-28 03:03:43,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:42" (2/3) ... [2020-11-28 03:03:43,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34dfc781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:03:43, skipping insertion in model container [2020-11-28 03:03:43,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:03:43" (3/3) ... [2020-11-28 03:03:43,159 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound20.c [2020-11-28 03:03:43,173 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:03:43,178 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-28 03:03:43,195 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-28 03:03:43,244 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:03:43,245 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:03:43,245 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:03:43,245 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:03:43,245 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:03:43,245 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:03:43,245 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:03:43,246 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:03:43,269 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-11-28 03:03:43,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 03:03:43,275 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:43,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:43,277 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:03:43,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:43,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1235309937, now seen corresponding path program 1 times [2020-11-28 03:03:43,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:43,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56920520] [2020-11-28 03:03:43,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:43,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:43,526 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 03:03:43,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56920520] [2020-11-28 03:03:43,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:03:43,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 03:03:43,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163644176] [2020-11-28 03:03:43,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 03:03:43,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:43,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 03:03:43,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 03:03:43,556 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-11-28 03:03:43,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:43,576 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2020-11-28 03:03:43,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 03:03:43,577 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-11-28 03:03:43,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:43,585 INFO L225 Difference]: With dead ends: 39 [2020-11-28 03:03:43,585 INFO L226 Difference]: Without dead ends: 17 [2020-11-28 03:03:43,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 03:03:43,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-28 03:03:43,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-28 03:03:43,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-28 03:03:43,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-11-28 03:03:43,618 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2020-11-28 03:03:43,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:43,618 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-11-28 03:03:43,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 03:03:43,618 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-11-28 03:03:43,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 03:03:43,619 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:43,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:43,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:03:43,620 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:03:43,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:43,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2020-11-28 03:03:43,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:43,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992578673] [2020-11-28 03:03:43,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:43,648 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:03:43,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274275414] [2020-11-28 03:03:43,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/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 03:03:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:43,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-28 03:03:43,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:03:43,899 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-28 03:03:43,900 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:03:43,985 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 03:03:43,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992578673] [2020-11-28 03:03:43,986 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:03:43,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274275414] [2020-11-28 03:03:43,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:03:43,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-28 03:03:43,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318651437] [2020-11-28 03:03:43,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:03:43,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:43,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:03:43,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:03:43,990 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 6 states. [2020-11-28 03:03:44,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:44,265 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2020-11-28 03:03:44,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:03:44,267 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-28 03:03:44,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:44,268 INFO L225 Difference]: With dead ends: 32 [2020-11-28 03:03:44,268 INFO L226 Difference]: Without dead ends: 30 [2020-11-28 03:03:44,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:03:44,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-28 03:03:44,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2020-11-28 03:03:44,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-28 03:03:44,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-11-28 03:03:44,280 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 10 [2020-11-28 03:03:44,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:44,280 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-11-28 03:03:44,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:03:44,291 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-11-28 03:03:44,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:03:44,292 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:44,292 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:44,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-28 03:03:44,508 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:03:44,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:44,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1507423092, now seen corresponding path program 1 times [2020-11-28 03:03:44,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:44,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267607444] [2020-11-28 03:03:44,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:44,530 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:03:44,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [918189085] [2020-11-28 03:03:44,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/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 03:03:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:44,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 03:03:44,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:03:44,629 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 03:03:44,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267607444] [2020-11-28 03:03:44,630 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:03:44,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918189085] [2020-11-28 03:03:44,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:03:44,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:03:44,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374427395] [2020-11-28 03:03:44,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:03:44,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:44,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:03:44,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:03:44,633 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2020-11-28 03:03:44,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:44,661 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-11-28 03:03:44,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:03:44,662 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-28 03:03:44,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:44,663 INFO L225 Difference]: With dead ends: 24 [2020-11-28 03:03:44,663 INFO L226 Difference]: Without dead ends: 20 [2020-11-28 03:03:44,664 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 03:03:44,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-28 03:03:44,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-28 03:03:44,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-28 03:03:44,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-11-28 03:03:44,671 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2020-11-28 03:03:44,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:44,672 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-11-28 03:03:44,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:03:44,672 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-11-28 03:03:44,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 03:03:44,673 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:44,673 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:44,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:44,879 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:03:44,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:44,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1188504123, now seen corresponding path program 1 times [2020-11-28 03:03:44,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:44,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680332704] [2020-11-28 03:03:44,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:44,913 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:03:44,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1076531661] [2020-11-28 03:03:44,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/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 03:03:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:45,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 03:03:45,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:03:45,039 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-28 03:03:45,039 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:03:45,149 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 03:03:45,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680332704] [2020-11-28 03:03:45,149 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:03:45,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076531661] [2020-11-28 03:03:45,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:03:45,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-28 03:03:45,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62237616] [2020-11-28 03:03:45,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:03:45,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:45,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:03:45,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:03:45,151 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2020-11-28 03:03:45,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:45,322 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-11-28 03:03:45,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:03:45,322 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-11-28 03:03:45,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:45,323 INFO L225 Difference]: With dead ends: 24 [2020-11-28 03:03:45,323 INFO L226 Difference]: Without dead ends: 18 [2020-11-28 03:03:45,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:03:45,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-28 03:03:45,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-11-28 03:03:45,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-28 03:03:45,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-11-28 03:03:45,334 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-11-28 03:03:45,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:45,334 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-11-28 03:03:45,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:03:45,335 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-11-28 03:03:45,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 03:03:45,335 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:45,336 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:45,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:45,536 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:03:45,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:45,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1768635143, now seen corresponding path program 1 times [2020-11-28 03:03:45,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:45,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263767236] [2020-11-28 03:03:45,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:45,556 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:03:45,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141414804] [2020-11-28 03:03:45,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/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 03:03:45,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:45,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 03:03:45,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:03:45,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:03:45,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263767236] [2020-11-28 03:03:45,660 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:03:45,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141414804] [2020-11-28 03:03:45,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:03:45,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-11-28 03:03:45,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544260200] [2020-11-28 03:03:45,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:03:45,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:45,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:03:45,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:03:45,662 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-11-28 03:03:45,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:45,709 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-11-28 03:03:45,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:03:45,710 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-11-28 03:03:45,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:45,711 INFO L225 Difference]: With dead ends: 26 [2020-11-28 03:03:45,711 INFO L226 Difference]: Without dead ends: 22 [2020-11-28 03:03:45,712 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 [2020-11-28 03:03:45,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-28 03:03:45,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-28 03:03:45,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-28 03:03:45,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-11-28 03:03:45,717 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2020-11-28 03:03:45,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:45,718 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-11-28 03:03:45,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:03:45,718 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-11-28 03:03:45,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 03:03:45,719 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:45,719 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:45,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:45,933 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:03:45,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:45,934 INFO L82 PathProgramCache]: Analyzing trace with hash 71944364, now seen corresponding path program 2 times [2020-11-28 03:03:45,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:45,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740049485] [2020-11-28 03:03:45,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:45,953 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:03:45,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665963157] [2020-11-28 03:03:45,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/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 03:03:46,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:03:46,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:03:46,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:03:46,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:03:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:03:46,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740049485] [2020-11-28 03:03:46,071 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:03:46,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665963157] [2020-11-28 03:03:46,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:03:46,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-28 03:03:46,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032557536] [2020-11-28 03:03:46,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:03:46,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:46,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:03:46,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:03:46,074 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2020-11-28 03:03:46,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:46,141 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-11-28 03:03:46,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 03:03:46,142 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-11-28 03:03:46,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:46,142 INFO L225 Difference]: With dead ends: 31 [2020-11-28 03:03:46,142 INFO L226 Difference]: Without dead ends: 27 [2020-11-28 03:03:46,143 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 [2020-11-28 03:03:46,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-28 03:03:46,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-28 03:03:46,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-28 03:03:46,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-11-28 03:03:46,148 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2020-11-28 03:03:46,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:46,149 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-11-28 03:03:46,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:03:46,150 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-11-28 03:03:46,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-28 03:03:46,151 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:46,151 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:46,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-28 03:03:46,364 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:03:46,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:46,365 INFO L82 PathProgramCache]: Analyzing trace with hash 800201945, now seen corresponding path program 3 times [2020-11-28 03:03:46,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:46,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685233875] [2020-11-28 03:03:46,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:46,396 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:03:46,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250966345] [2020-11-28 03:03:46,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/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 03:03:46,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-28 03:03:46,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:03:46,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 03:03:46,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:03:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:03:46,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685233875] [2020-11-28 03:03:46,601 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:03:46,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250966345] [2020-11-28 03:03:46,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:03:46,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-28 03:03:46,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399373020] [2020-11-28 03:03:46,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 03:03:46,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:46,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 03:03:46,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:03:46,603 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 7 states. [2020-11-28 03:03:46,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:46,684 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-11-28 03:03:46,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 03:03:46,685 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-11-28 03:03:46,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:46,686 INFO L225 Difference]: With dead ends: 36 [2020-11-28 03:03:46,686 INFO L226 Difference]: Without dead ends: 32 [2020-11-28 03:03:46,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:03:46,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-28 03:03:46,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-11-28 03:03:46,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-28 03:03:46,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-11-28 03:03:46,695 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 26 [2020-11-28 03:03:46,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:46,695 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-11-28 03:03:46,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 03:03:46,696 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-11-28 03:03:46,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-28 03:03:46,697 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:46,697 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:46,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:46,912 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:03:46,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:46,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1993843508, now seen corresponding path program 4 times [2020-11-28 03:03:46,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:46,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716261705] [2020-11-28 03:03:46,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:46,922 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:03:46,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [133132989] [2020-11-28 03:03:46,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/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 03:03:46,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 03:03:46,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:03:46,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:03:47,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:03:47,103 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:03:47,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716261705] [2020-11-28 03:03:47,104 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:03:47,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133132989] [2020-11-28 03:03:47,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:03:47,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-28 03:03:47,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082550053] [2020-11-28 03:03:47,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:03:47,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:47,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:03:47,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:03:47,106 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2020-11-28 03:03:47,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:47,235 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-11-28 03:03:47,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 03:03:47,237 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-11-28 03:03:47,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:47,238 INFO L225 Difference]: With dead ends: 41 [2020-11-28 03:03:47,238 INFO L226 Difference]: Without dead ends: 37 [2020-11-28 03:03:47,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:03:47,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-28 03:03:47,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-11-28 03:03:47,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-28 03:03:47,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-11-28 03:03:47,250 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 31 [2020-11-28 03:03:47,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:47,251 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-11-28 03:03:47,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:03:47,251 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-11-28 03:03:47,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-28 03:03:47,252 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:47,253 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:47,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:47,468 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:03:47,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:47,469 INFO L82 PathProgramCache]: Analyzing trace with hash -915727175, now seen corresponding path program 5 times [2020-11-28 03:03:47,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:47,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358483538] [2020-11-28 03:03:47,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:47,495 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:03:47,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114496062] [2020-11-28 03:03:47,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/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 03:03:47,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-28 03:03:47,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:03:47,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-28 03:03:47,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:03:47,688 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:03:47,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358483538] [2020-11-28 03:03:47,688 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:03:47,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114496062] [2020-11-28 03:03:47,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:03:47,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-28 03:03:47,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301697886] [2020-11-28 03:03:47,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 03:03:47,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:47,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 03:03:47,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:03:47,691 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 9 states. [2020-11-28 03:03:47,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:47,819 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-11-28 03:03:47,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-28 03:03:47,819 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-11-28 03:03:47,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:47,820 INFO L225 Difference]: With dead ends: 46 [2020-11-28 03:03:47,820 INFO L226 Difference]: Without dead ends: 42 [2020-11-28 03:03:47,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:03:47,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-28 03:03:47,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-28 03:03:47,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-28 03:03:47,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-11-28 03:03:47,829 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 36 [2020-11-28 03:03:47,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:47,829 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-11-28 03:03:47,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 03:03:47,829 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-11-28 03:03:47,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-28 03:03:47,830 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:47,832 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:48,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-28 03:03:48,057 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:03:48,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:48,058 INFO L82 PathProgramCache]: Analyzing trace with hash -462141204, now seen corresponding path program 6 times [2020-11-28 03:03:48,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:48,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434007781] [2020-11-28 03:03:48,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:48,078 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:03:48,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227161595] [2020-11-28 03:03:48,079 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:48,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-28 03:03:48,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:03:48,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-28 03:03:48,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:03:48,297 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:03:48,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434007781] [2020-11-28 03:03:48,298 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:03:48,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227161595] [2020-11-28 03:03:48,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:03:48,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-28 03:03:48,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970119302] [2020-11-28 03:03:48,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 03:03:48,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:48,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 03:03:48,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:03:48,301 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 10 states. [2020-11-28 03:03:48,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:48,444 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-11-28 03:03:48,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-28 03:03:48,445 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-11-28 03:03:48,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:48,446 INFO L225 Difference]: With dead ends: 51 [2020-11-28 03:03:48,446 INFO L226 Difference]: Without dead ends: 47 [2020-11-28 03:03:48,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2020-11-28 03:03:48,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-28 03:03:48,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-11-28 03:03:48,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-28 03:03:48,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-11-28 03:03:48,454 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 41 [2020-11-28 03:03:48,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:48,455 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-11-28 03:03:48,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 03:03:48,455 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-11-28 03:03:48,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-28 03:03:48,457 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:48,457 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:48,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:48,680 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:03:48,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:48,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1286749031, now seen corresponding path program 7 times [2020-11-28 03:03:48,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:48,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331168636] [2020-11-28 03:03:48,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:48,694 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:03:48,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49545908] [2020-11-28 03:03:48,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:48,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-28 03:03:48,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:03:48,939 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:03:48,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331168636] [2020-11-28 03:03:48,940 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:03:48,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49545908] [2020-11-28 03:03:48,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:03:48,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-28 03:03:48,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719943897] [2020-11-28 03:03:48,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 03:03:48,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:48,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 03:03:48,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:03:48,944 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 11 states. [2020-11-28 03:03:49,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:49,131 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-11-28 03:03:49,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-28 03:03:49,132 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-11-28 03:03:49,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:49,133 INFO L225 Difference]: With dead ends: 56 [2020-11-28 03:03:49,133 INFO L226 Difference]: Without dead ends: 52 [2020-11-28 03:03:49,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2020-11-28 03:03:49,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-28 03:03:49,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-11-28 03:03:49,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-28 03:03:49,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-11-28 03:03:49,150 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 46 [2020-11-28 03:03:49,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:49,150 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-11-28 03:03:49,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 03:03:49,151 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-11-28 03:03:49,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-28 03:03:49,152 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:49,152 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:49,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:49,353 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:03:49,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:49,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1331662092, now seen corresponding path program 8 times [2020-11-28 03:03:49,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:49,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981823649] [2020-11-28 03:03:49,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:49,364 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:03:49,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428916600] [2020-11-28 03:03:49,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:49,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:03:49,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:03:49,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-28 03:03:49,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:03:49,689 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:03:49,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981823649] [2020-11-28 03:03:49,690 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:03:49,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428916600] [2020-11-28 03:03:49,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:03:49,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-11-28 03:03:49,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107490543] [2020-11-28 03:03:49,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 03:03:49,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:49,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 03:03:49,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:03:49,692 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 12 states. [2020-11-28 03:03:49,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:49,904 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-11-28 03:03:49,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-28 03:03:49,905 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-11-28 03:03:49,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:49,906 INFO L225 Difference]: With dead ends: 61 [2020-11-28 03:03:49,906 INFO L226 Difference]: Without dead ends: 57 [2020-11-28 03:03:49,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2020-11-28 03:03:49,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-28 03:03:49,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-11-28 03:03:49,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-28 03:03:49,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2020-11-28 03:03:49,915 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 51 [2020-11-28 03:03:49,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:49,915 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2020-11-28 03:03:49,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 03:03:49,916 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2020-11-28 03:03:49,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-28 03:03:49,916 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:49,916 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:50,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-28 03:03:50,117 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:03:50,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:50,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1553460103, now seen corresponding path program 9 times [2020-11-28 03:03:50,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:50,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171799554] [2020-11-28 03:03:50,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:50,133 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:03:50,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022013425] [2020-11-28 03:03:50,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:50,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-28 03:03:50,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:03:50,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-28 03:03:50,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:03:50,522 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:03:50,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171799554] [2020-11-28 03:03:50,523 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:03:50,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022013425] [2020-11-28 03:03:50,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:03:50,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-28 03:03:50,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951050983] [2020-11-28 03:03:50,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 03:03:50,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:50,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 03:03:50,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-11-28 03:03:50,526 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 13 states. [2020-11-28 03:03:50,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:50,725 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-11-28 03:03:50,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-28 03:03:50,726 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-11-28 03:03:50,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:50,727 INFO L225 Difference]: With dead ends: 66 [2020-11-28 03:03:50,727 INFO L226 Difference]: Without dead ends: 62 [2020-11-28 03:03:50,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2020-11-28 03:03:50,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-28 03:03:50,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-11-28 03:03:50,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-28 03:03:50,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-11-28 03:03:50,740 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 56 [2020-11-28 03:03:50,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:50,740 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-11-28 03:03:50,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 03:03:50,741 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-11-28 03:03:50,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-28 03:03:50,744 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:50,744 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:50,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-28 03:03:50,944 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:03:50,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:50,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1399051988, now seen corresponding path program 10 times [2020-11-28 03:03:50,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:50,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731723457] [2020-11-28 03:03:50,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:50,955 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:03:50,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276169914] [2020-11-28 03:03:50,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:51,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 03:03:51,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:03:51,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-28 03:03:51,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:03:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:03:51,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731723457] [2020-11-28 03:03:51,235 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:03:51,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276169914] [2020-11-28 03:03:51,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:03:51,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-28 03:03:51,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873448871] [2020-11-28 03:03:51,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-28 03:03:51,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:51,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-28 03:03:51,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:03:51,238 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 14 states. [2020-11-28 03:03:51,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:51,491 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2020-11-28 03:03:51,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-28 03:03:51,492 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-11-28 03:03:51,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:51,492 INFO L225 Difference]: With dead ends: 71 [2020-11-28 03:03:51,492 INFO L226 Difference]: Without dead ends: 67 [2020-11-28 03:03:51,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2020-11-28 03:03:51,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-28 03:03:51,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-11-28 03:03:51,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-28 03:03:51,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2020-11-28 03:03:51,516 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 61 [2020-11-28 03:03:51,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:51,517 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2020-11-28 03:03:51,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-28 03:03:51,518 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2020-11-28 03:03:51,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-28 03:03:51,520 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:51,521 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:51,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-28 03:03:51,722 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:03:51,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:51,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1773663143, now seen corresponding path program 11 times [2020-11-28 03:03:51,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:51,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61717603] [2020-11-28 03:03:51,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:51,733 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:03:51,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788079829] [2020-11-28 03:03:51,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:51,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-28 03:03:51,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:03:51,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-28 03:03:51,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:03:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:03:52,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61717603] [2020-11-28 03:03:52,071 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:03:52,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788079829] [2020-11-28 03:03:52,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:03:52,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-11-28 03:03:52,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168852157] [2020-11-28 03:03:52,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-28 03:03:52,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:52,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-28 03:03:52,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-11-28 03:03:52,074 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 15 states. [2020-11-28 03:03:52,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:52,337 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-11-28 03:03:52,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-28 03:03:52,338 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2020-11-28 03:03:52,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:52,339 INFO L225 Difference]: With dead ends: 76 [2020-11-28 03:03:52,339 INFO L226 Difference]: Without dead ends: 72 [2020-11-28 03:03:52,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2020-11-28 03:03:52,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-11-28 03:03:52,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-11-28 03:03:52,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-28 03:03:52,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2020-11-28 03:03:52,356 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 66 [2020-11-28 03:03:52,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:52,356 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2020-11-28 03:03:52,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-28 03:03:52,357 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2020-11-28 03:03:52,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-28 03:03:52,360 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:52,361 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:52,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:52,584 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:03:52,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:52,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1470358196, now seen corresponding path program 12 times [2020-11-28 03:03:52,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:52,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272188127] [2020-11-28 03:03:52,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:52,602 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:03:52,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735944608] [2020-11-28 03:03:52,605 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:52,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-28 03:03:52,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:03:52,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-28 03:03:52,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:03:53,142 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:03:53,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272188127] [2020-11-28 03:03:53,143 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:03:53,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735944608] [2020-11-28 03:03:53,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:03:53,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-11-28 03:03:53,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700308030] [2020-11-28 03:03:53,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-28 03:03:53,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:53,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-28 03:03:53,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-11-28 03:03:53,144 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand 16 states. [2020-11-28 03:03:53,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:53,372 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2020-11-28 03:03:53,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-28 03:03:53,372 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2020-11-28 03:03:53,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:53,373 INFO L225 Difference]: With dead ends: 81 [2020-11-28 03:03:53,373 INFO L226 Difference]: Without dead ends: 77 [2020-11-28 03:03:53,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2020-11-28 03:03:53,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-28 03:03:53,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-11-28 03:03:53,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-28 03:03:53,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2020-11-28 03:03:53,395 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 71 [2020-11-28 03:03:53,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:53,396 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2020-11-28 03:03:53,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-28 03:03:53,396 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2020-11-28 03:03:53,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-28 03:03:53,397 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:53,397 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:53,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-28 03:03:53,603 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:03:53,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:53,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1359238087, now seen corresponding path program 13 times [2020-11-28 03:03:53,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:53,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003604203] [2020-11-28 03:03:53,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:53,613 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:03:53,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897715663] [2020-11-28 03:03:53,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:53,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:53,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-28 03:03:53,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:03:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:03:53,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003604203] [2020-11-28 03:03:53,930 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:03:53,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897715663] [2020-11-28 03:03:53,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:03:53,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-11-28 03:03:53,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917323066] [2020-11-28 03:03:53,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-28 03:03:53,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:53,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-28 03:03:53,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-11-28 03:03:53,932 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand 17 states. [2020-11-28 03:03:54,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:54,196 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2020-11-28 03:03:54,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-28 03:03:54,197 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-11-28 03:03:54,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:54,198 INFO L225 Difference]: With dead ends: 86 [2020-11-28 03:03:54,198 INFO L226 Difference]: Without dead ends: 82 [2020-11-28 03:03:54,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2020-11-28 03:03:54,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-28 03:03:54,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-11-28 03:03:54,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-28 03:03:54,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2020-11-28 03:03:54,206 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 76 [2020-11-28 03:03:54,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:54,206 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2020-11-28 03:03:54,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-28 03:03:54,207 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2020-11-28 03:03:54,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-28 03:03:54,207 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:54,208 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:54,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-28 03:03:54,408 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:03:54,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:54,409 INFO L82 PathProgramCache]: Analyzing trace with hash -665753236, now seen corresponding path program 14 times [2020-11-28 03:03:54,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:54,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592253035] [2020-11-28 03:03:54,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:54,423 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:03:54,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1393555391] [2020-11-28 03:03:54,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:54,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:03:54,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:03:54,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-28 03:03:54,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:03:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:03:54,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592253035] [2020-11-28 03:03:54,778 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:03:54,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393555391] [2020-11-28 03:03:54,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:03:54,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-11-28 03:03:54,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706041622] [2020-11-28 03:03:54,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-28 03:03:54,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:54,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-28 03:03:54,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-11-28 03:03:54,781 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand 18 states. [2020-11-28 03:03:55,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:55,094 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2020-11-28 03:03:55,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-28 03:03:55,094 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-11-28 03:03:55,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:55,095 INFO L225 Difference]: With dead ends: 91 [2020-11-28 03:03:55,095 INFO L226 Difference]: Without dead ends: 87 [2020-11-28 03:03:55,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2020-11-28 03:03:55,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-28 03:03:55,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-11-28 03:03:55,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-11-28 03:03:55,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2020-11-28 03:03:55,103 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 81 [2020-11-28 03:03:55,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:55,104 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2020-11-28 03:03:55,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-28 03:03:55,104 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2020-11-28 03:03:55,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-28 03:03:55,105 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:55,105 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:55,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-28 03:03:55,305 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:03:55,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:55,306 INFO L82 PathProgramCache]: Analyzing trace with hash 386987033, now seen corresponding path program 15 times [2020-11-28 03:03:55,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:55,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027000641] [2020-11-28 03:03:55,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:55,314 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:03:55,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8023460] [2020-11-28 03:03:55,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:55,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-11-28 03:03:55,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:03:55,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-28 03:03:55,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:03:55,885 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:03:55,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027000641] [2020-11-28 03:03:55,885 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:03:55,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8023460] [2020-11-28 03:03:55,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:03:55,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-11-28 03:03:55,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946204406] [2020-11-28 03:03:55,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-28 03:03:55,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:55,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-28 03:03:55,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-11-28 03:03:55,888 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand 19 states. [2020-11-28 03:03:56,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:56,202 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2020-11-28 03:03:56,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-28 03:03:56,202 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 86 [2020-11-28 03:03:56,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:56,203 INFO L225 Difference]: With dead ends: 96 [2020-11-28 03:03:56,203 INFO L226 Difference]: Without dead ends: 92 [2020-11-28 03:03:56,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2020-11-28 03:03:56,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-11-28 03:03:56,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-11-28 03:03:56,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-11-28 03:03:56,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2020-11-28 03:03:56,210 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 86 [2020-11-28 03:03:56,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:56,210 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2020-11-28 03:03:56,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-28 03:03:56,210 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2020-11-28 03:03:56,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-28 03:03:56,211 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:56,211 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:56,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:56,411 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:03:56,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:56,412 INFO L82 PathProgramCache]: Analyzing trace with hash -609350260, now seen corresponding path program 16 times [2020-11-28 03:03:56,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:56,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532978382] [2020-11-28 03:03:56,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:56,421 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:03:56,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [693700123] [2020-11-28 03:03:56,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:56,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 03:03:56,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:03:56,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-28 03:03:56,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:03:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:03:56,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532978382] [2020-11-28 03:03:56,838 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:03:56,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693700123] [2020-11-28 03:03:56,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:03:56,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-11-28 03:03:56,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174975548] [2020-11-28 03:03:56,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-28 03:03:56,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:56,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-28 03:03:56,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-11-28 03:03:56,841 INFO L87 Difference]: Start difference. First operand 92 states and 108 transitions. Second operand 20 states. [2020-11-28 03:03:57,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:57,215 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2020-11-28 03:03:57,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-28 03:03:57,216 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2020-11-28 03:03:57,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:57,217 INFO L225 Difference]: With dead ends: 101 [2020-11-28 03:03:57,217 INFO L226 Difference]: Without dead ends: 97 [2020-11-28 03:03:57,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2020-11-28 03:03:57,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-11-28 03:03:57,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-11-28 03:03:57,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-28 03:03:57,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2020-11-28 03:03:57,225 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 91 [2020-11-28 03:03:57,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:57,225 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2020-11-28 03:03:57,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-28 03:03:57,226 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2020-11-28 03:03:57,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-28 03:03:57,227 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:57,227 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:57,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:57,444 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:03:57,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:57,445 INFO L82 PathProgramCache]: Analyzing trace with hash -560602119, now seen corresponding path program 17 times [2020-11-28 03:03:57,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:57,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309923427] [2020-11-28 03:03:57,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:57,455 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:03:57,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1576359814] [2020-11-28 03:03:57,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:57,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-11-28 03:03:57,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:03:57,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-28 03:03:57,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:03:58,029 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:03:58,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309923427] [2020-11-28 03:03:58,030 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:03:58,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576359814] [2020-11-28 03:03:58,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:03:58,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-11-28 03:03:58,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904538757] [2020-11-28 03:03:58,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-28 03:03:58,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:58,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-28 03:03:58,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-11-28 03:03:58,032 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand 21 states. [2020-11-28 03:03:58,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:58,379 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2020-11-28 03:03:58,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-28 03:03:58,379 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-11-28 03:03:58,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:58,380 INFO L225 Difference]: With dead ends: 106 [2020-11-28 03:03:58,380 INFO L226 Difference]: Without dead ends: 102 [2020-11-28 03:03:58,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2020-11-28 03:03:58,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-11-28 03:03:58,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-11-28 03:03:58,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-11-28 03:03:58,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 120 transitions. [2020-11-28 03:03:58,388 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 120 transitions. Word has length 96 [2020-11-28 03:03:58,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:58,389 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 120 transitions. [2020-11-28 03:03:58,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-28 03:03:58,389 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 120 transitions. [2020-11-28 03:03:58,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-28 03:03:58,390 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:58,390 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:58,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-28 03:03:58,608 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:03:58,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:58,609 INFO L82 PathProgramCache]: Analyzing trace with hash 2065959340, now seen corresponding path program 18 times [2020-11-28 03:03:58,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:58,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950675270] [2020-11-28 03:03:58,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:58,616 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:03:58,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995772106] [2020-11-28 03:03:58,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:03:58,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-11-28 03:03:58,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:03:58,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-28 03:03:58,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:03:59,220 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:03:59,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950675270] [2020-11-28 03:03:59,220 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:03:59,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995772106] [2020-11-28 03:03:59,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:03:59,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-11-28 03:03:59,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590057396] [2020-11-28 03:03:59,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-28 03:03:59,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:59,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-28 03:03:59,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-11-28 03:03:59,223 INFO L87 Difference]: Start difference. First operand 102 states and 120 transitions. Second operand 22 states. [2020-11-28 03:03:59,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:59,673 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2020-11-28 03:03:59,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-28 03:03:59,676 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 101 [2020-11-28 03:03:59,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:59,677 INFO L225 Difference]: With dead ends: 111 [2020-11-28 03:03:59,677 INFO L226 Difference]: Without dead ends: 107 [2020-11-28 03:03:59,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2020-11-28 03:03:59,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-28 03:03:59,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-11-28 03:03:59,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-11-28 03:03:59,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2020-11-28 03:03:59,684 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 101 [2020-11-28 03:03:59,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:59,684 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2020-11-28 03:03:59,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-28 03:03:59,685 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2020-11-28 03:03:59,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-28 03:03:59,685 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:59,686 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:59,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-28 03:03:59,900 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:03:59,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:59,901 INFO L82 PathProgramCache]: Analyzing trace with hash -602375207, now seen corresponding path program 19 times [2020-11-28 03:03:59,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:59,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306209602] [2020-11-28 03:03:59,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:59,910 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:03:59,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1160274157] [2020-11-28 03:03:59,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:04:00,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:00,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-28 03:04:00,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:04:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:00,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306209602] [2020-11-28 03:04:00,385 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:04:00,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160274157] [2020-11-28 03:04:00,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:04:00,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-11-28 03:04:00,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129854952] [2020-11-28 03:04:00,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-28 03:04:00,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:00,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-28 03:04:00,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-11-28 03:04:00,387 INFO L87 Difference]: Start difference. First operand 107 states and 126 transitions. Second operand 23 states. [2020-11-28 03:04:00,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:00,927 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2020-11-28 03:04:00,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-28 03:04:00,929 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 106 [2020-11-28 03:04:00,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:00,930 INFO L225 Difference]: With dead ends: 116 [2020-11-28 03:04:00,930 INFO L226 Difference]: Without dead ends: 112 [2020-11-28 03:04:00,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2020-11-28 03:04:00,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-28 03:04:00,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-11-28 03:04:00,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-11-28 03:04:00,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 132 transitions. [2020-11-28 03:04:00,938 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 132 transitions. Word has length 106 [2020-11-28 03:04:00,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:00,939 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 132 transitions. [2020-11-28 03:04:00,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-28 03:04:00,939 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 132 transitions. [2020-11-28 03:04:00,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-28 03:04:00,940 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:00,940 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:04:01,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:04:01,141 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:04:01,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:01,141 INFO L82 PathProgramCache]: Analyzing trace with hash -924492340, now seen corresponding path program 20 times [2020-11-28 03:04:01,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:01,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684559775] [2020-11-28 03:04:01,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:01,149 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:04:01,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825626183] [2020-11-28 03:04:01,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:04:01,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:04:01,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-11-28 03:04:01,254 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:04:01,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:04:01,301 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:04:01,415 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:04:01,416 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 03:04:01,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-28 03:04:01,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:04:01 BoogieIcfgContainer [2020-11-28 03:04:01,763 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:04:01,763 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:04:01,763 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:04:01,763 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:04:01,764 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:03:43" (3/4) ... [2020-11-28 03:04:01,765 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 03:04:01,893 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_630334c7-af82-4c65-9ecf-3a86337c1146/bin/uautomizer/witness.graphml [2020-11-28 03:04:01,894 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:04:01,895 INFO L168 Benchmark]: Toolchain (without parser) took 19714.16 ms. Allocated memory was 75.5 MB in the beginning and 197.1 MB in the end (delta: 121.6 MB). Free memory was 40.1 MB in the beginning and 67.9 MB in the end (delta: -27.7 MB). Peak memory consumption was 93.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:01,896 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 75.5 MB. Free memory was 56.2 MB in the beginning and 56.2 MB in the end (delta: 39.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:04:01,897 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.51 ms. Allocated memory was 75.5 MB in the beginning and 92.3 MB in the end (delta: 16.8 MB). Free memory was 40.0 MB in the beginning and 70.5 MB in the end (delta: -30.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:01,897 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.83 ms. Allocated memory is still 92.3 MB. Free memory was 70.5 MB in the beginning and 69.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:01,898 INFO L168 Benchmark]: Boogie Preprocessor took 40.41 ms. Allocated memory is still 92.3 MB. Free memory was 69.0 MB in the beginning and 67.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:04:01,898 INFO L168 Benchmark]: RCFGBuilder took 551.26 ms. Allocated memory is still 92.3 MB. Free memory was 67.9 MB in the beginning and 54.7 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:01,899 INFO L168 Benchmark]: TraceAbstraction took 18613.39 ms. Allocated memory was 92.3 MB in the beginning and 197.1 MB in the end (delta: 104.9 MB). Free memory was 54.3 MB in the beginning and 76.3 MB in the end (delta: -22.0 MB). Peak memory consumption was 83.2 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:01,899 INFO L168 Benchmark]: Witness Printer took 130.84 ms. Allocated memory is still 197.1 MB. Free memory was 76.3 MB in the beginning and 67.9 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:01,902 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 75.5 MB. Free memory was 56.2 MB in the beginning and 56.2 MB in the end (delta: 39.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 326.51 ms. Allocated memory was 75.5 MB in the beginning and 92.3 MB in the end (delta: 16.8 MB). Free memory was 40.0 MB in the beginning and 70.5 MB in the end (delta: -30.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.83 ms. Allocated memory is still 92.3 MB. Free memory was 70.5 MB in the beginning and 69.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.41 ms. Allocated memory is still 92.3 MB. Free memory was 69.0 MB in the beginning and 67.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 551.26 ms. Allocated memory is still 92.3 MB. Free memory was 67.9 MB in the beginning and 54.7 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 18613.39 ms. Allocated memory was 92.3 MB in the beginning and 197.1 MB in the end (delta: 104.9 MB). Free memory was 54.3 MB in the beginning and 76.3 MB in the end (delta: -22.0 MB). Peak memory consumption was 83.2 MB. Max. memory is 16.1 GB. * Witness Printer took 130.84 ms. Allocated memory is still 197.1 MB. Free memory was 76.3 MB in the beginning and 67.9 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_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++<20 [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++<20 [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++<20 [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++<20 [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++<20 [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 TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=6] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=6] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=6] [L36] EXPR counter++ VAL [counter=7] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=7] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=7] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=7] [L36] EXPR counter++ VAL [counter=8] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=8] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=8] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=8] [L36] EXPR counter++ VAL [counter=9] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=9] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=9] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=9] [L36] EXPR counter++ VAL [counter=10] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=10] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=10] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=10] [L36] EXPR counter++ VAL [counter=11] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=11] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=11] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=11] [L36] EXPR counter++ VAL [counter=12] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=12] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=12] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=12] [L36] EXPR counter++ VAL [counter=13] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=13] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=13] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=13] [L36] EXPR counter++ VAL [counter=14] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=14] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=14] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=14] [L36] EXPR counter++ VAL [counter=15] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=15] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=15] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=15] [L36] EXPR counter++ VAL [counter=16] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=16] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=16] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=16] [L36] EXPR counter++ VAL [counter=17] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=17] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=17] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=17] [L36] EXPR counter++ VAL [counter=18] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=18] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=18] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=18] [L36] EXPR counter++ VAL [counter=19] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=19] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=19] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=19] [L36] EXPR counter++ VAL [counter=20] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=20] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=20] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=20] [L36] EXPR counter++ VAL [counter=21] [L36] COND FALSE !(counter++<20) [L16] COND TRUE !(cond) VAL [counter=21] [L9] __assert_fail("0", "mannadiv.c", 9, "reach_error") VAL [counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 18.4s, OverallIterations: 24, TraceHistogramMax: 21, AutomataDifference: 5.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 330 SDtfs, 482 SDslu, 1585 SDs, 0 SdLazy, 599 SolverSat, 49 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1370 GetRequests, 936 SyntacticMatches, 0 SemanticMatches, 434 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 6.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112occurred in iteration=23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 23 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 1314 NumberOfCodeBlocks, 1314 NumberOfCodeBlocksAsserted, 127 NumberOfCheckSat, 1180 ConstructedInterpolants, 0 QuantifiedInterpolants, 242550 SizeOfPredicates, 208 NumberOfNonLiveVariables, 5135 ConjunctsInSsa, 464 ConjunctsInUnsatCore, 23 InterpolantComputations, 4 PerfectInterpolantSequences, 0/6080 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...