./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/sum_natnum.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/sum_natnum.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8 --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 ff2ea40d6d25fb86e36a6b6b626bedee46fbbe211877b096a26da0b150125568 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 13:43:08,154 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:43:08,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:43:08,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:43:08,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:43:08,168 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:43:08,169 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:43:08,170 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:43:08,171 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:43:08,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:43:08,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:43:08,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:43:08,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:43:08,174 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:43:08,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:43:08,175 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:43:08,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:43:08,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:43:08,178 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:43:08,179 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:43:08,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:43:08,181 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:43:08,181 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:43:08,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:43:08,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:43:08,184 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:43:08,184 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:43:08,185 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:43:08,185 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:43:08,186 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:43:08,186 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:43:08,187 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:43:08,187 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:43:08,188 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:43:08,188 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:43:08,188 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:43:08,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:43:08,189 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:43:08,189 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:43:08,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:43:08,190 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:43:08,191 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 13:43:08,208 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:43:08,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:43:08,208 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:43:08,208 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:43:08,209 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:43:08,209 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:43:08,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:43:08,214 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:43:08,214 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:43:08,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:43:08,214 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:43:08,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:43:08,214 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:43:08,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:43:08,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 13:43:08,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:43:08,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 13:43:08,215 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:43:08,215 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 13:43:08,215 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:43:08,215 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 13:43:08,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:43:08,216 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:43:08,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:43:08,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:43:08,216 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:43:08,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:43:08,216 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 13:43:08,216 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:43:08,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 13:43:08,217 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:43:08,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 13:43:08,217 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:43:08,217 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:43:08,217 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:43:08,217 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff2ea40d6d25fb86e36a6b6b626bedee46fbbe211877b096a26da0b150125568 [2022-12-13 13:43:08,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:43:08,392 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:43:08,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:43:08,395 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:43:08,395 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:43:08,396 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/loops-crafted-1/sum_natnum.c [2022-12-13 13:43:10,950 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:43:11,106 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:43:11,106 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/sv-benchmarks/c/loops-crafted-1/sum_natnum.c [2022-12-13 13:43:11,110 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/data/586211221/66a623b3d3594d3f95eb2b6b0f4d8a86/FLAGaa882a380 [2022-12-13 13:43:11,528 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/data/586211221/66a623b3d3594d3f95eb2b6b0f4d8a86 [2022-12-13 13:43:11,530 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:43:11,531 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:43:11,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:43:11,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:43:11,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:43:11,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:43:11" (1/1) ... [2022-12-13 13:43:11,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57dc9b2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:43:11, skipping insertion in model container [2022-12-13 13:43:11,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:43:11" (1/1) ... [2022-12-13 13:43:11,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:43:11,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:43:11,648 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/sv-benchmarks/c/loops-crafted-1/sum_natnum.c[458,471] [2022-12-13 13:43:11,654 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:43:11,662 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:43:11,670 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/sv-benchmarks/c/loops-crafted-1/sum_natnum.c[458,471] [2022-12-13 13:43:11,672 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:43:11,681 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:43:11,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:43:11 WrapperNode [2022-12-13 13:43:11,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:43:11,683 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:43:11,683 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:43:11,683 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:43:11,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:43:11" (1/1) ... [2022-12-13 13:43:11,693 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:43:11" (1/1) ... [2022-12-13 13:43:11,703 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 30 [2022-12-13 13:43:11,704 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:43:11,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:43:11,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:43:11,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:43:11,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:43:11" (1/1) ... [2022-12-13 13:43:11,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:43:11" (1/1) ... [2022-12-13 13:43:11,711 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:43:11" (1/1) ... [2022-12-13 13:43:11,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:43:11" (1/1) ... [2022-12-13 13:43:11,713 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:43:11" (1/1) ... [2022-12-13 13:43:11,715 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:43:11" (1/1) ... [2022-12-13 13:43:11,716 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:43:11" (1/1) ... [2022-12-13 13:43:11,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:43:11" (1/1) ... [2022-12-13 13:43:11,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:43:11,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:43:11,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:43:11,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:43:11,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:43:11" (1/1) ... [2022-12-13 13:43:11,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:43:11,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:43:11,740 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:43:11,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:43:11,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:43:11,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 13:43:11,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:43:11,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:43:11,828 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:43:11,830 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:43:11,905 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:43:11,909 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:43:11,909 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 13:43:11,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:43:11 BoogieIcfgContainer [2022-12-13 13:43:11,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:43:11,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:43:11,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:43:11,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:43:11,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:43:11" (1/3) ... [2022-12-13 13:43:11,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d0fed7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:43:11, skipping insertion in model container [2022-12-13 13:43:11,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:43:11" (2/3) ... [2022-12-13 13:43:11,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d0fed7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:43:11, skipping insertion in model container [2022-12-13 13:43:11,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:43:11" (3/3) ... [2022-12-13 13:43:11,917 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_natnum.c [2022-12-13 13:43:11,931 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:43:11,931 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 13:43:11,964 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:43:11,968 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@59af672d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:43:11,968 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 13:43:11,971 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:11,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 13:43:11,977 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:43:11,978 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 13:43:11,978 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:43:11,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:43:11,982 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2022-12-13 13:43:11,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:43:11,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607350189] [2022-12-13 13:43:11,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:43:11,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:43:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:43:12,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:43:12,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607350189] [2022-12-13 13:43:12,070 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-13 13:43:12,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800707285] [2022-12-13 13:43:12,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:43:12,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:43:12,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:43:12,072 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:43:12,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 13:43:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:43:12,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:43:12,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:43:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:43:12,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:43:12,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800707285] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:43:12,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:43:12,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:43:12,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611350760] [2022-12-13 13:43:12,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:43:12,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:43:12,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:43:12,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:43:12,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:43:12,210 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:14,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 13:43:14,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:43:14,238 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2022-12-13 13:43:14,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:43:14,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 13:43:14,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:43:14,253 INFO L225 Difference]: With dead ends: 20 [2022-12-13 13:43:14,253 INFO L226 Difference]: Without dead ends: 8 [2022-12-13 13:43:14,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:43:14,257 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:43:14,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-12-13 13:43:14,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-12-13 13:43:14,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-12-13 13:43:14,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:14,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2022-12-13 13:43:14,279 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2022-12-13 13:43:14,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:43:14,279 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2022-12-13 13:43:14,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:14,280 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2022-12-13 13:43:14,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 13:43:14,280 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:43:14,280 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:43:14,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 13:43:14,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-13 13:43:14,483 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:43:14,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:43:14,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2022-12-13 13:43:14,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:43:14,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062831270] [2022-12-13 13:43:14,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:43:14,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:43:14,519 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 13:43:14,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1164383065] [2022-12-13 13:43:14,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:43:14,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:43:14,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:43:14,522 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:43:14,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 13:43:14,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:43:14,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 13:43:14,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:43:14,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:43:14,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:43:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:43:14,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:43:14,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062831270] [2022-12-13 13:43:14,635 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 13:43:14,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164383065] [2022-12-13 13:43:14,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164383065] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:43:14,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:43:14,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-12-13 13:43:14,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589171175] [2022-12-13 13:43:14,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:43:14,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 13:43:14,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:43:14,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 13:43:14,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:43:14,643 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:16,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 13:43:16,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:43:16,677 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2022-12-13 13:43:16,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 13:43:16,680 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-13 13:43:16,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:43:16,681 INFO L225 Difference]: With dead ends: 15 [2022-12-13 13:43:16,681 INFO L226 Difference]: Without dead ends: 11 [2022-12-13 13:43:16,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-13 13:43:16,682 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:43:16,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 8 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-12-13 13:43:16,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-12-13 13:43:16,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-12-13 13:43:16,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:16,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2022-12-13 13:43:16,687 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2022-12-13 13:43:16,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:43:16,687 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2022-12-13 13:43:16,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:16,687 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2022-12-13 13:43:16,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 13:43:16,687 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:43:16,687 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 13:43:16,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 13:43:16,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-13 13:43:16,890 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:43:16,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:43:16,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 2 times [2022-12-13 13:43:16,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:43:16,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703672744] [2022-12-13 13:43:16,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:43:16,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:43:16,938 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 13:43:16,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342109511] [2022-12-13 13:43:16,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:43:16,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:43:16,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:43:16,940 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:43:16,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 13:43:16,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:43:16,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:43:16,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 13:43:16,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:43:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:43:17,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:43:17,099 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:43:17,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:43:17,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703672744] [2022-12-13 13:43:17,099 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 13:43:17,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342109511] [2022-12-13 13:43:17,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342109511] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:43:17,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:43:17,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-12-13 13:43:17,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631381385] [2022-12-13 13:43:17,100 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:43:17,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 13:43:17,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:43:17,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 13:43:17,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-12-13 13:43:17,102 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:19,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 13:43:19,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:43:19,176 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2022-12-13 13:43:19,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 13:43:19,178 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-13 13:43:19,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:43:19,178 INFO L225 Difference]: With dead ends: 21 [2022-12-13 13:43:19,178 INFO L226 Difference]: Without dead ends: 17 [2022-12-13 13:43:19,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-12-13 13:43:19,179 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:43:19,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 10 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-12-13 13:43:19,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-13 13:43:19,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-12-13 13:43:19,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:19,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-12-13 13:43:19,183 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2022-12-13 13:43:19,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:43:19,183 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-12-13 13:43:19,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:19,183 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-12-13 13:43:19,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-13 13:43:19,183 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:43:19,183 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-12-13 13:43:19,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 13:43:19,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:43:19,385 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:43:19,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:43:19,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1628318539, now seen corresponding path program 3 times [2022-12-13 13:43:19,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:43:19,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100766159] [2022-12-13 13:43:19,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:43:19,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:43:19,427 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 13:43:19,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271398209] [2022-12-13 13:43:19,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:43:19,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:43:19,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:43:19,429 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:43:19,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 13:43:19,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 13:43:19,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:43:19,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 13:43:19,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:43:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:43:19,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:43:19,775 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:43:19,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:43:19,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100766159] [2022-12-13 13:43:19,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 13:43:19,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271398209] [2022-12-13 13:43:19,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271398209] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:43:19,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:43:19,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-12-13 13:43:19,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762874527] [2022-12-13 13:43:19,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:43:19,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 13:43:19,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:43:19,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 13:43:19,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-12-13 13:43:19,779 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:21,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 13:43:21,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:43:21,973 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2022-12-13 13:43:21,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 13:43:21,975 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-13 13:43:21,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:43:21,976 INFO L225 Difference]: With dead ends: 33 [2022-12-13 13:43:21,976 INFO L226 Difference]: Without dead ends: 29 [2022-12-13 13:43:21,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 13:43:21,977 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 28 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:43:21,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 12 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-12-13 13:43:21,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-13 13:43:21,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-12-13 13:43:21,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:21,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2022-12-13 13:43:21,981 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 16 [2022-12-13 13:43:21,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:43:21,982 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2022-12-13 13:43:21,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:21,982 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2022-12-13 13:43:21,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 13:43:21,982 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:43:21,982 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-12-13 13:43:21,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 13:43:22,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:43:22,183 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:43:22,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:43:22,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1394044683, now seen corresponding path program 4 times [2022-12-13 13:43:22,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:43:22,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82350324] [2022-12-13 13:43:22,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:43:22,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:43:22,214 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 13:43:22,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509152713] [2022-12-13 13:43:22,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 13:43:22,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:43:22,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:43:22,215 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:43:22,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 13:43:22,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 13:43:22,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:43:22,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 13:43:22,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:43:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:43:22,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:43:23,039 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:43:23,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:43:23,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82350324] [2022-12-13 13:43:23,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 13:43:23,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509152713] [2022-12-13 13:43:23,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509152713] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:43:23,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:43:23,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2022-12-13 13:43:23,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930889208] [2022-12-13 13:43:23,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:43:23,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-13 13:43:23,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:43:23,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-13 13:43:23,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-12-13 13:43:23,043 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 50 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:25,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 13:43:25,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:43:25,675 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2022-12-13 13:43:25,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-13 13:43:25,677 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-12-13 13:43:25,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:43:25,678 INFO L225 Difference]: With dead ends: 57 [2022-12-13 13:43:25,678 INFO L226 Difference]: Without dead ends: 53 [2022-12-13 13:43:25,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2022-12-13 13:43:25,681 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 52 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:43:25,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 18 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-12-13 13:43:25,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-13 13:43:25,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-12-13 13:43:25,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:25,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2022-12-13 13:43:25,691 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 28 [2022-12-13 13:43:25,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:43:25,691 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2022-12-13 13:43:25,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:25,692 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2022-12-13 13:43:25,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-13 13:43:25,692 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:43:25,693 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1] [2022-12-13 13:43:25,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 13:43:25,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:43:25,894 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:43:25,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:43:25,896 INFO L85 PathProgramCache]: Analyzing trace with hash 469964427, now seen corresponding path program 5 times [2022-12-13 13:43:25,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:43:25,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735929475] [2022-12-13 13:43:25,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:43:25,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:43:25,935 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 13:43:25,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [890102662] [2022-12-13 13:43:25,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 13:43:25,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:43:25,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:43:25,936 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:43:25,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 13:43:25,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-12-13 13:43:25,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:43:26,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 13:43:26,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:43:26,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:43:26,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:43:28,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:43:28,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:43:28,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735929475] [2022-12-13 13:43:28,163 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 13:43:28,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890102662] [2022-12-13 13:43:28,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890102662] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:43:28,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:43:28,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2022-12-13 13:43:28,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606820803] [2022-12-13 13:43:28,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:43:28,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-12-13 13:43:28,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:43:28,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-12-13 13:43:28,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2022-12-13 13:43:28,168 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 98 states, 98 states have (on average 1.030612244897959) internal successors, (101), 97 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:32,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 13:43:32,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:43:32,238 INFO L93 Difference]: Finished difference Result 105 states and 152 transitions. [2022-12-13 13:43:32,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-12-13 13:43:32,239 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.030612244897959) internal successors, (101), 97 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-12-13 13:43:32,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:43:32,240 INFO L225 Difference]: With dead ends: 105 [2022-12-13 13:43:32,240 INFO L226 Difference]: Without dead ends: 101 [2022-12-13 13:43:32,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2022-12-13 13:43:32,244 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 100 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:43:32,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 20 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-12-13 13:43:32,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-12-13 13:43:32,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-12-13 13:43:32,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:32,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2022-12-13 13:43:32,255 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 52 [2022-12-13 13:43:32,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:43:32,256 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2022-12-13 13:43:32,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.030612244897959) internal successors, (101), 97 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:32,256 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2022-12-13 13:43:32,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-13 13:43:32,257 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:43:32,257 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1] [2022-12-13 13:43:32,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 13:43:32,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:43:32,459 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:43:32,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:43:32,460 INFO L85 PathProgramCache]: Analyzing trace with hash -578886261, now seen corresponding path program 6 times [2022-12-13 13:43:32,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:43:32,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745585792] [2022-12-13 13:43:32,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:43:32,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:43:32,531 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 13:43:32,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001423639] [2022-12-13 13:43:32,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 13:43:32,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:43:32,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:43:32,532 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:43:32,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 13:43:32,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2022-12-13 13:43:32,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:43:32,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 97 conjunts are in the unsatisfiable core [2022-12-13 13:43:32,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:43:35,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:43:35,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:43:41,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:43:41,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:43:41,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745585792] [2022-12-13 13:43:41,083 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 13:43:41,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001423639] [2022-12-13 13:43:41,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001423639] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:43:41,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:43:41,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 193 [2022-12-13 13:43:41,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917244959] [2022-12-13 13:43:41,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:43:41,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-12-13 13:43:41,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:43:41,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-12-13 13:43:41,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18531, Invalid=18911, Unknown=0, NotChecked=0, Total=37442 [2022-12-13 13:43:41,092 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 194 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 193 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:50,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 13:43:50,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:43:50,163 INFO L93 Difference]: Finished difference Result 201 states and 296 transitions. [2022-12-13 13:43:50,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-12-13 13:43:50,166 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 193 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2022-12-13 13:43:50,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:43:50,167 INFO L225 Difference]: With dead ends: 201 [2022-12-13 13:43:50,167 INFO L226 Difference]: Without dead ends: 197 [2022-12-13 13:43:50,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18145 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=36961, Invalid=46271, Unknown=0, NotChecked=0, Total=83232 [2022-12-13 13:43:50,173 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 98 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:43:50,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 18 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 202 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-12-13 13:43:50,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-12-13 13:43:50,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2022-12-13 13:43:50,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.0051020408163265) internal successors, (197), 196 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:50,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2022-12-13 13:43:50,186 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 100 [2022-12-13 13:43:50,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:43:50,186 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2022-12-13 13:43:50,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 193 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:50,186 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2022-12-13 13:43:50,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-12-13 13:43:50,190 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:43:50,190 INFO L195 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1, 1] [2022-12-13 13:43:50,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 13:43:50,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:43:50,392 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:43:50,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:43:50,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1056406645, now seen corresponding path program 7 times [2022-12-13 13:43:50,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:43:50,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596495873] [2022-12-13 13:43:50,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:43:50,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:43:50,480 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 13:43:50,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [339884792] [2022-12-13 13:43:50,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 13:43:50,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:43:50,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:43:50,482 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:43:50,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 13:43:50,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:43:50,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 193 conjunts are in the unsatisfiable core [2022-12-13 13:43:50,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:44:00,991 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:44:00,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:44:21,345 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:44:21,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:44:21,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596495873] [2022-12-13 13:44:21,345 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 13:44:21,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339884792] [2022-12-13 13:44:21,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339884792] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:44:21,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:44:21,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193] total 385 [2022-12-13 13:44:21,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692413855] [2022-12-13 13:44:21,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:44:21,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 386 states [2022-12-13 13:44:21,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:44:21,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 386 interpolants. [2022-12-13 13:44:21,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73923, Invalid=74687, Unknown=0, NotChecked=0, Total=148610 [2022-12-13 13:44:21,365 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand has 386 states, 386 states have (on average 1.0077720207253886) internal successors, (389), 385 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:44:55,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 13:44:55,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:44:55,026 INFO L93 Difference]: Finished difference Result 393 states and 584 transitions. [2022-12-13 13:44:55,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 385 states. [2022-12-13 13:44:55,027 INFO L78 Accepts]: Start accepts. Automaton has has 386 states, 386 states have (on average 1.0077720207253886) internal successors, (389), 385 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2022-12-13 13:44:55,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:44:55,029 INFO L225 Difference]: With dead ends: 393 [2022-12-13 13:44:55,029 INFO L226 Difference]: Without dead ends: 389 [2022-12-13 13:44:55,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 575 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73153 ImplicationChecksByTransitivity, 59.8s TimeCoverageRelationStatistics Valid=147649, Invalid=184703, Unknown=0, NotChecked=0, Total=332352 [2022-12-13 13:44:55,046 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 194 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-13 13:44:55,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 20 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 396 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-12-13 13:44:55,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-12-13 13:44:55,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 389. [2022-12-13 13:44:55,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.0025773195876289) internal successors, (389), 388 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:44:55,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 389 transitions. [2022-12-13 13:44:55,082 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 389 transitions. Word has length 196 [2022-12-13 13:44:55,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:44:55,082 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 389 transitions. [2022-12-13 13:44:55,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 386 states, 386 states have (on average 1.0077720207253886) internal successors, (389), 385 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:44:55,083 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 389 transitions. [2022-12-13 13:44:55,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2022-12-13 13:44:55,087 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:44:55,087 INFO L195 NwaCegarLoop]: trace histogram [382, 1, 1, 1, 1, 1, 1] [2022-12-13 13:44:55,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 13:44:55,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:44:55,289 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:44:55,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:44:55,291 INFO L85 PathProgramCache]: Analyzing trace with hash 442744715, now seen corresponding path program 8 times [2022-12-13 13:44:55,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:44:55,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686679034] [2022-12-13 13:44:55,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:44:55,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:44:55,389 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 13:44:55,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90681078] [2022-12-13 13:44:55,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:44:55,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:44:55,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:44:55,391 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:44:55,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 13:44:55,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:44:55,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:44:55,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 1949 conjuncts, 385 conjunts are in the unsatisfiable core [2022-12-13 13:44:55,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:45:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:45:37,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:47:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:47:00,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:47:00,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686679034] [2022-12-13 13:47:00,471 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 13:47:00,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90681078] [2022-12-13 13:47:00,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90681078] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:47:00,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:47:00,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [385, 385] total 769 [2022-12-13 13:47:00,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74835164] [2022-12-13 13:47:00,472 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:47:00,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 770 states [2022-12-13 13:47:00,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:47:00,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 770 interpolants. [2022-12-13 13:47:00,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295299, Invalid=296831, Unknown=0, NotChecked=0, Total=592130 [2022-12-13 13:47:00,557 INFO L87 Difference]: Start difference. First operand 389 states and 389 transitions. Second operand has 770 states, 770 states have (on average 1.0038961038961038) internal successors, (773), 769 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:49:16,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 13:49:16,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:49:16,486 INFO L93 Difference]: Finished difference Result 777 states and 1160 transitions. [2022-12-13 13:49:16,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 769 states. [2022-12-13 13:49:16,490 INFO L78 Accepts]: Start accepts. Automaton has has 770 states, 770 states have (on average 1.0038961038961038) internal successors, (773), 769 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 388 [2022-12-13 13:49:16,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:49:16,492 INFO L225 Difference]: With dead ends: 777 [2022-12-13 13:49:16,492 INFO L226 Difference]: Without dead ends: 773 [2022-12-13 13:49:16,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1157 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293761 ImplicationChecksByTransitivity, 243.8s TimeCoverageRelationStatistics Valid=590209, Invalid=738047, Unknown=0, NotChecked=0, Total=1328256 [2022-12-13 13:49:16,584 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 772 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:49:16,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [772 Valid, 14 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 776 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-12-13 13:49:16,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-12-13 13:49:16,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 773. [2022-12-13 13:49:16,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 1.0012953367875648) internal successors, (773), 772 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:49:16,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 773 transitions. [2022-12-13 13:49:16,619 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 773 transitions. Word has length 388 [2022-12-13 13:49:16,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:49:16,619 INFO L495 AbstractCegarLoop]: Abstraction has 773 states and 773 transitions. [2022-12-13 13:49:16,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 770 states, 770 states have (on average 1.0038961038961038) internal successors, (773), 769 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:49:16,620 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 773 transitions. [2022-12-13 13:49:16,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 773 [2022-12-13 13:49:16,656 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:49:16,656 INFO L195 NwaCegarLoop]: trace histogram [766, 1, 1, 1, 1, 1, 1] [2022-12-13 13:49:16,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 13:49:16,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:49:16,858 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:49:16,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:49:16,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1774569589, now seen corresponding path program 9 times [2022-12-13 13:49:16,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:49:16,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767744365] [2022-12-13 13:49:16,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:49:16,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:49:17,002 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 13:49:17,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245759328] [2022-12-13 13:49:17,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:49:17,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:49:17,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:49:17,003 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:49:17,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8671a2a-6b90-4293-9aaf-79f3c2af974d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 13:49:24,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 384 check-sat command(s) [2022-12-13 13:49:24,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:49:24,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 3869 conjuncts, 769 conjunts are in the unsatisfiable core [2022-12-13 13:49:24,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:52:20,111 INFO L134 CoverageAnalysis]: Checked inductivity of 293761 backedges. 0 proven. 293761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:52:20,112 INFO L328 TraceCheckSpWp]: Computing backward predicates...