./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 26517bdd67184dea6352cf50b6d9992d41ecfd853675bfc685354b90b7b5bf40 --- 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-5e519f3 [2022-11-03 04:00:17,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:00:17,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:00:17,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:00:17,189 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:00:17,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:00:17,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:00:17,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:00:17,203 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:00:17,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:00:17,206 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:00:17,207 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:00:17,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:00:17,213 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:00:17,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:00:17,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:00:17,219 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:00:17,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:00:17,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:00:17,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:00:17,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:00:17,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:00:17,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:00:17,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:00:17,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:00:17,247 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:00:17,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:00:17,248 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:00:17,250 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:00:17,251 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:00:17,252 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:00:17,253 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:00:17,255 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:00:17,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:00:17,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:00:17,259 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:00:17,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:00:17,260 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:00:17,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:00:17,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:00:17,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:00:17,263 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 04:00:17,310 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:00:17,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:00:17,311 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:00:17,311 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:00:17,313 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:00:17,313 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:00:17,313 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:00:17,313 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:00:17,313 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:00:17,314 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 04:00:17,315 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:00:17,315 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:00:17,315 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 04:00:17,315 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 04:00:17,316 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:00:17,316 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 04:00:17,316 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 04:00:17,316 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 04:00:17,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:00:17,317 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 04:00:17,317 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 04:00:17,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 04:00:17,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:00:17,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:00:17,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:00:17,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:00:17,319 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 04:00:17,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:00:17,320 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:00:17,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:00:17,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:00:17,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:00:17,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:00:17,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:00:17,321 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 04:00:17,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:00:17,322 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:00:17,322 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 04:00:17,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 04:00:17,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:00:17,324 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:00:17,325 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26517bdd67184dea6352cf50b6d9992d41ecfd853675bfc685354b90b7b5bf40 [2022-11-03 04:00:17,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:00:17,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:00:17,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:00:17,591 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:00:17,591 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:00:17,592 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound10.c [2022-11-03 04:00:17,661 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/data/06625876c/98a2801b4c054a709ccb1bd5bbf7472c/FLAG1be3d6867 [2022-11-03 04:00:18,091 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:00:18,092 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound10.c [2022-11-03 04:00:18,105 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/data/06625876c/98a2801b4c054a709ccb1bd5bbf7472c/FLAG1be3d6867 [2022-11-03 04:00:18,481 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/data/06625876c/98a2801b4c054a709ccb1bd5bbf7472c [2022-11-03 04:00:18,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:00:18,484 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:00:18,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:00:18,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:00:18,489 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:00:18,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:00:18" (1/1) ... [2022-11-03 04:00:18,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3df763d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:00:18, skipping insertion in model container [2022-11-03 04:00:18,491 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:00:18" (1/1) ... [2022-11-03 04:00:18,498 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:00:18,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:00:18,694 WARN L230 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_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound10.c[525,538] [2022-11-03 04:00:18,722 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:00:18,730 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:00:18,742 WARN L230 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_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound10.c[525,538] [2022-11-03 04:00:18,758 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:00:18,771 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:00:18,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:00:18 WrapperNode [2022-11-03 04:00:18,771 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:00:18,772 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:00:18,773 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:00:18,773 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:00:18,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:00:18" (1/1) ... [2022-11-03 04:00:18,788 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:00:18" (1/1) ... [2022-11-03 04:00:18,807 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-11-03 04:00:18,808 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:00:18,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:00:18,809 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:00:18,809 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:00:18,818 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:00:18" (1/1) ... [2022-11-03 04:00:18,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:00:18" (1/1) ... [2022-11-03 04:00:18,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:00:18" (1/1) ... [2022-11-03 04:00:18,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:00:18" (1/1) ... [2022-11-03 04:00:18,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:00:18" (1/1) ... [2022-11-03 04:00:18,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:00:18" (1/1) ... [2022-11-03 04:00:18,829 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:00:18" (1/1) ... [2022-11-03 04:00:18,837 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:00:18" (1/1) ... [2022-11-03 04:00:18,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:00:18,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:00:18,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:00:18,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:00:18,845 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:00:18" (1/1) ... [2022-11-03 04:00:18,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:00:18,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:00:18,877 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:00:18,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:00:18,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 04:00:18,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 04:00:18,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:00:18,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:00:18,924 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 04:00:18,924 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 04:00:19,000 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:00:19,002 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:00:19,181 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:00:19,268 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:00:19,268 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 04:00:19,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:00:19 BoogieIcfgContainer [2022-11-03 04:00:19,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:00:19,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:00:19,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:00:19,281 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:00:19,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:00:18" (1/3) ... [2022-11-03 04:00:19,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@96d6feb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:00:19, skipping insertion in model container [2022-11-03 04:00:19,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:00:18" (2/3) ... [2022-11-03 04:00:19,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@96d6feb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:00:19, skipping insertion in model container [2022-11-03 04:00:19,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:00:19" (3/3) ... [2022-11-03 04:00:19,284 INFO L112 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound10.c [2022-11-03 04:00:19,311 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:00:19,312 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:00:19,372 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:00:19,389 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=FINITE_AUTOMATA, 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;@3ce00741, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:00:19,404 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:00:19,409 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 04:00:19,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 04:00:19,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:19,416 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:19,417 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:19,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:19,426 INFO L85 PathProgramCache]: Analyzing trace with hash -678335095, now seen corresponding path program 1 times [2022-11-03 04:00:19,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:19,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368380474] [2022-11-03 04:00:19,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:19,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:19,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:19,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:19,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368380474] [2022-11-03 04:00:19,609 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-03 04:00:19,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929292283] [2022-11-03 04:00:19,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:19,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:19,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:00:19,616 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:00:19,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 04:00:19,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:19,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 04:00:19,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:19,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:19,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929292283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:19,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:19,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 04:00:19,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351266262] [2022-11-03 04:00:19,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:19,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 04:00:19,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:19,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 04:00:19,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 04:00:19,814 INFO L87 Difference]: Start difference. First operand has 24 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:21,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 04:00:21,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:21,897 INFO L93 Difference]: Finished difference Result 44 states and 78 transitions. [2022-11-03 04:00:21,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 04:00:21,992 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-03 04:00:21,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:21,998 INFO L225 Difference]: With dead ends: 44 [2022-11-03 04:00:21,998 INFO L226 Difference]: Without dead ends: 22 [2022-11-03 04:00:22,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 04:00:22,005 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:22,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 04:00:22,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-03 04:00:22,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-03 04:00:22,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 04:00:22,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2022-11-03 04:00:22,047 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 7 [2022-11-03 04:00:22,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:22,047 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2022-11-03 04:00:22,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:22,048 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2022-11-03 04:00:22,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 04:00:22,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:22,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:22,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:22,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:22,277 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:22,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:22,278 INFO L85 PathProgramCache]: Analyzing trace with hash 520368722, now seen corresponding path program 1 times [2022-11-03 04:00:22,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:22,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804706689] [2022-11-03 04:00:22,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:22,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:22,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:22,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:22,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804706689] [2022-11-03 04:00:22,310 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-03 04:00:22,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054279614] [2022-11-03 04:00:22,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:22,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:22,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:00:22,312 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:00:22,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 04:00:22,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:22,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:00:22,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:22,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:22,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054279614] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:22,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:22,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:00:22,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155596156] [2022-11-03 04:00:22,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:22,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:00:22,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:22,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:00:22,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:00:22,457 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:22,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:22,493 INFO L93 Difference]: Finished difference Result 42 states and 63 transitions. [2022-11-03 04:00:22,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:00:22,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 04:00:22,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:22,495 INFO L225 Difference]: With dead ends: 42 [2022-11-03 04:00:22,495 INFO L226 Difference]: Without dead ends: 24 [2022-11-03 04:00:22,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:00:22,498 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:22,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:00:22,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-03 04:00:22,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-03 04:00:22,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 04:00:22,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 35 transitions. [2022-11-03 04:00:22,514 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 35 transitions. Word has length 9 [2022-11-03 04:00:22,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:22,515 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 35 transitions. [2022-11-03 04:00:22,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:22,516 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 35 transitions. [2022-11-03 04:00:22,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 04:00:22,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:22,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:22,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:22,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:22,729 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:22,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:22,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1389535714, now seen corresponding path program 1 times [2022-11-03 04:00:22,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:22,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849716819] [2022-11-03 04:00:22,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:22,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:22,745 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 04:00:22,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2000038174] [2022-11-03 04:00:22,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:22,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:22,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:00:22,747 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:00:22,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 04:00:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:22,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:00:22,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:22,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:22,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:22,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:22,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849716819] [2022-11-03 04:00:22,855 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 04:00:22,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000038174] [2022-11-03 04:00:22,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000038174] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:22,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:22,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:00:22,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439605060] [2022-11-03 04:00:22,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:22,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:00:22,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:22,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:00:22,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:00:22,859 INFO L87 Difference]: Start difference. First operand 24 states and 35 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:22,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:22,898 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2022-11-03 04:00:22,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:00:22,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 04:00:22,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:22,900 INFO L225 Difference]: With dead ends: 37 [2022-11-03 04:00:22,900 INFO L226 Difference]: Without dead ends: 28 [2022-11-03 04:00:22,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:00:22,902 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:22,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 111 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:00:22,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-03 04:00:22,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-11-03 04:00:22,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 04:00:22,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2022-11-03 04:00:22,910 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 39 transitions. Word has length 10 [2022-11-03 04:00:22,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:22,910 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 39 transitions. [2022-11-03 04:00:22,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:22,911 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 39 transitions. [2022-11-03 04:00:22,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 04:00:22,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:22,912 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:22,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:23,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:23,137 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:23,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:23,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1388046164, now seen corresponding path program 1 times [2022-11-03 04:00:23,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:23,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820794681] [2022-11-03 04:00:23,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:23,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:23,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:23,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:23,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820794681] [2022-11-03 04:00:23,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820794681] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:23,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:23,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:00:23,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709610691] [2022-11-03 04:00:23,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:23,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:00:23,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:23,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:00:23,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:00:23,667 INFO L87 Difference]: Start difference. First operand 27 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:25,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 04:00:28,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 04:00:30,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 04:00:32,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 04:00:34,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 04:00:36,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 04:00:36,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:36,668 INFO L93 Difference]: Finished difference Result 59 states and 89 transitions. [2022-11-03 04:00:36,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:00:36,669 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 04:00:36,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:36,670 INFO L225 Difference]: With dead ends: 59 [2022-11-03 04:00:36,670 INFO L226 Difference]: Without dead ends: 39 [2022-11-03 04:00:36,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:00:36,672 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 11 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 24 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:36,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 107 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 90 Invalid, 6 Unknown, 0 Unchecked, 12.9s Time] [2022-11-03 04:00:36,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-03 04:00:36,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-03 04:00:36,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-03 04:00:36,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 56 transitions. [2022-11-03 04:00:36,688 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 56 transitions. Word has length 10 [2022-11-03 04:00:36,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:36,688 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 56 transitions. [2022-11-03 04:00:36,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:36,689 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 56 transitions. [2022-11-03 04:00:36,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 04:00:36,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:36,690 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:36,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 04:00:36,690 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:36,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:36,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1970023331, now seen corresponding path program 1 times [2022-11-03 04:00:36,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:36,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237050378] [2022-11-03 04:00:36,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:36,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:36,699 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 04:00:36,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638730843] [2022-11-03 04:00:36,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:36,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:36,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:00:36,701 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:00:36,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 04:00:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:36,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:00:36,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:36,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:36,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:00:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:36,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:36,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237050378] [2022-11-03 04:00:36,886 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 04:00:36,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638730843] [2022-11-03 04:00:36,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638730843] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:00:36,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [126307856] [2022-11-03 04:00:36,908 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 04:00:36,909 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:00:36,914 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:00:36,921 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:00:36,921 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:00:37,312 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 14 for LOIs [2022-11-03 04:00:37,320 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:00:37,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [126307856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:37,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:00:37,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 4] total 15 [2022-11-03 04:00:37,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623971237] [2022-11-03 04:00:37,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:37,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:00:37,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:37,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:00:37,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:00:37,711 INFO L87 Difference]: Start difference. First operand 39 states and 56 transitions. Second operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:40,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 04:00:40,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:40,431 INFO L93 Difference]: Finished difference Result 78 states and 117 transitions. [2022-11-03 04:00:40,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 04:00:40,433 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-03 04:00:40,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:40,435 INFO L225 Difference]: With dead ends: 78 [2022-11-03 04:00:40,436 INFO L226 Difference]: Without dead ends: 59 [2022-11-03 04:00:40,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:00:40,438 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 11 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:40,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 86 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 117 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-11-03 04:00:40,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-03 04:00:40,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2022-11-03 04:00:40,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 25 states have (on average 1.24) internal successors, (31), 28 states have internal predecessors, (31), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-03 04:00:40,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2022-11-03 04:00:40,473 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 12 [2022-11-03 04:00:40,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:40,474 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2022-11-03 04:00:40,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:40,474 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2022-11-03 04:00:40,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 04:00:40,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:40,476 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:40,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:40,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:40,692 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:40,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:40,693 INFO L85 PathProgramCache]: Analyzing trace with hash 600084205, now seen corresponding path program 1 times [2022-11-03 04:00:40,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:40,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659475538] [2022-11-03 04:00:40,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:40,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:40,702 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 04:00:40,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [275849508] [2022-11-03 04:00:40,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:40,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:40,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:00:40,704 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:00:40,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 04:00:40,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:40,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 04:00:40,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:40,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:40,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:00:40,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:40,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:40,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659475538] [2022-11-03 04:00:40,896 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 04:00:40,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275849508] [2022-11-03 04:00:40,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275849508] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:00:40,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1135295257] [2022-11-03 04:00:40,899 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 04:00:40,899 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:00:40,899 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:00:40,899 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:00:40,899 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:00:41,100 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2022-11-03 04:00:41,111 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:00:41,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1135295257] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:41,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:00:41,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5, 5] total 17 [2022-11-03 04:00:41,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166913216] [2022-11-03 04:00:41,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:41,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:00:41,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:41,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:00:41,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:00:41,554 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:45,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 04:00:45,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:45,977 INFO L93 Difference]: Finished difference Result 68 states and 96 transitions. [2022-11-03 04:00:45,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 04:00:45,978 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 04:00:45,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:45,979 INFO L225 Difference]: With dead ends: 68 [2022-11-03 04:00:45,979 INFO L226 Difference]: Without dead ends: 65 [2022-11-03 04:00:45,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:00:45,980 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:45,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 121 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 212 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2022-11-03 04:00:45,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-03 04:00:45,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 49. [2022-11-03 04:00:45,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 30 states have internal predecessors, (34), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-03 04:00:45,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2022-11-03 04:00:45,997 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 13 [2022-11-03 04:00:45,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:45,997 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2022-11-03 04:00:45,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:45,998 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2022-11-03 04:00:45,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 04:00:45,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:45,999 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:46,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:46,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:46,212 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:46,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:46,213 INFO L85 PathProgramCache]: Analyzing trace with hash 601573755, now seen corresponding path program 1 times [2022-11-03 04:00:46,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:46,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652236154] [2022-11-03 04:00:46,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:46,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:46,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:46,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:46,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652236154] [2022-11-03 04:00:46,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652236154] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:00:46,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563985925] [2022-11-03 04:00:46,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:46,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:46,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:00:46,568 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:00:46,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 04:00:46,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:46,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:00:46,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:46,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:46,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:00:47,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:47,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563985925] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:00:47,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1232586442] [2022-11-03 04:00:47,069 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 04:00:47,069 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:00:47,070 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:00:47,070 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:00:47,070 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:00:47,265 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2022-11-03 04:00:47,314 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:00:48,056 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1216#(and (<= 2 ~counter~0) (< ~counter~0 11) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 04:00:48,056 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:00:48,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:00:48,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-11-03 04:00:48,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621888374] [2022-11-03 04:00:48,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:00:48,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 04:00:48,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:48,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 04:00:48,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-11-03 04:00:48,059 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:54,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 04:00:58,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 04:01:00,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 04:01:02,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 04:01:04,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 04:01:06,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 04:01:08,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 04:01:10,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 04:01:13,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 04:01:16,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:16,242 INFO L93 Difference]: Finished difference Result 104 states and 155 transitions. [2022-11-03 04:01:16,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 04:01:16,243 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 04:01:16,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:16,244 INFO L225 Difference]: With dead ends: 104 [2022-11-03 04:01:16,244 INFO L226 Difference]: Without dead ends: 77 [2022-11-03 04:01:16,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-11-03 04:01:16,246 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 53 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 106 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:16,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 263 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 359 Invalid, 9 Unknown, 0 Unchecked, 28.0s Time] [2022-11-03 04:01:16,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-03 04:01:16,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2022-11-03 04:01:16,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 37 states have internal predecessors, (42), 29 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-03 04:01:16,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 98 transitions. [2022-11-03 04:01:16,269 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 98 transitions. Word has length 13 [2022-11-03 04:01:16,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:16,269 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 98 transitions. [2022-11-03 04:01:16,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:16,269 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 98 transitions. [2022-11-03 04:01:16,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 04:01:16,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:16,271 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:16,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:16,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:16,489 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:16,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:16,490 INFO L85 PathProgramCache]: Analyzing trace with hash -339513844, now seen corresponding path program 1 times [2022-11-03 04:01:16,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:16,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565503115] [2022-11-03 04:01:16,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:16,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:16,500 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 04:01:16,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727001616] [2022-11-03 04:01:16,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:16,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:16,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:16,502 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:16,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 04:01:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:16,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 04:01:16,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:16,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 04:01:16,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:16,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:16,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565503115] [2022-11-03 04:01:16,669 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 04:01:16,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727001616] [2022-11-03 04:01:16,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727001616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:16,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:16,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:01:16,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947272409] [2022-11-03 04:01:16,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:16,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:16,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:16,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:16,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:01:16,671 INFO L87 Difference]: Start difference. First operand 67 states and 98 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 04:01:18,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 04:01:19,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:19,640 INFO L93 Difference]: Finished difference Result 81 states and 109 transitions. [2022-11-03 04:01:19,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:01:19,641 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-11-03 04:01:19,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:19,643 INFO L225 Difference]: With dead ends: 81 [2022-11-03 04:01:19,643 INFO L226 Difference]: Without dead ends: 61 [2022-11-03 04:01:19,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:01:19,644 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:19,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 101 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-11-03 04:01:19,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-03 04:01:19,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-11-03 04:01:19,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 36 states have internal predecessors, (40), 22 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-03 04:01:19,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 83 transitions. [2022-11-03 04:01:19,658 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 83 transitions. Word has length 20 [2022-11-03 04:01:19,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:19,658 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 83 transitions. [2022-11-03 04:01:19,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 04:01:19,659 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 83 transitions. [2022-11-03 04:01:19,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 04:01:19,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:19,660 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:19,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:19,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:19,865 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:19,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:19,865 INFO L85 PathProgramCache]: Analyzing trace with hash -787687870, now seen corresponding path program 1 times [2022-11-03 04:01:19,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:19,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996969815] [2022-11-03 04:01:19,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:19,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:19,882 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 04:01:19,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174300738] [2022-11-03 04:01:19,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:19,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:19,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:19,886 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:19,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 04:01:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:19,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:01:19,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:20,110 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 04:01:20,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 04:01:20,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:20,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996969815] [2022-11-03 04:01:20,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 04:01:20,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174300738] [2022-11-03 04:01:20,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174300738] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:20,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1094976335] [2022-11-03 04:01:20,249 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-03 04:01:20,249 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:01:20,250 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:01:20,250 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:01:20,250 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:02:07,121 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2022-11-03 04:02:07,128 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:02:46,079 WARN L234 SmtUtils]: Spent 24.92s on a formula simplification. DAG size of input: 53 DAG size of output: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:02:48,089 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (<= c_~counter~0 11)) (.cse1 (<= |c_ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1)) (.cse2 (<= 0 |c_ULTIMATE.start_assume_abort_if_not_~cond#1|)) (.cse3 (<= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (.cse4 (<= 0 |c_ULTIMATE.start_assume_abort_if_not_#in~cond#1|)) (.cse5 (<= 0 |c_#StackHeapBarrier|)) (.cse11 (<= 2 c_~counter~0))) (and .cse0 .cse1 .cse2 (<= 0 |c_#NULL.base|) .cse3 .cse4 (<= 0 |c_#NULL.offset|) .cse5 (let ((.cse6 (= |c_#NULL.offset| 0)) (.cse7 (not (= (ite (< (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296) (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| 2) |c_ULTIMATE.start_main_~q~0#1|) 4294967296)) 1 0) 0))) (.cse8 (= |c_#NULL.base| 0)) (.cse9 (not (= (ite (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) (mod (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~q~0#1|) 4294967296)) 1 0) 0))) (.cse10 (not (= (ite (= (mod (let ((.cse12 (* |c_ULTIMATE.start_main_~h~0#1| 12))) (+ (* (* (* |c_ULTIMATE.start_main_~n~0#1| .cse12) |c_ULTIMATE.start_main_~q~0#1|) 4294967295) (* |c_ULTIMATE.start_main_~h~0#1| (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|)) (* (* (* (* |c_ULTIMATE.start_main_~p~0#1| 16) |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967295) (* 4294967295 (* (* (* |c_ULTIMATE.start_main_~p~0#1| 4) |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~q~0#1|)) (* (* (* |c_ULTIMATE.start_main_~n~0#1| 16) |c_ULTIMATE.start_main_~p~0#1|) |c_ULTIMATE.start_main_~q~0#1|) (* (* .cse12 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) (* 4294967295 (* (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~q~0#1|)))) 4294967296) 0) 1 0) 0)))) (or (and .cse0 .cse1 .cse2 (= |c_ULTIMATE.start_main_~p~0#1| 0) .cse6 .cse7 .cse8 .cse3 .cse9 (= |c_ULTIMATE.start_main_~h~0#1| 0) .cse4 .cse5 .cse10 .cse11) (and .cse0 .cse1 .cse2 .cse6 .cse7 .cse8 .cse3 .cse9 .cse4 .cse5 .cse10 .cse11))) (<= |c_#NULL.base| 0) (<= |c_#NULL.offset| 0) .cse11)) is different from false [2022-11-03 04:02:50,098 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (<= c_~counter~0 11)) (.cse1 (<= |c_ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1)) (.cse2 (<= 0 |c_ULTIMATE.start_assume_abort_if_not_~cond#1|)) (.cse7 (<= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (.cse9 (<= 0 |c_ULTIMATE.start_assume_abort_if_not_#in~cond#1|)) (.cse10 (<= 0 |c_#StackHeapBarrier|)) (.cse12 (<= 2 c_~counter~0))) (and .cse0 (let ((.cse15 (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse14 (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|))) (let ((.cse3 (= |c_#NULL.offset| 0)) (.cse4 (not (= (ite (< (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296) (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| 2) |c_ULTIMATE.start_main_~q~0#1|) 4294967296)) 1 0) 0))) (.cse5 (= |c_#NULL.base| 0)) (.cse6 (not (= (ite (= (mod (let ((.cse16 (* |c_ULTIMATE.start_main_~h~0#1| 4))) (+ (* |c_ULTIMATE.start_main_~n~0#1| .cse14) (* 4294967295 (* .cse15 |c_ULTIMATE.start_main_~q~0#1|)) (* (* |c_ULTIMATE.start_main_~p~0#1| .cse16) |c_ULTIMATE.start_main_~r~0#1|) (* (* |c_ULTIMATE.start_main_~r~0#1| (* 4 |c_ULTIMATE.start_main_~q~0#1|)) |c_ULTIMATE.start_main_~r~0#1|) (* (* |c_ULTIMATE.start_main_~r~0#1| .cse14) 4294967295) (* 4294967295 (* |c_ULTIMATE.start_main_~r~0#1| (* (* |c_ULTIMATE.start_main_~n~0#1| 8) |c_ULTIMATE.start_main_~q~0#1|))) (* |c_ULTIMATE.start_main_~r~0#1| (* |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (* (* (* |c_ULTIMATE.start_main_~n~0#1| .cse16) |c_ULTIMATE.start_main_~p~0#1|) 4294967295) (* (* (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1|) 4) |c_ULTIMATE.start_main_~q~0#1|))) 4294967296) 0) 1 0) 0))) (.cse8 (not (= (ite (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) (mod .cse15 4294967296)) 1 0) 0))) (.cse11 (not (= (ite (= (mod (let ((.cse13 (* |c_ULTIMATE.start_main_~h~0#1| 12))) (+ (* (* (* |c_ULTIMATE.start_main_~n~0#1| .cse13) |c_ULTIMATE.start_main_~q~0#1|) 4294967295) (* |c_ULTIMATE.start_main_~h~0#1| .cse14) (* (* (* (* |c_ULTIMATE.start_main_~p~0#1| 16) |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967295) (* 4294967295 (* (* (* |c_ULTIMATE.start_main_~p~0#1| 4) |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~q~0#1|)) (* (* (* |c_ULTIMATE.start_main_~n~0#1| 16) |c_ULTIMATE.start_main_~p~0#1|) |c_ULTIMATE.start_main_~q~0#1|) (* (* .cse13 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) (* 4294967295 (* (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~q~0#1|)))) 4294967296) 0) 1 0) 0)))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12) (and .cse0 .cse1 .cse2 (= |c_ULTIMATE.start_main_~p~0#1| 0) .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 (= |c_ULTIMATE.start_main_~h~0#1| 0) .cse9 .cse10 .cse11 .cse12)))) .cse1 .cse2 (<= 0 |c_#NULL.base|) .cse7 .cse9 (<= 0 |c_#NULL.offset|) .cse10 (<= |c_#NULL.base| 0) (<= |c_#NULL.offset| 0) .cse12)) is different from false [2022-11-03 04:04:51,171 WARN L234 SmtUtils]: Spent 1.43m on a formula simplification. DAG size of input: 134 DAG size of output: 126 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:04:53,180 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (<= c_~counter~0 11)) (.cse2 (<= |c_ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1)) (.cse3 (<= 0 |c_ULTIMATE.start_assume_abort_if_not_~cond#1|)) (.cse8 (<= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (.cse11 (<= 0 |c_ULTIMATE.start_assume_abort_if_not_#in~cond#1|)) (.cse12 (<= 0 |c_#StackHeapBarrier|)) (.cse14 (<= 2 c_~counter~0))) (and .cse0 (let ((.cse19 (* |c_ULTIMATE.start_main_~h~0#1| 4))) (let ((.cse17 (* (* |c_ULTIMATE.start_main_~p~0#1| 4) |c_ULTIMATE.start_main_~q~0#1|)) (.cse16 (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|)) (.cse18 (* |c_ULTIMATE.start_main_~n~0#1| .cse19)) (.cse20 (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse22 (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse21 (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (let ((.cse1 (not (= (ite (= (mod (+ .cse20 (* .cse22 4294967295) .cse21) 4294967296) 0) 1 0) 0))) (.cse4 (= |c_#NULL.offset| 0)) (.cse5 (not (= (ite (< (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296) (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| 2) |c_ULTIMATE.start_main_~q~0#1|) 4294967296)) 1 0) 0))) (.cse6 (= |c_#NULL.base| 0)) (.cse7 (not (= (ite (= (mod (+ (* |c_ULTIMATE.start_main_~n~0#1| .cse16) (* 4294967295 (* .cse22 |c_ULTIMATE.start_main_~q~0#1|)) (* (* |c_ULTIMATE.start_main_~p~0#1| .cse19) |c_ULTIMATE.start_main_~r~0#1|) (* (* |c_ULTIMATE.start_main_~r~0#1| (* 4 |c_ULTIMATE.start_main_~q~0#1|)) |c_ULTIMATE.start_main_~r~0#1|) (* (* |c_ULTIMATE.start_main_~r~0#1| .cse16) 4294967295) (* 4294967295 (* |c_ULTIMATE.start_main_~r~0#1| (* (* |c_ULTIMATE.start_main_~n~0#1| 8) |c_ULTIMATE.start_main_~q~0#1|))) (* |c_ULTIMATE.start_main_~r~0#1| (* |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (* (* .cse18 |c_ULTIMATE.start_main_~p~0#1|) 4294967295) (* (* (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1|) 4) |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) 0) 1 0) 0))) (.cse9 (not (= (ite (= (mod (+ .cse20 .cse21) 4294967296) (mod .cse22 4294967296)) 1 0) 0))) (.cse10 (not (= (ite (= (mod (+ (* 4294967295 (* |c_ULTIMATE.start_main_~r~0#1| .cse17)) (* (* |c_ULTIMATE.start_main_~p~0#1| (* |c_ULTIMATE.start_main_~n~0#1| 4)) |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| .cse16) (* (* .cse18 |c_ULTIMATE.start_main_~q~0#1|) 4294967295) (* 4294967295 (* (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~q~0#1|)) (* (* .cse19 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|)) 4294967296) 0) 1 0) 0))) (.cse13 (not (= (ite (= (mod (let ((.cse15 (* |c_ULTIMATE.start_main_~h~0#1| 12))) (+ (* (* (* |c_ULTIMATE.start_main_~n~0#1| .cse15) |c_ULTIMATE.start_main_~q~0#1|) 4294967295) (* |c_ULTIMATE.start_main_~h~0#1| .cse16) (* (* (* (* |c_ULTIMATE.start_main_~p~0#1| 16) |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967295) (* 4294967295 (* .cse17 |c_ULTIMATE.start_main_~q~0#1|)) (* (* (* |c_ULTIMATE.start_main_~n~0#1| 16) |c_ULTIMATE.start_main_~p~0#1|) |c_ULTIMATE.start_main_~q~0#1|) (* (* .cse15 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) (* 4294967295 (* (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~q~0#1|)))) 4294967296) 0) 1 0) 0)))) (or (and .cse0 .cse1 .cse2 .cse3 (= |c_ULTIMATE.start_main_~p~0#1| 0) .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 (= |c_ULTIMATE.start_main_~h~0#1| 0) .cse10 .cse11 .cse12 .cse13 .cse14) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 .cse13 .cse14))))) .cse2 .cse3 (<= 0 |c_#NULL.base|) .cse8 .cse11 (<= 0 |c_#NULL.offset|) .cse12 (<= |c_#NULL.base| 0) (<= |c_#NULL.offset| 0) .cse14)) is different from false [2022-11-03 04:04:53,233 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2074#(and (<= 2 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= ~counter~0 12) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 04:04:53,233 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:04:53,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:04:53,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2022-11-03 04:04:53,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962375066] [2022-11-03 04:04:53,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 04:04:53,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 04:04:53,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:04:53,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 04:04:53,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=530, Unknown=19, NotChecked=150, Total=812 [2022-11-03 04:04:53,236 INFO L87 Difference]: Start difference. First operand 61 states and 83 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 04:05:03,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 04:05:05,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 04:05:07,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 04:05:10,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 04:05:11,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 04:05:14,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 04:05:17,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 04:05:19,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 04:05:21,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 04:05:23,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 04:05:28,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 04:05:28,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:28,536 INFO L93 Difference]: Finished difference Result 255 states and 327 transitions. [2022-11-03 04:05:28,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 04:05:28,537 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 46 [2022-11-03 04:05:28,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:28,540 INFO L225 Difference]: With dead ends: 255 [2022-11-03 04:05:28,540 INFO L226 Difference]: Without dead ends: 246 [2022-11-03 04:05:28,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 172.4s TimeCoverageRelationStatistics Valid=155, Invalid=765, Unknown=22, NotChecked=180, Total=1122 [2022-11-03 04:05:28,541 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 138 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 74 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:28,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 304 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 166 Invalid, 9 Unknown, 0 Unchecked, 29.1s Time] [2022-11-03 04:05:28,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-11-03 04:05:28,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 232. [2022-11-03 04:05:28,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 132 states have internal predecessors, (144), 81 states have call successors, (81), 23 states have call predecessors, (81), 23 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2022-11-03 04:05:28,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 301 transitions. [2022-11-03 04:05:28,603 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 301 transitions. Word has length 46 [2022-11-03 04:05:28,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:28,606 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 301 transitions. [2022-11-03 04:05:28,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 04:05:28,606 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 301 transitions. [2022-11-03 04:05:28,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 04:05:28,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:28,614 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:05:28,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 04:05:28,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-03 04:05:28,815 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:28,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:28,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1687602719, now seen corresponding path program 1 times [2022-11-03 04:05:28,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:05:28,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012578663] [2022-11-03 04:05:28,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:28,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:05:28,826 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 04:05:28,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587737854] [2022-11-03 04:05:28,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:28,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:05:28,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:05:28,828 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:05:28,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcfa17fc-c5a0-468d-bfcf-c48cffdf3886/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process