./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW --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 d629f4eefc4b49512b7b1b628f28a13dcdca90b36cb521919e0cc9ad875c2764 --- 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-4e7fbc6 [2022-11-23 14:32:14,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:32:14,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:32:14,106 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:32:14,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:32:14,110 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:32:14,113 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:32:14,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:32:14,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:32:14,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:32:14,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:32:14,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:32:14,128 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:32:14,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:32:14,133 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:32:14,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:32:14,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:32:14,138 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:32:14,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:32:14,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:32:14,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:32:14,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:32:14,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:32:14,155 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:32:14,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:32:14,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:32:14,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:32:14,167 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:32:14,168 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:32:14,169 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:32:14,170 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:32:14,171 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:32:14,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:32:14,176 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:32:14,177 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:32:14,177 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:32:14,178 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:32:14,178 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:32:14,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:32:14,180 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:32:14,181 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:32:14,182 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:32:14,228 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:32:14,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:32:14,229 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:32:14,229 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:32:14,230 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:32:14,230 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:32:14,230 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:32:14,231 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:32:14,231 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:32:14,231 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:32:14,232 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:32:14,232 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:32:14,232 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:32:14,232 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:32:14,233 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:32:14,233 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:32:14,233 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:32:14,233 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:32:14,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:32:14,235 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:32:14,235 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:32:14,235 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:32:14,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:32:14,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:32:14,236 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:32:14,237 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:32:14,237 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:32:14,237 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:32:14,237 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:32:14,238 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:32:14,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:32:14,238 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:32:14,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:32:14,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:32:14,239 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:32:14,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:32:14,240 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:32:14,240 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:32:14,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:32:14,240 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:32:14,240 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:32:14,241 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_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d629f4eefc4b49512b7b1b628f28a13dcdca90b36cb521919e0cc9ad875c2764 [2022-11-23 14:32:14,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:32:14,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:32:14,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:32:14,555 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:32:14,555 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:32:14,557 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound5.c [2022-11-23 14:32:17,680 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:32:17,939 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:32:17,940 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound5.c [2022-11-23 14:32:17,948 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/data/0e1919a25/7ddf5a7edfaf43b99ae61cdc515b42f1/FLAG6214a5bdd [2022-11-23 14:32:17,967 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/data/0e1919a25/7ddf5a7edfaf43b99ae61cdc515b42f1 [2022-11-23 14:32:17,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:32:17,975 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:32:17,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:32:17,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:32:17,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:32:17,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:32:17" (1/1) ... [2022-11-23 14:32:17,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f6b390a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:17, skipping insertion in model container [2022-11-23 14:32:17,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:32:17" (1/1) ... [2022-11-23 14:32:17,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:32:18,018 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:32:18,180 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound5.c[458,471] [2022-11-23 14:32:18,197 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:32:18,205 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:32:18,217 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound5.c[458,471] [2022-11-23 14:32:18,223 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:32:18,235 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:32:18,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:18 WrapperNode [2022-11-23 14:32:18,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:32:18,237 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:32:18,237 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:32:18,237 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:32:18,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:18" (1/1) ... [2022-11-23 14:32:18,253 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:18" (1/1) ... [2022-11-23 14:32:18,276 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 39 [2022-11-23 14:32:18,277 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:32:18,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:32:18,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:32:18,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:32:18,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:18" (1/1) ... [2022-11-23 14:32:18,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:18" (1/1) ... [2022-11-23 14:32:18,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:18" (1/1) ... [2022-11-23 14:32:18,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:18" (1/1) ... [2022-11-23 14:32:18,305 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:18" (1/1) ... [2022-11-23 14:32:18,315 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:18" (1/1) ... [2022-11-23 14:32:18,316 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:18" (1/1) ... [2022-11-23 14:32:18,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:18" (1/1) ... [2022-11-23 14:32:18,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:32:18,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:32:18,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:32:18,320 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:32:18,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:18" (1/1) ... [2022-11-23 14:32:18,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:32:18,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:32:18,354 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:32:18,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:32:18,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:32:18,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:32:18,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:32:18,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:32:18,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 14:32:18,393 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 14:32:18,455 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:32:18,456 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:32:18,582 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:32:18,599 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:32:18,599 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 14:32:18,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:32:18 BoogieIcfgContainer [2022-11-23 14:32:18,602 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:32:18,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:32:18,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:32:18,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:32:18,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:32:17" (1/3) ... [2022-11-23 14:32:18,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47984254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:32:18, skipping insertion in model container [2022-11-23 14:32:18,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:18" (2/3) ... [2022-11-23 14:32:18,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47984254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:32:18, skipping insertion in model container [2022-11-23 14:32:18,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:32:18" (3/3) ... [2022-11-23 14:32:18,612 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound5.c [2022-11-23 14:32:18,633 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:32:18,633 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:32:18,694 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:32:18,702 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;@55633565, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:32:18,702 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:32:18,707 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:32:18,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 14:32:18,715 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:32:18,716 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 14:32:18,716 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:32:18,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:32:18,722 INFO L85 PathProgramCache]: Analyzing trace with hash -2099432067, now seen corresponding path program 1 times [2022-11-23 14:32:18,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:32:18,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238235895] [2022-11-23 14:32:18,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:18,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:32:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:18,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:32:18,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238235895] [2022-11-23 14:32:18,855 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-23 14:32:18,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804489346] [2022-11-23 14:32:18,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:18,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:18,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:32:18,864 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:32:18,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:32:18,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:18,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-23 14:32:18,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:32:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:32:18,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:32:18,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804489346] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:32:18,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:32:18,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:32:18,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330392338] [2022-11-23 14:32:18,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:32:18,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 14:32:18,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:32:19,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 14:32:19,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:32:19,023 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-11-23 14:32:19,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:32:19,049 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2022-11-23 14:32:19,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 14:32:19,052 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 6 [2022-11-23 14:32:19,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:32:19,060 INFO L225 Difference]: With dead ends: 29 [2022-11-23 14:32:19,060 INFO L226 Difference]: Without dead ends: 13 [2022-11-23 14:32:19,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:32:19,071 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:32:19,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:32:19,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-23 14:32:19,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-23 14:32:19,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:32:19,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-11-23 14:32:19,119 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 6 [2022-11-23 14:32:19,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:32:19,119 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-11-23 14:32:19,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-11-23 14:32:19,120 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-11-23 14:32:19,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:32:19,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:32:19,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:32:19,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:32:19,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-23 14:32:19,330 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:32:19,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:32:19,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1058308380, now seen corresponding path program 1 times [2022-11-23 14:32:19,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:32:19,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742490085] [2022-11-23 14:32:19,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:19,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:32:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:19,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:32:19,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742490085] [2022-11-23 14:32:19,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-23 14:32:19,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614622149] [2022-11-23 14:32:19,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:19,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:19,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:32:19,363 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:32:19,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:32:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:19,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:32:19,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:32:19,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:32:19,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:32:19,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614622149] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:32:19,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:32:19,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:32:19,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626523415] [2022-11-23 14:32:19,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:32:19,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:32:19,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:32:19,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:32:19,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:32:19,514 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 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) [2022-11-23 14:32:19,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:32:19,550 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2022-11-23 14:32:19,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:32:19,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 [2022-11-23 14:32:19,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:32:19,553 INFO L225 Difference]: With dead ends: 23 [2022-11-23 14:32:19,554 INFO L226 Difference]: Without dead ends: 15 [2022-11-23 14:32:19,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:32:19,556 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:32:19,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:32:19,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-23 14:32:19,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-23 14:32:19,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:32:19,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-11-23 14:32:19,570 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 7 [2022-11-23 14:32:19,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:32:19,571 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-11-23 14:32:19,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-23 14:32:19,572 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-11-23 14:32:19,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:32:19,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:32:19,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:32:19,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:32:19,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:19,784 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:32:19,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:32:19,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1056520920, now seen corresponding path program 1 times [2022-11-23 14:32:19,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:32:19,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484935535] [2022-11-23 14:32:19,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:19,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:32:19,799 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:32:19,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [723322808] [2022-11-23 14:32:19,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:19,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:19,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:32:19,801 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:32:19,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:32:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:19,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 14:32:19,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:32:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:32:19,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:32:19,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:32:19,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484935535] [2022-11-23 14:32:19,948 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:32:19,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723322808] [2022-11-23 14:32:19,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723322808] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:32:19,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:32:19,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:32:19,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139395720] [2022-11-23 14:32:19,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:32:19,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:32:19,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:32:19,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:32:19,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:32:19,951 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 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) [2022-11-23 14:32:20,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:32:20,018 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2022-11-23 14:32:20,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:32:20,019 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 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 [2022-11-23 14:32:20,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:32:20,020 INFO L225 Difference]: With dead ends: 25 [2022-11-23 14:32:20,020 INFO L226 Difference]: Without dead ends: 21 [2022-11-23 14:32:20,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:32:20,022 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:32:20,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 41 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:32:20,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-23 14:32:20,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-23 14:32:20,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:32:20,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-23 14:32:20,030 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 7 [2022-11-23 14:32:20,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:32:20,031 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-23 14:32:20,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 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) [2022-11-23 14:32:20,032 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-23 14:32:20,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 14:32:20,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:32:20,033 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:32:20,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:32:20,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:20,238 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:32:20,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:32:20,239 INFO L85 PathProgramCache]: Analyzing trace with hash -640052534, now seen corresponding path program 1 times [2022-11-23 14:32:20,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:32:20,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525085830] [2022-11-23 14:32:20,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:20,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:32:20,257 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:32:20,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1176477095] [2022-11-23 14:32:20,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:20,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:20,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:32:20,262 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:32:20,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:32:20,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:20,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 14:32:20,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:32:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:32:20,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:32:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:32:20,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:32:20,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525085830] [2022-11-23 14:32:20,448 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:32:20,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176477095] [2022-11-23 14:32:20,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176477095] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:32:20,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2038875328] [2022-11-23 14:32:20,469 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-23 14:32:20,469 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:32:20,474 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:32:20,480 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:32:20,480 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:32:21,409 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 51 for LOIs [2022-11-23 14:32:21,503 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:32:22,273 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '350#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-23 14:32:22,273 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:32:22,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:32:22,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-23 14:32:22,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735983503] [2022-11-23 14:32:22,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:32:22,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:32:22,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:32:22,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:32:22,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-11-23 14:32:22,275 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:32:22,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:32:22,390 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2022-11-23 14:32:22,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 14:32:22,391 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2022-11-23 14:32:22,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:32:22,392 INFO L225 Difference]: With dead ends: 55 [2022-11-23 14:32:22,392 INFO L226 Difference]: Without dead ends: 47 [2022-11-23 14:32:22,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-11-23 14:32:22,394 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 37 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:32:22,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 86 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:32:22,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-23 14:32:22,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2022-11-23 14:32:22,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 14:32:22,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2022-11-23 14:32:22,404 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 15 [2022-11-23 14:32:22,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:32:22,405 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2022-11-23 14:32:22,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:32:22,405 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2022-11-23 14:32:22,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 14:32:22,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:32:22,406 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:32:22,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:32:22,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:22,616 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:32:22,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:32:22,616 INFO L85 PathProgramCache]: Analyzing trace with hash -638265074, now seen corresponding path program 1 times [2022-11-23 14:32:22,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:32:22,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453660697] [2022-11-23 14:32:22,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:22,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:32:22,632 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:32:22,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966122022] [2022-11-23 14:32:22,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:22,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:22,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:32:22,636 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:32:22,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:32:22,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:22,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 14:32:22,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:32:22,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:32:22,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:32:23,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:32:23,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:32:23,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453660697] [2022-11-23 14:32:23,138 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:32:23,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966122022] [2022-11-23 14:32:23,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966122022] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:32:23,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [200023666] [2022-11-23 14:32:23,143 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 14:32:23,143 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:32:23,144 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:32:23,145 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:32:23,146 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:32:23,680 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2022-11-23 14:32:23,713 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:32:24,263 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '598#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:32:24,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:32:24,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:32:24,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2022-11-23 14:32:24,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352914680] [2022-11-23 14:32:24,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:32:24,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 14:32:24,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:32:24,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 14:32:24,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-11-23 14:32:24,266 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:32:24,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:32:24,424 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2022-11-23 14:32:24,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:32:24,428 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2022-11-23 14:32:24,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:32:24,429 INFO L225 Difference]: With dead ends: 57 [2022-11-23 14:32:24,429 INFO L226 Difference]: Without dead ends: 46 [2022-11-23 14:32:24,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-11-23 14:32:24,430 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:32:24,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 42 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:32:24,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-23 14:32:24,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2022-11-23 14:32:24,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 14:32:24,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-11-23 14:32:24,449 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 15 [2022-11-23 14:32:24,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:32:24,450 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-11-23 14:32:24,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:32:24,450 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-11-23 14:32:24,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-23 14:32:24,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:32:24,451 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-23 14:32:24,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:32:24,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:24,652 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:32:24,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:32:24,652 INFO L85 PathProgramCache]: Analyzing trace with hash -186597301, now seen corresponding path program 1 times [2022-11-23 14:32:24,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:32:24,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983562567] [2022-11-23 14:32:24,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:24,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:32:24,661 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:32:24,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2054374747] [2022-11-23 14:32:24,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:24,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:24,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:32:24,663 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:32:24,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:32:24,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:24,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 14:32:24,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:32:24,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:32:24,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:32:28,964 WARN L837 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-23 14:32:45,644 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_22| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_22|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 3)) 4) 0)))) is different from true [2022-11-23 14:33:03,745 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_22| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_22|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 3)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-23 14:33:11,836 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-23 14:33:13,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:33:13,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983562567] [2022-11-23 14:33:13,870 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:33:13,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054374747] [2022-11-23 14:33:13,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054374747] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:33:13,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2124222895] [2022-11-23 14:33:13,872 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-23 14:33:13,873 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:33:13,873 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:33:13,873 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:33:13,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:33:14,286 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-11-23 14:33:14,371 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:33:15,423 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '862#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:33:15,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:33:15,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:33:15,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-11-23 14:33:15,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140977868] [2022-11-23 14:33:15,424 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 14:33:15,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 14:33:15,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:33:15,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 14:33:15,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=361, Unknown=4, NotChecked=164, Total=600 [2022-11-23 14:33:15,425 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:33:15,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:33:15,581 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2022-11-23 14:33:15,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:33:15,584 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-11-23 14:33:15,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:33:15,585 INFO L225 Difference]: With dead ends: 45 [2022-11-23 14:33:15,585 INFO L226 Difference]: Without dead ends: 40 [2022-11-23 14:33:15,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=92, Invalid=472, Unknown=4, NotChecked=188, Total=756 [2022-11-23 14:33:15,586 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:33:15,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 50 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:33:15,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-23 14:33:15,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-11-23 14:33:15,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 14:33:15,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-11-23 14:33:15,604 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 21 [2022-11-23 14:33:15,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:33:15,604 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-11-23 14:33:15,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:33:15,604 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-11-23 14:33:15,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 14:33:15,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:33:15,606 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2022-11-23 14:33:15,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-23 14:33:15,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 14:33:15,811 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:33:15,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:33:15,812 INFO L85 PathProgramCache]: Analyzing trace with hash -648869455, now seen corresponding path program 2 times [2022-11-23 14:33:15,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:33:15,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731601428] [2022-11-23 14:33:15,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:15,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:33:15,827 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:33:15,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478641307] [2022-11-23 14:33:15,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:33:15,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:15,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:33:15,834 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:33:15,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:33:15,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 14:33:15,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:33:15,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 14:33:15,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:33:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 14:33:16,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:33:20,304 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-23 14:33:20,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:33:20,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731601428] [2022-11-23 14:33:20,308 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:33:20,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478641307] [2022-11-23 14:33:20,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478641307] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:33:20,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [996522840] [2022-11-23 14:33:20,310 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-23 14:33:20,311 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:33:20,311 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:33:20,311 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:33:20,311 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:33:20,760 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-11-23 14:33:20,845 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:33:21,911 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1135#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:33:21,911 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:33:21,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:33:21,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-11-23 14:33:21,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864999306] [2022-11-23 14:33:21,912 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 14:33:21,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 14:33:21,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:33:21,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 14:33:21,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=438, Unknown=1, NotChecked=42, Total=552 [2022-11-23 14:33:21,914 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:33:22,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:33:22,135 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2022-11-23 14:33:22,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 14:33:22,135 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2022-11-23 14:33:22,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:33:22,136 INFO L225 Difference]: With dead ends: 45 [2022-11-23 14:33:22,136 INFO L226 Difference]: Without dead ends: 40 [2022-11-23 14:33:22,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=92, Invalid=561, Unknown=1, NotChecked=48, Total=702 [2022-11-23 14:33:22,138 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:33:22,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 81 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:33:22,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-23 14:33:22,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-11-23 14:33:22,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 14:33:22,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-11-23 14:33:22,148 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 29 [2022-11-23 14:33:22,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:33:22,149 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-11-23 14:33:22,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:33:22,149 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-11-23 14:33:22,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-23 14:33:22,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:33:22,150 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1] [2022-11-23 14:33:22,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:33:22,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 14:33:22,357 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:33:22,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:33:22,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1028616937, now seen corresponding path program 3 times [2022-11-23 14:33:22,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:33:22,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591318564] [2022-11-23 14:33:22,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:22,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:33:22,366 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:33:22,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1856823442] [2022-11-23 14:33:22,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:33:22,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:22,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:33:22,368 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:33:22,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:33:22,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:33:22,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:33:22,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 14:33:22,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:33:22,639 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 14:33:22,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:33:26,858 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-23 14:33:26,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:33:26,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591318564] [2022-11-23 14:33:26,862 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:33:26,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856823442] [2022-11-23 14:33:26,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856823442] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:33:26,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2103322084] [2022-11-23 14:33:26,864 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-23 14:33:26,864 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:33:26,865 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:33:26,865 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:33:26,865 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:33:27,267 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-11-23 14:33:27,352 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:33:32,927 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1433#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:33:32,928 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:33:32,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:33:32,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-11-23 14:33:32,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177994808] [2022-11-23 14:33:32,930 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 14:33:32,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 14:33:32,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:33:32,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 14:33:32,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=480, Unknown=2, NotChecked=44, Total=600 [2022-11-23 14:33:32,932 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 14:33:33,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:33:33,163 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2022-11-23 14:33:33,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 14:33:33,164 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 37 [2022-11-23 14:33:33,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:33:33,164 INFO L225 Difference]: With dead ends: 47 [2022-11-23 14:33:33,164 INFO L226 Difference]: Without dead ends: 42 [2022-11-23 14:33:33,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=95, Invalid=609, Unknown=2, NotChecked=50, Total=756 [2022-11-23 14:33:33,166 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:33:33,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 100 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:33:33,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-23 14:33:33,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-11-23 14:33:33,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 14:33:33,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2022-11-23 14:33:33,175 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2022-11-23 14:33:33,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:33:33,175 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2022-11-23 14:33:33,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 14:33:33,176 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2022-11-23 14:33:33,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-23 14:33:33,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:33:33,177 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-23 14:33:33,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-23 14:33:33,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:33,383 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:33:33,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:33:33,383 INFO L85 PathProgramCache]: Analyzing trace with hash 126888572, now seen corresponding path program 2 times [2022-11-23 14:33:33,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:33:33,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096173203] [2022-11-23 14:33:33,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:33,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:33:33,391 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:33:33,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966386304] [2022-11-23 14:33:33,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:33:33,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:33,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:33:33,393 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:33:33,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:33:33,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-23 14:33:33,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:33:33,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 14:33:33,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:33:33,551 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:33:33,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:33:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:33:33,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:33:33,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096173203] [2022-11-23 14:33:33,617 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:33:33,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966386304] [2022-11-23 14:33:33,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966386304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:33:33,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [991009237] [2022-11-23 14:33:33,619 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-23 14:33:33,620 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:33:33,620 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:33:33,620 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:33:33,620 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:33:33,997 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 51 for LOIs [2022-11-23 14:33:34,056 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:33:34,728 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1807#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:33:34,728 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:33:34,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:33:34,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2022-11-23 14:33:34,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728378013] [2022-11-23 14:33:34,729 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:33:34,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:33:34,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:33:34,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:33:34,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-11-23 14:33:34,730 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 14:33:34,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:33:34,837 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2022-11-23 14:33:34,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:33:34,837 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 39 [2022-11-23 14:33:34,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:33:34,838 INFO L225 Difference]: With dead ends: 53 [2022-11-23 14:33:34,838 INFO L226 Difference]: Without dead ends: 48 [2022-11-23 14:33:34,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 95 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:33:34,839 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:33:34,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:33:34,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-23 14:33:34,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-23 14:33:34,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 14:33:34,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-11-23 14:33:34,848 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 39 [2022-11-23 14:33:34,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:33:34,848 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-11-23 14:33:34,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 14:33:34,848 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-11-23 14:33:34,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 14:33:34,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:33:34,849 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1] [2022-11-23 14:33:34,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 14:33:35,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:35,055 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:33:35,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:33:35,056 INFO L85 PathProgramCache]: Analyzing trace with hash 387926653, now seen corresponding path program 4 times [2022-11-23 14:33:35,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:33:35,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914751359] [2022-11-23 14:33:35,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:35,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:33:35,064 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:33:35,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429321782] [2022-11-23 14:33:35,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:33:35,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:35,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:33:35,066 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:33:35,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 14:33:35,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:35,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-23 14:33:35,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:33:35,375 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 21 proven. 41 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 14:33:35,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:33:39,490 WARN L837 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-23 14:33:59,583 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_71| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_71|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| 2)) 4) 0)))) is different from true [2022-11-23 14:34:17,633 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_71| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_71|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| 2)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-23 14:34:25,685 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-23 14:34:27,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:34:27,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914751359] [2022-11-23 14:34:27,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:34:27,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429321782] [2022-11-23 14:34:27,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429321782] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:34:27,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [817169837] [2022-11-23 14:34:27,713 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-23 14:34:27,713 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:34:27,713 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:34:27,713 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:34:27,713 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:34:28,104 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-11-23 14:34:28,184 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:34:29,851 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2155#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-23 14:34:29,851 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:34:29,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:34:29,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-11-23 14:34:29,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996265905] [2022-11-23 14:34:29,851 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 14:34:29,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 14:34:29,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:34:29,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 14:34:29,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=487, Unknown=4, NotChecked=188, Total=756 [2022-11-23 14:34:29,853 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 14:34:30,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:34:30,181 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2022-11-23 14:34:30,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:34:30,182 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 45 [2022-11-23 14:34:30,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:34:30,182 INFO L225 Difference]: With dead ends: 55 [2022-11-23 14:34:30,183 INFO L226 Difference]: Without dead ends: 50 [2022-11-23 14:34:30,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=98, Invalid=616, Unknown=4, NotChecked=212, Total=930 [2022-11-23 14:34:30,184 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:34:30,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 143 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:34:30,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-23 14:34:30,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-23 14:34:30,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 14:34:30,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2022-11-23 14:34:30,201 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 45 [2022-11-23 14:34:30,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:34:30,201 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2022-11-23 14:34:30,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 14:34:30,202 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2022-11-23 14:34:30,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-23 14:34:30,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:34:30,203 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2022-11-23 14:34:30,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 14:34:30,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 14:34:30,409 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:34:30,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:34:30,409 INFO L85 PathProgramCache]: Analyzing trace with hash -79354270, now seen corresponding path program 3 times [2022-11-23 14:34:30,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:34:30,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710345295] [2022-11-23 14:34:30,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:30,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:34:30,417 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:34:30,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1572976938] [2022-11-23 14:34:30,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:34:30,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:34:30,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:34:30,419 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:34:30,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 14:34:30,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:34:30,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-11-23 14:34:30,514 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 14:34:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:34:30,597 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 14:34:30,598 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 14:34:30,599 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-23 14:34:30,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 14:34:30,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 14:34:30,813 INFO L444 BasicCegarLoop]: Path program histogram: [4, 3, 1, 1, 1, 1] [2022-11-23 14:34:30,818 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 14:34:30,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:34:30 BoogieIcfgContainer [2022-11-23 14:34:30,898 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 14:34:30,899 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 14:34:30,899 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 14:34:30,899 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 14:34:30,900 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:32:18" (3/4) ... [2022-11-23 14:34:30,903 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-23 14:34:30,989 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/witness.graphml [2022-11-23 14:34:30,989 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 14:34:30,990 INFO L158 Benchmark]: Toolchain (without parser) took 133014.83ms. Allocated memory was 146.8MB in the beginning and 230.7MB in the end (delta: 83.9MB). Free memory was 103.1MB in the beginning and 196.4MB in the end (delta: -93.4MB). Peak memory consumption was 126.8MB. Max. memory is 16.1GB. [2022-11-23 14:34:30,990 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 146.8MB. Free memory is still 90.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:34:30,991 INFO L158 Benchmark]: CACSL2BoogieTranslator took 255.91ms. Allocated memory is still 146.8MB. Free memory was 102.8MB in the beginning and 92.5MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 14:34:30,991 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.32ms. Allocated memory is still 146.8MB. Free memory was 92.5MB in the beginning and 90.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 14:34:30,992 INFO L158 Benchmark]: Boogie Preprocessor took 40.72ms. Allocated memory is still 146.8MB. Free memory was 90.9MB in the beginning and 89.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:34:30,992 INFO L158 Benchmark]: RCFGBuilder took 282.75ms. Allocated memory is still 146.8MB. Free memory was 89.7MB in the beginning and 79.3MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 14:34:30,992 INFO L158 Benchmark]: TraceAbstraction took 132293.48ms. Allocated memory was 146.8MB in the beginning and 230.7MB in the end (delta: 83.9MB). Free memory was 78.4MB in the beginning and 66.6MB in the end (delta: 11.9MB). Peak memory consumption was 97.3MB. Max. memory is 16.1GB. [2022-11-23 14:34:30,993 INFO L158 Benchmark]: Witness Printer took 90.97ms. Allocated memory is still 230.7MB. Free memory was 66.6MB in the beginning and 196.4MB in the end (delta: -129.9MB). Peak memory consumption was 4.3MB. Max. memory is 16.1GB. [2022-11-23 14:34:30,995 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 146.8MB. Free memory is still 90.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 255.91ms. Allocated memory is still 146.8MB. Free memory was 102.8MB in the beginning and 92.5MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.32ms. Allocated memory is still 146.8MB. Free memory was 92.5MB in the beginning and 90.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.72ms. Allocated memory is still 146.8MB. Free memory was 90.9MB in the beginning and 89.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 282.75ms. Allocated memory is still 146.8MB. Free memory was 89.7MB in the beginning and 79.3MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 132293.48ms. Allocated memory was 146.8MB in the beginning and 230.7MB in the end (delta: 83.9MB). Free memory was 78.4MB in the beginning and 66.6MB in the end (delta: 11.9MB). Peak memory consumption was 97.3MB. Max. memory is 16.1GB. * Witness Printer took 90.97ms. Allocated memory is still 230.7MB. Free memory was 66.6MB in the beginning and 196.4MB in the end (delta: -129.9MB). Peak memory consumption was 4.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [c=0, counter=0, k=6, x=0, y=0] [L27] EXPR counter++ VAL [c=0, counter=1, counter++=0, k=6, x=0, y=0] [L27] COND TRUE counter++<5 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [counter=1, unknown-#in~cond-unknown=1] [L10] COND FALSE !(!(cond)) VAL [cond=1, counter=1, unknown-#in~cond-unknown=1] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=0, counter=1, k=6, x=0, y=0] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=1, counter=1, k=6, x=1, y=1] [L27] EXPR counter++ VAL [c=1, counter=2, counter++=1, k=6, x=1, y=1] [L27] COND TRUE counter++<5 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [counter=2, unknown-#in~cond-unknown=1] [L10] COND FALSE !(!(cond)) VAL [cond=1, counter=2, unknown-#in~cond-unknown=1] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=1, counter=2, k=6, x=1, y=1] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=2, counter=2, k=6, x=9, y=2] [L27] EXPR counter++ VAL [c=2, counter=3, counter++=2, k=6, x=9, y=2] [L27] COND TRUE counter++<5 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [counter=3, unknown-#in~cond-unknown=1] [L10] COND FALSE !(!(cond)) VAL [cond=1, counter=3, unknown-#in~cond-unknown=1] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=2, counter=3, k=6, x=9, y=2] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=3, counter=3, k=6, x=36, y=3] [L27] EXPR counter++ VAL [c=3, counter=4, counter++=3, k=6, x=36, y=3] [L27] COND TRUE counter++<5 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [counter=4, unknown-#in~cond-unknown=1] [L10] COND FALSE !(!(cond)) VAL [cond=1, counter=4, unknown-#in~cond-unknown=1] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=3, counter=4, k=6, x=36, y=3] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=4, counter=4, k=6, x=100, y=4] [L27] EXPR counter++ VAL [c=4, counter=5, counter++=4, k=6, x=100, y=4] [L27] COND TRUE counter++<5 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [counter=5, unknown-#in~cond-unknown=1] [L10] COND FALSE !(!(cond)) VAL [cond=1, counter=5, unknown-#in~cond-unknown=1] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=4, counter=5, k=6, x=100, y=4] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=5, counter=5, k=6, x=225, y=5] [L27] EXPR counter++ VAL [c=5, counter=6, counter++=5, k=6, x=225, y=5] [L27] COND FALSE !(counter++<5) [L37] CALL __VERIFIER_assert(k*y - (y*y) == 0) VAL [counter=6, unknown-#in~cond-unknown=0] [L10] COND TRUE !(cond) VAL [cond=0, counter=6, unknown-#in~cond-unknown=0] [L12] reach_error() VAL [cond=0, counter=6, unknown-#in~cond-unknown=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 132.1s, OverallIterations: 11, TraceHistogramMax: 6, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 98 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 93 mSDsluCounter, 665 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 516 mSDsCounter, 32 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 765 IncrementalHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 32 mSolverCounterUnsat, 149 mSDtfsCounter, 765 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 556 GetRequests, 383 SyntacticMatches, 7 SemanticMatches, 166 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 32.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=10, InterpolantAutomatonStates: 84, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 10 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 111.5s InterpolantComputationTime, 281 NumberOfCodeBlocks, 281 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 277 ConstructedInterpolants, 0 QuantifiedInterpolants, 1061 SizeOfPredicates, 24 NumberOfNonLiveVariables, 862 ConjunctsInSsa, 153 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 147/334 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-23 14:34:31,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c90e15c-4875-4a72-a2ed-c1e388b82342/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE