./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --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 462bdab67ac93ddd789186f30bfdfc189629d2959c27ec219da5960b800d2042 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:02:45,141 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:02:45,206 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 14:02:45,210 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:02:45,211 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:02:45,236 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:02:45,237 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:02:45,237 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:02:45,238 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:02:45,238 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:02:45,239 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:02:45,239 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:02:45,240 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:02:45,240 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 14:02:45,241 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:02:45,241 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:02:45,242 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 14:02:45,242 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 14:02:45,243 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:02:45,243 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 14:02:45,244 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 14:02:45,244 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 14:02:45,245 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:02:45,245 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 14:02:45,246 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 14:02:45,246 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 14:02:45,246 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 14:02:45,247 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:02:45,247 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 14:02:45,247 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:02:45,248 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 14:02:45,248 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 14:02:45,248 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 14:02:45,249 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:02:45,249 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:02:45,249 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:02:45,249 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:02:45,249 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:02:45,250 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:02:45,250 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:02:45,250 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 14:02:45,250 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 14:02:45,250 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 14:02:45,251 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:02:45,251 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 14:02:45,251 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:02:45,251 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:02:45,251 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 462bdab67ac93ddd789186f30bfdfc189629d2959c27ec219da5960b800d2042 [2023-12-02 14:02:45,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:02:45,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:02:45,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:02:45,488 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:02:45,488 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:02:45,490 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i [2023-12-02 14:02:48,277 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:02:48,433 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:02:48,433 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i [2023-12-02 14:02:48,440 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/data/0b433f5c3/1dfcfc7a83474b84b2c46505626016db/FLAG011e9dd70 [2023-12-02 14:02:48,453 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/data/0b433f5c3/1dfcfc7a83474b84b2c46505626016db [2023-12-02 14:02:48,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:02:48,457 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:02:48,458 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:02:48,458 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:02:48,463 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:02:48,464 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:02:48" (1/1) ... [2023-12-02 14:02:48,465 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6146e689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:02:48, skipping insertion in model container [2023-12-02 14:02:48,465 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:02:48" (1/1) ... [2023-12-02 14:02:48,485 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:02:48,612 WARN L240 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_2c7a3519-1040-4f16-9706-01ae5e18b102/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i[950,963] [2023-12-02 14:02:48,628 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:02:48,636 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 14:02:48,647 WARN L240 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_2c7a3519-1040-4f16-9706-01ae5e18b102/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i[950,963] [2023-12-02 14:02:48,653 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:02:48,665 INFO L206 MainTranslator]: Completed translation [2023-12-02 14:02:48,665 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:02:48 WrapperNode [2023-12-02 14:02:48,665 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:02:48,666 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 14:02:48,666 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 14:02:48,667 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 14:02:48,672 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:02:48" (1/1) ... [2023-12-02 14:02:48,677 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:02:48" (1/1) ... [2023-12-02 14:02:48,692 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2023-12-02 14:02:48,692 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 14:02:48,693 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 14:02:48,693 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 14:02:48,693 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 14:02:48,700 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:02:48" (1/1) ... [2023-12-02 14:02:48,700 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:02:48" (1/1) ... [2023-12-02 14:02:48,702 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:02:48" (1/1) ... [2023-12-02 14:02:48,702 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:02:48" (1/1) ... [2023-12-02 14:02:48,705 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:02:48" (1/1) ... [2023-12-02 14:02:48,709 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:02:48" (1/1) ... [2023-12-02 14:02:48,710 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:02:48" (1/1) ... [2023-12-02 14:02:48,711 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:02:48" (1/1) ... [2023-12-02 14:02:48,713 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 14:02:48,714 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 14:02:48,715 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 14:02:48,715 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 14:02:48,716 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:02:48" (1/1) ... [2023-12-02 14:02:48,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:02:48,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:02:48,741 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 14:02:48,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 14:02:48,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 14:02:48,779 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 14:02:48,779 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 14:02:48,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 14:02:48,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 14:02:48,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 14:02:48,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 14:02:48,780 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 14:02:48,837 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 14:02:48,838 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 14:02:48,967 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 14:02:49,010 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 14:02:49,010 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 14:02:49,012 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:02:49 BoogieIcfgContainer [2023-12-02 14:02:49,012 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 14:02:49,014 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 14:02:49,014 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 14:02:49,017 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 14:02:49,017 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:02:48" (1/3) ... [2023-12-02 14:02:49,018 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17fd0339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:02:49, skipping insertion in model container [2023-12-02 14:02:49,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:02:48" (2/3) ... [2023-12-02 14:02:49,019 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17fd0339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:02:49, skipping insertion in model container [2023-12-02 14:02:49,019 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:02:49" (3/3) ... [2023-12-02 14:02:49,020 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound50.i [2023-12-02 14:02:49,035 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 14:02:49,035 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 14:02:49,075 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:02:49,081 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=LoopHeads, 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;@2bd3a1a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:02:49,082 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 14:02:49,085 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 14:02:49,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 14:02:49,092 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:02:49,093 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:02:49,094 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:02:49,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:02:49,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1734137638, now seen corresponding path program 1 times [2023-12-02 14:02:49,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:02:49,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797178319] [2023-12-02 14:02:49,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:49,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:02:49,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:49,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:02:49,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797178319] [2023-12-02 14:02:49,214 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-02 14:02:49,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498755018] [2023-12-02 14:02:49,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:49,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:49,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:02:49,220 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:02:49,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 14:02:49,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:49,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 14:02:49,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:02:49,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:02:49,308 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:02:49,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498755018] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:02:49,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:02:49,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 14:02:49,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47524468] [2023-12-02 14:02:49,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:02:49,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 14:02:49,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:02:49,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 14:02:49,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 14:02:49,345 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 14:02:49,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:02:49,372 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2023-12-02 14:02:49,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 14:02:49,375 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2023-12-02 14:02:49,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:02:49,382 INFO L225 Difference]: With dead ends: 35 [2023-12-02 14:02:49,382 INFO L226 Difference]: Without dead ends: 20 [2023-12-02 14:02:49,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 14:02:49,389 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:02:49,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:02:49,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-02 14:02:49,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-12-02 14:02:49,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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) [2023-12-02 14:02:49,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2023-12-02 14:02:49,426 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 14 [2023-12-02 14:02:49,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:02:49,428 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2023-12-02 14:02:49,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 14:02:49,428 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2023-12-02 14:02:49,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 14:02:49,430 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:02:49,430 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:02:49,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 14:02:49,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 14:02:49,631 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:02:49,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:02:49,632 INFO L85 PathProgramCache]: Analyzing trace with hash -207211284, now seen corresponding path program 1 times [2023-12-02 14:02:49,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:02:49,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651137937] [2023-12-02 14:02:49,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:49,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:02:49,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:49,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:02:49,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651137937] [2023-12-02 14:02:49,670 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-02 14:02:49,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234979382] [2023-12-02 14:02:49,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:49,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:49,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:02:49,672 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:02:49,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 14:02:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:49,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 14:02:49,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:02:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:02:49,787 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:02:49,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234979382] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:02:49,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:02:49,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:02:49,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972223294] [2023-12-02 14:02:49,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:02:49,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:02:49,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:02:49,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:02:49,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:02:49,789 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 14:02:49,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:02:49,812 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2023-12-02 14:02:49,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 14:02:49,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2023-12-02 14:02:49,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:02:49,813 INFO L225 Difference]: With dead ends: 33 [2023-12-02 14:02:49,813 INFO L226 Difference]: Without dead ends: 22 [2023-12-02 14:02:49,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:02:49,815 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:02:49,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:02:49,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-02 14:02:49,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-12-02 14:02:49,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 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) [2023-12-02 14:02:49,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-12-02 14:02:49,822 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 16 [2023-12-02 14:02:49,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:02:49,823 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-12-02 14:02:49,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 14:02:49,823 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-12-02 14:02:49,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 14:02:49,824 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:02:49,824 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:02:49,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 14:02:50,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:50,025 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:02:50,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:02:50,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1776102932, now seen corresponding path program 1 times [2023-12-02 14:02:50,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:02:50,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564804561] [2023-12-02 14:02:50,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:50,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:02:50,046 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:02:50,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [320158849] [2023-12-02 14:02:50,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:50,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:50,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:02:50,048 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:02:50,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 14:02:50,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:50,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 14:02:50,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:02:50,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:02:50,344 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:02:50,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:02:50,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564804561] [2023-12-02 14:02:50,345 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:02:50,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320158849] [2023-12-02 14:02:50,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320158849] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:02:50,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:02:50,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 14:02:50,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042004931] [2023-12-02 14:02:50,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:02:50,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 14:02:50,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:02:50,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 14:02:50,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-12-02 14:02:50,348 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:02:50,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:02:50,493 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2023-12-02 14:02:50,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 14:02:50,493 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-12-02 14:02:50,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:02:50,495 INFO L225 Difference]: With dead ends: 34 [2023-12-02 14:02:50,495 INFO L226 Difference]: Without dead ends: 31 [2023-12-02 14:02:50,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-12-02 14:02:50,497 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:02:50,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 78 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:02:50,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-02 14:02:50,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-12-02 14:02:50,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 14:02:50,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-12-02 14:02:50,508 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 17 [2023-12-02 14:02:50,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:02:50,508 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-12-02 14:02:50,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:02:50,509 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-12-02 14:02:50,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 14:02:50,510 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:02:50,510 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:02:50,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 14:02:50,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:50,716 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:02:50,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:02:50,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1737998361, now seen corresponding path program 1 times [2023-12-02 14:02:50,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:02:50,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340816550] [2023-12-02 14:02:50,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:50,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:02:50,727 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:02:50,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102675773] [2023-12-02 14:02:50,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:50,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:50,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:02:50,729 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:02:50,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 14:02:50,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:50,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 14:02:50,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:02:50,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:02:50,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:02:50,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:02:50,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:02:50,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340816550] [2023-12-02 14:02:50,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:02:50,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102675773] [2023-12-02 14:02:50,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102675773] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:02:50,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2053666908] [2023-12-02 14:02:50,870 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-12-02 14:02:50,870 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:02:50,874 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:02:50,879 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:02:50,879 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:02:51,455 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-12-02 14:02:51,471 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2023-12-02 14:02:51,474 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:02:52,180 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '536#(and (<= 2 ~counter~0) (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_2| Int)) (not (= (mod |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_2| 4294967296) (mod |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_2| 4294967296)))) (<= ~counter~0 50) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 14:02:52,180 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:02:52,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:02:52,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-12-02 14:02:52,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808456142] [2023-12-02 14:02:52,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:02:52,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 14:02:52,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:02:52,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 14:02:52,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2023-12-02 14:02:52,183 INFO L87 Difference]: Start difference. First operand 31 states and 37 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 14:02:52,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:02:52,291 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2023-12-02 14:02:52,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 14:02:52,291 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 19 [2023-12-02 14:02:52,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:02:52,293 INFO L225 Difference]: With dead ends: 62 [2023-12-02 14:02:52,293 INFO L226 Difference]: Without dead ends: 51 [2023-12-02 14:02:52,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2023-12-02 14:02:52,295 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 30 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:02:52,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 92 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:02:52,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-02 14:02:52,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2023-12-02 14:02:52,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 14:02:52,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2023-12-02 14:02:52,306 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 19 [2023-12-02 14:02:52,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:02:52,306 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2023-12-02 14:02:52,306 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 14:02:52,307 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2023-12-02 14:02:52,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 14:02:52,308 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:02:52,308 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:02:52,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 14:02:52,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:52,513 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:02:52,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:02:52,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1948059783, now seen corresponding path program 1 times [2023-12-02 14:02:52,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:02:52,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521960748] [2023-12-02 14:02:52,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:52,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:02:52,528 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:02:52,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508702936] [2023-12-02 14:02:52,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:52,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:52,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:02:52,531 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:02:52,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 14:02:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:52,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 14:02:52,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:02:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:02:52,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:02:52,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:02:52,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:02:52,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521960748] [2023-12-02 14:02:52,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:02:52,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508702936] [2023-12-02 14:02:52,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508702936] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 14:02:52,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:02:52,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-12-02 14:02:52,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993884216] [2023-12-02 14:02:52,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:02:52,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:02:52,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:02:52,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:02:52,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-12-02 14:02:52,882 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 14:02:53,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:02:53,008 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2023-12-02 14:02:53,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:02:53,009 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-12-02 14:02:53,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:02:53,010 INFO L225 Difference]: With dead ends: 50 [2023-12-02 14:02:53,010 INFO L226 Difference]: Without dead ends: 47 [2023-12-02 14:02:53,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-12-02 14:02:53,012 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:02:53,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 61 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:02:53,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-02 14:02:53,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2023-12-02 14:02:53,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 14:02:53,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2023-12-02 14:02:53,024 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 20 [2023-12-02 14:02:53,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:02:53,025 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2023-12-02 14:02:53,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 14:02:53,025 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2023-12-02 14:02:53,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 14:02:53,026 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:02:53,026 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:02:53,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 14:02:53,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:53,227 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:02:53,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:02:53,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1825805005, now seen corresponding path program 1 times [2023-12-02 14:02:53,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:02:53,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613231925] [2023-12-02 14:02:53,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:53,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:02:53,240 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:02:53,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942965311] [2023-12-02 14:02:53,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:53,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:53,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:02:53,242 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:02:53,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 14:02:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:53,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 14:02:53,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:02:53,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:02:53,311 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:02:53,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:02:53,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613231925] [2023-12-02 14:02:53,312 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:02:53,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942965311] [2023-12-02 14:02:53,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942965311] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:02:53,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:02:53,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:02:53,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317147639] [2023-12-02 14:02:53,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:02:53,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:02:53,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:02:53,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:02:53,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:02:53,314 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 14:02:53,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:02:53,342 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2023-12-02 14:02:53,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:02:53,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2023-12-02 14:02:53,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:02:53,343 INFO L225 Difference]: With dead ends: 54 [2023-12-02 14:02:53,343 INFO L226 Difference]: Without dead ends: 39 [2023-12-02 14:02:53,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:02:53,345 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:02:53,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:02:53,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-12-02 14:02:53,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-12-02 14:02:53,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 31 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 14:02:53,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2023-12-02 14:02:53,356 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 25 [2023-12-02 14:02:53,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:02:53,356 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2023-12-02 14:02:53,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 14:02:53,357 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2023-12-02 14:02:53,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 14:02:53,358 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:02:53,358 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:02:53,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 14:02:53,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:53,560 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:02:53,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:02:53,561 INFO L85 PathProgramCache]: Analyzing trace with hash -810539866, now seen corresponding path program 1 times [2023-12-02 14:02:53,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:02:53,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138920093] [2023-12-02 14:02:53,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:53,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:02:53,574 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:02:53,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [645970146] [2023-12-02 14:02:53,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:53,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:53,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:02:53,576 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:02:53,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 14:02:55,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:55,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 14:02:55,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:02:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:02:58,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:03:06,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:03:06,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:03:06,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138920093] [2023-12-02 14:03:06,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:03:06,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645970146] [2023-12-02 14:03:06,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645970146] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:03:06,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2109857025] [2023-12-02 14:03:06,572 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-12-02 14:03:06,573 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:03:06,573 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:03:06,573 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:03:06,574 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:03:07,524 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2023-12-02 14:03:07,542 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2023-12-02 14:03:07,544 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:03:14,884 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1329#(and (exists ((|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_16| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_15| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_15| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_15| Int)) (not (= (mod |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_15| 4294967296) (mod (+ (* |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_16| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_15|) |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_15|) 4294967296)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 14:03:14,884 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:03:14,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:03:14,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2023-12-02 14:03:14,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386199185] [2023-12-02 14:03:14,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:03:14,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 14:03:14,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:03:14,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 14:03:14,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=770, Unknown=2, NotChecked=0, Total=870 [2023-12-02 14:03:14,886 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 17 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 14:03:42,494 WARN L293 SmtUtils]: Spent 14.86s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 14:03:45,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:03:48,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:03:50,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:03:52,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:03:55,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:04:03,479 WARN L293 SmtUtils]: Spent 5.35s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 14:04:04,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 14:04:08,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:04:10,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:04:14,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:04:16,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:04:20,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:04:22,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:04:24,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:04:25,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:04:25,285 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2023-12-02 14:04:25,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 14:04:25,286 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 28 [2023-12-02 14:04:25,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:04:25,287 INFO L225 Difference]: With dead ends: 76 [2023-12-02 14:04:25,287 INFO L226 Difference]: Without dead ends: 72 [2023-12-02 14:04:25,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 49.6s TimeCoverageRelationStatistics Valid=197, Invalid=1358, Unknown=5, NotChecked=0, Total=1560 [2023-12-02 14:04:25,289 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 105 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 25 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.5s IncrementalHoareTripleChecker+Time [2023-12-02 14:04:25,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 189 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 167 Invalid, 9 Unknown, 0 Unchecked, 30.5s Time] [2023-12-02 14:04:25,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-12-02 14:04:25,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2023-12-02 14:04:25,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 47 states have internal predecessors, (52), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 14:04:25,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2023-12-02 14:04:25,309 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 28 [2023-12-02 14:04:25,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:04:25,309 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2023-12-02 14:04:25,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 14:04:25,310 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2023-12-02 14:04:25,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 14:04:25,311 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:04:25,311 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:04:25,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 14:04:25,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:04:25,512 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:04:25,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:04:25,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1487974853, now seen corresponding path program 2 times [2023-12-02 14:04:25,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:04:25,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528737859] [2023-12-02 14:04:25,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:04:25,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:04:25,524 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:04:25,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1927115709] [2023-12-02 14:04:25,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:04:25,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:04:25,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:04:25,526 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:04:25,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 14:04:46,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 14:04:46,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:04:46,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 14:04:46,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:04:46,673 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 14:04:46,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:04:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 14:04:46,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:04:46,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528737859] [2023-12-02 14:04:46,969 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:04:46,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927115709] [2023-12-02 14:04:46,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927115709] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:04:46,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1083082781] [2023-12-02 14:04:46,971 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-12-02 14:04:46,971 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:04:46,972 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:04:46,972 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:04:46,972 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:04:47,744 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2023-12-02 14:04:47,762 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2023-12-02 14:04:47,764 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:04:51,034 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1773#(and (exists ((|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_29| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_24| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_25| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_24| Int)) (not (= (mod |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_24| 4294967296) (mod (+ (* |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_29| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_24|) |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_25|) 4294967296)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 14:04:51,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:04:51,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:04:51,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2023-12-02 14:04:51,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179325695] [2023-12-02 14:04:51,035 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:04:51,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 14:04:51,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:04:51,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 14:04:51,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2023-12-02 14:04:51,036 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 14:04:51,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:04:51,773 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2023-12-02 14:04:51,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 14:04:51,773 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 36 [2023-12-02 14:04:51,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:04:51,775 INFO L225 Difference]: With dead ends: 78 [2023-12-02 14:04:51,775 INFO L226 Difference]: Without dead ends: 59 [2023-12-02 14:04:51,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2023-12-02 14:04:51,777 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 14:04:51,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 135 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 14:04:51,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-02 14:04:51,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2023-12-02 14:04:51,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 47 states have internal predecessors, (51), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 14:04:51,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2023-12-02 14:04:51,794 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2023-12-02 14:04:51,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:04:51,794 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2023-12-02 14:04:51,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 14:04:51,795 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2023-12-02 14:04:51,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 14:04:51,796 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:04:51,796 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:04:51,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-02 14:04:51,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:04:51,997 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:04:51,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:04:51,997 INFO L85 PathProgramCache]: Analyzing trace with hash 101539275, now seen corresponding path program 1 times [2023-12-02 14:04:51,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:04:51,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857678839] [2023-12-02 14:04:51,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:04:51,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:04:52,010 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:04:52,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1814031276] [2023-12-02 14:04:52,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:04:52,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:04:52,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:04:52,011 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:04:52,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 14:04:52,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:04:52,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 14:04:52,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:04:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 14:04:52,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:04:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 14:04:52,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:04:52,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857678839] [2023-12-02 14:04:52,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:04:52,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814031276] [2023-12-02 14:04:52,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814031276] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:04:52,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1999316220] [2023-12-02 14:04:52,184 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-12-02 14:04:52,184 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:04:52,184 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:04:52,184 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:04:52,184 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:04:52,537 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 14:04:52,569 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2023-12-02 14:04:52,571 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:04:53,226 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2204#(and (exists ((|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_36| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_31| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_32| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_31| Int)) (not (= (mod |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_31| 4294967296) (mod (+ (* |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_36| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_31|) |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_32|) 4294967296)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_#t~post4#1_34| Int)) (and (<= 2 ~counter~0) (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_#t~post4#1_34| 49) (<= 1 |v_ULTIMATE.start_main_#t~post4#1_34|))))' at error location [2023-12-02 14:04:53,227 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:04:53,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:04:53,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-12-02 14:04:53,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750992808] [2023-12-02 14:04:53,227 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:04:53,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 14:04:53,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:04:53,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 14:04:53,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2023-12-02 14:04:53,229 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 14:04:53,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:04:53,486 INFO L93 Difference]: Finished difference Result 185 states and 213 transitions. [2023-12-02 14:04:53,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 14:04:53,486 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 36 [2023-12-02 14:04:53,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:04:53,487 INFO L225 Difference]: With dead ends: 185 [2023-12-02 14:04:53,488 INFO L226 Difference]: Without dead ends: 166 [2023-12-02 14:04:53,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=283, Invalid=1123, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 14:04:53,489 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 94 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:04:53,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 173 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:04:53,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-12-02 14:04:53,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 65. [2023-12-02 14:04:53,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 55 states have internal predecessors, (66), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 14:04:53,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2023-12-02 14:04:53,504 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 36 [2023-12-02 14:04:53,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:04:53,504 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2023-12-02 14:04:53,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 14:04:53,504 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2023-12-02 14:04:53,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 14:04:53,505 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:04:53,506 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:04:53,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 14:04:53,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:04:53,711 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:04:53,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:04:53,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1031037811, now seen corresponding path program 3 times [2023-12-02 14:04:53,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:04:53,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550508308] [2023-12-02 14:04:53,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:04:53,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:04:53,723 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:04:53,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696111900] [2023-12-02 14:04:53,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 14:04:53,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:04:53,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:04:53,725 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:04:53,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 14:04:57,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 14:04:57,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:04:57,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 14:04:57,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:05:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:05:27,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:05:47,949 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:05:47,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:05:47,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550508308] [2023-12-02 14:05:47,950 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:05:47,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696111900] [2023-12-02 14:05:47,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696111900] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:05:47,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1929873707] [2023-12-02 14:05:47,952 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-12-02 14:05:47,952 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:05:47,953 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:05:47,953 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:05:47,953 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:05:48,742 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2023-12-02 14:05:48,755 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2023-12-02 14:05:48,756 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:06:01,693 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2819#(and (exists ((|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_48| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_43| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_44| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_43| Int)) (not (= (mod (+ |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_44| (* |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_48| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_43|)) 4294967296) (mod |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_43| 4294967296)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 14:06:01,693 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:06:01,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:06:01,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2023-12-02 14:06:01,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112669860] [2023-12-02 14:06:01,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:06:01,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 14:06:01,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:06:01,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 14:06:01,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1045, Unknown=7, NotChecked=0, Total=1190 [2023-12-02 14:06:01,695 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 14:06:04,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 14:06:09,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 14:06:27,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 14:06:29,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 14:07:35,134 WARN L293 SmtUtils]: Spent 42.27s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 14:07:52,139 WARN L293 SmtUtils]: Spent 8.77s on a formula simplification. DAG size of input: 57 DAG size of output: 43 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 14:07:54,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:07:57,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:07:59,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:08:02,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:08:04,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:08:06,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:08:08,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:08:10,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:08:12,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:08:43,849 WARN L293 SmtUtils]: Spent 18.24s on a formula simplification that was a NOOP. DAG size: 77 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 14:08:45,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:08:47,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:08:49,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:08:51,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:08:53,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:08:55,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:09:25,444 WARN L293 SmtUtils]: Spent 16.97s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 14:09:27,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:09:29,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:09:31,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:09:33,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:09:50,188 WARN L293 SmtUtils]: Spent 7.23s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 14:09:53,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:09:55,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:09:56,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:09:58,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:09:59,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:10:09,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:10:11,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:10:13,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:10:32,064 WARN L293 SmtUtils]: Spent 9.81s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 14:10:33,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:10:35,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:10:36,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:10:44,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:10:47,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:10:49,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:10:51,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:11:05,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:11:11,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:11:12,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:11:15,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:11:17,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:11:21,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:11:23,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:11:24,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:11:26,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:11:28,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:11:30,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:11:43,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:11:47,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:11:58,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:12:00,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:12:05,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:12:07,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:12:09,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:12:11,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:12:14,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:12:16,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:12:18,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:12:21,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:12:21,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:12:21,048 INFO L93 Difference]: Finished difference Result 127 states and 156 transitions. [2023-12-02 14:12:21,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-02 14:12:21,051 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2023-12-02 14:12:21,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:12:21,052 INFO L225 Difference]: With dead ends: 127 [2023-12-02 14:12:21,052 INFO L226 Difference]: Without dead ends: 122 [2023-12-02 14:12:21,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 292.4s TimeCoverageRelationStatistics Valid=555, Invalid=2835, Unknown=32, NotChecked=0, Total=3422 [2023-12-02 14:12:21,054 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 149 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 43 mSolverCounterUnsat, 45 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 132.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 45 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 133.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:12:21,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 351 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 284 Invalid, 45 Unknown, 0 Unchecked, 133.0s Time] [2023-12-02 14:12:21,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-12-02 14:12:21,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2023-12-02 14:12:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 74 states have internal predecessors, (84), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:12:21,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 105 transitions. [2023-12-02 14:12:21,092 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 105 transitions. Word has length 37 [2023-12-02 14:12:21,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:12:21,092 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 105 transitions. [2023-12-02 14:12:21,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 14:12:21,092 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 105 transitions. [2023-12-02 14:12:21,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 14:12:21,094 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:12:21,094 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:12:21,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 14:12:21,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 14:12:21,294 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:12:21,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:12:21,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1370364814, now seen corresponding path program 4 times [2023-12-02 14:12:21,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:12:21,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815253440] [2023-12-02 14:12:21,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:12:21,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:12:21,304 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:12:21,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1106861172] [2023-12-02 14:12:21,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 14:12:21,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:12:21,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:12:21,306 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:12:21,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a3519-1040-4f16-9706-01ae5e18b102/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 14:12:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:12:34,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-02 14:12:34,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:12:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:12:36,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:13:41,377 WARN L293 SmtUtils]: Spent 18.22s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 14:15:06,721 WARN L293 SmtUtils]: Spent 16.58s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 14:15:52,148 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse1 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296)) (.cse5 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648))) (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse0)) (< .cse1 (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296)) (let ((.cse3 (div .cse5 2))) (let ((.cse4 (* (div (+ (* (- 1) .cse5) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) 4294967296)) (.cse2 (* .cse3 4 |c_ULTIMATE.start_main_~q~0#1|))) (and (<= (+ (mod (+ (* 4294967295 |c_ULTIMATE.start_main_~A~0#1|) .cse2 4294967295 (* 2 .cse3)) 4294967296) |c_ULTIMATE.start_main_~r~0#1|) (+ 4294967295 .cse4 .cse5)) (let ((.cse6 (mod (+ (* 3 .cse3) .cse2) 4294967296))) (<= (+ .cse0 .cse3 .cse4 4294967296 (* (div (+ (- 1) (* (- 1) .cse3) (* (- 1) .cse0) .cse6) 4294967296) 4294967296) .cse5) (+ .cse6 |c_ULTIMATE.start_main_~r~0#1|)))))) (< (* 2 .cse5) (+ .cse1 1)) (= (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296) .cse5))) is different from true [2023-12-02 14:16:41,247 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse6 (mod |c_ULTIMATE.start_main_~b~0#1| 1073741824))) (let ((.cse1 (* 2 .cse6)) (.cse4 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse0 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (< .cse0 (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296)) (= (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296) .cse1) (let ((.cse7 (* .cse6 4 |c_ULTIMATE.start_main_~q~0#1|)) (.cse2 (* (div (+ (* (- 2) .cse6) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) 4294967296))) (and (let ((.cse3 (* .cse6 3))) (let ((.cse5 (mod (+ .cse3 .cse7) 4294967296))) (<= (+ .cse2 .cse3 .cse4 (* (div (+ (- 1) (* (- 1) .cse4) .cse5 (* (- 1) .cse6)) 4294967296) 4294967296) 4294967296) (+ |c_ULTIMATE.start_main_~r~0#1| .cse5)))) (<= (+ |c_ULTIMATE.start_main_~r~0#1| (mod (+ (* 4294967295 |c_ULTIMATE.start_main_~A~0#1|) 4294967295 .cse1 .cse7) 4294967296)) (+ .cse2 4294967295 .cse1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~b~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse4)) (< (* .cse6 4) (+ .cse0 1)) (< .cse0 (* 2 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648)))))) is different from true [2023-12-02 14:17:34,603 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 9 not checked. [2023-12-02 14:17:34,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:17:34,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815253440] [2023-12-02 14:17:34,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:17:34,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106861172] [2023-12-02 14:17:34,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106861172] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:17:34,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [229886097] [2023-12-02 14:17:34,606 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-12-02 14:17:34,606 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:17:34,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:17:34,607 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:17:34,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:17:35,242 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2023-12-02 14:17:35,256 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2023-12-02 14:17:35,257 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:17:58,980 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3434#(and (exists ((|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_57| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_58| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_57| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_62| Int)) (not (= (mod |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_57| 4294967296) (mod (+ (* |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_62| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_57|) |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_58|) 4294967296)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 14:17:58,980 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:17:58,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:17:58,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2023-12-02 14:17:58,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965667803] [2023-12-02 14:17:58,981 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:17:58,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 14:17:58,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:17:58,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 14:17:58,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=986, Unknown=17, NotChecked=130, Total=1260 [2023-12-02 14:17:58,983 INFO L87 Difference]: Start difference. First operand 88 states and 105 transitions. Second operand has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 20 states have internal predecessors, (52), 7 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-02 14:18:02,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []