./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound20.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_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/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_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound20.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/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_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/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 cc20d196113d3ae541f6b6d9413b3adf505f83f475b90cd277ec788090ea4b3d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:12:56,839 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:12:56,904 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 19:12:56,910 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:12:56,910 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:12:56,936 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:12:56,937 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:12:56,937 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:12:56,938 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:12:56,938 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:12:56,939 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:12:56,939 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:12:56,940 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:12:56,940 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 19:12:56,941 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:12:56,941 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:12:56,942 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 19:12:56,942 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 19:12:56,943 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:12:56,943 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 19:12:56,944 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 19:12:56,945 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 19:12:56,945 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:12:56,946 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 19:12:56,946 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 19:12:56,947 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:12:56,947 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 19:12:56,947 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:12:56,948 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 19:12:56,948 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:12:56,949 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 19:12:56,949 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 19:12:56,949 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 19:12:56,950 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:12:56,950 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:12:56,950 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:12:56,950 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:12:56,951 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:12:56,951 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:12:56,951 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:12:56,951 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 19:12:56,952 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 19:12:56,952 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 19:12:56,952 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:12:56,952 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 19:12:56,953 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:12:56,953 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:12:56,953 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_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc20d196113d3ae541f6b6d9413b3adf505f83f475b90cd277ec788090ea4b3d [2023-12-02 19:12:57,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:12:57,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:12:57,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:12:57,192 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:12:57,192 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:12:57,193 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound20.i [2023-12-02 19:12:59,911 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:13:00,083 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:13:00,084 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound20.i [2023-12-02 19:13:00,089 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/data/7edaab90c/a59c640bb52545be9671d683c923a6d8/FLAG02edff348 [2023-12-02 19:13:00,100 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/data/7edaab90c/a59c640bb52545be9671d683c923a6d8 [2023-12-02 19:13:00,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:13:00,104 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:13:00,105 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:13:00,105 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:13:00,109 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:13:00,110 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:13:00" (1/1) ... [2023-12-02 19:13:00,111 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33465183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:13:00, skipping insertion in model container [2023-12-02 19:13:00,111 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:13:00" (1/1) ... [2023-12-02 19:13:00,132 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:13:00,273 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_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound20.i[951,964] [2023-12-02 19:13:00,287 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:13:00,294 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:13:00,306 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_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound20.i[951,964] [2023-12-02 19:13:00,312 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:13:00,323 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:13:00,324 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:13:00 WrapperNode [2023-12-02 19:13:00,324 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:13:00,325 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:13:00,325 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:13:00,325 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:13:00,331 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:13:00" (1/1) ... [2023-12-02 19:13:00,337 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:13:00" (1/1) ... [2023-12-02 19:13:00,355 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2023-12-02 19:13:00,356 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:13:00,356 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:13:00,357 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:13:00,357 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:13:00,365 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:13:00" (1/1) ... [2023-12-02 19:13:00,365 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:13:00" (1/1) ... [2023-12-02 19:13:00,367 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:13:00" (1/1) ... [2023-12-02 19:13:00,367 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:13:00" (1/1) ... [2023-12-02 19:13:00,370 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:13:00" (1/1) ... [2023-12-02 19:13:00,373 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:13:00" (1/1) ... [2023-12-02 19:13:00,375 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:13:00" (1/1) ... [2023-12-02 19:13:00,375 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:13:00" (1/1) ... [2023-12-02 19:13:00,377 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:13:00,378 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:13:00,378 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:13:00,378 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:13:00,379 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:13:00" (1/1) ... [2023-12-02 19:13:00,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:13:00,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:13:00,409 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:13:00,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:13:00,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 19:13:00,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 19:13:00,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:13:00,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:13:00,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 19:13:00,446 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 19:13:00,501 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:13:00,503 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:13:00,626 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:13:00,666 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:13:00,666 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 19:13:00,668 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:13:00 BoogieIcfgContainer [2023-12-02 19:13:00,668 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:13:00,671 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:13:00,671 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:13:00,674 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:13:00,674 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:13:00" (1/3) ... [2023-12-02 19:13:00,675 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59910035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:13:00, skipping insertion in model container [2023-12-02 19:13:00,675 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:13:00" (2/3) ... [2023-12-02 19:13:00,675 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59910035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:13:00, skipping insertion in model container [2023-12-02 19:13:00,675 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:13:00" (3/3) ... [2023-12-02 19:13:00,677 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound20.i [2023-12-02 19:13:00,691 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:13:00,691 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 19:13:00,733 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:13:00,739 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;@2bc3c058, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:13:00,740 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 19:13:00,743 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 19:13:00,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 19:13:00,748 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:13:00,749 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:13:00,749 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:13:00,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:13:00,755 INFO L85 PathProgramCache]: Analyzing trace with hash 774102990, now seen corresponding path program 1 times [2023-12-02 19:13:00,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:13:00,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820550409] [2023-12-02 19:13:00,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:00,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:13:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:13:00,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:13:00,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820550409] [2023-12-02 19:13:00,869 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-02 19:13:00,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828503415] [2023-12-02 19:13:00,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:00,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:00,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:13:00,873 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:13:00,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 19:13:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:13:00,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 19:13:00,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:13:00,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:13:00,957 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:13:00,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828503415] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:13:00,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:13:00,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 19:13:00,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945948342] [2023-12-02 19:13:00,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:13:00,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 19:13:00,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:13:00,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 19:13:00,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 19:13:00,988 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:13:01,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:13:01,011 INFO L93 Difference]: Finished difference Result 30 states and 43 transitions. [2023-12-02 19:13:01,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 19:13:01,013 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 19:13:01,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:13:01,018 INFO L225 Difference]: With dead ends: 30 [2023-12-02 19:13:01,018 INFO L226 Difference]: Without dead ends: 15 [2023-12-02 19:13:01,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 19:13:01,024 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:13:01,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:13:01,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-12-02 19:13:01,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-12-02 19:13:01,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 19:13:01,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2023-12-02 19:13:01,059 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 7 [2023-12-02 19:13:01,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:13:01,060 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2023-12-02 19:13:01,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:13:01,060 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2023-12-02 19:13:01,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 19:13:01,061 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:13:01,061 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:13:01,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 19:13:01,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 19:13:01,264 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:13:01,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:13:01,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1084410172, now seen corresponding path program 1 times [2023-12-02 19:13:01,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:13:01,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145410359] [2023-12-02 19:13:01,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:01,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:13:01,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:13:01,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:13:01,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145410359] [2023-12-02 19:13:01,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-02 19:13:01,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390199753] [2023-12-02 19:13:01,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:01,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:01,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:13:01,289 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:13:01,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 19:13:01,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:13:01,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 19:13:01,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:13:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:13:01,370 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:13:01,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390199753] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:13:01,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:13:01,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:13:01,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332452586] [2023-12-02 19:13:01,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:13:01,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:13:01,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:13:01,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:13:01,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:13:01,373 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:13:01,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:13:01,392 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2023-12-02 19:13:01,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:13:01,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-02 19:13:01,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:13:01,394 INFO L225 Difference]: With dead ends: 28 [2023-12-02 19:13:01,394 INFO L226 Difference]: Without dead ends: 17 [2023-12-02 19:13:01,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:13:01,396 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:13:01,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:13:01,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-02 19:13:01,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-02 19:13:01,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 19:13:01,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-12-02 19:13:01,402 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2023-12-02 19:13:01,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:13:01,402 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-12-02 19:13:01,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:13:01,402 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-12-02 19:13:01,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 19:13:01,403 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:13:01,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:13:01,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 19:13:01,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:01,605 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:13:01,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:13:01,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1068718015, now seen corresponding path program 1 times [2023-12-02 19:13:01,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:13:01,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540895861] [2023-12-02 19:13:01,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:01,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:13:01,622 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:13:01,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1370230623] [2023-12-02 19:13:01,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:01,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:01,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:13:01,624 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:13:01,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 19:13:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:13:01,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 19:13:01,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:13:01,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:13:01,713 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:13:01,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:13:01,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540895861] [2023-12-02 19:13:01,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:13:01,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370230623] [2023-12-02 19:13:01,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370230623] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:13:01,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:13:01,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 19:13:01,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803655624] [2023-12-02 19:13:01,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:13:01,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:13:01,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:13:01,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:13:01,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:13:01,716 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:13:01,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:13:01,741 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2023-12-02 19:13:01,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:13:01,742 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 19:13:01,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:13:01,743 INFO L225 Difference]: With dead ends: 28 [2023-12-02 19:13:01,743 INFO L226 Difference]: Without dead ends: 21 [2023-12-02 19:13:01,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:13:01,744 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:13:01,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 55 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:13:01,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-02 19:13:01,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-12-02 19:13:01,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 19:13:01,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2023-12-02 19:13:01,750 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 10 [2023-12-02 19:13:01,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:13:01,750 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2023-12-02 19:13:01,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:13:01,751 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2023-12-02 19:13:01,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 19:13:01,751 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:13:01,751 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:13:01,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 19:13:01,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:01,952 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:13:01,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:13:01,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1066930555, now seen corresponding path program 1 times [2023-12-02 19:13:01,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:13:01,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506042833] [2023-12-02 19:13:01,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:01,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:13:01,962 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:13:01,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868114084] [2023-12-02 19:13:01,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:01,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:01,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:13:01,964 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:13:01,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 19:13:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:13:02,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 19:13:02,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:13:02,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:13:02,143 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:13:02,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:13:02,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506042833] [2023-12-02 19:13:02,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:13:02,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868114084] [2023-12-02 19:13:02,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868114084] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:13:02,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:13:02,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 19:13:02,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724493466] [2023-12-02 19:13:02,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:13:02,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 19:13:02,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:13:02,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 19:13:02,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:13:02,146 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:13:02,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:13:02,199 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2023-12-02 19:13:02,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 19:13:02,200 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 19:13:02,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:13:02,201 INFO L225 Difference]: With dead ends: 29 [2023-12-02 19:13:02,201 INFO L226 Difference]: Without dead ends: 26 [2023-12-02 19:13:02,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:13:02,203 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:13:02,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 59 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:13:02,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-02 19:13:02,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-02 19:13:02,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 19:13:02,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-12-02 19:13:02,209 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 10 [2023-12-02 19:13:02,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:13:02,210 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-12-02 19:13:02,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:13:02,210 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-12-02 19:13:02,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 19:13:02,211 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:13:02,211 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:13:02,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 19:13:02,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:02,412 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:13:02,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:13:02,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1531048614, now seen corresponding path program 1 times [2023-12-02 19:13:02,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:13:02,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099909485] [2023-12-02 19:13:02,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:02,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:13:02,421 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:13:02,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938082922] [2023-12-02 19:13:02,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:02,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:02,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:13:02,423 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:13:02,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 19:13:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:13:02,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 19:13:02,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:13:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:13:02,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:13:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:13:02,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:13:02,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099909485] [2023-12-02 19:13:02,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:13:02,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938082922] [2023-12-02 19:13:02,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938082922] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:13:02,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1140216480] [2023-12-02 19:13:02,539 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 19:13:02,539 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:13:02,542 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:13:02,547 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:13:02,548 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:13:03,003 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-12-02 19:13:03,042 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:13:03,659 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '468#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_2| Int)) (and (<= (mod (div |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_2| 2) 4294967296) (mod |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_2| 4294967296)) (= (mod |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_2| 2) 0) (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))))) (<= 22 ~counter~0))' at error location [2023-12-02 19:13:03,659 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:13:03,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 19:13:03,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-12-02 19:13:03,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046496805] [2023-12-02 19:13:03,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 19:13:03,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 19:13:03,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:13:03,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 19:13:03,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-12-02 19:13:03,661 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:13:03,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:13:03,768 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2023-12-02 19:13:03,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 19:13:03,769 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-02 19:13:03,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:13:03,769 INFO L225 Difference]: With dead ends: 57 [2023-12-02 19:13:03,770 INFO L226 Difference]: Without dead ends: 46 [2023-12-02 19:13:03,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2023-12-02 19:13:03,771 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:13:03,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 86 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:13:03,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-12-02 19:13:03,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2023-12-02 19:13:03,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 19:13:03,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2023-12-02 19:13:03,778 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 12 [2023-12-02 19:13:03,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:13:03,779 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2023-12-02 19:13:03,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:13:03,779 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2023-12-02 19:13:03,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 19:13:03,780 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:13:03,780 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:13:03,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 19:13:03,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:03,985 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:13:03,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:13:03,985 INFO L85 PathProgramCache]: Analyzing trace with hash -107828201, now seen corresponding path program 1 times [2023-12-02 19:13:03,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:13:03,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385052983] [2023-12-02 19:13:03,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:03,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:13:03,997 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:13:03,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1987936792] [2023-12-02 19:13:03,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:03,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:03,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:13:03,999 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:13:04,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 19:13:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:13:04,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 19:13:04,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:13:04,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:13:04,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:13:04,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:13:04,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:13:04,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385052983] [2023-12-02 19:13:04,116 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:13:04,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987936792] [2023-12-02 19:13:04,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987936792] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:13:04,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1100683292] [2023-12-02 19:13:04,119 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 19:13:04,119 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:13:04,120 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:13:04,120 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:13:04,120 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:13:04,416 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-12-02 19:13:04,437 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:13:05,176 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '689#(and (exists ((|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_3| Int)) (and (<= (+ (mod |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_3| 4294967296) 1) (mod |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_3| 4294967296)) (not (= (mod |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_3| 4294967296) (mod |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_3| 4294967296))))) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= 21 ~counter~0))' at error location [2023-12-02 19:13:05,176 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:13:05,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 19:13:05,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-12-02 19:13:05,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194017468] [2023-12-02 19:13:05,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 19:13:05,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 19:13:05,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:13:05,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 19:13:05,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-12-02 19:13:05,179 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:13:05,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:13:05,324 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2023-12-02 19:13:05,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 19:13:05,326 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-02 19:13:05,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:13:05,327 INFO L225 Difference]: With dead ends: 81 [2023-12-02 19:13:05,327 INFO L226 Difference]: Without dead ends: 74 [2023-12-02 19:13:05,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-12-02 19:13:05,329 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 62 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:13:05,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 86 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:13:05,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-12-02 19:13:05,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2023-12-02 19:13:05,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 56 states have internal predecessors, (69), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 19:13:05,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2023-12-02 19:13:05,339 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 13 [2023-12-02 19:13:05,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:13:05,339 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2023-12-02 19:13:05,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:13:05,340 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2023-12-02 19:13:05,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 19:13:05,340 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:13:05,341 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:13:05,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 19:13:05,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:05,542 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:13:05,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:13:05,542 INFO L85 PathProgramCache]: Analyzing trace with hash -106040741, now seen corresponding path program 1 times [2023-12-02 19:13:05,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:13:05,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993091504] [2023-12-02 19:13:05,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:05,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:13:05,553 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:13:05,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29612411] [2023-12-02 19:13:05,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:05,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:05,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:13:05,555 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:13:05,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 19:13:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:13:05,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 19:13:05,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:13:05,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:13:05,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:13:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:13:05,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:13:05,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993091504] [2023-12-02 19:13:05,823 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:13:05,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29612411] [2023-12-02 19:13:05,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29612411] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 19:13:05,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:13:05,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2023-12-02 19:13:05,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495874737] [2023-12-02 19:13:05,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:13:05,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 19:13:05,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:13:05,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 19:13:05,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-12-02 19:13:05,825 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:13:07,872 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 [1] [2023-12-02 19:13:09,900 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 [1] [2023-12-02 19:13:09,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:13:09,915 INFO L93 Difference]: Finished difference Result 107 states and 131 transitions. [2023-12-02 19:13:09,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 19:13:09,916 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-02 19:13:09,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:13:09,917 INFO L225 Difference]: With dead ends: 107 [2023-12-02 19:13:09,917 INFO L226 Difference]: Without dead ends: 105 [2023-12-02 19:13:09,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-12-02 19:13:09,919 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:13:09,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 42 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 2 Unknown, 0 Unchecked, 4.1s Time] [2023-12-02 19:13:09,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-12-02 19:13:09,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2023-12-02 19:13:09,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 82 states have internal predecessors, (92), 13 states have call successors, (13), 9 states have call predecessors, (13), 9 states have return successors, (9), 5 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 19:13:09,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2023-12-02 19:13:09,940 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 13 [2023-12-02 19:13:09,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:13:09,940 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2023-12-02 19:13:09,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:13:09,940 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2023-12-02 19:13:09,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 19:13:09,941 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:13:09,941 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:13:09,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 19:13:10,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:10,145 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:13:10,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:13:10,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1345144360, now seen corresponding path program 1 times [2023-12-02 19:13:10,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:13:10,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891960941] [2023-12-02 19:13:10,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:10,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:13:10,153 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:13:10,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824819427] [2023-12-02 19:13:10,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:10,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:10,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:13:10,154 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:13:10,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 19:13:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:13:10,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 19:13:10,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:13:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:13:10,221 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:13:10,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:13:10,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891960941] [2023-12-02 19:13:10,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:13:10,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824819427] [2023-12-02 19:13:10,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824819427] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:13:10,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:13:10,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:13:10,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75736175] [2023-12-02 19:13:10,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:13:10,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:13:10,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:13:10,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:13:10,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:13:10,224 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 19:13:10,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:13:10,250 INFO L93 Difference]: Finished difference Result 134 states and 158 transitions. [2023-12-02 19:13:10,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:13:10,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-12-02 19:13:10,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:13:10,253 INFO L225 Difference]: With dead ends: 134 [2023-12-02 19:13:10,254 INFO L226 Difference]: Without dead ends: 84 [2023-12-02 19:13:10,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 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 19:13:10,255 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:13:10,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:13:10,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-12-02 19:13:10,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-12-02 19:13:10,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 71 states have internal predecessors, (81), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 19:13:10,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 99 transitions. [2023-12-02 19:13:10,273 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 99 transitions. Word has length 18 [2023-12-02 19:13:10,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:13:10,273 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 99 transitions. [2023-12-02 19:13:10,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 19:13:10,274 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 99 transitions. [2023-12-02 19:13:10,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 19:13:10,275 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:13:10,275 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:13:10,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 19:13:10,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:10,480 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:13:10,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:13:10,481 INFO L85 PathProgramCache]: Analyzing trace with hash 828862099, now seen corresponding path program 1 times [2023-12-02 19:13:10,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:13:10,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650889887] [2023-12-02 19:13:10,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:10,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:13:10,491 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:13:10,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [661114098] [2023-12-02 19:13:10,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:10,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:10,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:13:10,493 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:13:10,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 19:13:10,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:13:10,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 19:13:10,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:13:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 19:13:10,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:13:10,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 19:13:10,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:13:10,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650889887] [2023-12-02 19:13:10,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:13:10,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661114098] [2023-12-02 19:13:10,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661114098] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:13:10,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [421667756] [2023-12-02 19:13:10,645 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 19:13:10,645 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:13:10,645 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:13:10,645 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:13:10,646 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:13:10,903 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2023-12-02 19:13:10,986 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:13:11,864 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1756#(and (<= 2 ~counter~0) (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_10| Int)) (and (not (= (mod |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_10| 4294967296) (mod |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_10| 4294967296))) (<= (+ (mod |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_10| 4294967296) 1) (mod |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_11| 4294967296)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~counter~0 20))' at error location [2023-12-02 19:13:11,865 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:13:11,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 19:13:11,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2023-12-02 19:13:11,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937160708] [2023-12-02 19:13:11,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 19:13:11,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 19:13:11,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:13:11,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 19:13:11,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-12-02 19:13:11,867 INFO L87 Difference]: Start difference. First operand 84 states and 99 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 19:13:12,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:13:12,530 INFO L93 Difference]: Finished difference Result 99 states and 113 transitions. [2023-12-02 19:13:12,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 19:13:12,531 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-12-02 19:13:12,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:13:12,532 INFO L225 Difference]: With dead ends: 99 [2023-12-02 19:13:12,532 INFO L226 Difference]: Without dead ends: 79 [2023-12-02 19:13:12,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2023-12-02 19:13:12,534 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 19:13:12,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 56 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 19:13:12,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-12-02 19:13:12,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-12-02 19:13:12,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 63 states have (on average 1.1904761904761905) internal successors, (75), 67 states have internal predecessors, (75), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 19:13:12,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2023-12-02 19:13:12,547 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 19 [2023-12-02 19:13:12,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:13:12,548 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2023-12-02 19:13:12,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 19:13:12,548 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2023-12-02 19:13:12,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 19:13:12,549 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:13:12,549 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:13:12,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 19:13:12,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:12,758 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:13:12,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:13:12,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1577774082, now seen corresponding path program 1 times [2023-12-02 19:13:12,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:13:12,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927260789] [2023-12-02 19:13:12,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:12,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:13:12,767 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:13:12,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [754606797] [2023-12-02 19:13:12,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:12,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:12,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:13:12,768 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:13:12,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 19:13:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:13:12,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 19:13:12,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:13:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:13:12,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:13:16,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:13:16,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:13:16,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927260789] [2023-12-02 19:13:16,862 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:13:16,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754606797] [2023-12-02 19:13:16,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754606797] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:13:16,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [701357319] [2023-12-02 19:13:16,864 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 19:13:16,864 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:13:16,865 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:13:16,865 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:13:16,865 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:13:17,587 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-12-02 19:13:17,615 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:13:30,021 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2152#(and (<= 2 ~counter~0) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~counter~0 20) (exists ((|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_22| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_23| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_22| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_22| Int)) (not (= (mod |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_22| 4294967296) (mod (+ (* |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_23| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_22|) |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_22|) 4294967296)))))' at error location [2023-12-02 19:13:30,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:13:30,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 19:13:30,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-12-02 19:13:30,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018782485] [2023-12-02 19:13:30,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 19:13:30,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 19:13:30,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:13:30,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 19:13:30,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=522, Unknown=1, NotChecked=0, Total=600 [2023-12-02 19:13:30,024 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 19:13:40,286 WARN L293 SmtUtils]: Spent 7.36s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:13:42,296 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 19:13:44,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:13:46,313 WARN L539 Checker$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 19:13:58,389 WARN L293 SmtUtils]: Spent 9.21s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:14:00,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:14:02,859 WARN L539 Checker$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 19:14:09,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:14:11,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:14:13,522 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 19:14:13,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:14:13,523 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2023-12-02 19:14:13,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 19:14:13,526 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-12-02 19:14:13,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:14:13,528 INFO L225 Difference]: With dead ends: 106 [2023-12-02 19:14:13,528 INFO L226 Difference]: Without dead ends: 104 [2023-12-02 19:14:13,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=111, Invalid=699, Unknown=2, NotChecked=0, Total=812 [2023-12-02 19:14:13,529 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 16 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:14:13,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 162 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 93 Invalid, 7 Unknown, 0 Unchecked, 18.2s Time] [2023-12-02 19:14:13,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-12-02 19:14:13,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 88. [2023-12-02 19:14:13,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 73 states have internal predecessors, (81), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 19:14:13,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2023-12-02 19:14:13,554 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 21 [2023-12-02 19:14:13,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:14:13,555 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2023-12-02 19:14:13,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 19:14:13,555 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2023-12-02 19:14:13,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 19:14:13,556 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:14:13,556 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:14:13,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-02 19:14:13,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 19:14:13,757 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:14:13,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:14:13,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1116114138, now seen corresponding path program 2 times [2023-12-02 19:14:13,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:14:13,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234178919] [2023-12-02 19:14:13,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:14:13,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:14:13,768 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:14:13,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707004874] [2023-12-02 19:14:13,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:14:13,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:14:13,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:14:13,769 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:14:13,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 19:14:13,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-12-02 19:14:13,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:14:13,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 19:14:13,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:14:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 19:14:13,879 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:14:13,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:14:13,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234178919] [2023-12-02 19:14:13,880 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:14:13,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707004874] [2023-12-02 19:14:13,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707004874] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:14:13,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:14:13,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 19:14:13,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819592869] [2023-12-02 19:14:13,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:14:13,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:14:13,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:14:13,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:14:13,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:14:13,881 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:14:13,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:14:13,997 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2023-12-02 19:14:13,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:14:13,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-12-02 19:14:13,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:14:13,999 INFO L225 Difference]: With dead ends: 103 [2023-12-02 19:14:13,999 INFO L226 Difference]: Without dead ends: 96 [2023-12-02 19:14:13,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:14:14,000 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:14:14,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 40 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:14:14,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-12-02 19:14:14,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 83. [2023-12-02 19:14:14,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.123076923076923) internal successors, (73), 68 states have internal predecessors, (73), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 19:14:14,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2023-12-02 19:14:14,014 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 24 [2023-12-02 19:14:14,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:14:14,014 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2023-12-02 19:14:14,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:14:14,014 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2023-12-02 19:14:14,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 19:14:14,015 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:14:14,015 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-12-02 19:14:14,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 19:14:14,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:14:14,216 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:14:14,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:14:14,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1293804193, now seen corresponding path program 2 times [2023-12-02 19:14:14,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:14:14,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698261864] [2023-12-02 19:14:14,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:14:14,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:14:14,223 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:14:14,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1923177424] [2023-12-02 19:14:14,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:14:14,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:14:14,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:14:14,225 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:14:14,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 19:14:15,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 19:14:15,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:14:15,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 19:14:15,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:14:15,884 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 19:14:15,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:14:16,054 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 19:14:16,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:14:16,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698261864] [2023-12-02 19:14:16,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:14:16,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923177424] [2023-12-02 19:14:16,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923177424] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:14:16,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [491710192] [2023-12-02 19:14:16,057 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 19:14:16,057 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:14:16,057 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:14:16,057 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:14:16,058 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:14:16,860 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-12-02 19:14:16,879 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:14:22,292 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2946#(and (<= 2 ~counter~0) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~counter~0 20) (exists ((|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_37| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_32| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_32| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_32| Int)) (not (= (mod |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_32| 4294967296) (mod (+ (* |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_37| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_32|) |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_32|) 4294967296)))))' at error location [2023-12-02 19:14:22,292 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:14:22,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 19:14:22,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2023-12-02 19:14:22,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555481508] [2023-12-02 19:14:22,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 19:14:22,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 19:14:22,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:14:22,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 19:14:22,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2023-12-02 19:14:22,294 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 19:14:22,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:14:22,419 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2023-12-02 19:14:22,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:14:22,419 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2023-12-02 19:14:22,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:14:22,420 INFO L225 Difference]: With dead ends: 97 [2023-12-02 19:14:22,420 INFO L226 Difference]: Without dead ends: 60 [2023-12-02 19:14:22,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2023-12-02 19:14:22,421 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:14:22,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 96 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:14:22,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-02 19:14:22,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-12-02 19:14:22,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 19:14:22,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2023-12-02 19:14:22,433 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 29 [2023-12-02 19:14:22,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:14:22,433 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2023-12-02 19:14:22,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 19:14:22,433 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2023-12-02 19:14:22,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 19:14:22,434 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:14:22,434 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:14:22,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 19:14:22,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:14:22,635 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:14:22,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:14:22,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1236941473, now seen corresponding path program 1 times [2023-12-02 19:14:22,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:14:22,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044440578] [2023-12-02 19:14:22,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:14:22,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:14:22,647 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:14:22,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105621947] [2023-12-02 19:14:22,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:14:22,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:14:22,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:14:22,649 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:14:22,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 19:14:22,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:14:22,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 19:14:22,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:14:22,734 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 19:14:22,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:14:22,801 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 19:14:22,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:14:22,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044440578] [2023-12-02 19:14:22,801 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:14:22,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105621947] [2023-12-02 19:14:22,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105621947] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:14:22,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1311561924] [2023-12-02 19:14:22,803 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 19:14:22,803 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:14:22,803 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:14:22,803 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:14:22,803 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:14:23,378 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 19:14:23,381 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:14:29,640 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3354#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 19:14:29,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:14:29,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 19:14:29,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-12-02 19:14:29,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959900528] [2023-12-02 19:14:29,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 19:14:29,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 19:14:29,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:14:29,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 19:14:29,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2023-12-02 19:14:29,642 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 19:14:29,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:14:29,900 INFO L93 Difference]: Finished difference Result 166 states and 186 transitions. [2023-12-02 19:14:29,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 19:14:29,901 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-12-02 19:14:29,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:14:29,902 INFO L225 Difference]: With dead ends: 166 [2023-12-02 19:14:29,903 INFO L226 Difference]: Without dead ends: 148 [2023-12-02 19:14:29,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=212, Invalid=910, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 19:14:29,904 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 104 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:14:29,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 126 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:14:29,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-12-02 19:14:29,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 77. [2023-12-02 19:14:29,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 67 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 19:14:29,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2023-12-02 19:14:29,922 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 29 [2023-12-02 19:14:29,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:14:29,922 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2023-12-02 19:14:29,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 19:14:29,923 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2023-12-02 19:14:29,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 19:14:29,924 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:14:29,924 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:14:29,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 19:14:30,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:14:30,125 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:14:30,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:14:30,125 INFO L85 PathProgramCache]: Analyzing trace with hash 2110201956, now seen corresponding path program 1 times [2023-12-02 19:14:30,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:14:30,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627325424] [2023-12-02 19:14:30,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:14:30,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:14:30,133 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:14:30,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1861893225] [2023-12-02 19:14:30,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:14:30,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:14:30,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:14:30,134 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:14:30,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 19:14:30,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:14:30,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 19:14:30,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:14:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:14:30,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:14:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:14:30,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:14:30,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627325424] [2023-12-02 19:14:30,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:14:30,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861893225] [2023-12-02 19:14:30,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861893225] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:14:30,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1647778412] [2023-12-02 19:14:30,350 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 19:14:30,350 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:14:30,350 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:14:30,351 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:14:30,351 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:14:30,921 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 19:14:30,924 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:14:41,925 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3909#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 19:14:41,925 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:14:41,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 19:14:41,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-12-02 19:14:41,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441705706] [2023-12-02 19:14:41,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 19:14:41,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 19:14:41,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:14:41,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 19:14:41,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=660, Unknown=1, NotChecked=0, Total=812 [2023-12-02 19:14:41,927 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 19:14:42,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:14:42,253 INFO L93 Difference]: Finished difference Result 233 states and 257 transitions. [2023-12-02 19:14:42,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-02 19:14:42,253 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2023-12-02 19:14:42,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:14:42,255 INFO L225 Difference]: With dead ends: 233 [2023-12-02 19:14:42,255 INFO L226 Difference]: Without dead ends: 226 [2023-12-02 19:14:42,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=285, Invalid=1196, Unknown=1, NotChecked=0, Total=1482 [2023-12-02 19:14:42,257 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 157 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:14:42,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 160 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:14:42,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-12-02 19:14:42,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 204. [2023-12-02 19:14:42,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 160 states have (on average 1.15) internal successors, (184), 170 states have internal predecessors, (184), 22 states have call successors, (22), 21 states have call predecessors, (22), 21 states have return successors, (21), 12 states have call predecessors, (21), 21 states have call successors, (21) [2023-12-02 19:14:42,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 227 transitions. [2023-12-02 19:14:42,298 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 227 transitions. Word has length 30 [2023-12-02 19:14:42,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:14:42,299 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 227 transitions. [2023-12-02 19:14:42,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 19:14:42,299 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 227 transitions. [2023-12-02 19:14:42,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 19:14:42,300 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:14:42,300 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:14:42,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 19:14:42,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:14:42,500 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:14:42,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:14:42,501 INFO L85 PathProgramCache]: Analyzing trace with hash 2111989416, now seen corresponding path program 3 times [2023-12-02 19:14:42,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:14:42,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575554031] [2023-12-02 19:14:42,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:14:42,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:14:42,509 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:14:42,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [381427490] [2023-12-02 19:14:42,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 19:14:42,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:14:42,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:14:42,510 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:14:42,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 19:14:42,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 19:14:42,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:14:42,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-02 19:14:42,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:14:42,842 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:14:42,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:15:05,542 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:15:05,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:15:05,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575554031] [2023-12-02 19:15:05,542 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:15:05,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381427490] [2023-12-02 19:15:05,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381427490] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:15:05,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [36577423] [2023-12-02 19:15:05,544 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 19:15:05,544 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:15:05,544 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:15:05,545 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:15:05,545 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:15:06,292 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-12-02 19:15:06,309 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:15:18,308 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4732#(and (<= 2 ~counter~0) (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_69| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_64| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_64| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_64| Int)) (not (= (mod (+ |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_64| (* |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_64|)) 4294967296) (mod |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_64| 4294967296)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~counter~0 20))' at error location [2023-12-02 19:15:18,308 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:15:18,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 19:15:18,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2023-12-02 19:15:18,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030359156] [2023-12-02 19:15:18,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 19:15:18,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 19:15:18,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:15:18,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 19:15:18,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=804, Unknown=2, NotChecked=0, Total=930 [2023-12-02 19:15:18,311 INFO L87 Difference]: Start difference. First operand 204 states and 227 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 18 states have internal predecessors, (50), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 19:16:10,129 WARN L293 SmtUtils]: Spent 42.28s on a formula simplification that was a NOOP. DAG size: 92 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:16:18,594 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 19:16:20,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:16:22,612 WARN L539 Checker$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 19:16:50,998 WARN L293 SmtUtils]: Spent 16.57s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:16:53,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:16:54,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:16:57,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:16:59,198 WARN L539 Checker$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 19:17:02,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:17:04,128 WARN L539 Checker$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 19:17:06,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:17:08,144 WARN L539 Checker$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 19:17:18,060 WARN L293 SmtUtils]: Spent 7.26s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:17:20,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:18:03,935 WARN L293 SmtUtils]: Spent 38.34s on a formula simplification that was a NOOP. DAG size: 88 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:18:05,963 WARN L539 Checker$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 19:18:07,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:18:09,973 WARN L539 Checker$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 19:18:11,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:18:13,982 WARN L539 Checker$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 19:18:18,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:18:56,414 WARN L293 SmtUtils]: Spent 26.08s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:18:58,421 WARN L539 Checker$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 19:19:00,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:19:03,439 WARN L539 Checker$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 19:19:05,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:19:07,058 WARN L539 Checker$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 19:19:09,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:19:11,043 WARN L539 Checker$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 19:19:13,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:19:16,643 WARN L539 Checker$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 19:19:18,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:19:20,716 WARN L539 Checker$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 19:19:45,158 WARN L293 SmtUtils]: Spent 20.61s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:19:47,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:19:48,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:19:51,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:20:02,785 WARN L293 SmtUtils]: Spent 6.81s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:20:05,043 WARN L539 Checker$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 19:20:07,052 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 19:20:08,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:20:08,074 INFO L93 Difference]: Finished difference Result 284 states and 318 transitions. [2023-12-02 19:20:08,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-02 19:20:08,079 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 18 states have internal predecessors, (50), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2023-12-02 19:20:08,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:20:08,081 INFO L225 Difference]: With dead ends: 284 [2023-12-02 19:20:08,081 INFO L226 Difference]: Without dead ends: 282 [2023-12-02 19:20:08,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 236.9s TimeCoverageRelationStatistics Valid=271, Invalid=1355, Unknown=14, NotChecked=0, Total=1640 [2023-12-02 19:20:08,083 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 70 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 46 mSolverCounterUnsat, 29 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 29 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:20:08,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 256 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 191 Invalid, 29 Unknown, 0 Unchecked, 77.1s Time] [2023-12-02 19:20:08,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2023-12-02 19:20:08,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 256. [2023-12-02 19:20:08,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 199 states have (on average 1.1155778894472361) internal successors, (222), 209 states have internal predecessors, (222), 30 states have call successors, (30), 26 states have call predecessors, (30), 26 states have return successors, (29), 20 states have call predecessors, (29), 29 states have call successors, (29) [2023-12-02 19:20:08,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 281 transitions. [2023-12-02 19:20:08,153 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 281 transitions. Word has length 30 [2023-12-02 19:20:08,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:20:08,153 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 281 transitions. [2023-12-02 19:20:08,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 18 states have internal predecessors, (50), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 19:20:08,153 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 281 transitions. [2023-12-02 19:20:08,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 19:20:08,155 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:20:08,155 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2023-12-02 19:20:08,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 19:20:08,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 19:20:08,355 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:20:08,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:20:08,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1242061650, now seen corresponding path program 4 times [2023-12-02 19:20:08,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:20:08,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336601711] [2023-12-02 19:20:08,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:20:08,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:20:08,365 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:20:08,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [231023257] [2023-12-02 19:20:08,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 19:20:08,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:20:08,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:20:08,367 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:20:08,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 19:20:08,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:20:08,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 19:20:08,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:20:08,609 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 19:20:08,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:20:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 19:20:09,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:20:09,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336601711] [2023-12-02 19:20:09,798 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:20:09,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231023257] [2023-12-02 19:20:09,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231023257] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:20:09,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1047848385] [2023-12-02 19:20:09,799 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 19:20:09,800 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:20:09,800 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:20:09,800 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:20:09,800 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:20:10,388 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-12-02 19:20:10,406 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:20:18,264 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5757#(and (<= 2 ~counter~0) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_73| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_73| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_73| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_84| Int)) (not (= (mod (+ (* |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_84| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_73|) |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_73|) 4294967296) (mod |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_73| 4294967296)))) (= __VERIFIER_assert_~cond 0) (<= ~counter~0 20))' at error location [2023-12-02 19:20:18,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:20:18,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 19:20:18,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2023-12-02 19:20:18,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784018466] [2023-12-02 19:20:18,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 19:20:18,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 19:20:18,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:20:18,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 19:20:18,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2023-12-02 19:20:18,266 INFO L87 Difference]: Start difference. First operand 256 states and 281 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 19:20:18,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:20:18,826 INFO L93 Difference]: Finished difference Result 331 states and 366 transitions. [2023-12-02 19:20:18,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 19:20:18,827 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2023-12-02 19:20:18,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:20:18,829 INFO L225 Difference]: With dead ends: 331 [2023-12-02 19:20:18,829 INFO L226 Difference]: Without dead ends: 238 [2023-12-02 19:20:18,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2023-12-02 19:20:18,830 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 19:20:18,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 139 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 19:20:18,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-12-02 19:20:18,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 225. [2023-12-02 19:20:18,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 176 states have (on average 1.1193181818181819) internal successors, (197), 185 states have internal predecessors, (197), 26 states have call successors, (26), 22 states have call predecessors, (26), 22 states have return successors, (25), 17 states have call predecessors, (25), 25 states have call successors, (25) [2023-12-02 19:20:18,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 248 transitions. [2023-12-02 19:20:18,895 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 248 transitions. Word has length 40 [2023-12-02 19:20:18,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:20:18,895 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 248 transitions. [2023-12-02 19:20:18,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 19:20:18,895 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 248 transitions. [2023-12-02 19:20:18,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 19:20:18,896 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:20:18,896 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2023-12-02 19:20:18,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 19:20:19,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 19:20:19,097 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:20:19,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:20:19,097 INFO L85 PathProgramCache]: Analyzing trace with hash -104369631, now seen corresponding path program 5 times [2023-12-02 19:20:19,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:20:19,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227981459] [2023-12-02 19:20:19,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:20:19,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:20:19,107 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:20:19,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943722184] [2023-12-02 19:20:19,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:20:19,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:20:19,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:20:19,108 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:20:19,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 19:20:37,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 19:20:37,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:20:37,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 19:20:37,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:21:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 33 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 19:21:22,301 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:21:54,889 WARN L293 SmtUtils]: Spent 10.23s on a formula simplification. DAG size of input: 40 DAG size of output: 37 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:22:52,303 WARN L293 SmtUtils]: Spent 14.47s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:23:34,365 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 19:23:34,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:23:34,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227981459] [2023-12-02 19:23:34,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:23:34,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943722184] [2023-12-02 19:23:34,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943722184] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:23:34,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2023082450] [2023-12-02 19:23:34,367 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 19:23:34,367 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:23:34,367 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:23:34,367 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:23:34,367 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:23:34,977 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-12-02 19:23:34,999 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:24:17,369 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6801#(and (<= 2 ~counter~0) (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_87| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_87| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_98| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_87| Int)) (not (= (mod |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_87| 4294967296) (mod (+ (* |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_98| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_87|) |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_87|) 4294967296)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~counter~0 20))' at error location [2023-12-02 19:24:17,369 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:24:17,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 19:24:17,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2023-12-02 19:24:17,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119128731] [2023-12-02 19:24:17,369 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 19:24:17,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 19:24:17,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:24:17,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 19:24:17,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=799, Unknown=13, NotChecked=0, Total=930 [2023-12-02 19:24:17,371 INFO L87 Difference]: Start difference. First operand 225 states and 248 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 18 states have internal predecessors, (51), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 19:24:20,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:24:27,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:24:29,327 WARN L539 Checker$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 19:24:30,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:24:31,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:24:33,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:25:27,116 WARN L293 SmtUtils]: Spent 42.26s on a formula simplification. DAG size of input: 93 DAG size of output: 87 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:25:30,051 WARN L539 Checker$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 19:25:32,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:25:34,847 WARN L539 Checker$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 19:25:36,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:26:02,506 WARN L293 SmtUtils]: Spent 19.19s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:26:05,278 WARN L539 Checker$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 19:26:07,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:26:09,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:26:11,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:26:32,470 WARN L293 SmtUtils]: Spent 15.73s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:26:34,476 WARN L539 Checker$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 19:26:38,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:26:41,757 WARN L539 Checker$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 19:26:43,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:26:45,942 WARN L539 Checker$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 19:26:47,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:26:50,831 WARN L539 Checker$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 19:26:52,841 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 19:26:53,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:26:53,268 INFO L93 Difference]: Finished difference Result 337 states and 378 transitions. [2023-12-02 19:26:53,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 19:26:53,272 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 18 states have internal predecessors, (51), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2023-12-02 19:26:53,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:26:53,273 INFO L225 Difference]: With dead ends: 337 [2023-12-02 19:26:53,273 INFO L226 Difference]: Without dead ends: 331 [2023-12-02 19:26:53,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 202.5s TimeCoverageRelationStatistics Valid=186, Invalid=1200, Unknown=20, NotChecked=0, Total=1406 [2023-12-02 19:26:53,274 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 35 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 21 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:26:53,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 201 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 118 Invalid, 17 Unknown, 0 Unchecked, 52.0s Time] [2023-12-02 19:26:53,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-12-02 19:26:53,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 270. [2023-12-02 19:26:53,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 209 states have (on average 1.0909090909090908) internal successors, (228), 218 states have internal predecessors, (228), 33 states have call successors, (33), 27 states have call predecessors, (33), 27 states have return successors, (32), 24 states have call predecessors, (32), 32 states have call successors, (32) [2023-12-02 19:26:53,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 293 transitions. [2023-12-02 19:26:53,362 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 293 transitions. Word has length 41 [2023-12-02 19:26:53,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:26:53,362 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 293 transitions. [2023-12-02 19:26:53,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 18 states have internal predecessors, (51), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 19:26:53,363 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 293 transitions. [2023-12-02 19:26:53,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 19:26:53,363 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:26:53,364 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2023-12-02 19:26:53,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 19:26:53,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 19:26:53,564 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:26:53,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:26:53,565 INFO L85 PathProgramCache]: Analyzing trace with hash 632147460, now seen corresponding path program 6 times [2023-12-02 19:26:53,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:26:53,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143552333] [2023-12-02 19:26:53,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:26:53,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:26:53,572 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:26:53,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1952487785] [2023-12-02 19:26:53,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 19:26:53,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:26:53,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:26:53,573 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:26:53,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a1b1ca5-07d7-411c-8c1e-7e5f5d738eb8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 19:26:54,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 19:26:54,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:26:54,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-02 19:26:54,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:26:55,748 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 19:26:55,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:27:18,047 WARN L293 SmtUtils]: Spent 5.52s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)