./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/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_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 20f9ce6814caacb533e5bf2143ac3e067387f11238548a0b9b41e2de8e2cc436 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:02:53,622 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:02:53,686 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-12-02 16:02:53,690 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:02:53,691 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:02:53,712 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:02:53,712 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:02:53,713 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:02:53,713 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:02:53,714 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:02:53,714 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:02:53,715 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:02:53,716 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:02:53,716 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:02:53,717 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:02:53,717 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:02:53,718 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:02:53,718 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:02:53,719 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:02:53,719 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:02:53,720 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:02:53,721 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:02:53,721 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:02:53,722 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:02:53,722 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 16:02:53,723 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:02:53,723 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 16:02:53,724 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:02:53,724 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:02:53,725 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:02:53,725 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:02:53,726 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-12-02 16:02:53,726 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 16:02:53,726 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 16:02:53,726 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:02:53,727 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:02:53,727 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:02:53,727 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:02:53,727 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:02:53,727 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:02:53,728 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:02:53,728 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:02:53,728 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:02:53,728 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:02:53,729 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:02:53,729 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:02:53,729 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:02:53,729 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:02:53,729 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:02:53,729 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_a730710e-531d-4484-a1dd-661bba86c3c6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20f9ce6814caacb533e5bf2143ac3e067387f11238548a0b9b41e2de8e2cc436 [2023-12-02 16:02:53,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:02:53,946 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:02:53,948 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:02:53,949 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:02:53,949 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:02:53,951 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c [2023-12-02 16:02:56,761 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:02:56,944 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:02:56,944 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c [2023-12-02 16:02:56,951 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/data/c32ec8679/51e53a6cd17c450b8dffc47a6846766f/FLAG8ef405e4f [2023-12-02 16:02:56,964 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/data/c32ec8679/51e53a6cd17c450b8dffc47a6846766f [2023-12-02 16:02:56,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:02:56,968 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:02:56,969 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:02:56,970 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:02:56,974 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:02:56,975 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:02:56" (1/1) ... [2023-12-02 16:02:56,976 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@437dc83c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:02:56, skipping insertion in model container [2023-12-02 16:02:56,976 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:02:56" (1/1) ... [2023-12-02 16:02:56,994 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:02:57,133 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:02:57,144 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:02:57,166 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:02:57,177 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:02:57,177 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:02:57 WrapperNode [2023-12-02 16:02:57,177 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:02:57,178 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:02:57,178 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:02:57,178 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:02:57,184 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:02:57" (1/1) ... [2023-12-02 16:02:57,190 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:02:57" (1/1) ... [2023-12-02 16:02:57,216 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 119 [2023-12-02 16:02:57,216 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:02:57,217 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:02:57,217 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:02:57,217 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:02:57,224 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:02:57" (1/1) ... [2023-12-02 16:02:57,224 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:02:57" (1/1) ... [2023-12-02 16:02:57,227 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:02:57" (1/1) ... [2023-12-02 16:02:57,227 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:02:57" (1/1) ... [2023-12-02 16:02:57,231 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:02:57" (1/1) ... [2023-12-02 16:02:57,234 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:02:57" (1/1) ... [2023-12-02 16:02:57,236 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:02:57" (1/1) ... [2023-12-02 16:02:57,237 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:02:57" (1/1) ... [2023-12-02 16:02:57,239 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:02:57,240 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:02:57,240 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:02:57,241 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:02:57,241 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:02:57" (1/1) ... [2023-12-02 16:02:57,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:02:57,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:02:57,267 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:02:57,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:02:57,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:02:57,310 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 16:02:57,311 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 16:02:57,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:02:57,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:02:57,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:02:57,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 16:02:57,311 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 16:02:57,369 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:02:57,371 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:02:57,715 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:02:57,746 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:02:57,747 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 16:02:57,748 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:02:57 BoogieIcfgContainer [2023-12-02 16:02:57,749 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:02:57,751 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:02:57,752 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:02:57,755 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:02:57,755 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:02:56" (1/3) ... [2023-12-02 16:02:57,756 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2151506e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:02:57, skipping insertion in model container [2023-12-02 16:02:57,756 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:02:57" (2/3) ... [2023-12-02 16:02:57,757 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2151506e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:02:57, skipping insertion in model container [2023-12-02 16:02:57,757 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:02:57" (3/3) ... [2023-12-02 16:02:57,758 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound20.c [2023-12-02 16:02:57,776 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:02:57,776 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 56 error locations. [2023-12-02 16:02:57,818 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:02:57,823 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;@44cffa8a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:02:57,824 INFO L358 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2023-12-02 16:02:57,827 INFO L276 IsEmpty]: Start isEmpty. Operand has 135 states, 65 states have (on average 1.9076923076923078) internal successors, (124), 121 states have internal predecessors, (124), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-02 16:02:57,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 16:02:57,833 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:02:57,834 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:02:57,834 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr30ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:02:57,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:02:57,840 INFO L85 PathProgramCache]: Analyzing trace with hash 91879193, now seen corresponding path program 1 times [2023-12-02 16:02:57,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:02:57,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995972491] [2023-12-02 16:02:57,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:02:57,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:02:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:02:58,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:02:58,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:02:58,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995972491] [2023-12-02 16:02:58,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995972491] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:02:58,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:02:58,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:02:58,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767036121] [2023-12-02 16:02:58,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:02:58,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 16:02:58,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:02:58,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 16:02:58,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 16:02:58,090 INFO L87 Difference]: Start difference. First operand has 135 states, 65 states have (on average 1.9076923076923078) internal successors, (124), 121 states have internal predecessors, (124), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 16:02:58,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:02:58,130 INFO L93 Difference]: Finished difference Result 195 states and 208 transitions. [2023-12-02 16:02:58,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 16:02:58,133 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, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 17 [2023-12-02 16:02:58,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:02:58,142 INFO L225 Difference]: With dead ends: 195 [2023-12-02 16:02:58,142 INFO L226 Difference]: Without dead ends: 132 [2023-12-02 16:02:58,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 16:02:58,149 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:02:58,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 141 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:02:58,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-12-02 16:02:58,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-12-02 16:02:58,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 64 states have (on average 1.890625) internal successors, (121), 119 states have internal predecessors, (121), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 16:02:58,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 141 transitions. [2023-12-02 16:02:58,197 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 141 transitions. Word has length 17 [2023-12-02 16:02:58,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:02:58,198 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 141 transitions. [2023-12-02 16:02:58,199 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, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 16:02:58,199 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 141 transitions. [2023-12-02 16:02:58,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 16:02:58,200 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:02:58,200 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:02:58,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 16:02:58,201 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:02:58,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:02:58,202 INFO L85 PathProgramCache]: Analyzing trace with hash 91873195, now seen corresponding path program 1 times [2023-12-02 16:02:58,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:02:58,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919358226] [2023-12-02 16:02:58,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:02:58,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:02:58,220 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:02:58,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900401163] [2023-12-02 16:02:58,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:02:58,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:02:58,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:02:58,223 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:02:58,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 16:02:58,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:02:58,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:02:58,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:02:58,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:02:58,330 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:02:58,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:02:58,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919358226] [2023-12-02 16:02:58,331 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:02:58,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900401163] [2023-12-02 16:02:58,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900401163] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:02:58,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:02:58,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:02:58,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569229248] [2023-12-02 16:02:58,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:02:58,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:02:58,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:02:58,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:02:58,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:02:58,335 INFO L87 Difference]: Start difference. First operand 132 states and 141 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 16:02:58,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:02:58,554 INFO L93 Difference]: Finished difference Result 249 states and 265 transitions. [2023-12-02 16:02:58,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:02:58,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 17 [2023-12-02 16:02:58,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:02:58,558 INFO L225 Difference]: With dead ends: 249 [2023-12-02 16:02:58,558 INFO L226 Difference]: Without dead ends: 247 [2023-12-02 16:02:58,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 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 16:02:58,560 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 107 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:02:58,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 131 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:02:58,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-12-02 16:02:58,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 170. [2023-12-02 16:02:58,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 97 states have (on average 1.8969072164948453) internal successors, (184), 152 states have internal predecessors, (184), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-02 16:02:58,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 214 transitions. [2023-12-02 16:02:58,582 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 214 transitions. Word has length 17 [2023-12-02 16:02:58,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:02:58,582 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 214 transitions. [2023-12-02 16:02:58,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 16:02:58,583 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 214 transitions. [2023-12-02 16:02:58,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 16:02:58,583 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:02:58,583 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:02:58,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 16:02:58,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:02:58,788 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:02:58,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:02:58,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1446898200, now seen corresponding path program 1 times [2023-12-02 16:02:58,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:02:58,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347669581] [2023-12-02 16:02:58,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:02:58,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:02:58,804 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:02:58,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2131336457] [2023-12-02 16:02:58,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:02:58,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:02:58,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:02:58,806 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:02:58,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 16:02:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:02:58,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:02:58,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:02:58,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:02:58,872 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:02:58,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:02:58,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347669581] [2023-12-02 16:02:58,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:02:58,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131336457] [2023-12-02 16:02:58,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131336457] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:02:58,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:02:58,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:02:58,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360619863] [2023-12-02 16:02:58,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:02:58,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:02:58,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:02:58,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:02:58,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:02:58,875 INFO L87 Difference]: Start difference. First operand 170 states and 214 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 16:02:59,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:02:59,064 INFO L93 Difference]: Finished difference Result 247 states and 263 transitions. [2023-12-02 16:02:59,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:02:59,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 18 [2023-12-02 16:02:59,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:02:59,066 INFO L225 Difference]: With dead ends: 247 [2023-12-02 16:02:59,067 INFO L226 Difference]: Without dead ends: 245 [2023-12-02 16:02:59,067 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 16:02:59,068 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 104 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:02:59,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 133 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:02:59,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2023-12-02 16:02:59,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 171. [2023-12-02 16:02:59,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 98 states have (on average 1.8775510204081634) internal successors, (184), 153 states have internal predecessors, (184), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-02 16:02:59,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 214 transitions. [2023-12-02 16:02:59,086 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 214 transitions. Word has length 18 [2023-12-02 16:02:59,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:02:59,087 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 214 transitions. [2023-12-02 16:02:59,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 16:02:59,087 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 214 transitions. [2023-12-02 16:02:59,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 16:02:59,088 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:02:59,088 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:02:59,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 16:02:59,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:02:59,289 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:02:59,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:02:59,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1904171187, now seen corresponding path program 1 times [2023-12-02 16:02:59,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:02:59,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769216239] [2023-12-02 16:02:59,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:02:59,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:02:59,303 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:02:59,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931286844] [2023-12-02 16:02:59,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:02:59,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:02:59,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:02:59,305 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:02:59,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 16:02:59,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:02:59,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:02:59,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:02:59,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:02:59,362 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:02:59,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:02:59,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769216239] [2023-12-02 16:02:59,363 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:02:59,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931286844] [2023-12-02 16:02:59,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931286844] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:02:59,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:02:59,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:02:59,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112435552] [2023-12-02 16:02:59,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:02:59,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:02:59,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:02:59,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:02:59,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:02:59,365 INFO L87 Difference]: Start difference. First operand 171 states and 214 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 16:02:59,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:02:59,503 INFO L93 Difference]: Finished difference Result 288 states and 338 transitions. [2023-12-02 16:02:59,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:02:59,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 19 [2023-12-02 16:02:59,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:02:59,507 INFO L225 Difference]: With dead ends: 288 [2023-12-02 16:02:59,507 INFO L226 Difference]: Without dead ends: 280 [2023-12-02 16:02:59,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 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 16:02:59,508 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 100 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:02:59,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 191 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:02:59,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2023-12-02 16:02:59,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 224. [2023-12-02 16:02:59,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 145 states have (on average 1.813793103448276) internal successors, (263), 200 states have internal predecessors, (263), 21 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-12-02 16:02:59,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 305 transitions. [2023-12-02 16:02:59,528 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 305 transitions. Word has length 19 [2023-12-02 16:02:59,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:02:59,528 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 305 transitions. [2023-12-02 16:02:59,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 16:02:59,529 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 305 transitions. [2023-12-02 16:02:59,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 16:02:59,529 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:02:59,529 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:02:59,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 16:02:59,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:02:59,732 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:02:59,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:02:59,732 INFO L85 PathProgramCache]: Analyzing trace with hash -252440849, now seen corresponding path program 1 times [2023-12-02 16:02:59,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:02:59,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954967512] [2023-12-02 16:02:59,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:02:59,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:02:59,744 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:02:59,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367685814] [2023-12-02 16:02:59,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:02:59,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:02:59,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:02:59,746 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:02:59,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 16:02:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:02:59,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 16:02:59,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:02:59,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:02:59,849 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:02:59,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:02:59,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954967512] [2023-12-02 16:02:59,849 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:02:59,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367685814] [2023-12-02 16:02:59,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367685814] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:02:59,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:02:59,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:02:59,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41028043] [2023-12-02 16:02:59,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:02:59,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:02:59,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:02:59,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:02:59,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:02:59,851 INFO L87 Difference]: Start difference. First operand 224 states and 305 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 16:03:00,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:00,046 INFO L93 Difference]: Finished difference Result 280 states and 324 transitions. [2023-12-02 16:03:00,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:03:00,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 21 [2023-12-02 16:03:00,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:00,049 INFO L225 Difference]: With dead ends: 280 [2023-12-02 16:03:00,049 INFO L226 Difference]: Without dead ends: 273 [2023-12-02 16:03:00,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 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 16:03:00,050 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 90 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:00,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 112 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:03:00,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-12-02 16:03:00,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 228. [2023-12-02 16:03:00,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 149 states have (on average 1.7651006711409396) internal successors, (263), 204 states have internal predecessors, (263), 21 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-12-02 16:03:00,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 305 transitions. [2023-12-02 16:03:00,066 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 305 transitions. Word has length 21 [2023-12-02 16:03:00,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:00,067 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 305 transitions. [2023-12-02 16:03:00,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 16:03:00,067 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 305 transitions. [2023-12-02 16:03:00,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 16:03:00,068 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:00,068 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:00,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 16:03:00,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:00,274 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:03:00,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:00,274 INFO L85 PathProgramCache]: Analyzing trace with hash 764268332, now seen corresponding path program 1 times [2023-12-02 16:03:00,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:00,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84146388] [2023-12-02 16:03:00,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:00,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:00,286 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:03:00,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [382945721] [2023-12-02 16:03:00,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:00,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:00,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:03:00,288 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:03:00,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 16:03:00,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:00,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:03:00,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:03:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:03:00,363 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:03:00,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:00,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84146388] [2023-12-02 16:03:00,364 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:03:00,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382945721] [2023-12-02 16:03:00,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382945721] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:03:00,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:03:00,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:03:00,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387103514] [2023-12-02 16:03:00,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:03:00,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:03:00,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:00,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:03:00,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:03:00,366 INFO L87 Difference]: Start difference. First operand 228 states and 305 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 16:03:00,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:00,853 INFO L93 Difference]: Finished difference Result 273 states and 316 transitions. [2023-12-02 16:03:00,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:03:00,853 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 22 [2023-12-02 16:03:00,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:00,855 INFO L225 Difference]: With dead ends: 273 [2023-12-02 16:03:00,855 INFO L226 Difference]: Without dead ends: 268 [2023-12-02 16:03:00,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:03:00,857 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 171 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:00,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 161 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 16:03:00,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2023-12-02 16:03:00,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 189. [2023-12-02 16:03:00,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 115 states have (on average 1.7565217391304349) internal successors, (202), 170 states have internal predecessors, (202), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-12-02 16:03:00,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 234 transitions. [2023-12-02 16:03:00,868 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 234 transitions. Word has length 22 [2023-12-02 16:03:00,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:00,869 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 234 transitions. [2023-12-02 16:03:00,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 16:03:00,869 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 234 transitions. [2023-12-02 16:03:00,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 16:03:00,870 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:00,870 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:00,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-02 16:03:01,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:01,071 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:03:01,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:01,071 INFO L85 PathProgramCache]: Analyzing trace with hash 115258569, now seen corresponding path program 1 times [2023-12-02 16:03:01,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:01,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151026767] [2023-12-02 16:03:01,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:01,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:01,082 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:03:01,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [403527040] [2023-12-02 16:03:01,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:01,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:01,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:03:01,084 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:03:01,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 16:03:01,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:01,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 16:03:01,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:03:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:03:01,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:03:01,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 16:03:01,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:01,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151026767] [2023-12-02 16:03:01,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:03:01,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403527040] [2023-12-02 16:03:01,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403527040] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 16:03:01,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:03:01,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-12-02 16:03:01,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813607251] [2023-12-02 16:03:01,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:03:01,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:03:01,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:01,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:03:01,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:03:01,461 INFO L87 Difference]: Start difference. First operand 189 states and 234 transitions. Second operand has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:03:05,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:05,702 INFO L93 Difference]: Finished difference Result 214 states and 262 transitions. [2023-12-02 16:03:05,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:03:05,703 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 26 [2023-12-02 16:03:05,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:05,705 INFO L225 Difference]: With dead ends: 214 [2023-12-02 16:03:05,705 INFO L226 Difference]: Without dead ends: 212 [2023-12-02 16:03:05,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-12-02 16:03:05,706 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 236 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 14 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:05,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 153 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 169 Invalid, 6 Unknown, 0 Unchecked, 4.2s Time] [2023-12-02 16:03:05,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-12-02 16:03:05,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 206. [2023-12-02 16:03:05,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 131 states have (on average 1.6946564885496183) internal successors, (222), 185 states have internal predecessors, (222), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-12-02 16:03:05,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 258 transitions. [2023-12-02 16:03:05,724 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 258 transitions. Word has length 26 [2023-12-02 16:03:05,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:05,724 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 258 transitions. [2023-12-02 16:03:05,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:03:05,724 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 258 transitions. [2023-12-02 16:03:05,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 16:03:05,725 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:05,726 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:05,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 16:03:05,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:05,928 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:03:05,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:05,928 INFO L85 PathProgramCache]: Analyzing trace with hash -721951593, now seen corresponding path program 1 times [2023-12-02 16:03:05,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:05,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393654982] [2023-12-02 16:03:05,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:05,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:05,938 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:03:05,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [766402590] [2023-12-02 16:03:05,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:05,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:05,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:03:05,939 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:03:05,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 16:03:05,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:05,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 16:03:05,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:03:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:03:06,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:03:06,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 16:03:06,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:06,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393654982] [2023-12-02 16:03:06,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:03:06,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766402590] [2023-12-02 16:03:06,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766402590] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 16:03:06,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:03:06,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-12-02 16:03:06,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491974120] [2023-12-02 16:03:06,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:03:06,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:03:06,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:06,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:03:06,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:03:06,337 INFO L87 Difference]: Start difference. First operand 206 states and 258 transitions. Second operand has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:03:07,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:07,925 INFO L93 Difference]: Finished difference Result 215 states and 262 transitions. [2023-12-02 16:03:07,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:03:07,925 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 27 [2023-12-02 16:03:07,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:07,927 INFO L225 Difference]: With dead ends: 215 [2023-12-02 16:03:07,927 INFO L226 Difference]: Without dead ends: 213 [2023-12-02 16:03:07,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-12-02 16:03:07,928 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 233 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:07,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 153 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-02 16:03:07,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-12-02 16:03:07,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 207. [2023-12-02 16:03:07,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 133 states have (on average 1.669172932330827) internal successors, (222), 186 states have internal predecessors, (222), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-12-02 16:03:07,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 258 transitions. [2023-12-02 16:03:07,946 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 258 transitions. Word has length 27 [2023-12-02 16:03:07,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:07,947 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 258 transitions. [2023-12-02 16:03:07,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:03:07,947 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 258 transitions. [2023-12-02 16:03:07,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 16:03:07,948 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:07,948 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:07,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 16:03:08,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:08,148 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:03:08,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:08,149 INFO L85 PathProgramCache]: Analyzing trace with hash -905662837, now seen corresponding path program 1 times [2023-12-02 16:03:08,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:08,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242555185] [2023-12-02 16:03:08,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:08,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:08,158 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:03:08,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [254091527] [2023-12-02 16:03:08,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:08,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:08,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:03:08,159 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:03:08,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 16:03:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:08,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 16:03:08,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:03:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 16:03:08,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:03:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 16:03:08,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:08,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242555185] [2023-12-02 16:03:08,492 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:03:08,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254091527] [2023-12-02 16:03:08,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254091527] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:03:08,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1296951030] [2023-12-02 16:03:08,512 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 16:03:08,512 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:03:08,516 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:03:08,521 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:03:08,521 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:03:09,064 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-12-02 16:03:09,069 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 16:03:09,070 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:03:09,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1296951030] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:03:09,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 16:03:09,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [5, 4] total 18 [2023-12-02 16:03:09,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598753539] [2023-12-02 16:03:09,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:03:09,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 16:03:09,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:09,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 16:03:09,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2023-12-02 16:03:09,741 INFO L87 Difference]: Start difference. First operand 207 states and 258 transitions. Second operand has 13 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 16:03:11,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:11,149 INFO L93 Difference]: Finished difference Result 282 states and 338 transitions. [2023-12-02 16:03:11,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 16:03:11,150 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 28 [2023-12-02 16:03:11,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:11,152 INFO L225 Difference]: With dead ends: 282 [2023-12-02 16:03:11,152 INFO L226 Difference]: Without dead ends: 227 [2023-12-02 16:03:11,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2023-12-02 16:03:11,153 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 158 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:11,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 163 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 16:03:11,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-12-02 16:03:11,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2023-12-02 16:03:11,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 150 states have (on average 1.6) internal successors, (240), 203 states have internal predecessors, (240), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-12-02 16:03:11,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 280 transitions. [2023-12-02 16:03:11,178 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 280 transitions. Word has length 28 [2023-12-02 16:03:11,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:11,179 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 280 transitions. [2023-12-02 16:03:11,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 16:03:11,179 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 280 transitions. [2023-12-02 16:03:11,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-02 16:03:11,180 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:11,180 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:11,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 16:03:11,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:11,384 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:03:11,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:11,384 INFO L85 PathProgramCache]: Analyzing trace with hash -280292058, now seen corresponding path program 1 times [2023-12-02 16:03:11,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:11,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066645629] [2023-12-02 16:03:11,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:11,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:11,395 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:03:11,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [390618697] [2023-12-02 16:03:11,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:11,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:11,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:03:11,397 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:03:11,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 16:03:11,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:11,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:03:11,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:03:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 16:03:11,540 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:03:11,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:11,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066645629] [2023-12-02 16:03:11,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:03:11,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390618697] [2023-12-02 16:03:11,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390618697] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:03:11,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:03:11,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:03:11,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808139131] [2023-12-02 16:03:11,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:03:11,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:03:11,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:11,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:03:11,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:03:11,543 INFO L87 Difference]: Start difference. First operand 227 states and 280 transitions. Second operand has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:03:11,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:11,927 INFO L93 Difference]: Finished difference Result 265 states and 291 transitions. [2023-12-02 16:03:11,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:03:11,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2023-12-02 16:03:11,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:11,929 INFO L225 Difference]: With dead ends: 265 [2023-12-02 16:03:11,929 INFO L226 Difference]: Without dead ends: 263 [2023-12-02 16:03:11,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 46 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 16:03:11,930 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 63 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:11,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 157 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:03:11,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2023-12-02 16:03:11,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 227. [2023-12-02 16:03:11,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 150 states have (on average 1.5866666666666667) internal successors, (238), 203 states have internal predecessors, (238), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-12-02 16:03:11,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 278 transitions. [2023-12-02 16:03:11,962 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 278 transitions. Word has length 48 [2023-12-02 16:03:11,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:11,963 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 278 transitions. [2023-12-02 16:03:11,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:03:11,963 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 278 transitions. [2023-12-02 16:03:11,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-02 16:03:11,964 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:11,964 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:11,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 16:03:12,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:12,165 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:03:12,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:12,165 INFO L85 PathProgramCache]: Analyzing trace with hash 808107240, now seen corresponding path program 1 times [2023-12-02 16:03:12,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:12,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813088769] [2023-12-02 16:03:12,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:12,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:12,173 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:03:12,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124067329] [2023-12-02 16:03:12,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:12,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:12,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:03:12,174 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:03:12,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 16:03:12,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:12,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:03:12,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:03:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 16:03:12,307 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:03:12,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:12,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813088769] [2023-12-02 16:03:12,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:03:12,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124067329] [2023-12-02 16:03:12,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124067329] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:03:12,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:03:12,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:03:12,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829939193] [2023-12-02 16:03:12,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:03:12,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:03:12,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:12,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:03:12,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:03:12,309 INFO L87 Difference]: Start difference. First operand 227 states and 278 transitions. Second operand has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:03:12,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:12,548 INFO L93 Difference]: Finished difference Result 350 states and 410 transitions. [2023-12-02 16:03:12,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:03:12,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2023-12-02 16:03:12,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:12,551 INFO L225 Difference]: With dead ends: 350 [2023-12-02 16:03:12,552 INFO L226 Difference]: Without dead ends: 348 [2023-12-02 16:03:12,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 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 16:03:12,553 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 83 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:12,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 148 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:03:12,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-12-02 16:03:12,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 267. [2023-12-02 16:03:12,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 187 states have (on average 1.6149732620320856) internal successors, (302), 240 states have internal predecessors, (302), 23 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-12-02 16:03:12,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 348 transitions. [2023-12-02 16:03:12,574 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 348 transitions. Word has length 50 [2023-12-02 16:03:12,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:12,575 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 348 transitions. [2023-12-02 16:03:12,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:03:12,575 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 348 transitions. [2023-12-02 16:03:12,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-02 16:03:12,576 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:12,576 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:12,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 16:03:12,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 16:03:12,780 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:03:12,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:12,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1222275624, now seen corresponding path program 1 times [2023-12-02 16:03:12,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:12,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846658948] [2023-12-02 16:03:12,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:12,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:12,789 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:03:12,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2005508841] [2023-12-02 16:03:12,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:12,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:12,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:03:12,791 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:03:12,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 16:03:12,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:12,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:03:12,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:03:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 16:03:12,920 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:03:12,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:12,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846658948] [2023-12-02 16:03:12,921 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:03:12,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005508841] [2023-12-02 16:03:12,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005508841] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:03:12,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:03:12,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:03:12,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212026204] [2023-12-02 16:03:12,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:03:12,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:03:12,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:12,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:03:12,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:03:12,923 INFO L87 Difference]: Start difference. First operand 267 states and 348 transitions. Second operand has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:03:13,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:13,282 INFO L93 Difference]: Finished difference Result 267 states and 348 transitions. [2023-12-02 16:03:13,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:03:13,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2023-12-02 16:03:13,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:13,284 INFO L225 Difference]: With dead ends: 267 [2023-12-02 16:03:13,284 INFO L226 Difference]: Without dead ends: 265 [2023-12-02 16:03:13,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 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 16:03:13,285 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 85 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:13,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 78 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:03:13,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2023-12-02 16:03:13,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2023-12-02 16:03:13,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 187 states have (on average 1.5935828877005347) internal successors, (298), 238 states have internal predecessors, (298), 23 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-12-02 16:03:13,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 344 transitions. [2023-12-02 16:03:13,313 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 344 transitions. Word has length 50 [2023-12-02 16:03:13,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:13,313 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 344 transitions. [2023-12-02 16:03:13,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:03:13,313 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 344 transitions. [2023-12-02 16:03:13,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-02 16:03:13,314 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:13,315 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:13,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 16:03:13,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 16:03:13,520 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:03:13,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:13,520 INFO L85 PathProgramCache]: Analyzing trace with hash 80495922, now seen corresponding path program 1 times [2023-12-02 16:03:13,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:13,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806788562] [2023-12-02 16:03:13,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:13,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:13,531 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:03:13,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799568824] [2023-12-02 16:03:13,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:13,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:13,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:03:13,532 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:03:13,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 16:03:13,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:13,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 16:03:13,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:03:13,749 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 16:03:13,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:03:13,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:13,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806788562] [2023-12-02 16:03:13,829 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:03:13,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799568824] [2023-12-02 16:03:13,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799568824] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:03:13,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1350084876] [2023-12-02 16:03:13,832 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2023-12-02 16:03:13,832 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:03:13,833 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:03:13,833 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:03:13,833 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:03:17,245 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 16:03:17,246 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 16:03:17,247 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:03:18,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1350084876] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:03:18,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:03:18,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [3] total 22 [2023-12-02 16:03:18,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772796970] [2023-12-02 16:03:18,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:03:18,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 16:03:18,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:18,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 16:03:18,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2023-12-02 16:03:18,906 INFO L87 Difference]: Start difference. First operand 265 states and 344 transitions. Second operand has 21 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 16:03:22,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:22,129 INFO L93 Difference]: Finished difference Result 340 states and 399 transitions. [2023-12-02 16:03:22,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 16:03:22,130 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 53 [2023-12-02 16:03:22,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:22,131 INFO L225 Difference]: With dead ends: 340 [2023-12-02 16:03:22,131 INFO L226 Difference]: Without dead ends: 265 [2023-12-02 16:03:22,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 81 SyntacticMatches, 12 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=304, Invalid=752, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 16:03:22,133 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 749 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:22,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [755 Valid, 162 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1301 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-02 16:03:22,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2023-12-02 16:03:22,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 261. [2023-12-02 16:03:22,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 183 states have (on average 1.4808743169398908) internal successors, (271), 234 states have internal predecessors, (271), 23 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-12-02 16:03:22,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 317 transitions. [2023-12-02 16:03:22,152 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 317 transitions. Word has length 53 [2023-12-02 16:03:22,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:22,152 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 317 transitions. [2023-12-02 16:03:22,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 16:03:22,152 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 317 transitions. [2023-12-02 16:03:22,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-02 16:03:22,153 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:22,154 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:22,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 16:03:22,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 16:03:22,356 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:03:22,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:22,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1243105616, now seen corresponding path program 1 times [2023-12-02 16:03:22,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:22,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049946190] [2023-12-02 16:03:22,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:22,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:22,364 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:03:22,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1310486511] [2023-12-02 16:03:22,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:22,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:22,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:03:22,365 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:03:22,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 16:03:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:22,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 16:03:22,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:03:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 16:03:22,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:03:22,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:22,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049946190] [2023-12-02 16:03:22,910 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:03:22,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310486511] [2023-12-02 16:03:22,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310486511] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:03:22,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1584338994] [2023-12-02 16:03:22,913 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2023-12-02 16:03:22,913 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:03:22,913 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:03:22,914 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:03:22,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:03:25,831 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 16:03:25,831 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 16:03:25,832 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:03:27,925 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8765#(and (<= |ULTIMATE.start_main_~b~0#1| 20) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~p~0#1| 1) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= (+ (* |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~y~0#1|) 9223372036854775809) 0) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~q~0#1| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~r~0#1|)) (<= |ULTIMATE.start_main_~a~0#1| 20) (<= |ULTIMATE.start_main_~y~0#1| 20) (<= 0 (+ 35 |ULTIMATE.start_main_~a~0#1|)) (<= |ULTIMATE.start_main_~x~0#1| 20) (= |ULTIMATE.start_main_~s~0#1| 1))' at error location [2023-12-02 16:03:27,925 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:03:27,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:03:27,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-12-02 16:03:27,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405150017] [2023-12-02 16:03:27,925 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 16:03:27,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:03:27,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:27,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:03:27,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2023-12-02 16:03:27,927 INFO L87 Difference]: Start difference. First operand 261 states and 317 transitions. Second operand has 8 states, 6 states have (on average 6.833333333333333) internal successors, (41), 7 states have internal predecessors, (41), 4 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 16:03:28,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:28,855 INFO L93 Difference]: Finished difference Result 438 states and 530 transitions. [2023-12-02 16:03:28,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 16:03:28,856 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 6.833333333333333) internal successors, (41), 7 states have internal predecessors, (41), 4 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 62 [2023-12-02 16:03:28,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:28,859 INFO L225 Difference]: With dead ends: 438 [2023-12-02 16:03:28,859 INFO L226 Difference]: Without dead ends: 437 [2023-12-02 16:03:28,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 99 SyntacticMatches, 17 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2023-12-02 16:03:28,860 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 556 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:28,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 236 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 16:03:28,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2023-12-02 16:03:28,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 271. [2023-12-02 16:03:28,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 192 states have (on average 1.4583333333333333) internal successors, (280), 243 states have internal predecessors, (280), 24 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-12-02 16:03:28,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 328 transitions. [2023-12-02 16:03:28,892 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 328 transitions. Word has length 62 [2023-12-02 16:03:28,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:28,893 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 328 transitions. [2023-12-02 16:03:28,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 6.833333333333333) internal successors, (41), 7 states have internal predecessors, (41), 4 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 16:03:28,893 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 328 transitions. [2023-12-02 16:03:28,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-02 16:03:28,894 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:28,894 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:28,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 16:03:29,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 16:03:29,100 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:03:29,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:29,100 INFO L85 PathProgramCache]: Analyzing trace with hash 118431632, now seen corresponding path program 1 times [2023-12-02 16:03:29,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:29,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093994084] [2023-12-02 16:03:29,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:29,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:29,110 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:03:29,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193056851] [2023-12-02 16:03:29,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:29,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:29,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:03:29,111 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:03:29,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 16:03:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:29,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 16:03:29,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:03:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 16:03:29,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:03:29,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:29,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093994084] [2023-12-02 16:03:29,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:03:29,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193056851] [2023-12-02 16:03:29,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193056851] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:03:29,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [253158085] [2023-12-02 16:03:29,786 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2023-12-02 16:03:29,787 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:03:29,787 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:03:29,787 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:03:29,787 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:03:32,596 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 16:03:32,596 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 16:03:32,597 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:03:34,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [253158085] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:03:34,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:03:34,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [7] total 24 [2023-12-02 16:03:34,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599846162] [2023-12-02 16:03:34,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:03:34,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 16:03:34,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:34,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 16:03:34,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2023-12-02 16:03:34,530 INFO L87 Difference]: Start difference. First operand 271 states and 328 transitions. Second operand has 19 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 16:03:37,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:37,661 INFO L93 Difference]: Finished difference Result 308 states and 341 transitions. [2023-12-02 16:03:37,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 16:03:37,661 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 63 [2023-12-02 16:03:37,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:37,663 INFO L225 Difference]: With dead ends: 308 [2023-12-02 16:03:37,663 INFO L226 Difference]: Without dead ends: 262 [2023-12-02 16:03:37,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 102 SyntacticMatches, 18 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 16:03:37,664 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 429 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:37,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 124 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 16:03:37,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-12-02 16:03:37,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 258. [2023-12-02 16:03:37,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 181 states have (on average 1.3646408839779005) internal successors, (247), 232 states have internal predecessors, (247), 22 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-12-02 16:03:37,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 291 transitions. [2023-12-02 16:03:37,685 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 291 transitions. Word has length 63 [2023-12-02 16:03:37,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:37,685 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 291 transitions. [2023-12-02 16:03:37,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 16:03:37,686 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 291 transitions. [2023-12-02 16:03:37,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 16:03:37,687 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:37,687 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:37,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 16:03:37,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 16:03:37,887 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:03:37,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:37,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1616325439, now seen corresponding path program 1 times [2023-12-02 16:03:37,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:37,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241469145] [2023-12-02 16:03:37,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:37,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:37,895 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:03:37,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1992635530] [2023-12-02 16:03:37,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:37,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:37,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:03:37,896 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:03:37,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 16:03:37,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:37,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:03:37,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:03:38,070 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 16:03:38,071 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:03:38,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:38,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241469145] [2023-12-02 16:03:38,071 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:03:38,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992635530] [2023-12-02 16:03:38,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992635530] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:03:38,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:03:38,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:03:38,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294666052] [2023-12-02 16:03:38,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:03:38,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:03:38,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:38,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:03:38,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:03:38,073 INFO L87 Difference]: Start difference. First operand 258 states and 291 transitions. Second operand has 4 states, 3 states have (on average 18.666666666666668) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 16:03:39,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:39,250 INFO L93 Difference]: Finished difference Result 359 states and 394 transitions. [2023-12-02 16:03:39,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:03:39,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 18.666666666666668) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 84 [2023-12-02 16:03:39,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:39,253 INFO L225 Difference]: With dead ends: 359 [2023-12-02 16:03:39,253 INFO L226 Difference]: Without dead ends: 357 [2023-12-02 16:03:39,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:03:39,254 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 180 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:39,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 151 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 16:03:39,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2023-12-02 16:03:39,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 255. [2023-12-02 16:03:39,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 180 states have (on average 1.35) internal successors, (243), 229 states have internal predecessors, (243), 22 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-12-02 16:03:39,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 287 transitions. [2023-12-02 16:03:39,288 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 287 transitions. Word has length 84 [2023-12-02 16:03:39,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:39,288 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 287 transitions. [2023-12-02 16:03:39,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 18.666666666666668) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 16:03:39,289 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 287 transitions. [2023-12-02 16:03:39,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-02 16:03:39,290 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:39,290 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:39,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 16:03:39,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:39,490 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:03:39,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:39,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1433518841, now seen corresponding path program 1 times [2023-12-02 16:03:39,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:39,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248914769] [2023-12-02 16:03:39,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:39,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:39,498 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:03:39,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362478224] [2023-12-02 16:03:39,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:39,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:39,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:03:39,499 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:03:39,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 16:03:39,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:39,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:03:39,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:03:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 16:03:39,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:03:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 16:03:39,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:39,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248914769] [2023-12-02 16:03:39,777 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:03:39,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362478224] [2023-12-02 16:03:39,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362478224] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:03:39,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1300931170] [2023-12-02 16:03:39,780 INFO L159 IcfgInterpreter]: Started Sifa with 46 locations of interest [2023-12-02 16:03:39,780 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:03:39,780 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:03:39,780 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:03:39,780 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:03:41,857 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 16:03:41,858 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 16:03:41,859 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:03:45,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1300931170] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:03:45,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 16:03:45,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [3, 3] total 26 [2023-12-02 16:03:45,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760806099] [2023-12-02 16:03:45,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:03:45,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 16:03:45,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:45,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 16:03:45,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2023-12-02 16:03:45,111 INFO L87 Difference]: Start difference. First operand 255 states and 287 transitions. Second operand has 23 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 16:03:49,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:49,146 INFO L93 Difference]: Finished difference Result 258 states and 289 transitions. [2023-12-02 16:03:49,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 16:03:49,147 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 85 [2023-12-02 16:03:49,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:49,148 INFO L225 Difference]: With dead ends: 258 [2023-12-02 16:03:49,148 INFO L226 Difference]: Without dead ends: 257 [2023-12-02 16:03:49,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 206 SyntacticMatches, 22 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=346, Invalid=1060, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 16:03:49,149 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 515 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 1597 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:49,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 152 Invalid, 1649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1597 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-02 16:03:49,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-12-02 16:03:49,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 255. [2023-12-02 16:03:49,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 180 states have (on average 1.3444444444444446) internal successors, (242), 229 states have internal predecessors, (242), 22 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-12-02 16:03:49,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 286 transitions. [2023-12-02 16:03:49,170 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 286 transitions. Word has length 85 [2023-12-02 16:03:49,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:49,170 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 286 transitions. [2023-12-02 16:03:49,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 16:03:49,171 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 286 transitions. [2023-12-02 16:03:49,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-02 16:03:49,172 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:49,172 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:49,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 16:03:49,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:49,372 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:03:49,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:49,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1945629513, now seen corresponding path program 1 times [2023-12-02 16:03:49,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:49,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258962701] [2023-12-02 16:03:49,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:49,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:49,381 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:03:49,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1133421625] [2023-12-02 16:03:49,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:49,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:49,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:03:49,383 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:03:49,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 16:03:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:49,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:03:49,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:03:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 16:03:49,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:03:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 16:03:49,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:49,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258962701] [2023-12-02 16:03:49,661 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:03:49,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133421625] [2023-12-02 16:03:49,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133421625] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:03:49,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [41333387] [2023-12-02 16:03:49,664 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-12-02 16:03:49,664 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:03:49,664 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:03:49,665 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:03:49,665 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:03:52,257 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 16:03:52,258 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 16:03:52,258 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:03:54,694 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13089#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (not (= |ULTIMATE.start_main_~b~0#1| 0)) (<= 1 |#StackHeapBarrier|) (<= (+ 9223372036854775807 |ULTIMATE.start_main_~r~0#1|) 0) (= |ULTIMATE.start_main_~p~0#1| 1) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 0 (+ |ULTIMATE.start_main_~a~0#1| 33)) (= (+ |ULTIMATE.start_main_~q~0#1| 1) 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~r~0#1|)) (<= |ULTIMATE.start_main_~y~0#1| 20) (<= |ULTIMATE.start_main_~x~0#1| 20) (= |ULTIMATE.start_main_~s~0#1| 1))' at error location [2023-12-02 16:03:54,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:03:54,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 16:03:54,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-12-02 16:03:54,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455611577] [2023-12-02 16:03:54,695 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 16:03:54,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:03:54,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:54,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:03:54,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2023-12-02 16:03:54,697 INFO L87 Difference]: Start difference. First operand 255 states and 286 transitions. Second operand has 6 states, 5 states have (on average 22.8) internal successors, (114), 6 states have internal predecessors, (114), 5 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-12-02 16:03:56,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:56,219 INFO L93 Difference]: Finished difference Result 733 states and 815 transitions. [2023-12-02 16:03:56,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:03:56,220 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 22.8) internal successors, (114), 6 states have internal predecessors, (114), 5 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 87 [2023-12-02 16:03:56,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:56,223 INFO L225 Difference]: With dead ends: 733 [2023-12-02 16:03:56,223 INFO L226 Difference]: Without dead ends: 731 [2023-12-02 16:03:56,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 206 SyntacticMatches, 28 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2023-12-02 16:03:56,224 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 337 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:56,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 334 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 16:03:56,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2023-12-02 16:03:56,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 448. [2023-12-02 16:03:56,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 355 states have (on average 1.4253521126760564) internal successors, (506), 404 states have internal predecessors, (506), 40 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-12-02 16:03:56,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 586 transitions. [2023-12-02 16:03:56,266 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 586 transitions. Word has length 87 [2023-12-02 16:03:56,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:56,266 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 586 transitions. [2023-12-02 16:03:56,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 22.8) internal successors, (114), 6 states have internal predecessors, (114), 5 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-12-02 16:03:56,267 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 586 transitions. [2023-12-02 16:03:56,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-02 16:03:56,268 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:56,268 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:56,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 16:03:56,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 16:03:56,469 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:03:56,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:56,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1439189739, now seen corresponding path program 1 times [2023-12-02 16:03:56,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:56,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557248009] [2023-12-02 16:03:56,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:56,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:56,478 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:03:56,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57313175] [2023-12-02 16:03:56,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:56,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:56,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:03:56,480 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:03:56,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 16:03:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:56,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 16:03:56,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:03:56,811 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 16:03:56,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:03:56,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:56,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557248009] [2023-12-02 16:03:56,891 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:03:56,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57313175] [2023-12-02 16:03:56,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57313175] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:03:56,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [976709653] [2023-12-02 16:03:56,894 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-12-02 16:03:56,894 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:03:56,894 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:03:56,894 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:03:56,894 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:04:10,520 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 16:04:10,521 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 16:04:10,522 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:04:23,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [976709653] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:04:23,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:04:23,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [5] total 38 [2023-12-02 16:04:23,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167313757] [2023-12-02 16:04:23,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:04:23,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-02 16:04:23,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:04:23,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-02 16:04:23,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1341, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 16:04:23,925 INFO L87 Difference]: Start difference. First operand 448 states and 586 transitions. Second operand has 35 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 16:05:13,768 WARN L293 SmtUtils]: Spent 13.19s on a formula simplification. DAG size of input: 117 DAG size of output: 74 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:05:54,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-02 16:05:57,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-02 16:06:12,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-02 16:06:15,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-02 16:06:16,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-02 16:06:18,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-02 16:06:24,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:06:24,417 INFO L93 Difference]: Finished difference Result 603 states and 841 transitions. [2023-12-02 16:06:24,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-12-02 16:06:24,418 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 89 [2023-12-02 16:06:24,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:06:24,422 INFO L225 Difference]: With dead ends: 603 [2023-12-02 16:06:24,422 INFO L226 Difference]: Without dead ends: 492 [2023-12-02 16:06:24,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 133 SyntacticMatches, 17 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2321 ImplicationChecksByTransitivity, 88.8s TimeCoverageRelationStatistics Valid=2127, Invalid=6063, Unknown=0, NotChecked=0, Total=8190 [2023-12-02 16:06:24,425 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 2211 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1364 mSolverCounterSat, 461 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2211 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 1364 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.9s IncrementalHoareTripleChecker+Time [2023-12-02 16:06:24,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2211 Valid, 58 Invalid, 1828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 1364 Invalid, 3 Unknown, 0 Unchecked, 44.9s Time] [2023-12-02 16:06:24,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2023-12-02 16:06:24,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 430. [2023-12-02 16:06:24,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 375 states have (on average 1.1573333333333333) internal successors, (434), 382 states have internal predecessors, (434), 44 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-12-02 16:06:24,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 522 transitions. [2023-12-02 16:06:24,483 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 522 transitions. Word has length 89 [2023-12-02 16:06:24,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:06:24,483 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 522 transitions. [2023-12-02 16:06:24,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 16:06:24,483 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 522 transitions. [2023-12-02 16:06:24,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-12-02 16:06:24,484 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:06:24,485 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:06:24,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 16:06:24,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:06:24,688 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:06:24,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:06:24,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1665209000, now seen corresponding path program 1 times [2023-12-02 16:06:24,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:06:24,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104139864] [2023-12-02 16:06:24,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:06:24,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:06:24,697 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:06:24,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46204864] [2023-12-02 16:06:24,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:06:24,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:06:24,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:06:24,699 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:06:24,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 16:06:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:06:24,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 16:06:24,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:06:25,076 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 16:06:25,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:06:25,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:06:25,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104139864] [2023-12-02 16:06:25,154 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:06:25,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46204864] [2023-12-02 16:06:25,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46204864] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:06:25,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1902289117] [2023-12-02 16:06:25,157 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-12-02 16:06:25,157 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:06:25,157 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:06:25,157 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:06:25,157 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:06:37,841 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 16:06:37,842 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 16:06:37,843 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:06:50,014 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16333#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (<= |ULTIMATE.start_main_~q~0#1| 0) (<= 1 |#StackHeapBarrier|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~q~0#1|)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~s~0#1| 9223372036854775808) (<= 1 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~r~0#1| 0) (<= 9223372036854775808 (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~s~0#1|)) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~r~0#1|)) (<= |ULTIMATE.start_main_~y~0#1| 20) (<= |ULTIMATE.start_main_~x~0#1| 20) (<= |ULTIMATE.start_main_~p~0#1| 9223372036854775807))' at error location [2023-12-02 16:06:50,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:06:50,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:06:50,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2023-12-02 16:06:50,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201665230] [2023-12-02 16:06:50,014 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 16:06:50,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:06:50,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:06:50,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:06:50,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1417, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 16:06:50,016 INFO L87 Difference]: Start difference. First operand 430 states and 522 transitions. Second operand has 6 states, 5 states have (on average 12.4) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 16:06:50,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:06:50,282 INFO L93 Difference]: Finished difference Result 481 states and 577 transitions. [2023-12-02 16:06:50,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:06:50,283 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.4) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 90 [2023-12-02 16:06:50,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:06:50,286 INFO L225 Difference]: With dead ends: 481 [2023-12-02 16:06:50,286 INFO L226 Difference]: Without dead ends: 480 [2023-12-02 16:06:50,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 135 SyntacticMatches, 17 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=239, Invalid=1567, Unknown=0, NotChecked=0, Total=1806 [2023-12-02 16:06:50,288 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 110 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:06:50,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 103 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:06:50,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2023-12-02 16:06:50,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 439. [2023-12-02 16:06:50,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 384 states have (on average 1.1536458333333333) internal successors, (443), 391 states have internal predecessors, (443), 44 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-12-02 16:06:50,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 531 transitions. [2023-12-02 16:06:50,373 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 531 transitions. Word has length 90 [2023-12-02 16:06:50,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:06:50,373 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 531 transitions. [2023-12-02 16:06:50,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.4) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 16:06:50,373 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 531 transitions. [2023-12-02 16:06:50,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-12-02 16:06:50,374 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:06:50,374 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:06:50,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-02 16:06:50,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:06:50,575 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:06:50,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:06:50,575 INFO L85 PathProgramCache]: Analyzing trace with hash -408141400, now seen corresponding path program 2 times [2023-12-02 16:06:50,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:06:50,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069817592] [2023-12-02 16:06:50,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:06:50,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:06:50,583 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:06:50,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130214775] [2023-12-02 16:06:50,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:06:50,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:06:50,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:06:50,584 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:06:50,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 16:06:50,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 16:06:50,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:06:50,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 16:06:50,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:06:50,767 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 16:06:50,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:06:51,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:06:51,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069817592] [2023-12-02 16:06:51,186 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:06:51,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130214775] [2023-12-02 16:06:51,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130214775] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:06:51,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [726700559] [2023-12-02 16:06:51,187 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-12-02 16:06:51,187 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:06:51,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:06:51,188 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:06:51,188 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:07:03,057 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 16:07:03,057 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 16:07:03,058 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:07:15,107 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17727#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (<= |ULTIMATE.start_main_~q~0#1| 0) (<= 0 (+ 19 |ULTIMATE.start_main_~b~0#1|)) (<= |ULTIMATE.start_main_~b~0#1| 20) (<= 1 |#StackHeapBarrier|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~q~0#1|)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~s~0#1| 9223372036854775808) (<= 1 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~r~0#1| 0) (<= 9223372036854775808 (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~s~0#1|)) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~r~0#1|)) (<= |ULTIMATE.start_main_~y~0#1| 20) (<= |ULTIMATE.start_main_~x~0#1| 20) (<= |ULTIMATE.start_main_~p~0#1| 9223372036854775807))' at error location [2023-12-02 16:07:15,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:07:15,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:07:15,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2023-12-02 16:07:15,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997240395] [2023-12-02 16:07:15,108 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 16:07:15,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:07:15,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:07:15,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:07:15,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2023-12-02 16:07:15,109 INFO L87 Difference]: Start difference. First operand 439 states and 531 transitions. Second operand has 5 states, 4 states have (on average 15.5) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 16:07:15,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:07:15,282 INFO L93 Difference]: Finished difference Result 502 states and 600 transitions. [2023-12-02 16:07:15,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:07:15,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 15.5) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 90 [2023-12-02 16:07:15,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:07:15,285 INFO L225 Difference]: With dead ends: 502 [2023-12-02 16:07:15,285 INFO L226 Difference]: Without dead ends: 501 [2023-12-02 16:07:15,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 136 SyntacticMatches, 17 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 16:07:15,287 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 82 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:07:15,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 101 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:07:15,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2023-12-02 16:07:15,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 482. [2023-12-02 16:07:15,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 423 states have (on average 1.1513002364066194) internal successors, (487), 430 states have internal predecessors, (487), 48 states have call successors, (48), 3 states have call predecessors, (48), 3 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2023-12-02 16:07:15,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 583 transitions. [2023-12-02 16:07:15,357 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 583 transitions. Word has length 90 [2023-12-02 16:07:15,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:07:15,357 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 583 transitions. [2023-12-02 16:07:15,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 15.5) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 16:07:15,357 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 583 transitions. [2023-12-02 16:07:15,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-02 16:07:15,358 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:07:15,359 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:07:15,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 16:07:15,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-12-02 16:07:15,559 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:07:15,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:07:15,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1756950710, now seen corresponding path program 1 times [2023-12-02 16:07:15,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:07:15,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968815865] [2023-12-02 16:07:15,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:07:15,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:07:15,568 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:07:15,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937413903] [2023-12-02 16:07:15,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:07:15,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:07:15,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:07:15,569 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:07:15,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 16:07:15,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:07:15,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 16:07:15,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:07:15,929 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 16:07:15,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:07:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 16:07:16,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:07:16,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968815865] [2023-12-02 16:07:16,521 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:07:16,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937413903] [2023-12-02 16:07:16,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937413903] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:07:16,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [580909531] [2023-12-02 16:07:16,523 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-12-02 16:07:16,523 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:07:16,523 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:07:16,523 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:07:16,523 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:07:28,983 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 16:07:28,984 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 16:07:28,984 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:07:39,501 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19435#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (<= 1 |ULTIMATE.start_main_~p~0#1|) (<= 1 |#StackHeapBarrier|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~q~0#1|)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 9223372036854775808 (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|)) (<= 1 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~r~0#1| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~r~0#1|)) (<= |ULTIMATE.start_main_~y~0#1| 20) (<= (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~s~0#1|) 9223372036854775807) (<= |ULTIMATE.start_main_~x~0#1| 20))' at error location [2023-12-02 16:07:39,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:07:39,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 16:07:39,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-12-02 16:07:39,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156610367] [2023-12-02 16:07:39,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 16:07:39,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 16:07:39,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:07:39,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 16:07:39,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1501, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 16:07:39,504 INFO L87 Difference]: Start difference. First operand 482 states and 583 transitions. Second operand has 9 states, 8 states have (on average 15.5) internal successors, (124), 9 states have internal predecessors, (124), 5 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-12-02 16:07:41,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:07:41,383 INFO L93 Difference]: Finished difference Result 575 states and 684 transitions. [2023-12-02 16:07:41,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 16:07:41,384 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 15.5) internal successors, (124), 9 states have internal predecessors, (124), 5 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 92 [2023-12-02 16:07:41,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:07:41,387 INFO L225 Difference]: With dead ends: 575 [2023-12-02 16:07:41,387 INFO L226 Difference]: Without dead ends: 573 [2023-12-02 16:07:41,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 216 SyntacticMatches, 18 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=250, Invalid=1820, Unknown=0, NotChecked=0, Total=2070 [2023-12-02 16:07:41,389 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 144 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:07:41,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 258 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-02 16:07:41,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2023-12-02 16:07:41,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 518. [2023-12-02 16:07:41,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 456 states have (on average 1.1491228070175439) internal successors, (524), 463 states have internal predecessors, (524), 51 states have call successors, (51), 3 states have call predecessors, (51), 3 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2023-12-02 16:07:41,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 626 transitions. [2023-12-02 16:07:41,454 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 626 transitions. Word has length 92 [2023-12-02 16:07:41,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:07:41,454 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 626 transitions. [2023-12-02 16:07:41,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 15.5) internal successors, (124), 9 states have internal predecessors, (124), 5 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-12-02 16:07:41,454 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 626 transitions. [2023-12-02 16:07:41,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-02 16:07:41,455 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:07:41,455 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:07:41,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-02 16:07:41,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-02 16:07:41,655 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:07:41,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:07:41,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1381859766, now seen corresponding path program 2 times [2023-12-02 16:07:41,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:07:41,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971205359] [2023-12-02 16:07:41,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:07:41,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:07:41,663 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:07:41,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790648920] [2023-12-02 16:07:41,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:07:41,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:07:41,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:07:41,664 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:07:41,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 16:07:42,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 16:07:42,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:07:42,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 16:07:42,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:07:42,476 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-02 16:07:42,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:07:42,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:07:42,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971205359] [2023-12-02 16:07:42,578 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:07:42,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790648920] [2023-12-02 16:07:42,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790648920] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:07:42,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2117622654] [2023-12-02 16:07:42,580 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-12-02 16:07:42,580 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:07:42,580 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:07:42,580 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:07:42,580 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:07:54,324 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 16:07:54,325 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 16:07:54,326 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:08:05,872 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21039#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (<= 0 (+ 19 |ULTIMATE.start_main_~b~0#1|)) (<= 1 |ULTIMATE.start_main_~p~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 20) (<= 1 |#StackHeapBarrier|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~q~0#1|)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 9223372036854775808 (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|)) (<= 1 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~r~0#1| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~r~0#1|)) (<= |ULTIMATE.start_main_~y~0#1| 20) (<= (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~s~0#1|) 9223372036854775807) (<= |ULTIMATE.start_main_~x~0#1| 20))' at error location [2023-12-02 16:08:05,872 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:08:05,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:08:05,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2023-12-02 16:08:05,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272753825] [2023-12-02 16:08:05,872 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 16:08:05,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:08:05,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:08:05,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:08:05,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1440, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 16:08:05,873 INFO L87 Difference]: Start difference. First operand 518 states and 626 transitions. Second operand has 5 states, 4 states have (on average 11.0) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:08:06,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:08:06,100 INFO L93 Difference]: Finished difference Result 527 states and 630 transitions. [2023-12-02 16:08:06,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:08:06,101 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 92 [2023-12-02 16:08:06,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:08:06,103 INFO L225 Difference]: With dead ends: 527 [2023-12-02 16:08:06,103 INFO L226 Difference]: Without dead ends: 526 [2023-12-02 16:08:06,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 140 SyntacticMatches, 18 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=207, Invalid=1515, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 16:08:06,104 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 58 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:08:06,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 135 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:08:06,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2023-12-02 16:08:06,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 518. [2023-12-02 16:08:06,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 456 states have (on average 1.1469298245614035) internal successors, (523), 463 states have internal predecessors, (523), 51 states have call successors, (51), 3 states have call predecessors, (51), 3 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2023-12-02 16:08:06,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 625 transitions. [2023-12-02 16:08:06,189 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 625 transitions. Word has length 92 [2023-12-02 16:08:06,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:08:06,189 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 625 transitions. [2023-12-02 16:08:06,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:08:06,189 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 625 transitions. [2023-12-02 16:08:06,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-12-02 16:08:06,190 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:08:06,190 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:08:06,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-02 16:08:06,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-02 16:08:06,391 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:08:06,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:08:06,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1196158697, now seen corresponding path program 2 times [2023-12-02 16:08:06,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:08:06,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687031493] [2023-12-02 16:08:06,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:08:06,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:08:06,401 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:08:06,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1679731854] [2023-12-02 16:08:06,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:08:06,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:08:06,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:08:06,402 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:08:06,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-02 16:08:06,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 16:08:06,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:08:06,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 16:08:06,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:08:06,970 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 16:08:06,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:08:07,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:08:07,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687031493] [2023-12-02 16:08:07,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:08:07,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679731854] [2023-12-02 16:08:07,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679731854] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:08:07,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [109439365] [2023-12-02 16:08:07,099 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2023-12-02 16:08:07,099 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:08:07,099 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:08:07,099 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:08:07,099 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:08:09,513 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 16:08:09,514 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 16:08:09,515 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:08:13,162 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22625#(and (<= |ULTIMATE.start_main_~b~0#1| 20) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~p~0#1| 1) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= (+ (* |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~y~0#1|) 9223372036854775809) 0) (<= 0 (+ |ULTIMATE.start_main_~a~0#1| 33)) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~q~0#1| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~r~0#1|)) (<= |ULTIMATE.start_main_~a~0#1| 20) (<= |ULTIMATE.start_main_~y~0#1| 20) (<= |ULTIMATE.start_main_~x~0#1| 20) (= |ULTIMATE.start_main_~s~0#1| 1))' at error location [2023-12-02 16:08:13,162 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:08:13,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:08:13,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-12-02 16:08:13,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991802307] [2023-12-02 16:08:13,163 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 16:08:13,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 16:08:13,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:08:13,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 16:08:13,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2023-12-02 16:08:13,164 INFO L87 Difference]: Start difference. First operand 518 states and 625 transitions. Second operand has 10 states, 8 states have (on average 8.5) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 16:08:13,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:08:13,698 INFO L93 Difference]: Finished difference Result 575 states and 686 transitions. [2023-12-02 16:08:13,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 16:08:13,698 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 8.5) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 98 [2023-12-02 16:08:13,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:08:13,701 INFO L225 Difference]: With dead ends: 575 [2023-12-02 16:08:13,702 INFO L226 Difference]: Without dead ends: 574 [2023-12-02 16:08:13,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 155 SyntacticMatches, 31 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 16:08:13,703 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 226 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:08:13,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 219 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:08:13,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2023-12-02 16:08:13,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 518. [2023-12-02 16:08:13,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 456 states have (on average 1.144736842105263) internal successors, (522), 463 states have internal predecessors, (522), 51 states have call successors, (51), 3 states have call predecessors, (51), 3 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2023-12-02 16:08:13,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 624 transitions. [2023-12-02 16:08:13,770 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 624 transitions. Word has length 98 [2023-12-02 16:08:13,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:08:13,771 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 624 transitions. [2023-12-02 16:08:13,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 8.5) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 16:08:13,771 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 624 transitions. [2023-12-02 16:08:13,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-12-02 16:08:13,772 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:08:13,772 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:08:13,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-02 16:08:13,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-02 16:08:13,973 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:08:13,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:08:13,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1824596105, now seen corresponding path program 1 times [2023-12-02 16:08:13,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:08:13,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080142713] [2023-12-02 16:08:13,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:08:13,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:08:13,982 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:08:13,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [263626751] [2023-12-02 16:08:13,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:08:13,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:08:13,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:08:13,984 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:08:13,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-02 16:08:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:08:14,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 16:08:14,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:08:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-02 16:08:14,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:08:14,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:08:14,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080142713] [2023-12-02 16:08:14,808 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:08:14,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263626751] [2023-12-02 16:08:14,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263626751] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:08:14,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1230805987] [2023-12-02 16:08:14,810 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-12-02 16:08:14,810 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:08:14,810 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:08:14,810 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:08:14,810 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:08:26,934 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 16:08:26,935 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 16:08:26,935 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:08:39,424 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24257#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (<= 1 |ULTIMATE.start_main_~p~0#1|) (<= 1 |#StackHeapBarrier|) (= (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~s~0#1|) (+ (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|) 1)) (<= (+ (* |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~y~0#1|) 9223372036854775809) 0) (<= |ULTIMATE.start_main_~s~0#1| 9223372036854775808) (<= 1 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~r~0#1| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~r~0#1|)) (<= |ULTIMATE.start_main_~y~0#1| 20) (<= 0 (+ 9223372036854775806 |ULTIMATE.start_main_~q~0#1|)) (<= |ULTIMATE.start_main_~x~0#1| 20) (<= |ULTIMATE.start_main_~p~0#1| 9223372036854775807))' at error location [2023-12-02 16:08:39,424 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:08:39,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:08:39,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-12-02 16:08:39,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391284422] [2023-12-02 16:08:39,425 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 16:08:39,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 16:08:39,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:08:39,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 16:08:39,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1789, Unknown=0, NotChecked=0, Total=2070 [2023-12-02 16:08:39,427 INFO L87 Difference]: Start difference. First operand 518 states and 624 transitions. Second operand has 10 states, 8 states have (on average 8.5) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 16:08:39,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:08:39,880 INFO L93 Difference]: Finished difference Result 672 states and 802 transitions. [2023-12-02 16:08:39,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 16:08:39,881 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 8.5) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 98 [2023-12-02 16:08:39,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:08:39,884 INFO L225 Difference]: With dead ends: 672 [2023-12-02 16:08:39,884 INFO L226 Difference]: Without dead ends: 671 [2023-12-02 16:08:39,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 153 SyntacticMatches, 18 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=292, Invalid=1870, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 16:08:39,885 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 98 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:08:39,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 302 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:08:39,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2023-12-02 16:08:40,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 563. [2023-12-02 16:08:40,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 497 states have (on average 1.1348088531187124) internal successors, (564), 504 states have internal predecessors, (564), 55 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2023-12-02 16:08:40,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 674 transitions. [2023-12-02 16:08:40,005 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 674 transitions. Word has length 98 [2023-12-02 16:08:40,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:08:40,006 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 674 transitions. [2023-12-02 16:08:40,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 8.5) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 16:08:40,006 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 674 transitions. [2023-12-02 16:08:40,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-12-02 16:08:40,007 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:08:40,007 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:08:40,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-12-02 16:08:40,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:08:40,211 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:08:40,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:08:40,211 INFO L85 PathProgramCache]: Analyzing trace with hash 643346009, now seen corresponding path program 1 times [2023-12-02 16:08:40,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:08:40,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351815078] [2023-12-02 16:08:40,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:08:40,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:08:40,221 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:08:40,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115487158] [2023-12-02 16:08:40,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:08:40,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:08:40,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:08:40,224 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:08:40,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-02 16:08:40,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:08:40,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:08:40,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:08:40,331 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-02 16:08:40,331 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:08:40,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:08:40,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351815078] [2023-12-02 16:08:40,331 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:08:40,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115487158] [2023-12-02 16:08:40,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115487158] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:08:40,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:08:40,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:08:40,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211640664] [2023-12-02 16:08:40,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:08:40,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:08:40,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:08:40,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:08:40,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:08:40,334 INFO L87 Difference]: Start difference. First operand 563 states and 674 transitions. Second operand has 3 states, 2 states have (on average 30.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 16:08:40,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:08:40,448 INFO L93 Difference]: Finished difference Result 566 states and 674 transitions. [2023-12-02 16:08:40,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:08:40,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 30.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 101 [2023-12-02 16:08:40,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:08:40,451 INFO L225 Difference]: With dead ends: 566 [2023-12-02 16:08:40,451 INFO L226 Difference]: Without dead ends: 565 [2023-12-02 16:08:40,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 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 16:08:40,452 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 9 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:08:40,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 77 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:08:40,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2023-12-02 16:08:40,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 563. [2023-12-02 16:08:40,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 497 states have (on average 1.1287726358148893) internal successors, (561), 504 states have internal predecessors, (561), 55 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2023-12-02 16:08:40,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 671 transitions. [2023-12-02 16:08:40,524 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 671 transitions. Word has length 101 [2023-12-02 16:08:40,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:08:40,524 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 671 transitions. [2023-12-02 16:08:40,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 30.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 16:08:40,524 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 671 transitions. [2023-12-02 16:08:40,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-12-02 16:08:40,524 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:08:40,525 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:08:40,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-12-02 16:08:40,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:08:40,725 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:08:40,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:08:40,725 INFO L85 PathProgramCache]: Analyzing trace with hash -563470503, now seen corresponding path program 2 times [2023-12-02 16:08:40,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:08:40,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645058351] [2023-12-02 16:08:40,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:08:40,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:08:40,734 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:08:40,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156730698] [2023-12-02 16:08:40,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:08:40,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:08:40,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:08:40,735 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:08:40,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-02 16:08:40,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 16:08:40,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:08:40,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 16:08:40,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:08:41,357 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-02 16:08:41,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:08:41,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:08:41,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645058351] [2023-12-02 16:08:41,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:08:41,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156730698] [2023-12-02 16:08:41,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156730698] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:08:41,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1982274951] [2023-12-02 16:08:41,492 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-12-02 16:08:41,492 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:08:41,492 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:08:41,492 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:08:41,492 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:08:53,900 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 16:08:53,901 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 16:08:53,902 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:09:11,517 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27659#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (<= |ULTIMATE.start_main_~q~0#1| 0) (<= 1 |ULTIMATE.start_main_~p~0#1|) (<= 1 |#StackHeapBarrier|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~q~0#1|)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~s~0#1| 9223372036854775808) (<= 1 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~r~0#1| 0) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~r~0#1|)) (<= |ULTIMATE.start_main_~y~0#1| 20) (<= 9223372036854775808 (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~x~0#1|)) (<= |ULTIMATE.start_main_~x~0#1| 20) (<= |ULTIMATE.start_main_~p~0#1| 9223372036854775807))' at error location [2023-12-02 16:09:11,517 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:09:11,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:09:11,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-12-02 16:09:11,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30597873] [2023-12-02 16:09:11,517 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 16:09:11,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 16:09:11,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:09:11,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 16:09:11,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1792, Unknown=0, NotChecked=0, Total=2070 [2023-12-02 16:09:11,519 INFO L87 Difference]: Start difference. First operand 563 states and 671 transitions. Second operand has 10 states, 8 states have (on average 8.875) internal successors, (71), 10 states have internal predecessors, (71), 5 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 16:09:11,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:09:11,984 INFO L93 Difference]: Finished difference Result 664 states and 789 transitions. [2023-12-02 16:09:11,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 16:09:11,985 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 8.875) internal successors, (71), 10 states have internal predecessors, (71), 5 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 101 [2023-12-02 16:09:11,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:09:11,988 INFO L225 Difference]: With dead ends: 664 [2023-12-02 16:09:11,988 INFO L226 Difference]: Without dead ends: 663 [2023-12-02 16:09:11,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 160 SyntacticMatches, 20 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=287, Invalid=1875, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 16:09:11,989 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 78 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:09:11,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 324 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:09:11,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2023-12-02 16:09:12,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 566. [2023-12-02 16:09:12,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 500 states have (on average 1.128) internal successors, (564), 507 states have internal predecessors, (564), 55 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2023-12-02 16:09:12,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 674 transitions. [2023-12-02 16:09:12,063 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 674 transitions. Word has length 101 [2023-12-02 16:09:12,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:09:12,063 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 674 transitions. [2023-12-02 16:09:12,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 8.875) internal successors, (71), 10 states have internal predecessors, (71), 5 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 16:09:12,063 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 674 transitions. [2023-12-02 16:09:12,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-12-02 16:09:12,064 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:09:12,064 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:09:12,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-02 16:09:12,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 16:09:12,265 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:09:12,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:09:12,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1618469889, now seen corresponding path program 1 times [2023-12-02 16:09:12,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:09:12,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123461928] [2023-12-02 16:09:12,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:09:12,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:09:12,273 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:09:12,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1457806828] [2023-12-02 16:09:12,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:09:12,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:09:12,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:09:12,274 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:09:12,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-02 16:09:12,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:09:12,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 16:09:12,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:12,949 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-12-02 16:09:12,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:09:15,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:09:15,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123461928] [2023-12-02 16:09:15,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:09:15,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457806828] [2023-12-02 16:09:15,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457806828] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:09:15,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1333044948] [2023-12-02 16:09:15,067 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-12-02 16:09:15,067 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:09:15,068 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:09:15,068 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:09:15,068 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:09:26,827 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 16:09:26,828 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 16:09:26,828 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:09:43,026 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29506#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~q~0#1| 0) (<= |ULTIMATE.start_main_~b~0#1| 20) (<= 1 |#StackHeapBarrier|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~q~0#1|)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~s~0#1| 9223372036854775808) (<= 1 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~r~0#1| 0) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~r~0#1|)) (<= |ULTIMATE.start_main_~a~0#1| 20) (<= |ULTIMATE.start_main_~y~0#1| 20) (= (+ (* |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~y~0#1|) (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~x~0#1|)) |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 20) (<= (+ 9223372036854775809 (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~x~0#1|)) 0) (<= |ULTIMATE.start_main_~p~0#1| 9223372036854775807))' at error location [2023-12-02 16:09:43,026 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:09:43,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:09:43,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-12-02 16:09:43,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122958992] [2023-12-02 16:09:43,026 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 16:09:43,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 16:09:43,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:09:43,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 16:09:43,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1796, Unknown=1, NotChecked=0, Total=2070 [2023-12-02 16:09:43,028 INFO L87 Difference]: Start difference. First operand 566 states and 674 transitions. Second operand has 10 states, 8 states have (on average 9.25) internal successors, (74), 10 states have internal predecessors, (74), 5 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-02 16:09:43,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:09:43,486 INFO L93 Difference]: Finished difference Result 646 states and 767 transitions. [2023-12-02 16:09:43,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 16:09:43,486 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 9.25) internal successors, (74), 10 states have internal predecessors, (74), 5 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 107 [2023-12-02 16:09:43,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:09:43,490 INFO L225 Difference]: With dead ends: 646 [2023-12-02 16:09:43,490 INFO L226 Difference]: Without dead ends: 645 [2023-12-02 16:09:43,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 178 SyntacticMatches, 20 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=284, Invalid=1877, Unknown=1, NotChecked=0, Total=2162 [2023-12-02 16:09:43,491 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 77 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:09:43,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 338 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:09:43,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2023-12-02 16:09:43,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 584. [2023-12-02 16:09:43,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 516 states have (on average 1.12984496124031) internal successors, (583), 523 states have internal predecessors, (583), 57 states have call successors, (57), 3 states have call predecessors, (57), 3 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) [2023-12-02 16:09:43,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 697 transitions. [2023-12-02 16:09:43,567 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 697 transitions. Word has length 107 [2023-12-02 16:09:43,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:09:43,567 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 697 transitions. [2023-12-02 16:09:43,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 9.25) internal successors, (74), 10 states have internal predecessors, (74), 5 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-02 16:09:43,567 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 697 transitions. [2023-12-02 16:09:43,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-12-02 16:09:43,568 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:09:43,568 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:09:43,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-12-02 16:09:43,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-02 16:09:43,768 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:09:43,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:09:43,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1477405439, now seen corresponding path program 2 times [2023-12-02 16:09:43,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:09:43,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966277] [2023-12-02 16:09:43,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:09:43,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:09:43,777 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:09:43,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132388234] [2023-12-02 16:09:43,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:09:43,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:09:43,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:09:43,778 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:09:43,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-02 16:09:43,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 16:09:43,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:09:43,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 16:09:43,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:44,304 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2023-12-02 16:09:44,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:09:44,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:09:44,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966277] [2023-12-02 16:09:44,663 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:09:44,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132388234] [2023-12-02 16:09:44,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132388234] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:09:44,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [934881833] [2023-12-02 16:09:44,665 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-12-02 16:09:44,665 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:09:44,665 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:09:44,665 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:09:44,665 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:09:57,067 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 16:09:57,068 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 16:09:57,069 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:10:12,636 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31351#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (<= |ULTIMATE.start_main_~q~0#1| 0) (<= |ULTIMATE.start_main_~b~0#1| 20) (<= 1 |#StackHeapBarrier|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~q~0#1|)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~s~0#1| 9223372036854775808) (<= 1 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~r~0#1| 0) (<= (+ (* |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~y~0#1|) (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~x~0#1|)) 9223372036854775807) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~r~0#1|)) (<= |ULTIMATE.start_main_~y~0#1| 20) (= (+ (* |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~y~0#1|) (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~x~0#1|)) |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 20) (<= (+ 9223372036854775809 (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~x~0#1|)) 0) (<= |ULTIMATE.start_main_~p~0#1| 9223372036854775807))' at error location [2023-12-02 16:10:12,636 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:10:12,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:10:12,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-12-02 16:10:12,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519310466] [2023-12-02 16:10:12,636 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 16:10:12,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:10:12,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:10:12,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:10:12,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1509, Unknown=0, NotChecked=0, Total=1806 [2023-12-02 16:10:12,638 INFO L87 Difference]: Start difference. First operand 584 states and 697 transitions. Second operand has 7 states, 5 states have (on average 10.8) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-02 16:10:13,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:10:13,580 INFO L93 Difference]: Finished difference Result 605 states and 709 transitions. [2023-12-02 16:10:13,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 16:10:13,580 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 10.8) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 107 [2023-12-02 16:10:13,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:10:13,583 INFO L225 Difference]: With dead ends: 605 [2023-12-02 16:10:13,583 INFO L226 Difference]: Without dead ends: 604 [2023-12-02 16:10:13,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 181 SyntacticMatches, 20 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=333, Invalid=1829, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 16:10:13,584 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 200 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 16:10:13,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 163 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 16:10:13,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2023-12-02 16:10:13,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 584. [2023-12-02 16:10:13,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 516 states have (on average 1.127906976744186) internal successors, (582), 523 states have internal predecessors, (582), 57 states have call successors, (57), 3 states have call predecessors, (57), 3 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) [2023-12-02 16:10:13,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 696 transitions. [2023-12-02 16:10:13,677 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 696 transitions. Word has length 107 [2023-12-02 16:10:13,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:10:13,677 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 696 transitions. [2023-12-02 16:10:13,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 10.8) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-02 16:10:13,677 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 696 transitions. [2023-12-02 16:10:13,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-12-02 16:10:13,678 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:10:13,678 INFO L195 NwaCegarLoop]: trace histogram [9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:10:13,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-12-02 16:10:13,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-02 16:10:13,879 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:10:13,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:10:13,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1123283008, now seen corresponding path program 1 times [2023-12-02 16:10:13,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:10:13,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942484914] [2023-12-02 16:10:13,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:10:13,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:10:13,889 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:10:13,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732396828] [2023-12-02 16:10:13,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:10:13,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:10:13,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:10:13,891 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:10:13,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-02 16:10:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:10:13,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 16:10:13,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:10:14,200 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-12-02 16:10:14,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:10:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-12-02 16:10:14,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:10:14,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942484914] [2023-12-02 16:10:14,350 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:10:14,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732396828] [2023-12-02 16:10:14,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732396828] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:10:14,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [341197577] [2023-12-02 16:10:14,352 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-12-02 16:10:14,352 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:10:14,352 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:10:14,352 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:10:14,352 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:10:27,393 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 16:10:27,394 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 16:10:27,395 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:10:43,950 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33469#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (<= |ULTIMATE.start_main_~q~0#1| 0) (<= 0 (+ 19 |ULTIMATE.start_main_~b~0#1|)) (<= 1 |ULTIMATE.start_main_~p~0#1|) (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 19) (<= 1 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~r~0#1| 0) (<= (+ 9223372036854775808 |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~p~0#1|) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 20) (<= |ULTIMATE.start_main_~x~0#1| 20))' at error location [2023-12-02 16:10:43,950 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:10:43,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 16:10:43,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-12-02 16:10:43,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996418973] [2023-12-02 16:10:43,951 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 16:10:43,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:10:43,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:10:43,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:10:43,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1437, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 16:10:43,952 INFO L87 Difference]: Start difference. First operand 584 states and 696 transitions. Second operand has 8 states, 7 states have (on average 23.428571428571427) internal successors, (164), 8 states have internal predecessors, (164), 7 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-12-02 16:10:44,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:10:44,666 INFO L93 Difference]: Finished difference Result 1128 states and 1333 transitions. [2023-12-02 16:10:44,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 16:10:44,666 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 23.428571428571427) internal successors, (164), 8 states have internal predecessors, (164), 7 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 121 [2023-12-02 16:10:44,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:10:44,670 INFO L225 Difference]: With dead ends: 1128 [2023-12-02 16:10:44,670 INFO L226 Difference]: Without dead ends: 1127 [2023-12-02 16:10:44,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 298 SyntacticMatches, 24 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=229, Invalid=1663, Unknown=0, NotChecked=0, Total=1892 [2023-12-02 16:10:44,672 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 101 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:10:44,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 230 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 16:10:44,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2023-12-02 16:10:44,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 1070. [2023-12-02 16:10:44,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 958 states have (on average 1.138830897703549) internal successors, (1091), 965 states have internal predecessors, (1091), 101 states have call successors, (101), 3 states have call predecessors, (101), 3 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2023-12-02 16:10:44,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1293 transitions. [2023-12-02 16:10:44,811 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1293 transitions. Word has length 121 [2023-12-02 16:10:44,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:10:44,811 INFO L495 AbstractCegarLoop]: Abstraction has 1070 states and 1293 transitions. [2023-12-02 16:10:44,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 23.428571428571427) internal successors, (164), 8 states have internal predecessors, (164), 7 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-12-02 16:10:44,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1293 transitions. [2023-12-02 16:10:44,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-12-02 16:10:44,812 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:10:44,812 INFO L195 NwaCegarLoop]: trace histogram [9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:10:44,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-12-02 16:10:45,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:10:45,013 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:10:45,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:10:45,013 INFO L85 PathProgramCache]: Analyzing trace with hash 830954639, now seen corresponding path program 3 times [2023-12-02 16:10:45,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:10:45,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056933512] [2023-12-02 16:10:45,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:10:45,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:10:45,021 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:10:45,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1884303427] [2023-12-02 16:10:45,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 16:10:45,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:10:45,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:10:45,022 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:10:45,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-02 16:10:45,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 16:10:45,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:10:45,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 16:10:45,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:10:45,627 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-12-02 16:10:45,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:10:45,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:10:45,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056933512] [2023-12-02 16:10:45,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:10:45,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884303427] [2023-12-02 16:10:45,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884303427] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:10:45,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1554963090] [2023-12-02 16:10:45,699 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-12-02 16:10:45,699 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:10:45,699 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:10:45,699 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:10:45,699 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:10:57,468 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 16:10:57,469 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 16:10:57,470 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:11:11,886 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '36404#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~q~0#1| 0) (<= 1 |ULTIMATE.start_main_~p~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 20) (<= 1 |#StackHeapBarrier|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~q~0#1|)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~s~0#1| 9223372036854775808) (<= 1 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~r~0#1| 0) (<= 9223372036854775808 (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~s~0#1|)) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~r~0#1|)) (<= |ULTIMATE.start_main_~a~0#1| 20) (<= |ULTIMATE.start_main_~y~0#1| 20) (<= |ULTIMATE.start_main_~x~0#1| 20) (<= |ULTIMATE.start_main_~p~0#1| 9223372036854775807))' at error location [2023-12-02 16:11:11,886 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:11:11,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:11:11,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-12-02 16:11:11,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837409736] [2023-12-02 16:11:11,886 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 16:11:11,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:11:11,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:11:11,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:11:11,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1508, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 16:11:11,888 INFO L87 Difference]: Start difference. First operand 1070 states and 1293 transitions. Second operand has 7 states, 6 states have (on average 14.833333333333334) internal successors, (89), 7 states have internal predecessors, (89), 4 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-12-02 16:11:12,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:11:12,256 INFO L93 Difference]: Finished difference Result 1102 states and 1328 transitions. [2023-12-02 16:11:12,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:11:12,256 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.833333333333334) internal successors, (89), 7 states have internal predecessors, (89), 4 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 126 [2023-12-02 16:11:12,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:11:12,261 INFO L225 Difference]: With dead ends: 1102 [2023-12-02 16:11:12,261 INFO L226 Difference]: Without dead ends: 1101 [2023-12-02 16:11:12,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 198 SyntacticMatches, 25 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=241, Invalid=1739, Unknown=0, NotChecked=0, Total=1980 [2023-12-02 16:11:12,262 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 61 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:11:12,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 127 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:11:12,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2023-12-02 16:11:12,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1070. [2023-12-02 16:11:12,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 958 states have (on average 1.1377870563674322) internal successors, (1090), 965 states have internal predecessors, (1090), 101 states have call successors, (101), 3 states have call predecessors, (101), 3 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2023-12-02 16:11:12,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1292 transitions. [2023-12-02 16:11:12,448 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1292 transitions. Word has length 126 [2023-12-02 16:11:12,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:11:12,448 INFO L495 AbstractCegarLoop]: Abstraction has 1070 states and 1292 transitions. [2023-12-02 16:11:12,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.833333333333334) internal successors, (89), 7 states have internal predecessors, (89), 4 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-12-02 16:11:12,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1292 transitions. [2023-12-02 16:11:12,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-12-02 16:11:12,449 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:11:12,450 INFO L195 NwaCegarLoop]: trace histogram [9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:11:12,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-12-02 16:11:12,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:11:12,650 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:11:12,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:11:12,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1242395761, now seen corresponding path program 4 times [2023-12-02 16:11:12,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:11:12,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163058728] [2023-12-02 16:11:12,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:11:12,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:11:12,659 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:11:12,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635129952] [2023-12-02 16:11:12,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 16:11:12,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:11:12,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:11:12,660 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:11:12,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-02 16:11:12,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:11:12,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 16:11:12,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:11:13,333 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-12-02 16:11:13,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:11:13,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:11:13,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163058728] [2023-12-02 16:11:13,403 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:11:13,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635129952] [2023-12-02 16:11:13,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635129952] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:11:13,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2136625025] [2023-12-02 16:11:13,404 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-12-02 16:11:13,404 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:11:13,405 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:11:13,405 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:11:13,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:11:25,569 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 16:11:25,570 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 16:11:25,571 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:11:40,736 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39317#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (<= |ULTIMATE.start_main_~q~0#1| 0) (<= 1 |#StackHeapBarrier|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~q~0#1|)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~s~0#1| 9223372036854775808) (<= 1 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~r~0#1| 0) (<= 9223372036854775808 (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~s~0#1|)) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~r~0#1|)) (<= |ULTIMATE.start_main_~y~0#1| 20) (<= |ULTIMATE.start_main_~x~0#1| 20) (<= |ULTIMATE.start_main_~p~0#1| 9223372036854775807))' at error location [2023-12-02 16:11:40,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:11:40,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:11:40,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-12-02 16:11:40,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769097133] [2023-12-02 16:11:40,737 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 16:11:40,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:11:40,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:11:40,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:11:40,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1577, Unknown=0, NotChecked=0, Total=1806 [2023-12-02 16:11:40,739 INFO L87 Difference]: Start difference. First operand 1070 states and 1292 transitions. Second operand has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 8 states have internal predecessors, (89), 4 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-12-02 16:11:41,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:11:41,175 INFO L93 Difference]: Finished difference Result 1074 states and 1292 transitions. [2023-12-02 16:11:41,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:11:41,176 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 8 states have internal predecessors, (89), 4 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 126 [2023-12-02 16:11:41,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:11:41,181 INFO L225 Difference]: With dead ends: 1074 [2023-12-02 16:11:41,181 INFO L226 Difference]: Without dead ends: 1073 [2023-12-02 16:11:41,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 197 SyntacticMatches, 25 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=229, Invalid=1577, Unknown=0, NotChecked=0, Total=1806 [2023-12-02 16:11:41,182 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 73 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:11:41,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 271 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:11:41,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2023-12-02 16:11:41,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 1070. [2023-12-02 16:11:41,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 958 states have (on average 1.1367432150313153) internal successors, (1089), 965 states have internal predecessors, (1089), 101 states have call successors, (101), 3 states have call predecessors, (101), 3 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2023-12-02 16:11:41,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1291 transitions. [2023-12-02 16:11:41,324 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1291 transitions. Word has length 126 [2023-12-02 16:11:41,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:11:41,324 INFO L495 AbstractCegarLoop]: Abstraction has 1070 states and 1291 transitions. [2023-12-02 16:11:41,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 8 states have internal predecessors, (89), 4 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-12-02 16:11:41,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1291 transitions. [2023-12-02 16:11:41,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-12-02 16:11:41,325 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:11:41,325 INFO L195 NwaCegarLoop]: trace histogram [9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:11:41,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-12-02 16:11:41,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:11:41,526 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:11:41,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:11:41,526 INFO L85 PathProgramCache]: Analyzing trace with hash -649331199, now seen corresponding path program 5 times [2023-12-02 16:11:41,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:11:41,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509928991] [2023-12-02 16:11:41,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:11:41,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:11:41,536 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:11:41,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657453528] [2023-12-02 16:11:41,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:11:41,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:11:41,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:11:41,537 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:11:41,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-02 16:11:41,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 16:11:41,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:11:41,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 16:11:41,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:11:42,094 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 6 proven. 65 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-12-02 16:11:42,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:11:47,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:11:47,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509928991] [2023-12-02 16:11:47,105 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:11:47,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657453528] [2023-12-02 16:11:47,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657453528] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:11:47,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1234562434] [2023-12-02 16:11:47,106 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-12-02 16:11:47,107 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:11:47,107 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:11:47,107 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:11:47,107 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:11:59,263 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 16:11:59,264 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 16:11:59,265 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:12:48,199 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '42304#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~q~0#1| 0) (<= 1 |ULTIMATE.start_main_~p~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 20) (<= 1 |#StackHeapBarrier|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~q~0#1|)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~s~0#1| 9223372036854775808) (<= 1 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~r~0#1| 0) (<= 9223372036854775808 (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~s~0#1|)) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~r~0#1|)) (<= |ULTIMATE.start_main_~a~0#1| 20) (<= |ULTIMATE.start_main_~y~0#1| 20) (<= |ULTIMATE.start_main_~x~0#1| 20) (<= |ULTIMATE.start_main_~p~0#1| 9223372036854775807))' at error location [2023-12-02 16:12:48,199 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:12:48,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:12:48,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-12-02 16:12:48,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587947207] [2023-12-02 16:12:48,199 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 16:12:48,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:12:48,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:12:48,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:12:48,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1836, Unknown=9, NotChecked=0, Total=2070 [2023-12-02 16:12:48,201 INFO L87 Difference]: Start difference. First operand 1070 states and 1291 transitions. Second operand has 8 states, 6 states have (on average 11.666666666666666) internal successors, (70), 8 states have internal predecessors, (70), 4 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-02 16:12:49,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:12:49,842 INFO L93 Difference]: Finished difference Result 1126 states and 1346 transitions. [2023-12-02 16:12:49,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 16:12:49,842 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 11.666666666666666) internal successors, (70), 8 states have internal predecessors, (70), 4 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 126 [2023-12-02 16:12:49,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:12:49,847 INFO L225 Difference]: With dead ends: 1126 [2023-12-02 16:12:49,847 INFO L226 Difference]: Without dead ends: 1125 [2023-12-02 16:12:49,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 230 SyntacticMatches, 25 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 53.3s TimeCoverageRelationStatistics Valid=282, Invalid=2361, Unknown=9, NotChecked=0, Total=2652 [2023-12-02 16:12:49,848 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 234 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:12:49,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 209 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 16:12:49,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2023-12-02 16:12:49,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1079. [2023-12-02 16:12:49,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 967 states have (on average 1.1354705274043433) internal successors, (1098), 974 states have internal predecessors, (1098), 101 states have call successors, (101), 3 states have call predecessors, (101), 3 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2023-12-02 16:12:49,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1300 transitions. [2023-12-02 16:12:49,994 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1300 transitions. Word has length 126 [2023-12-02 16:12:49,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:12:49,994 INFO L495 AbstractCegarLoop]: Abstraction has 1079 states and 1300 transitions. [2023-12-02 16:12:49,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 11.666666666666666) internal successors, (70), 8 states have internal predecessors, (70), 4 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-02 16:12:49,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1300 transitions. [2023-12-02 16:12:49,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-12-02 16:12:49,995 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:12:49,995 INFO L195 NwaCegarLoop]: trace histogram [9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:12:50,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-12-02 16:12:50,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:12:50,196 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:12:50,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:12:50,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1811174143, now seen corresponding path program 6 times [2023-12-02 16:12:50,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:12:50,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331826811] [2023-12-02 16:12:50,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:12:50,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:12:50,206 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:12:50,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195988144] [2023-12-02 16:12:50,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 16:12:50,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:12:50,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:12:50,207 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:12:50,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-02 16:12:50,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 16:12:50,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:12:50,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 16:12:50,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:12:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-12-02 16:12:50,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:12:50,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:12:50,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331826811] [2023-12-02 16:12:50,869 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:12:50,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195988144] [2023-12-02 16:12:50,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195988144] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:12:50,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1437851712] [2023-12-02 16:12:50,870 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-12-02 16:12:50,870 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:12:50,871 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:12:50,871 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:12:50,871 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:13:03,304 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 16:13:03,305 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 16:13:03,306 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:13:18,768 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '45260#(and (<= |ULTIMATE.start_main_~q~0#1| 0) (<= 1 |ULTIMATE.start_main_~p~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 20) (<= 1 |#StackHeapBarrier|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~q~0#1|)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~s~0#1| 9223372036854775808) (<= 1 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~r~0#1| 0) (<= 9223372036854775808 (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~s~0#1|)) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~r~0#1|)) (<= |ULTIMATE.start_main_~y~0#1| 20) (<= |ULTIMATE.start_main_~x~0#1| 20) (<= |ULTIMATE.start_main_~p~0#1| 9223372036854775807))' at error location [2023-12-02 16:13:18,768 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:13:18,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:13:18,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-12-02 16:13:18,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748175512] [2023-12-02 16:13:18,769 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 16:13:18,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:13:18,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:13:18,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:13:18,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1593, Unknown=0, NotChecked=0, Total=1806 [2023-12-02 16:13:18,770 INFO L87 Difference]: Start difference. First operand 1079 states and 1300 transitions. Second operand has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 8 states have internal predecessors, (89), 4 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-12-02 16:13:19,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:13:19,120 INFO L93 Difference]: Finished difference Result 1088 states and 1306 transitions. [2023-12-02 16:13:19,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 16:13:19,121 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 8 states have internal predecessors, (89), 4 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 126 [2023-12-02 16:13:19,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:13:19,126 INFO L225 Difference]: With dead ends: 1088 [2023-12-02 16:13:19,126 INFO L226 Difference]: Without dead ends: 1087 [2023-12-02 16:13:19,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 197 SyntacticMatches, 25 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=213, Invalid=1593, Unknown=0, NotChecked=0, Total=1806 [2023-12-02 16:13:19,127 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 51 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:13:19,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 201 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:13:19,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2023-12-02 16:13:19,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 1079. [2023-12-02 16:13:19,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 967 states have (on average 1.1344364012409514) internal successors, (1097), 974 states have internal predecessors, (1097), 101 states have call successors, (101), 3 states have call predecessors, (101), 3 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2023-12-02 16:13:19,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1299 transitions. [2023-12-02 16:13:19,269 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1299 transitions. Word has length 126 [2023-12-02 16:13:19,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:13:19,269 INFO L495 AbstractCegarLoop]: Abstraction has 1079 states and 1299 transitions. [2023-12-02 16:13:19,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 8 states have internal predecessors, (89), 4 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-12-02 16:13:19,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1299 transitions. [2023-12-02 16:13:19,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-02 16:13:19,270 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:13:19,270 INFO L195 NwaCegarLoop]: trace histogram [9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:13:19,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-12-02 16:13:19,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-12-02 16:13:19,471 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:13:19,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:13:19,471 INFO L85 PathProgramCache]: Analyzing trace with hash 58583665, now seen corresponding path program 3 times [2023-12-02 16:13:19,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:13:19,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889781603] [2023-12-02 16:13:19,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:13:19,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:13:19,479 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:13:19,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660467190] [2023-12-02 16:13:19,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 16:13:19,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:13:19,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:13:19,481 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:13:19,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-02 16:13:19,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 16:13:19,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:13:19,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 16:13:19,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:13:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-12-02 16:13:20,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:13:20,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:13:20,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889781603] [2023-12-02 16:13:20,170 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:13:20,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660467190] [2023-12-02 16:13:20,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660467190] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:13:20,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [946808795] [2023-12-02 16:13:20,172 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-12-02 16:13:20,172 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:13:20,172 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:13:20,172 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:13:20,172 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:13:31,921 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 16:13:31,922 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 16:13:31,922 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:13:46,051 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '48172#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= 1 |ULTIMATE.start_main_~p~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 20) (<= 1 |#StackHeapBarrier|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~q~0#1|)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 9223372036854775808 (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|)) (<= 1 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~r~0#1| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~r~0#1|)) (<= |ULTIMATE.start_main_~a~0#1| 20) (<= |ULTIMATE.start_main_~y~0#1| 20) (<= (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~s~0#1|) 9223372036854775807) (<= |ULTIMATE.start_main_~x~0#1| 20))' at error location [2023-12-02 16:13:46,051 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:13:46,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:13:46,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-12-02 16:13:46,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159193830] [2023-12-02 16:13:46,052 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 16:13:46,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:13:46,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:13:46,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:13:46,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1511, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 16:13:46,053 INFO L87 Difference]: Start difference. First operand 1079 states and 1299 transitions. Second operand has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 7 states have internal predecessors, (91), 4 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-12-02 16:13:46,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:13:46,529 INFO L93 Difference]: Finished difference Result 1083 states and 1300 transitions. [2023-12-02 16:13:46,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:13:46,529 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 7 states have internal predecessors, (91), 4 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 128 [2023-12-02 16:13:46,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:13:46,536 INFO L225 Difference]: With dead ends: 1083 [2023-12-02 16:13:46,537 INFO L226 Difference]: Without dead ends: 1082 [2023-12-02 16:13:46,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 203 SyntacticMatches, 26 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=217, Invalid=1589, Unknown=0, NotChecked=0, Total=1806 [2023-12-02 16:13:46,538 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 50 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:13:46,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 174 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:13:46,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2023-12-02 16:13:46,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1079. [2023-12-02 16:13:46,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 967 states have (on average 1.1334022750775594) internal successors, (1096), 974 states have internal predecessors, (1096), 101 states have call successors, (101), 3 states have call predecessors, (101), 3 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2023-12-02 16:13:46,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1298 transitions. [2023-12-02 16:13:46,686 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1298 transitions. Word has length 128 [2023-12-02 16:13:46,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:13:46,686 INFO L495 AbstractCegarLoop]: Abstraction has 1079 states and 1298 transitions. [2023-12-02 16:13:46,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 7 states have internal predecessors, (91), 4 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-12-02 16:13:46,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1298 transitions. [2023-12-02 16:13:46,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-02 16:13:46,687 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:13:46,688 INFO L195 NwaCegarLoop]: trace histogram [9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:13:46,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-12-02 16:13:46,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-12-02 16:13:46,888 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:13:46,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:13:46,888 INFO L85 PathProgramCache]: Analyzing trace with hash 219011441, now seen corresponding path program 4 times [2023-12-02 16:13:46,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:13:46,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600783191] [2023-12-02 16:13:46,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:13:46,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:13:46,899 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:13:46,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012774339] [2023-12-02 16:13:46,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 16:13:46,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:13:46,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:13:46,901 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:13:46,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-02 16:13:46,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:13:46,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 16:13:46,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:13:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-12-02 16:13:47,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:13:47,792 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-12-02 16:13:47,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:13:47,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600783191] [2023-12-02 16:13:47,793 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:13:47,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012774339] [2023-12-02 16:13:47,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012774339] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:13:47,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2145728361] [2023-12-02 16:13:47,794 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-12-02 16:13:47,794 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:13:47,795 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:13:47,795 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:13:47,795 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:13:59,846 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 16:13:59,847 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 16:13:59,848 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:14:14,199 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '51422#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= 1 |ULTIMATE.start_main_~p~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 20) (<= 1 |#StackHeapBarrier|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~q~0#1|)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 9223372036854775808 (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|)) (<= 1 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~r~0#1| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~r~0#1|)) (<= |ULTIMATE.start_main_~a~0#1| 20) (<= |ULTIMATE.start_main_~y~0#1| 20) (<= (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~s~0#1|) 9223372036854775807) (<= |ULTIMATE.start_main_~x~0#1| 20))' at error location [2023-12-02 16:14:14,199 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:14:14,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 16:14:14,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-12-02 16:14:14,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965360898] [2023-12-02 16:14:14,199 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 16:14:14,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 16:14:14,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:14:14,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 16:14:14,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1674, Unknown=0, NotChecked=0, Total=1892 [2023-12-02 16:14:14,201 INFO L87 Difference]: Start difference. First operand 1079 states and 1298 transitions. Second operand has 11 states, 10 states have (on average 17.8) internal successors, (178), 11 states have internal predecessors, (178), 7 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-12-02 16:14:17,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:14:17,893 INFO L93 Difference]: Finished difference Result 1151 states and 1374 transitions. [2023-12-02 16:14:17,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 16:14:17,894 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 17.8) internal successors, (178), 11 states have internal predecessors, (178), 7 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 128 [2023-12-02 16:14:17,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:14:17,899 INFO L225 Difference]: With dead ends: 1151 [2023-12-02 16:14:17,899 INFO L226 Difference]: Without dead ends: 1150 [2023-12-02 16:14:17,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 314 SyntacticMatches, 26 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=278, Invalid=2172, Unknown=0, NotChecked=0, Total=2450 [2023-12-02 16:14:17,900 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 252 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-12-02 16:14:17,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 382 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-12-02 16:14:17,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2023-12-02 16:14:18,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 1133. [2023-12-02 16:14:18,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1018 states have (on average 1.1286836935166995) internal successors, (1149), 1025 states have internal predecessors, (1149), 104 states have call successors, (104), 3 states have call predecessors, (104), 3 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) [2023-12-02 16:14:18,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 1357 transitions. [2023-12-02 16:14:18,062 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 1357 transitions. Word has length 128 [2023-12-02 16:14:18,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:14:18,062 INFO L495 AbstractCegarLoop]: Abstraction has 1133 states and 1357 transitions. [2023-12-02 16:14:18,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 17.8) internal successors, (178), 11 states have internal predecessors, (178), 7 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-12-02 16:14:18,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 1357 transitions. [2023-12-02 16:14:18,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-02 16:14:18,063 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:14:18,063 INFO L195 NwaCegarLoop]: trace histogram [9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:14:18,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-12-02 16:14:18,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-12-02 16:14:18,264 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 16:14:18,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:14:18,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1076594845, now seen corresponding path program 5 times [2023-12-02 16:14:18,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:14:18,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309770460] [2023-12-02 16:14:18,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:14:18,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:14:18,272 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:14:18,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199807411] [2023-12-02 16:14:18,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:14:18,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:14:18,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:14:18,273 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:14:18,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a730710e-531d-4484-a1dd-661bba86c3c6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-02 16:14:19,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 16:14:19,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:14:19,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-02 16:14:19,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:14:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 72 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-02 16:14:44,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:14:53,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:14:53,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309770460] [2023-12-02 16:14:53,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:14:53,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199807411] [2023-12-02 16:14:53,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199807411] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:14:53,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [527064769] [2023-12-02 16:14:53,321 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-12-02 16:14:53,321 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:14:53,322 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:14:53,322 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:14:53,322 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:15:05,906 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 16:15:05,907 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 16:15:05,908 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:15:41,409 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '54494#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (<= 0 (+ 19 |ULTIMATE.start_main_~b~0#1|)) (<= 1 |ULTIMATE.start_main_~p~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 20) (<= 1 |#StackHeapBarrier|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~q~0#1|)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 9223372036854775808 (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|)) (<= 1 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~r~0#1| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~r~0#1|)) (<= |ULTIMATE.start_main_~y~0#1| 20) (<= (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~s~0#1|) 9223372036854775807) (<= |ULTIMATE.start_main_~x~0#1| 20))' at error location [2023-12-02 16:15:41,409 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:15:41,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:15:41,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-12-02 16:15:41,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303984423] [2023-12-02 16:15:41,410 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 16:15:41,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 16:15:41,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:15:41,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 16:15:41,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=3000, Unknown=11, NotChecked=0, Total=3422 [2023-12-02 16:15:41,411 INFO L87 Difference]: Start difference. First operand 1133 states and 1357 transitions. Second operand has 19 states, 15 states have (on average 4.866666666666666) internal successors, (73), 16 states have internal predecessors, (73), 5 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-02 16:15:44,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:15:46,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:15:48,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:15:50,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:15:52,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:15:54,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:15:56,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:15:58,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:16:00,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:16:02,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:16:04,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:16:06,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:16:09,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:16:15,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:16:17,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:16:19,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:16:21,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:16:23,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:16:25,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:16:27,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:16:29,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:16:31,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:16:33,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:16:36,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:16:38,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:16:40,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:16:42,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:16:43,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:16:45,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:16:47,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:16:49,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:16:51,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:16:53,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:16:55,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:17:02,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:17:04,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:17:06,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:17:08,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:17:10,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:17:16,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:17:18,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:17:20,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:17:22,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:17:29,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:17:31,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:17:33,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:17:35,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:17:36,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:17:38,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0]