./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/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_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_valuebound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/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_21195334-a9ba-4086-9173-e35362faf27d/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 4f0dc25e497896e48962fc4f59a3ea4856b5eb0408b9845e68b04a0b0a132067 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 15:52:33,580 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 15:52:33,644 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-12-02 15:52:33,650 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 15:52:33,651 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 15:52:33,675 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 15:52:33,676 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 15:52:33,676 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 15:52:33,677 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 15:52:33,677 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 15:52:33,678 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 15:52:33,678 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 15:52:33,679 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 15:52:33,679 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 15:52:33,680 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 15:52:33,680 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 15:52:33,681 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 15:52:33,681 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 15:52:33,682 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 15:52:33,682 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 15:52:33,683 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 15:52:33,686 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 15:52:33,687 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 15:52:33,687 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 15:52:33,688 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 15:52:33,688 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 15:52:33,689 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 15:52:33,689 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 15:52:33,690 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 15:52:33,690 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 15:52:33,690 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 15:52:33,691 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-12-02 15:52:33,691 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 15:52:33,691 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 15:52:33,691 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 15:52:33,691 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 15:52:33,692 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 15:52:33,692 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 15:52:33,692 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 15:52:33,692 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:52:33,693 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 15:52:33,693 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 15:52:33,693 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 15:52:33,693 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 15:52:33,693 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 15:52:33,693 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 15:52:33,694 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 15:52:33,694 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 15:52:33,694 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 15:52:33,694 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_21195334-a9ba-4086-9173-e35362faf27d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f0dc25e497896e48962fc4f59a3ea4856b5eb0408b9845e68b04a0b0a132067 [2023-12-02 15:52:33,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 15:52:33,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 15:52:33,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 15:52:33,907 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 15:52:33,908 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 15:52:33,909 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_valuebound2.c [2023-12-02 15:52:36,605 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 15:52:36,809 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 15:52:36,810 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/sv-benchmarks/c/nla-digbench-scaling/mannadiv_valuebound2.c [2023-12-02 15:52:36,816 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/data/b40930e9e/c23bf6525d1f415caaf293d8faa80713/FLAGf30ffdc8f [2023-12-02 15:52:36,828 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/data/b40930e9e/c23bf6525d1f415caaf293d8faa80713 [2023-12-02 15:52:36,831 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 15:52:36,832 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 15:52:36,833 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 15:52:36,833 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 15:52:36,837 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 15:52:36,838 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:52:36" (1/1) ... [2023-12-02 15:52:36,839 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3944d9df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:52:36, skipping insertion in model container [2023-12-02 15:52:36,839 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:52:36" (1/1) ... [2023-12-02 15:52:36,857 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 15:52:36,985 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:52:36,993 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 15:52:37,008 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:52:37,019 INFO L206 MainTranslator]: Completed translation [2023-12-02 15:52:37,020 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:52:37 WrapperNode [2023-12-02 15:52:37,020 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 15:52:37,021 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 15:52:37,021 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 15:52:37,021 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 15:52:37,027 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:52:37" (1/1) ... [2023-12-02 15:52:37,033 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:52:37" (1/1) ... [2023-12-02 15:52:37,049 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 69 [2023-12-02 15:52:37,050 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 15:52:37,050 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 15:52:37,051 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 15:52:37,051 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 15:52:37,058 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:52:37" (1/1) ... [2023-12-02 15:52:37,058 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:52:37" (1/1) ... [2023-12-02 15:52:37,059 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:52:37" (1/1) ... [2023-12-02 15:52:37,060 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:52:37" (1/1) ... [2023-12-02 15:52:37,063 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:52:37" (1/1) ... [2023-12-02 15:52:37,066 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:52:37" (1/1) ... [2023-12-02 15:52:37,067 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:52:37" (1/1) ... [2023-12-02 15:52:37,068 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:52:37" (1/1) ... [2023-12-02 15:52:37,070 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 15:52:37,071 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 15:52:37,071 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 15:52:37,071 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 15:52:37,072 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:52:37" (1/1) ... [2023-12-02 15:52:37,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:52:37,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:52:37,097 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 15:52:37,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 15:52:37,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 15:52:37,140 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 15:52:37,140 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 15:52:37,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 15:52:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 15:52:37,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 15:52:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 15:52:37,141 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 15:52:37,204 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 15:52:37,206 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 15:52:37,379 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 15:52:37,411 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 15:52:37,411 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 15:52:37,413 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:52:37 BoogieIcfgContainer [2023-12-02 15:52:37,413 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 15:52:37,416 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 15:52:37,416 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 15:52:37,420 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 15:52:37,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:52:36" (1/3) ... [2023-12-02 15:52:37,420 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@267d6b09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:52:37, skipping insertion in model container [2023-12-02 15:52:37,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:52:37" (2/3) ... [2023-12-02 15:52:37,421 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@267d6b09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:52:37, skipping insertion in model container [2023-12-02 15:52:37,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:52:37" (3/3) ... [2023-12-02 15:52:37,422 INFO L112 eAbstractionObserver]: Analyzing ICFG mannadiv_valuebound2.c [2023-12-02 15:52:37,440 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 15:52:37,440 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2023-12-02 15:52:37,485 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 15:52:37,493 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;@2e6d9062, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 15:52:37,493 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-12-02 15:52:37,498 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 48 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 15:52:37,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 15:52:37,505 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:52:37,506 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:52:37,507 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:52:37,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:52:37,512 INFO L85 PathProgramCache]: Analyzing trace with hash 885391590, now seen corresponding path program 1 times [2023-12-02 15:52:37,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:52:37,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986515192] [2023-12-02 15:52:37,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:52:37,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:52:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:52:37,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:52:37,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986515192] [2023-12-02 15:52:37,644 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-02 15:52:37,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545653258] [2023-12-02 15:52:37,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:52:37,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:52:37,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:52:37,650 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:52:37,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 15:52:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:52:37,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 15:52:37,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:52:37,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:52:37,728 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:52:37,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545653258] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:52:37,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:52:37,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 15:52:37,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671122341] [2023-12-02 15:52:37,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:52:37,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 15:52:37,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:52:37,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 15:52:37,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 15:52:37,765 INFO L87 Difference]: Start difference. First operand has 55 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 48 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:52:37,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:52:37,791 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2023-12-02 15:52:37,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 15:52:37,796 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 10 [2023-12-02 15:52:37,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:52:37,803 INFO L225 Difference]: With dead ends: 68 [2023-12-02 15:52:37,804 INFO L226 Difference]: Without dead ends: 52 [2023-12-02 15:52:37,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 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 15:52:37,810 INFO L413 NwaCegarLoop]: 54 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, 54 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 15:52:37,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 54 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:52:37,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-12-02 15:52:37,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-12-02 15:52:37,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 46 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 15:52:37,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2023-12-02 15:52:37,849 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 10 [2023-12-02 15:52:37,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:52:37,864 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2023-12-02 15:52:37,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:52:37,865 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2023-12-02 15:52:37,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 15:52:37,866 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:52:37,866 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:52:37,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 15:52:38,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 15:52:38,071 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:52:38,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:52:38,072 INFO L85 PathProgramCache]: Analyzing trace with hash 885388443, now seen corresponding path program 1 times [2023-12-02 15:52:38,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:52:38,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592507130] [2023-12-02 15:52:38,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:52:38,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:52:38,083 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:52:38,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221056346] [2023-12-02 15:52:38,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:52:38,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:52:38,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:52:38,085 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:52:38,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 15:52:38,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:52:38,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 15:52:38,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:52:38,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:52:38,253 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:52:38,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:52:38,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592507130] [2023-12-02 15:52:38,254 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:52:38,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221056346] [2023-12-02 15:52:38,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221056346] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:52:38,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:52:38,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 15:52:38,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235750012] [2023-12-02 15:52:38,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:52:38,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:52:38,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:52:38,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:52:38,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:52:38,257 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 6 states, 3 states have (on average 2.0) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:52:38,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:52:38,387 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2023-12-02 15:52:38,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:52:38,388 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 3 states have (on average 2.0) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 10 [2023-12-02 15:52:38,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:52:38,390 INFO L225 Difference]: With dead ends: 92 [2023-12-02 15:52:38,390 INFO L226 Difference]: Without dead ends: 86 [2023-12-02 15:52:38,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:52:38,392 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 186 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:52:38,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 72 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:52:38,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-12-02 15:52:38,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 72. [2023-12-02 15:52:38,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 65 states have internal predecessors, (79), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 15:52:38,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2023-12-02 15:52:38,405 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 10 [2023-12-02 15:52:38,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:52:38,405 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2023-12-02 15:52:38,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 3 states have (on average 2.0) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:52:38,406 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2023-12-02 15:52:38,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 15:52:38,406 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:52:38,406 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:52:38,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-02 15:52:38,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:52:38,611 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:52:38,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:52:38,611 INFO L85 PathProgramCache]: Analyzing trace with hash 454770653, now seen corresponding path program 1 times [2023-12-02 15:52:38,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:52:38,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776824470] [2023-12-02 15:52:38,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:52:38,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:52:38,623 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:52:38,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102122790] [2023-12-02 15:52:38,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:52:38,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:52:38,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:52:38,625 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:52:38,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 15:52:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:52:38,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 15:52:38,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:52:38,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:52:38,701 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:52:38,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:52:38,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776824470] [2023-12-02 15:52:38,702 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:52:38,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102122790] [2023-12-02 15:52:38,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102122790] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:52:38,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:52:38,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:52:38,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804881413] [2023-12-02 15:52:38,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:52:38,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:52:38,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:52:38,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:52:38,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:52:38,704 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:52:38,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:52:38,764 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2023-12-02 15:52:38,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:52:38,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 12 [2023-12-02 15:52:38,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:52:38,766 INFO L225 Difference]: With dead ends: 75 [2023-12-02 15:52:38,766 INFO L226 Difference]: Without dead ends: 69 [2023-12-02 15:52:38,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 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 15:52:38,768 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 64 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:52:38,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 29 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:52:38,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-02 15:52:38,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-12-02 15:52:38,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.5208333333333333) internal successors, (73), 62 states have internal predecessors, (73), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 15:52:38,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2023-12-02 15:52:38,780 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 12 [2023-12-02 15:52:38,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:52:38,780 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2023-12-02 15:52:38,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:52:38,781 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2023-12-02 15:52:38,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 15:52:38,781 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:52:38,781 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:52:38,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 15:52:38,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:52:38,987 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:52:38,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:52:38,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1212988407, now seen corresponding path program 1 times [2023-12-02 15:52:38,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:52:38,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925275701] [2023-12-02 15:52:38,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:52:38,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:52:38,995 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:52:38,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733082117] [2023-12-02 15:52:38,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:52:38,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:52:38,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:52:38,997 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:52:38,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 15:52:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:52:39,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 15:52:39,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:52:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:52:39,058 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:52:39,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:52:39,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925275701] [2023-12-02 15:52:39,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:52:39,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733082117] [2023-12-02 15:52:39,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733082117] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:52:39,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:52:39,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:52:39,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453504562] [2023-12-02 15:52:39,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:52:39,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:52:39,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:52:39,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:52:39,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:52:39,060 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:52:39,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:52:39,151 INFO L93 Difference]: Finished difference Result 115 states and 137 transitions. [2023-12-02 15:52:39,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:52:39,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2023-12-02 15:52:39,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:52:39,153 INFO L225 Difference]: With dead ends: 115 [2023-12-02 15:52:39,153 INFO L226 Difference]: Without dead ends: 104 [2023-12-02 15:52:39,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 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 15:52:39,155 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 25 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:52:39,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 65 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:52:39,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-12-02 15:52:39,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2023-12-02 15:52:39,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 72 states have (on average 1.4444444444444444) internal successors, (104), 86 states have internal predecessors, (104), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 15:52:39,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 116 transitions. [2023-12-02 15:52:39,171 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 116 transitions. Word has length 13 [2023-12-02 15:52:39,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:52:39,171 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 116 transitions. [2023-12-02 15:52:39,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:52:39,172 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 116 transitions. [2023-12-02 15:52:39,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 15:52:39,172 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:52:39,172 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:52:39,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 15:52:39,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:52:39,373 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:52:39,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:52:39,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1052064993, now seen corresponding path program 1 times [2023-12-02 15:52:39,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:52:39,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9498373] [2023-12-02 15:52:39,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:52:39,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:52:39,384 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:52:39,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [536384414] [2023-12-02 15:52:39,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:52:39,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:52:39,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:52:39,386 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:52:39,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 15:52:39,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:52:39,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 15:52:39,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:52:39,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:52:39,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:52:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:52:39,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:52:39,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9498373] [2023-12-02 15:52:39,668 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:52:39,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536384414] [2023-12-02 15:52:39,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536384414] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:52:39,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [531888045] [2023-12-02 15:52:39,687 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 15:52:39,687 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:52:39,691 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:52:39,696 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:52:39,697 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:52:40,155 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:52:40,215 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:52:40,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [531888045] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:52:40,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:52:40,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 13 [2023-12-02 15:52:40,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463062957] [2023-12-02 15:52:40,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:52:40,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:52:40,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:52:40,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:52:40,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-12-02 15:52:40,796 INFO L87 Difference]: Start difference. First operand 95 states and 116 transitions. Second operand has 8 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:52:41,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:52:41,027 INFO L93 Difference]: Finished difference Result 99 states and 118 transitions. [2023-12-02 15:52:41,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:52:41,028 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2023-12-02 15:52:41,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:52:41,029 INFO L225 Difference]: With dead ends: 99 [2023-12-02 15:52:41,029 INFO L226 Difference]: Without dead ends: 97 [2023-12-02 15:52:41,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-12-02 15:52:41,030 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 132 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:52:41,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 33 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:52:41,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-12-02 15:52:41,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2023-12-02 15:52:41,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 86 states have internal predecessors, (102), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 15:52:41,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2023-12-02 15:52:41,047 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 14 [2023-12-02 15:52:41,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:52:41,047 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2023-12-02 15:52:41,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:52:41,047 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2023-12-02 15:52:41,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 15:52:41,048 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:52:41,048 INFO L195 NwaCegarLoop]: trace histogram [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 15:52:41,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 15:52:41,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:52:41,249 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:52:41,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:52:41,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1837019302, now seen corresponding path program 1 times [2023-12-02 15:52:41,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:52:41,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973463435] [2023-12-02 15:52:41,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:52:41,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:52:41,259 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:52:41,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1837896737] [2023-12-02 15:52:41,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:52:41,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:52:41,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:52:41,261 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:52:41,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 15:52:41,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:52:41,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:52:41,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:52:41,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:52:41,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:52:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:52:41,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:52:41,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973463435] [2023-12-02 15:52:41,402 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:52:41,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837896737] [2023-12-02 15:52:41,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837896737] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:52:41,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1238860811] [2023-12-02 15:52:41,405 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 15:52:41,405 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:52:41,406 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:52:41,406 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:52:41,406 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:52:41,750 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-12-02 15:52:41,787 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:52:41,826 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:52:42,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1238860811] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:52:42,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:52:42,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [4, 4] total 17 [2023-12-02 15:52:42,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376263073] [2023-12-02 15:52:42,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:52:42,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 15:52:42,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:52:42,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 15:52:42,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-12-02 15:52:42,862 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand has 13 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 15:52:43,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:52:43,197 INFO L93 Difference]: Finished difference Result 103 states and 121 transitions. [2023-12-02 15:52:43,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 15:52:43,198 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2023-12-02 15:52:43,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:52:43,199 INFO L225 Difference]: With dead ends: 103 [2023-12-02 15:52:43,199 INFO L226 Difference]: Without dead ends: 101 [2023-12-02 15:52:43,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-12-02 15:52:43,200 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 93 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:52:43,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 43 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:52:43,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-12-02 15:52:43,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2023-12-02 15:52:43,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 75 states have (on average 1.4) internal successors, (105), 89 states have internal predecessors, (105), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 15:52:43,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2023-12-02 15:52:43,215 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 25 [2023-12-02 15:52:43,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:52:43,216 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2023-12-02 15:52:43,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 15:52:43,216 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2023-12-02 15:52:43,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 15:52:43,217 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:52:43,217 INFO L195 NwaCegarLoop]: trace histogram [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 15:52:43,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 15:52:43,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:52:43,422 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:52:43,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:52:43,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1836711462, now seen corresponding path program 1 times [2023-12-02 15:52:43,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:52:43,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550735460] [2023-12-02 15:52:43,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:52:43,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:52:43,434 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:52:43,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1039094294] [2023-12-02 15:52:43,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:52:43,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:52:43,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:52:43,435 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:52:43,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 15:52:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:52:43,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:52:43,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:52:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:52:43,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:52:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:52:43,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:52:43,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550735460] [2023-12-02 15:52:43,557 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:52:43,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039094294] [2023-12-02 15:52:43,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039094294] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:52:43,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [657729460] [2023-12-02 15:52:43,560 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 15:52:43,560 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:52:43,561 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:52:43,561 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:52:43,561 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:52:43,799 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-12-02 15:52:43,805 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:52:43,842 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:52:44,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [657729460] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:52:44,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:52:44,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [4, 4] total 17 [2023-12-02 15:52:44,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327625682] [2023-12-02 15:52:44,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:52:44,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 15:52:44,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:52:44,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 15:52:44,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-12-02 15:52:44,659 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand has 13 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 15:52:45,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:52:45,040 INFO L93 Difference]: Finished difference Result 105 states and 123 transitions. [2023-12-02 15:52:45,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 15:52:45,040 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2023-12-02 15:52:45,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:52:45,041 INFO L225 Difference]: With dead ends: 105 [2023-12-02 15:52:45,041 INFO L226 Difference]: Without dead ends: 103 [2023-12-02 15:52:45,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-12-02 15:52:45,043 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 47 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:52:45,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 54 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 15:52:45,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-12-02 15:52:45,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-12-02 15:52:45,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 79 states have (on average 1.379746835443038) internal successors, (109), 93 states have internal predecessors, (109), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 15:52:45,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2023-12-02 15:52:45,053 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 25 [2023-12-02 15:52:45,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:52:45,054 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2023-12-02 15:52:45,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 15:52:45,054 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2023-12-02 15:52:45,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 15:52:45,055 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:52:45,055 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:52:45,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 15:52:45,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 15:52:45,258 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:52:45,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:52:45,259 INFO L85 PathProgramCache]: Analyzing trace with hash -412111191, now seen corresponding path program 1 times [2023-12-02 15:52:45,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:52:45,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529677228] [2023-12-02 15:52:45,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:52:45,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:52:45,267 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:52:45,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [614470403] [2023-12-02 15:52:45,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:52:45,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:52:45,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:52:45,268 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:52:45,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 15:52:45,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:52:45,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 15:52:45,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:52:45,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:52:45,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:52:45,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:52:45,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529677228] [2023-12-02 15:52:45,547 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:52:45,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614470403] [2023-12-02 15:52:45,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614470403] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:52:45,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1272623830] [2023-12-02 15:52:45,550 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 15:52:45,550 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:52:45,550 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:52:45,551 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:52:45,551 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:52:46,692 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 15:52:46,705 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:52:46,734 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:52:47,836 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2127#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= (+ 2147483649 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)) 0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y1~0#1| 2147483647) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 15:52:47,836 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:52:47,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:52:47,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2023-12-02 15:52:47,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157540482] [2023-12-02 15:52:47,836 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 15:52:47,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:52:47,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:52:47,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:52:47,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2023-12-02 15:52:47,838 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 15:52:47,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:52:47,944 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2023-12-02 15:52:47,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:52:47,945 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2023-12-02 15:52:47,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:52:47,945 INFO L225 Difference]: With dead ends: 113 [2023-12-02 15:52:47,946 INFO L226 Difference]: Without dead ends: 111 [2023-12-02 15:52:47,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2023-12-02 15:52:47,947 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 58 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:52:47,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 57 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:52:47,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-12-02 15:52:47,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 101. [2023-12-02 15:52:47,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 79 states have (on average 1.3544303797468353) internal successors, (107), 91 states have internal predecessors, (107), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 15:52:47,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2023-12-02 15:52:47,960 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 28 [2023-12-02 15:52:47,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:52:47,960 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2023-12-02 15:52:47,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 15:52:47,961 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2023-12-02 15:52:47,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 15:52:47,962 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:52:47,962 INFO L195 NwaCegarLoop]: trace histogram [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 15:52:47,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 15:52:48,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 15:52:48,163 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:52:48,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:52:48,163 INFO L85 PathProgramCache]: Analyzing trace with hash 109455015, now seen corresponding path program 1 times [2023-12-02 15:52:48,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:52:48,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081004851] [2023-12-02 15:52:48,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:52:48,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:52:48,172 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:52:48,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1370645912] [2023-12-02 15:52:48,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:52:48,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:52:48,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:52:48,173 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:52:48,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 15:52:48,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:52:48,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 15:52:48,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:52:48,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:52:48,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:52:48,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:52:48,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081004851] [2023-12-02 15:52:48,417 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:52:48,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370645912] [2023-12-02 15:52:48,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370645912] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:52:48,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1365689653] [2023-12-02 15:52:48,420 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 15:52:48,420 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:52:48,420 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:52:48,420 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:52:48,420 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:52:49,325 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 15:52:49,337 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:52:49,358 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:52:51,464 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2519#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= |ULTIMATE.start_main_~y1~0#1| 2147483647) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 15:52:51,464 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:52:51,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:52:51,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2023-12-02 15:52:51,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523292272] [2023-12-02 15:52:51,465 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 15:52:51,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:52:51,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:52:51,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:52:51,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2023-12-02 15:52:51,466 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 15:52:51,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:52:51,583 INFO L93 Difference]: Finished difference Result 162 states and 179 transitions. [2023-12-02 15:52:51,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:52:51,583 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-12-02 15:52:51,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:52:51,585 INFO L225 Difference]: With dead ends: 162 [2023-12-02 15:52:51,585 INFO L226 Difference]: Without dead ends: 159 [2023-12-02 15:52:51,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2023-12-02 15:52:51,586 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 85 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:52:51,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 89 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:52:51,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-12-02 15:52:51,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 135. [2023-12-02 15:52:51,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 111 states have (on average 1.3783783783783783) internal successors, (153), 123 states have internal predecessors, (153), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 15:52:51,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 169 transitions. [2023-12-02 15:52:51,596 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 169 transitions. Word has length 29 [2023-12-02 15:52:51,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:52:51,596 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 169 transitions. [2023-12-02 15:52:51,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 15:52:51,596 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 169 transitions. [2023-12-02 15:52:51,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 15:52:51,597 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:52:51,597 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:52:51,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-02 15:52:51,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:52:51,798 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:52:51,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:52:51,798 INFO L85 PathProgramCache]: Analyzing trace with hash 66873311, now seen corresponding path program 1 times [2023-12-02 15:52:51,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:52:51,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942588852] [2023-12-02 15:52:51,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:52:51,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:52:51,804 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:52:51,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295031814] [2023-12-02 15:52:51,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:52:51,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:52:51,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:52:51,805 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:52:51,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 15:52:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:52:51,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 15:52:51,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:52:51,908 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:52:51,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:52:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:52:51,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:52:51,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942588852] [2023-12-02 15:52:51,992 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:52:51,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295031814] [2023-12-02 15:52:51,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295031814] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:52:51,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1067679267] [2023-12-02 15:52:51,994 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 15:52:51,995 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:52:51,995 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:52:51,995 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:52:51,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:52:52,845 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 15:52:52,853 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:52:52,876 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:52:53,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1067679267] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:52:53,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:52:53,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [7, 7] total 24 [2023-12-02 15:52:53,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012012690] [2023-12-02 15:52:53,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:52:53,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 15:52:53,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:52:53,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 15:52:53,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2023-12-02 15:52:53,797 INFO L87 Difference]: Start difference. First operand 135 states and 169 transitions. Second operand has 18 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 15:52:55,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:52:55,263 INFO L93 Difference]: Finished difference Result 147 states and 173 transitions. [2023-12-02 15:52:55,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 15:52:55,264 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2023-12-02 15:52:55,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:52:55,265 INFO L225 Difference]: With dead ends: 147 [2023-12-02 15:52:55,265 INFO L226 Difference]: Without dead ends: 137 [2023-12-02 15:52:55,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=244, Invalid=878, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 15:52:55,266 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 169 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:52:55,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 64 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 15:52:55,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-12-02 15:52:55,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 131. [2023-12-02 15:52:55,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 107 states have (on average 1.3364485981308412) internal successors, (143), 119 states have internal predecessors, (143), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 15:52:55,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 159 transitions. [2023-12-02 15:52:55,281 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 159 transitions. Word has length 31 [2023-12-02 15:52:55,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:52:55,281 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 159 transitions. [2023-12-02 15:52:55,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 15:52:55,281 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 159 transitions. [2023-12-02 15:52:55,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 15:52:55,282 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:52:55,282 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:52:55,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 15:52:55,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 15:52:55,483 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:52:55,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:52:55,483 INFO L85 PathProgramCache]: Analyzing trace with hash 894223917, now seen corresponding path program 1 times [2023-12-02 15:52:55,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:52:55,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703950351] [2023-12-02 15:52:55,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:52:55,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:52:55,490 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:52:55,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1368721295] [2023-12-02 15:52:55,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:52:55,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:52:55,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:52:55,491 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:52:55,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 15:52:55,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:52:55,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 15:52:55,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:52:55,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:52:55,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:52:55,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:52:55,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:52:55,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703950351] [2023-12-02 15:52:55,776 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:52:55,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368721295] [2023-12-02 15:52:55,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368721295] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:52:55,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1415880796] [2023-12-02 15:52:55,778 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 15:52:55,779 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:52:55,779 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:52:55,779 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:52:55,779 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:52:56,496 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 15:52:56,504 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:52:56,523 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:52:57,991 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3604#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= (+ 2147483649 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y3~0#1|) 0) (<= 0 (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) 2147483648)) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= |ULTIMATE.start_main_~y1~0#1| 2147483647) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 15:52:57,992 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:52:57,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:52:57,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-12-02 15:52:57,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252601545] [2023-12-02 15:52:57,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:52:57,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 15:52:57,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:52:57,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 15:52:57,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2023-12-02 15:52:57,994 INFO L87 Difference]: Start difference. First operand 131 states and 159 transitions. Second operand has 12 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 15:52:58,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:52:58,163 INFO L93 Difference]: Finished difference Result 131 states and 159 transitions. [2023-12-02 15:52:58,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:52:58,164 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2023-12-02 15:52:58,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:52:58,165 INFO L225 Difference]: With dead ends: 131 [2023-12-02 15:52:58,165 INFO L226 Difference]: Without dead ends: 128 [2023-12-02 15:52:58,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=176, Invalid=1014, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 15:52:58,166 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 133 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:52:58,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 29 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:52:58,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-12-02 15:52:58,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2023-12-02 15:52:58,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 107 states have (on average 1.2616822429906542) internal successors, (135), 116 states have internal predecessors, (135), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 15:52:58,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 151 transitions. [2023-12-02 15:52:58,183 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 151 transitions. Word has length 32 [2023-12-02 15:52:58,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:52:58,184 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 151 transitions. [2023-12-02 15:52:58,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 15:52:58,184 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 151 transitions. [2023-12-02 15:52:58,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 15:52:58,185 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:52:58,185 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:52:58,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 15:52:58,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:52:58,386 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:52:58,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:52:58,386 INFO L85 PathProgramCache]: Analyzing trace with hash -159255839, now seen corresponding path program 1 times [2023-12-02 15:52:58,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:52:58,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64263890] [2023-12-02 15:52:58,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:52:58,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:52:58,392 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:52:58,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651861503] [2023-12-02 15:52:58,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:52:58,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:52:58,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:52:58,394 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:52:58,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 15:52:58,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:52:58,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:52:58,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:52:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:52:58,471 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:52:58,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:52:58,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64263890] [2023-12-02 15:52:58,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:52:58,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651861503] [2023-12-02 15:52:58,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651861503] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:52:58,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:52:58,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:52:58,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347410607] [2023-12-02 15:52:58,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:52:58,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:52:58,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:52:58,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:52:58,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:52:58,473 INFO L87 Difference]: Start difference. First operand 128 states and 151 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 15:52:58,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:52:58,605 INFO L93 Difference]: Finished difference Result 130 states and 151 transitions. [2023-12-02 15:52:58,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:52:58,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2023-12-02 15:52:58,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:52:58,607 INFO L225 Difference]: With dead ends: 130 [2023-12-02 15:52:58,607 INFO L226 Difference]: Without dead ends: 129 [2023-12-02 15:52:58,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 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 15:52:58,608 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:52:58,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 32 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:52:58,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-12-02 15:52:58,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2023-12-02 15:52:58,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 107 states have (on average 1.233644859813084) internal successors, (132), 116 states have internal predecessors, (132), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 15:52:58,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 148 transitions. [2023-12-02 15:52:58,622 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 148 transitions. Word has length 33 [2023-12-02 15:52:58,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:52:58,622 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 148 transitions. [2023-12-02 15:52:58,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 15:52:58,623 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 148 transitions. [2023-12-02 15:52:58,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 15:52:58,623 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:52:58,623 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:52:58,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 15:52:58,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:52:58,824 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:52:58,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:52:58,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1951137707, now seen corresponding path program 1 times [2023-12-02 15:52:58,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:52:58,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009830595] [2023-12-02 15:52:58,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:52:58,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:52:58,831 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:52:58,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051446556] [2023-12-02 15:52:58,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:52:58,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:52:58,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:52:58,833 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:52:58,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 15:52:58,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:52:58,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 15:52:58,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:52:58,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:52:58,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:52:59,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:52:59,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:52:59,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009830595] [2023-12-02 15:52:59,062 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:52:59,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051446556] [2023-12-02 15:52:59,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051446556] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:52:59,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [40138431] [2023-12-02 15:52:59,064 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 15:52:59,064 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:52:59,065 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:52:59,065 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:52:59,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:52:59,710 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 15:52:59,719 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:52:59,738 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:53:01,346 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4519#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= 2147483648 (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y3~0#1|)) (<= (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 15:53:01,346 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:53:01,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:53:01,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-12-02 15:53:01,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330530691] [2023-12-02 15:53:01,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:53:01,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 15:53:01,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:53:01,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 15:53:01,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2023-12-02 15:53:01,348 INFO L87 Difference]: Start difference. First operand 128 states and 148 transitions. Second operand has 11 states, 10 states have (on average 4.9) internal successors, (49), 11 states have internal predecessors, (49), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 15:53:01,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:53:01,684 INFO L93 Difference]: Finished difference Result 171 states and 196 transitions. [2023-12-02 15:53:01,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 15:53:01,685 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 11 states have internal predecessors, (49), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2023-12-02 15:53:01,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:53:01,686 INFO L225 Difference]: With dead ends: 171 [2023-12-02 15:53:01,686 INFO L226 Difference]: Without dead ends: 170 [2023-12-02 15:53:01,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 15:53:01,687 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 169 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:53:01,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 46 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:53:01,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-12-02 15:53:01,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 127. [2023-12-02 15:53:01,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 107 states have (on average 1.2149532710280373) internal successors, (130), 115 states have internal predecessors, (130), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 15:53:01,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 146 transitions. [2023-12-02 15:53:01,698 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 146 transitions. Word has length 33 [2023-12-02 15:53:01,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:53:01,698 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 146 transitions. [2023-12-02 15:53:01,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 11 states have internal predecessors, (49), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 15:53:01,698 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 146 transitions. [2023-12-02 15:53:01,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 15:53:01,699 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:53:01,699 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:53:01,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 15:53:01,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 15:53:01,900 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:53:01,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:53:01,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1479578058, now seen corresponding path program 1 times [2023-12-02 15:53:01,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:53:01,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481469938] [2023-12-02 15:53:01,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:53:01,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:53:01,906 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:53:01,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557917649] [2023-12-02 15:53:01,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:53:01,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:53:01,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:53:01,908 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:53:01,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 15:53:01,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:53:01,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 15:53:01,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:53:01,970 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 15:53:01,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:53:02,001 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 15:53:02,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:53:02,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481469938] [2023-12-02 15:53:02,001 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:53:02,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557917649] [2023-12-02 15:53:02,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557917649] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:53:02,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1129784160] [2023-12-02 15:53:02,003 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 15:53:02,003 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:53:02,003 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:53:02,004 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:53:02,004 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:53:02,681 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 15:53:02,687 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:53:02,705 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:53:03,575 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5126#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= 2147483647 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y1~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 15:53:03,575 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:53:03,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:53:03,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-12-02 15:53:03,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785248532] [2023-12-02 15:53:03,575 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:53:03,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:53:03,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:53:03,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:53:03,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2023-12-02 15:53:03,577 INFO L87 Difference]: Start difference. First operand 127 states and 146 transitions. Second operand has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 15:53:03,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:53:03,658 INFO L93 Difference]: Finished difference Result 318 states and 372 transitions. [2023-12-02 15:53:03,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:53:03,658 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 39 [2023-12-02 15:53:03,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:53:03,660 INFO L225 Difference]: With dead ends: 318 [2023-12-02 15:53:03,660 INFO L226 Difference]: Without dead ends: 316 [2023-12-02 15:53:03,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2023-12-02 15:53:03,661 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 70 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:53:03,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 91 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:53:03,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-12-02 15:53:03,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 263. [2023-12-02 15:53:03,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 235 states have (on average 1.2042553191489362) internal successors, (283), 242 states have internal predecessors, (283), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-02 15:53:03,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 317 transitions. [2023-12-02 15:53:03,683 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 317 transitions. Word has length 39 [2023-12-02 15:53:03,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:53:03,683 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 317 transitions. [2023-12-02 15:53:03,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 15:53:03,684 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 317 transitions. [2023-12-02 15:53:03,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 15:53:03,684 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:53:03,684 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:53:03,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 15:53:03,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:53:03,885 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:53:03,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:53:03,885 INFO L85 PathProgramCache]: Analyzing trace with hash 287486975, now seen corresponding path program 1 times [2023-12-02 15:53:03,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:53:03,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17595638] [2023-12-02 15:53:03,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:53:03,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:53:03,892 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:53:03,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946085989] [2023-12-02 15:53:03,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:53:03,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:53:03,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:53:03,894 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:53:03,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 15:53:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:53:03,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 15:53:03,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:53:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 15:53:03,950 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:53:03,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:53:03,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17595638] [2023-12-02 15:53:03,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:53:03,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946085989] [2023-12-02 15:53:03,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946085989] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:53:03,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:53:03,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 15:53:03,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111300594] [2023-12-02 15:53:03,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:53:03,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:53:03,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:53:03,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:53:03,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:53:03,952 INFO L87 Difference]: Start difference. First operand 263 states and 317 transitions. Second operand has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 15:53:03,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:53:03,989 INFO L93 Difference]: Finished difference Result 263 states and 317 transitions. [2023-12-02 15:53:03,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:53:03,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2023-12-02 15:53:03,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:53:03,991 INFO L225 Difference]: With dead ends: 263 [2023-12-02 15:53:03,991 INFO L226 Difference]: Without dead ends: 261 [2023-12-02 15:53:03,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 42 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 15:53:03,992 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 14 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:53:03,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 71 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:53:03,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-12-02 15:53:04,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 257. [2023-12-02 15:53:04,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 231 states have (on average 1.1645021645021645) internal successors, (269), 236 states have internal predecessors, (269), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-02 15:53:04,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 303 transitions. [2023-12-02 15:53:04,014 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 303 transitions. Word has length 44 [2023-12-02 15:53:04,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:53:04,014 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 303 transitions. [2023-12-02 15:53:04,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 15:53:04,014 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 303 transitions. [2023-12-02 15:53:04,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 15:53:04,015 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:53:04,015 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:53:04,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 15:53:04,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 15:53:04,216 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:53:04,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:53:04,216 INFO L85 PathProgramCache]: Analyzing trace with hash -640162343, now seen corresponding path program 2 times [2023-12-02 15:53:04,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:53:04,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478672246] [2023-12-02 15:53:04,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:53:04,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:53:04,227 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:53:04,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [645810143] [2023-12-02 15:53:04,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:53:04,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:53:04,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:53:04,228 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:53:04,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 15:53:04,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 15:53:04,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:53:04,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 15:53:04,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:53:04,582 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 15:53:04,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:53:04,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:53:04,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478672246] [2023-12-02 15:53:04,685 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:53:04,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645810143] [2023-12-02 15:53:04,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645810143] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:53:04,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1673973283] [2023-12-02 15:53:04,688 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 15:53:04,688 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:53:04,688 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:53:04,688 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:53:04,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:53:05,321 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 15:53:05,330 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:53:05,349 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:53:07,391 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6699#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= |ULTIMATE.start_main_~y1~0#1| 2147483647) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 15:53:07,391 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:53:07,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:53:07,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2023-12-02 15:53:07,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836127875] [2023-12-02 15:53:07,392 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 15:53:07,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:53:07,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:53:07,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:53:07,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2023-12-02 15:53:07,393 INFO L87 Difference]: Start difference. First operand 257 states and 303 transitions. Second operand has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 15:53:07,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:53:07,544 INFO L93 Difference]: Finished difference Result 520 states and 623 transitions. [2023-12-02 15:53:07,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:53:07,545 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 47 [2023-12-02 15:53:07,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:53:07,547 INFO L225 Difference]: With dead ends: 520 [2023-12-02 15:53:07,547 INFO L226 Difference]: Without dead ends: 362 [2023-12-02 15:53:07,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2023-12-02 15:53:07,549 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 60 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:53:07,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 86 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:53:07,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2023-12-02 15:53:07,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 289. [2023-12-02 15:53:07,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 261 states have (on average 1.1494252873563218) internal successors, (300), 266 states have internal predecessors, (300), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-12-02 15:53:07,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 338 transitions. [2023-12-02 15:53:07,574 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 338 transitions. Word has length 47 [2023-12-02 15:53:07,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:53:07,574 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 338 transitions. [2023-12-02 15:53:07,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 15:53:07,575 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 338 transitions. [2023-12-02 15:53:07,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-02 15:53:07,575 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:53:07,575 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:53:07,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 15:53:07,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 15:53:07,776 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:53:07,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:53:07,776 INFO L85 PathProgramCache]: Analyzing trace with hash 622787723, now seen corresponding path program 3 times [2023-12-02 15:53:07,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:53:07,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408642021] [2023-12-02 15:53:07,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:53:07,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:53:07,783 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:53:07,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980396300] [2023-12-02 15:53:07,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:53:07,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:53:07,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:53:07,784 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:53:07,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 15:53:07,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:53:07,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:53:07,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:53:07,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:53:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 15:53:07,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:53:08,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:53:08,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408642021] [2023-12-02 15:53:08,301 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:53:08,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980396300] [2023-12-02 15:53:08,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980396300] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:53:08,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [518944086] [2023-12-02 15:53:08,303 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 15:53:08,304 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:53:08,304 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:53:08,304 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:53:08,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:53:08,924 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 15:53:08,933 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:53:08,960 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:53:11,144 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7873#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= |ULTIMATE.start_main_~y1~0#1| 2147483647) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 15:53:11,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:53:11,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:53:11,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2023-12-02 15:53:11,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378547517] [2023-12-02 15:53:11,144 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 15:53:11,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:53:11,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:53:11,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:53:11,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2023-12-02 15:53:11,146 INFO L87 Difference]: Start difference. First operand 289 states and 338 transitions. Second operand has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 15:53:11,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:53:11,239 INFO L93 Difference]: Finished difference Result 472 states and 557 transitions. [2023-12-02 15:53:11,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:53:11,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 65 [2023-12-02 15:53:11,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:53:11,241 INFO L225 Difference]: With dead ends: 472 [2023-12-02 15:53:11,241 INFO L226 Difference]: Without dead ends: 314 [2023-12-02 15:53:11,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2023-12-02 15:53:11,243 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 24 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:53:11,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 69 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:53:11,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2023-12-02 15:53:11,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 307. [2023-12-02 15:53:11,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 278 states have (on average 1.1402877697841727) internal successors, (317), 283 states have internal predecessors, (317), 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 15:53:11,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 357 transitions. [2023-12-02 15:53:11,269 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 357 transitions. Word has length 65 [2023-12-02 15:53:11,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:53:11,270 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 357 transitions. [2023-12-02 15:53:11,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 15:53:11,270 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 357 transitions. [2023-12-02 15:53:11,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-02 15:53:11,271 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:53:11,271 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:53:11,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 15:53:11,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 15:53:11,471 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:53:11,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:53:11,472 INFO L85 PathProgramCache]: Analyzing trace with hash 73988729, now seen corresponding path program 1 times [2023-12-02 15:53:11,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:53:11,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829211492] [2023-12-02 15:53:11,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:53:11,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:53:11,479 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:53:11,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534698031] [2023-12-02 15:53:11,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:53:11,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:53:11,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:53:11,480 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:53:11,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 15:53:11,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:53:11,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 15:53:11,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:53:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 15:53:11,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:53:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 15:53:11,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:53:11,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829211492] [2023-12-02 15:53:11,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:53:11,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534698031] [2023-12-02 15:53:11,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534698031] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:53:11,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [333645225] [2023-12-02 15:53:11,765 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 15:53:11,765 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:53:11,766 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:53:11,766 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:53:11,766 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:53:12,686 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 15:53:12,697 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:53:12,718 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:53:14,679 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9185#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y2~0#1|)))' at error location [2023-12-02 15:53:14,680 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:53:14,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:53:14,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-12-02 15:53:14,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624316715] [2023-12-02 15:53:14,680 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:53:14,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 15:53:14,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:53:14,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 15:53:14,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 15:53:14,682 INFO L87 Difference]: Start difference. First operand 307 states and 357 transitions. Second operand has 13 states, 11 states have (on average 9.636363636363637) internal successors, (106), 13 states have internal predecessors, (106), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 15:53:15,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:53:15,262 INFO L93 Difference]: Finished difference Result 772 states and 881 transitions. [2023-12-02 15:53:15,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-02 15:53:15,263 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 9.636363636363637) internal successors, (106), 13 states have internal predecessors, (106), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 67 [2023-12-02 15:53:15,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:53:15,266 INFO L225 Difference]: With dead ends: 772 [2023-12-02 15:53:15,266 INFO L226 Difference]: Without dead ends: 754 [2023-12-02 15:53:15,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 161 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=356, Invalid=2194, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 15:53:15,267 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 183 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:53:15,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 83 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:53:15,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2023-12-02 15:53:15,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 581. [2023-12-02 15:53:15,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 539 states have (on average 1.103896103896104) internal successors, (595), 543 states have internal predecessors, (595), 34 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-12-02 15:53:15,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 663 transitions. [2023-12-02 15:53:15,314 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 663 transitions. Word has length 67 [2023-12-02 15:53:15,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:53:15,314 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 663 transitions. [2023-12-02 15:53:15,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 9.636363636363637) internal successors, (106), 13 states have internal predecessors, (106), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 15:53:15,315 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 663 transitions. [2023-12-02 15:53:15,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-02 15:53:15,316 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:53:15,316 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:53:15,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 15:53:15,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 15:53:15,517 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:53:15,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:53:15,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1602109679, now seen corresponding path program 1 times [2023-12-02 15:53:15,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:53:15,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554798343] [2023-12-02 15:53:15,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:53:15,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:53:15,526 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:53:15,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2120276489] [2023-12-02 15:53:15,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:53:15,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:53:15,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:53:15,528 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:53:15,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 15:53:15,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:53:15,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 15:53:15,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:53:15,668 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 15:53:15,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:53:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 15:53:15,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:53:15,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554798343] [2023-12-02 15:53:15,751 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:53:15,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120276489] [2023-12-02 15:53:15,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120276489] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:53:15,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1708071605] [2023-12-02 15:53:15,752 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 15:53:15,753 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:53:15,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:53:15,753 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:53:15,753 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:53:16,380 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 15:53:16,388 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:53:16,407 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:53:17,914 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11230#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~x2~0#1| 1) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483647 |ULTIMATE.start_main_~y1~0#1|))' at error location [2023-12-02 15:53:17,914 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:53:17,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:53:17,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-12-02 15:53:17,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571574248] [2023-12-02 15:53:17,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:53:17,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 15:53:17,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:53:17,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 15:53:17,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2023-12-02 15:53:17,916 INFO L87 Difference]: Start difference. First operand 581 states and 663 transitions. Second operand has 10 states, 9 states have (on average 13.444444444444445) internal successors, (121), 10 states have internal predecessors, (121), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-02 15:53:18,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:53:18,446 INFO L93 Difference]: Finished difference Result 1177 states and 1386 transitions. [2023-12-02 15:53:18,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 15:53:18,447 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 13.444444444444445) internal successors, (121), 10 states have internal predecessors, (121), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 78 [2023-12-02 15:53:18,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:53:18,451 INFO L225 Difference]: With dead ends: 1177 [2023-12-02 15:53:18,451 INFO L226 Difference]: Without dead ends: 1176 [2023-12-02 15:53:18,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2023-12-02 15:53:18,453 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 131 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:53:18,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 149 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 15:53:18,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2023-12-02 15:53:18,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1135. [2023-12-02 15:53:18,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1058 states have (on average 1.1550094517958411) internal successors, (1222), 1062 states have internal predecessors, (1222), 69 states have call successors, (69), 3 states have call predecessors, (69), 3 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2023-12-02 15:53:18,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1360 transitions. [2023-12-02 15:53:18,592 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1360 transitions. Word has length 78 [2023-12-02 15:53:18,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:53:18,592 INFO L495 AbstractCegarLoop]: Abstraction has 1135 states and 1360 transitions. [2023-12-02 15:53:18,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 13.444444444444445) internal successors, (121), 10 states have internal predecessors, (121), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-02 15:53:18,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1360 transitions. [2023-12-02 15:53:18,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-02 15:53:18,594 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:53:18,594 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:53:18,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-02 15:53:18,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:53:18,795 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:53:18,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:53:18,795 INFO L85 PathProgramCache]: Analyzing trace with hash 615063849, now seen corresponding path program 1 times [2023-12-02 15:53:18,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:53:18,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90170532] [2023-12-02 15:53:18,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:53:18,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:53:18,801 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:53:18,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [178567737] [2023-12-02 15:53:18,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:53:18,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:53:18,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:53:18,802 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:53:18,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 15:53:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:53:18,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 15:53:18,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:53:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 15:53:19,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:53:19,192 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 15:53:19,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:53:19,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90170532] [2023-12-02 15:53:19,193 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:53:19,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178567737] [2023-12-02 15:53:19,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178567737] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:53:19,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1618627485] [2023-12-02 15:53:19,194 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 15:53:19,195 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:53:19,195 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:53:19,195 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:53:19,195 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:53:20,003 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 15:53:20,013 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:53:20,032 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:53:22,218 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14355#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 15:53:22,219 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:53:22,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:53:22,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-12-02 15:53:22,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391090165] [2023-12-02 15:53:22,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:53:22,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 15:53:22,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:53:22,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 15:53:22,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 15:53:22,220 INFO L87 Difference]: Start difference. First operand 1135 states and 1360 transitions. Second operand has 12 states, 11 states have (on average 10.090909090909092) internal successors, (111), 12 states have internal predecessors, (111), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 15:53:23,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:53:23,373 INFO L93 Difference]: Finished difference Result 1571 states and 1876 transitions. [2023-12-02 15:53:23,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 15:53:23,373 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 10.090909090909092) internal successors, (111), 12 states have internal predecessors, (111), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 83 [2023-12-02 15:53:23,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:53:23,379 INFO L225 Difference]: With dead ends: 1571 [2023-12-02 15:53:23,379 INFO L226 Difference]: Without dead ends: 1556 [2023-12-02 15:53:23,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 210 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=285, Invalid=1971, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 15:53:23,381 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 222 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:53:23,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 262 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:53:23,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2023-12-02 15:53:23,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1437. [2023-12-02 15:53:23,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1342 states have (on average 1.1013412816691506) internal successors, (1478), 1345 states have internal predecessors, (1478), 88 states have call successors, (88), 3 states have call predecessors, (88), 3 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2023-12-02 15:53:23,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 1654 transitions. [2023-12-02 15:53:23,526 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 1654 transitions. Word has length 83 [2023-12-02 15:53:23,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:53:23,527 INFO L495 AbstractCegarLoop]: Abstraction has 1437 states and 1654 transitions. [2023-12-02 15:53:23,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 10.090909090909092) internal successors, (111), 12 states have internal predecessors, (111), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 15:53:23,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 1654 transitions. [2023-12-02 15:53:23,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-02 15:53:23,528 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:53:23,529 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:53:23,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 15:53:23,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:53:23,729 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:53:23,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:53:23,730 INFO L85 PathProgramCache]: Analyzing trace with hash 241787266, now seen corresponding path program 2 times [2023-12-02 15:53:23,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:53:23,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118589608] [2023-12-02 15:53:23,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:53:23,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:53:23,739 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:53:23,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102629227] [2023-12-02 15:53:23,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:53:23,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:53:23,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:53:23,741 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:53:23,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 15:53:23,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 15:53:23,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:53:23,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 15:53:23,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:53:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 15:53:23,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:53:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 15:53:23,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:53:23,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118589608] [2023-12-02 15:53:23,977 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:53:23,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102629227] [2023-12-02 15:53:23,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102629227] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:53:23,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1399834862] [2023-12-02 15:53:23,978 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 15:53:23,979 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:53:23,979 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:53:23,979 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:53:23,979 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:53:24,624 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 15:53:24,630 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:53:24,649 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:53:25,599 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18358#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= 2147483647 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y1~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 15:53:25,599 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:53:25,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:53:25,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-12-02 15:53:25,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754527210] [2023-12-02 15:53:25,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:53:25,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 15:53:25,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:53:25,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 15:53:25,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2023-12-02 15:53:25,601 INFO L87 Difference]: Start difference. First operand 1437 states and 1654 transitions. Second operand has 12 states, 11 states have (on average 13.181818181818182) internal successors, (145), 12 states have internal predecessors, (145), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-12-02 15:53:25,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:53:25,910 INFO L93 Difference]: Finished difference Result 2987 states and 3517 transitions. [2023-12-02 15:53:25,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 15:53:25,911 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 13.181818181818182) internal successors, (145), 12 states have internal predecessors, (145), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 93 [2023-12-02 15:53:25,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:53:25,922 INFO L225 Difference]: With dead ends: 2987 [2023-12-02 15:53:25,922 INFO L226 Difference]: Without dead ends: 2986 [2023-12-02 15:53:25,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 245 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2023-12-02 15:53:25,923 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 71 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:53:25,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 129 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:53:25,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2986 states. [2023-12-02 15:53:26,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2986 to 2754. [2023-12-02 15:53:26,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2754 states, 2576 states have (on average 1.1137422360248448) internal successors, (2869), 2579 states have internal predecessors, (2869), 171 states have call successors, (171), 3 states have call predecessors, (171), 3 states have return successors, (171), 171 states have call predecessors, (171), 171 states have call successors, (171) [2023-12-02 15:53:26,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2754 states to 2754 states and 3211 transitions. [2023-12-02 15:53:26,200 INFO L78 Accepts]: Start accepts. Automaton has 2754 states and 3211 transitions. Word has length 93 [2023-12-02 15:53:26,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:53:26,201 INFO L495 AbstractCegarLoop]: Abstraction has 2754 states and 3211 transitions. [2023-12-02 15:53:26,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 13.181818181818182) internal successors, (145), 12 states have internal predecessors, (145), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-12-02 15:53:26,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2754 states and 3211 transitions. [2023-12-02 15:53:26,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 15:53:26,204 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:53:26,204 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:53:26,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-02 15:53:26,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:53:26,405 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:53:26,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:53:26,405 INFO L85 PathProgramCache]: Analyzing trace with hash -2018296607, now seen corresponding path program 2 times [2023-12-02 15:53:26,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:53:26,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343919732] [2023-12-02 15:53:26,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:53:26,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:53:26,414 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:53:26,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [323050363] [2023-12-02 15:53:26,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:53:26,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:53:26,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:53:26,415 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:53:26,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 15:53:26,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 15:53:26,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:53:26,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 15:53:26,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:53:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 173 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2023-12-02 15:53:26,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:53:26,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:53:26,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343919732] [2023-12-02 15:53:26,747 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:53:26,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323050363] [2023-12-02 15:53:26,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323050363] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:53:26,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1675174679] [2023-12-02 15:53:26,748 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 15:53:26,748 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:53:26,748 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:53:26,749 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:53:26,749 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:53:27,533 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 15:53:27,544 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:53:27,563 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:53:29,712 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25268#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 15:53:29,712 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:53:29,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:53:29,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-12-02 15:53:29,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760516336] [2023-12-02 15:53:29,712 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 15:53:29,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:53:29,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:53:29,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:53:29,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 15:53:29,714 INFO L87 Difference]: Start difference. First operand 2754 states and 3211 transitions. Second operand has 7 states, 6 states have (on average 9.5) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 15:53:30,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:53:30,079 INFO L93 Difference]: Finished difference Result 4250 states and 4961 transitions. [2023-12-02 15:53:30,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 15:53:30,079 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.5) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 137 [2023-12-02 15:53:30,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:53:30,091 INFO L225 Difference]: With dead ends: 4250 [2023-12-02 15:53:30,091 INFO L226 Difference]: Without dead ends: 2760 [2023-12-02 15:53:30,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 247 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=165, Invalid=1241, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 15:53:30,094 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 80 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:53:30,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 124 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:53:30,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2023-12-02 15:53:30,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2570. [2023-12-02 15:53:30,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2570 states, 2403 states have (on average 1.1136079900124844) internal successors, (2676), 2406 states have internal predecessors, (2676), 160 states have call successors, (160), 3 states have call predecessors, (160), 3 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2023-12-02 15:53:30,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 2996 transitions. [2023-12-02 15:53:30,281 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 2996 transitions. Word has length 137 [2023-12-02 15:53:30,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:53:30,281 INFO L495 AbstractCegarLoop]: Abstraction has 2570 states and 2996 transitions. [2023-12-02 15:53:30,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.5) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 15:53:30,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 2996 transitions. [2023-12-02 15:53:30,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 15:53:30,284 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:53:30,284 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:53:30,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-02 15:53:30,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:53:30,484 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:53:30,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:53:30,485 INFO L85 PathProgramCache]: Analyzing trace with hash -40729429, now seen corresponding path program 3 times [2023-12-02 15:53:30,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:53:30,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88138902] [2023-12-02 15:53:30,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:53:30,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:53:30,496 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:53:30,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [750837243] [2023-12-02 15:53:30,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:53:30,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:53:30,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:53:30,498 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:53:30,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-02 15:53:30,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:53:30,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:53:30,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:53:30,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:53:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 215 proven. 92 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-02 15:53:30,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:53:30,825 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 195 proven. 92 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-02 15:53:30,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:53:30,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88138902] [2023-12-02 15:53:30,826 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:53:30,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750837243] [2023-12-02 15:53:30,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750837243] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:53:30,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [535416462] [2023-12-02 15:53:30,827 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 15:53:30,827 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:53:30,828 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:53:30,828 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:53:30,828 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:53:31,634 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 15:53:31,645 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:53:31,664 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:53:34,046 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33809#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 15:53:34,046 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:53:34,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:53:34,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2023-12-02 15:53:34,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887677838] [2023-12-02 15:53:34,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:53:34,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 15:53:34,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:53:34,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 15:53:34,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 15:53:34,048 INFO L87 Difference]: Start difference. First operand 2570 states and 2996 transitions. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2023-12-02 15:53:34,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:53:34,583 INFO L93 Difference]: Finished difference Result 5158 states and 6039 transitions. [2023-12-02 15:53:34,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:53:34,583 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 137 [2023-12-02 15:53:34,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:53:34,597 INFO L225 Difference]: With dead ends: 5158 [2023-12-02 15:53:34,597 INFO L226 Difference]: Without dead ends: 3604 [2023-12-02 15:53:34,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 367 SyntacticMatches, 11 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 15:53:34,600 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 46 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:53:34,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 238 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:53:34,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3604 states. [2023-12-02 15:53:34,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3604 to 2739. [2023-12-02 15:53:34,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2561 states have (on average 1.1050370948848107) internal successors, (2830), 2564 states have internal predecessors, (2830), 171 states have call successors, (171), 3 states have call predecessors, (171), 3 states have return successors, (171), 171 states have call predecessors, (171), 171 states have call successors, (171) [2023-12-02 15:53:34,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 3172 transitions. [2023-12-02 15:53:34,806 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 3172 transitions. Word has length 137 [2023-12-02 15:53:34,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:53:34,807 INFO L495 AbstractCegarLoop]: Abstraction has 2739 states and 3172 transitions. [2023-12-02 15:53:34,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2023-12-02 15:53:34,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 3172 transitions. [2023-12-02 15:53:34,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-12-02 15:53:34,809 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:53:34,809 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:53:34,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-02 15:53:35,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:53:35,009 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:53:35,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:53:35,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1495905817, now seen corresponding path program 2 times [2023-12-02 15:53:35,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:53:35,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349566802] [2023-12-02 15:53:35,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:53:35,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:53:35,018 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:53:35,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054797650] [2023-12-02 15:53:35,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:53:35,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:53:35,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:53:35,020 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:53:35,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-02 15:53:35,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-02 15:53:35,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:53:35,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 15:53:35,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:53:35,289 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 12 proven. 74 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-12-02 15:53:35,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:53:35,539 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-12-02 15:53:35,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:53:35,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349566802] [2023-12-02 15:53:35,539 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:53:35,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054797650] [2023-12-02 15:53:35,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054797650] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:53:35,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1938691001] [2023-12-02 15:53:35,541 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 15:53:35,541 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:53:35,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:53:35,541 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:53:35,542 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:53:36,388 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 15:53:36,403 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:53:36,423 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:53:38,686 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '43570#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y2~0#1|)))' at error location [2023-12-02 15:53:38,686 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:53:38,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:53:38,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-12-02 15:53:38,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706306301] [2023-12-02 15:53:38,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:53:38,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 15:53:38,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:53:38,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 15:53:38,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 15:53:38,688 INFO L87 Difference]: Start difference. First operand 2739 states and 3172 transitions. Second operand has 10 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 15:53:39,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:53:39,057 INFO L93 Difference]: Finished difference Result 2739 states and 3172 transitions. [2023-12-02 15:53:39,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 15:53:39,057 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 139 [2023-12-02 15:53:39,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:53:39,067 INFO L225 Difference]: With dead ends: 2739 [2023-12-02 15:53:39,067 INFO L226 Difference]: Without dead ends: 2738 [2023-12-02 15:53:39,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 361 SyntacticMatches, 23 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=216, Invalid=1424, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 15:53:39,068 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 79 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:53:39,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 27 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:53:39,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2738 states. [2023-12-02 15:53:39,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2738 to 2656. [2023-12-02 15:53:39,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2656 states, 2483 states have (on average 1.058799838904551) internal successors, (2629), 2485 states have internal predecessors, (2629), 167 states have call successors, (167), 3 states have call predecessors, (167), 3 states have return successors, (167), 167 states have call predecessors, (167), 167 states have call successors, (167) [2023-12-02 15:53:39,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 2963 transitions. [2023-12-02 15:53:39,262 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 2963 transitions. Word has length 139 [2023-12-02 15:53:39,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:53:39,263 INFO L495 AbstractCegarLoop]: Abstraction has 2656 states and 2963 transitions. [2023-12-02 15:53:39,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 15:53:39,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 2963 transitions. [2023-12-02 15:53:39,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-12-02 15:53:39,266 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:53:39,266 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:53:39,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-02 15:53:39,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-02 15:53:39,466 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:53:39,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:53:39,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1033978295, now seen corresponding path program 4 times [2023-12-02 15:53:39,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:53:39,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068472100] [2023-12-02 15:53:39,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:53:39,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:53:39,477 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:53:39,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696253647] [2023-12-02 15:53:39,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 15:53:39,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:53:39,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:53:39,479 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:53:39,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-02 15:53:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:53:39,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 15:53:39,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:53:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 172 proven. 252 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-02 15:53:39,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:53:39,865 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 172 proven. 252 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-02 15:53:39,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:53:39,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068472100] [2023-12-02 15:53:39,866 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:53:39,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696253647] [2023-12-02 15:53:39,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696253647] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:53:39,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1372070714] [2023-12-02 15:53:39,867 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 15:53:39,867 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:53:39,867 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:53:39,868 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:53:39,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:53:40,641 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 15:53:40,652 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:53:40,671 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:53:43,130 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '50628#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 15:53:43,130 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:53:43,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:53:43,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2023-12-02 15:53:43,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022274673] [2023-12-02 15:53:43,131 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:53:43,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 15:53:43,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:53:43,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 15:53:43,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1285, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 15:53:43,133 INFO L87 Difference]: Start difference. First operand 2656 states and 2963 transitions. Second operand has 16 states, 16 states have (on average 11.8125) internal successors, (189), 16 states have internal predecessors, (189), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-12-02 15:53:44,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:53:44,145 INFO L93 Difference]: Finished difference Result 7428 states and 8285 transitions. [2023-12-02 15:53:44,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 15:53:44,145 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.8125) internal successors, (189), 16 states have internal predecessors, (189), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 155 [2023-12-02 15:53:44,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:53:44,173 INFO L225 Difference]: With dead ends: 7428 [2023-12-02 15:53:44,173 INFO L226 Difference]: Without dead ends: 6007 [2023-12-02 15:53:44,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 414 SyntacticMatches, 12 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=303, Invalid=2049, Unknown=0, NotChecked=0, Total=2352 [2023-12-02 15:53:44,177 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 128 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:53:44,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 544 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 15:53:44,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6007 states. [2023-12-02 15:53:44,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6007 to 3730. [2023-12-02 15:53:44,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3730 states, 3491 states have (on average 1.045259238040676) internal successors, (3649), 3493 states have internal predecessors, (3649), 233 states have call successors, (233), 3 states have call predecessors, (233), 3 states have return successors, (233), 233 states have call predecessors, (233), 233 states have call successors, (233) [2023-12-02 15:53:44,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3730 states to 3730 states and 4115 transitions. [2023-12-02 15:53:44,522 INFO L78 Accepts]: Start accepts. Automaton has 3730 states and 4115 transitions. Word has length 155 [2023-12-02 15:53:44,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:53:44,522 INFO L495 AbstractCegarLoop]: Abstraction has 3730 states and 4115 transitions. [2023-12-02 15:53:44,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.8125) internal successors, (189), 16 states have internal predecessors, (189), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-12-02 15:53:44,523 INFO L276 IsEmpty]: Start isEmpty. Operand 3730 states and 4115 transitions. [2023-12-02 15:53:44,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-12-02 15:53:44,525 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:53:44,525 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:53:44,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-12-02 15:53:44,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-02 15:53:44,726 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:53:44,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:53:44,726 INFO L85 PathProgramCache]: Analyzing trace with hash -270936779, now seen corresponding path program 2 times [2023-12-02 15:53:44,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:53:44,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810434460] [2023-12-02 15:53:44,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:53:44,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:53:44,736 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:53:44,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [928417659] [2023-12-02 15:53:44,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:53:44,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:53:44,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:53:44,737 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:53:44,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-02 15:53:44,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-02 15:53:44,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:53:44,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 15:53:44,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:53:44,981 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-12-02 15:53:44,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:53:45,208 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-12-02 15:53:45,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:53:45,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810434460] [2023-12-02 15:53:45,208 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:53:45,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928417659] [2023-12-02 15:53:45,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928417659] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:53:45,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2106805528] [2023-12-02 15:53:45,209 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 15:53:45,210 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:53:45,210 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:53:45,210 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:53:45,210 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:53:45,809 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 15:53:45,818 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:53:45,836 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:53:47,262 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '64258#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~x2~0#1| 1) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483647 |ULTIMATE.start_main_~y1~0#1|))' at error location [2023-12-02 15:53:47,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:53:47,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:53:47,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-12-02 15:53:47,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461758806] [2023-12-02 15:53:47,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:53:47,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 15:53:47,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:53:47,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 15:53:47,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 15:53:47,264 INFO L87 Difference]: Start difference. First operand 3730 states and 4115 transitions. Second operand has 20 states, 19 states have (on average 14.263157894736842) internal successors, (271), 20 states have internal predecessors, (271), 19 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2023-12-02 15:53:48,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:53:48,220 INFO L93 Difference]: Finished difference Result 7115 states and 7875 transitions. [2023-12-02 15:53:48,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 15:53:48,220 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 14.263157894736842) internal successors, (271), 20 states have internal predecessors, (271), 19 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) Word has length 168 [2023-12-02 15:53:48,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:53:48,245 INFO L225 Difference]: With dead ends: 7115 [2023-12-02 15:53:48,245 INFO L226 Difference]: Without dead ends: 7114 [2023-12-02 15:53:48,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 15:53:48,247 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 273 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:53:48,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 291 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 15:53:48,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7114 states. [2023-12-02 15:53:48,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7114 to 7080. [2023-12-02 15:53:48,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7080 states, 6631 states have (on average 1.046448499472176) internal successors, (6939), 6633 states have internal predecessors, (6939), 443 states have call successors, (443), 3 states have call predecessors, (443), 3 states have return successors, (443), 443 states have call predecessors, (443), 443 states have call successors, (443) [2023-12-02 15:53:48,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7080 states to 7080 states and 7825 transitions. [2023-12-02 15:53:48,757 INFO L78 Accepts]: Start accepts. Automaton has 7080 states and 7825 transitions. Word has length 168 [2023-12-02 15:53:48,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:53:48,758 INFO L495 AbstractCegarLoop]: Abstraction has 7080 states and 7825 transitions. [2023-12-02 15:53:48,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 14.263157894736842) internal successors, (271), 20 states have internal predecessors, (271), 19 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2023-12-02 15:53:48,758 INFO L276 IsEmpty]: Start isEmpty. Operand 7080 states and 7825 transitions. [2023-12-02 15:53:48,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-12-02 15:53:48,760 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:53:48,760 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:53:48,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-12-02 15:53:48,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-02 15:53:48,961 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:53:48,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:53:48,961 INFO L85 PathProgramCache]: Analyzing trace with hash -2083676421, now seen corresponding path program 5 times [2023-12-02 15:53:48,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:53:48,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158186946] [2023-12-02 15:53:48,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:53:48,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:53:48,972 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:53:48,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [908431449] [2023-12-02 15:53:48,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:53:48,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:53:48,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:53:48,973 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:53:48,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-02 15:53:49,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 15:53:49,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:53:49,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 15:53:49,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:53:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 274 proven. 51 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2023-12-02 15:53:49,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:53:50,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:53:50,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158186946] [2023-12-02 15:53:50,149 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:53:50,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908431449] [2023-12-02 15:53:50,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908431449] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:53:50,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1124691623] [2023-12-02 15:53:50,151 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 15:53:50,151 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:53:50,151 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:53:50,151 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:53:50,151 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:53:51,034 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 15:53:51,050 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:53:51,079 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:53:55,582 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '80874#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 15:53:55,582 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:53:55,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:53:55,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-12-02 15:53:55,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341912980] [2023-12-02 15:53:55,582 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 15:53:55,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 15:53:55,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:53:55,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 15:53:55,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 15:53:55,584 INFO L87 Difference]: Start difference. First operand 7080 states and 7825 transitions. Second operand has 9 states, 8 states have (on average 9.375) internal successors, (75), 9 states have internal predecessors, (75), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 15:53:56,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:53:56,336 INFO L93 Difference]: Finished difference Result 11917 states and 13168 transitions. [2023-12-02 15:53:56,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 15:53:56,336 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.375) internal successors, (75), 9 states have internal predecessors, (75), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 173 [2023-12-02 15:53:56,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:53:56,351 INFO L225 Difference]: With dead ends: 11917 [2023-12-02 15:53:56,351 INFO L226 Difference]: Without dead ends: 6369 [2023-12-02 15:53:56,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 331 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=213, Invalid=1427, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 15:53:56,359 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 59 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:53:56,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 142 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:53:56,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6369 states. [2023-12-02 15:53:56,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6369 to 6111. [2023-12-02 15:53:56,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6111 states, 5722 states have (on average 1.0470115344285216) internal successors, (5991), 5724 states have internal predecessors, (5991), 383 states have call successors, (383), 3 states have call predecessors, (383), 3 states have return successors, (383), 383 states have call predecessors, (383), 383 states have call successors, (383) [2023-12-02 15:53:56,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6111 states to 6111 states and 6757 transitions. [2023-12-02 15:53:56,898 INFO L78 Accepts]: Start accepts. Automaton has 6111 states and 6757 transitions. Word has length 173 [2023-12-02 15:53:56,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:53:56,898 INFO L495 AbstractCegarLoop]: Abstraction has 6111 states and 6757 transitions. [2023-12-02 15:53:56,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.375) internal successors, (75), 9 states have internal predecessors, (75), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 15:53:56,898 INFO L276 IsEmpty]: Start isEmpty. Operand 6111 states and 6757 transitions. [2023-12-02 15:53:56,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2023-12-02 15:53:56,900 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:53:56,901 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:53:56,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-12-02 15:53:57,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 15:53:57,101 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:53:57,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:53:57,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1068540697, now seen corresponding path program 6 times [2023-12-02 15:53:57,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:53:57,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574841680] [2023-12-02 15:53:57,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:53:57,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:53:57,111 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:53:57,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1996418929] [2023-12-02 15:53:57,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:53:57,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:53:57,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:53:57,112 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:53:57,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-02 15:53:57,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:53:57,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:53:57,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 15:53:57,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:53:57,577 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2023-12-02 15:53:57,577 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:53:57,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:53:57,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574841680] [2023-12-02 15:53:57,674 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:53:57,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996418929] [2023-12-02 15:53:57,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996418929] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:53:57,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1708971139] [2023-12-02 15:53:57,675 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 15:53:57,675 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:53:57,676 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:53:57,676 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:53:57,676 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:53:58,472 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 15:53:58,483 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:53:58,502 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:54:01,715 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '101819#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 15:54:01,715 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:54:01,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:54:01,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-12-02 15:54:01,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599065806] [2023-12-02 15:54:01,715 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 15:54:01,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 15:54:01,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:54:01,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 15:54:01,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 15:54:01,717 INFO L87 Difference]: Start difference. First operand 6111 states and 6757 transitions. Second operand has 10 states, 9 states have (on average 11.333333333333334) internal successors, (102), 10 states have internal predecessors, (102), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 15:54:02,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:54:02,358 INFO L93 Difference]: Finished difference Result 6466 states and 7146 transitions. [2023-12-02 15:54:02,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 15:54:02,358 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 11.333333333333334) internal successors, (102), 10 states have internal predecessors, (102), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 191 [2023-12-02 15:54:02,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:54:02,367 INFO L225 Difference]: With dead ends: 6466 [2023-12-02 15:54:02,367 INFO L226 Difference]: Without dead ends: 6465 [2023-12-02 15:54:02,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 338 SyntacticMatches, 22 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 15:54:02,370 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 28 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:54:02,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 266 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:54:02,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6465 states. [2023-12-02 15:54:02,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6465 to 6175. [2023-12-02 15:54:02,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6175 states, 5782 states have (on average 1.0465236942234521) internal successors, (6051), 5784 states have internal predecessors, (6051), 387 states have call successors, (387), 3 states have call predecessors, (387), 3 states have return successors, (387), 387 states have call predecessors, (387), 387 states have call successors, (387) [2023-12-02 15:54:02,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6175 states to 6175 states and 6825 transitions. [2023-12-02 15:54:02,810 INFO L78 Accepts]: Start accepts. Automaton has 6175 states and 6825 transitions. Word has length 191 [2023-12-02 15:54:02,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:54:02,811 INFO L495 AbstractCegarLoop]: Abstraction has 6175 states and 6825 transitions. [2023-12-02 15:54:02,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 11.333333333333334) internal successors, (102), 10 states have internal predecessors, (102), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 15:54:02,811 INFO L276 IsEmpty]: Start isEmpty. Operand 6175 states and 6825 transitions. [2023-12-02 15:54:02,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-12-02 15:54:02,813 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:54:02,813 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:54:02,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-12-02 15:54:03,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-02 15:54:03,014 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:54:03,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:54:03,014 INFO L85 PathProgramCache]: Analyzing trace with hash -159477006, now seen corresponding path program 3 times [2023-12-02 15:54:03,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:54:03,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098916773] [2023-12-02 15:54:03,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:54:03,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:54:03,025 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:54:03,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436893723] [2023-12-02 15:54:03,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:54:03,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:54:03,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:54:03,027 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:54:03,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-02 15:54:03,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:54:03,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:54:03,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 15:54:03,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:54:03,333 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 0 proven. 830 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-02 15:54:03,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:54:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 0 proven. 830 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-02 15:54:03,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:54:03,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098916773] [2023-12-02 15:54:03,644 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:54:03,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436893723] [2023-12-02 15:54:03,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436893723] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:54:03,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1127177926] [2023-12-02 15:54:03,645 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 15:54:03,645 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:54:03,646 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:54:03,646 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:54:03,646 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:54:04,284 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 15:54:04,290 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:54:04,308 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:54:05,496 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '117301#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= 2147483647 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y1~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 15:54:05,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:54:05,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:54:05,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2023-12-02 15:54:05,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262730337] [2023-12-02 15:54:05,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:54:05,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 15:54:05,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:54:05,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 15:54:05,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1307, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 15:54:05,498 INFO L87 Difference]: Start difference. First operand 6175 states and 6825 transitions. Second operand has 24 states, 23 states have (on average 14.130434782608695) internal successors, (325), 24 states have internal predecessors, (325), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2023-12-02 15:54:06,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:54:06,545 INFO L93 Difference]: Finished difference Result 11392 states and 12866 transitions. [2023-12-02 15:54:06,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 15:54:06,546 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 14.130434782608695) internal successors, (325), 24 states have internal predecessors, (325), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) Word has length 201 [2023-12-02 15:54:06,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:54:06,562 INFO L225 Difference]: With dead ends: 11392 [2023-12-02 15:54:06,562 INFO L226 Difference]: Without dead ends: 11391 [2023-12-02 15:54:06,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 551 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=333, Invalid=1307, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 15:54:06,565 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 143 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:54:06,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 230 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:54:06,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11391 states. [2023-12-02 15:54:07,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11391 to 10591. [2023-12-02 15:54:07,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10591 states, 9922 states have (on average 1.054928441846402) internal successors, (10467), 9924 states have internal predecessors, (10467), 663 states have call successors, (663), 3 states have call predecessors, (663), 3 states have return successors, (663), 663 states have call predecessors, (663), 663 states have call successors, (663) [2023-12-02 15:54:07,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10591 states to 10591 states and 11793 transitions. [2023-12-02 15:54:07,510 INFO L78 Accepts]: Start accepts. Automaton has 10591 states and 11793 transitions. Word has length 201 [2023-12-02 15:54:07,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:54:07,510 INFO L495 AbstractCegarLoop]: Abstraction has 10591 states and 11793 transitions. [2023-12-02 15:54:07,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 14.130434782608695) internal successors, (325), 24 states have internal predecessors, (325), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2023-12-02 15:54:07,510 INFO L276 IsEmpty]: Start isEmpty. Operand 10591 states and 11793 transitions. [2023-12-02 15:54:07,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-12-02 15:54:07,514 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:54:07,514 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:54:07,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-12-02 15:54:07,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-02 15:54:07,715 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:54:07,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:54:07,715 INFO L85 PathProgramCache]: Analyzing trace with hash -628357887, now seen corresponding path program 7 times [2023-12-02 15:54:07,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:54:07,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238918828] [2023-12-02 15:54:07,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:54:07,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:54:07,729 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:54:07,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821823888] [2023-12-02 15:54:07,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 15:54:07,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:54:07,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:54:07,730 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:54:07,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-02 15:54:07,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:54:07,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 15:54:07,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:54:08,179 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 257 proven. 584 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-02 15:54:08,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:54:08,442 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 257 proven. 584 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-02 15:54:08,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:54:08,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238918828] [2023-12-02 15:54:08,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:54:08,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821823888] [2023-12-02 15:54:08,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821823888] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:54:08,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1749266320] [2023-12-02 15:54:08,444 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 15:54:08,444 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:54:08,444 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:54:08,444 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:54:08,444 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:54:09,334 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 15:54:09,345 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:54:09,382 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:54:12,763 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '143228#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 15:54:12,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:54:12,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:54:12,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2023-12-02 15:54:12,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163925779] [2023-12-02 15:54:12,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:54:12,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 15:54:12,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:54:12,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 15:54:12,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1516, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 15:54:12,766 INFO L87 Difference]: Start difference. First operand 10591 states and 11793 transitions. Second operand has 19 states, 19 states have (on average 12.947368421052632) internal successors, (246), 19 states have internal predecessors, (246), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-12-02 15:54:14,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:54:14,480 INFO L93 Difference]: Finished difference Result 24199 states and 26980 transitions. [2023-12-02 15:54:14,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 15:54:14,480 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 12.947368421052632) internal successors, (246), 19 states have internal predecessors, (246), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 209 [2023-12-02 15:54:14,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:54:14,504 INFO L225 Difference]: With dead ends: 24199 [2023-12-02 15:54:14,504 INFO L226 Difference]: Without dead ends: 17579 [2023-12-02 15:54:14,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 631 GetRequests, 554 SyntacticMatches, 31 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=275, Invalid=1981, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 15:54:14,513 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 51 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:54:14,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 476 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:54:14,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17579 states. [2023-12-02 15:54:15,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17579 to 12120. [2023-12-02 15:54:15,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12120 states, 11356 states have (on average 1.0494011976047903) internal successors, (11917), 11358 states have internal predecessors, (11917), 758 states have call successors, (758), 3 states have call predecessors, (758), 3 states have return successors, (758), 758 states have call predecessors, (758), 758 states have call successors, (758) [2023-12-02 15:54:15,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12120 states to 12120 states and 13433 transitions. [2023-12-02 15:54:15,465 INFO L78 Accepts]: Start accepts. Automaton has 12120 states and 13433 transitions. Word has length 209 [2023-12-02 15:54:15,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:54:15,465 INFO L495 AbstractCegarLoop]: Abstraction has 12120 states and 13433 transitions. [2023-12-02 15:54:15,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 12.947368421052632) internal successors, (246), 19 states have internal predecessors, (246), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-12-02 15:54:15,465 INFO L276 IsEmpty]: Start isEmpty. Operand 12120 states and 13433 transitions. [2023-12-02 15:54:15,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-12-02 15:54:15,468 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:54:15,468 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:54:15,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-12-02 15:54:15,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:54:15,668 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:54:15,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:54:15,669 INFO L85 PathProgramCache]: Analyzing trace with hash -522076567, now seen corresponding path program 8 times [2023-12-02 15:54:15,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:54:15,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200153144] [2023-12-02 15:54:15,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:54:15,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:54:15,682 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:54:15,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980956370] [2023-12-02 15:54:15,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:54:15,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:54:15,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:54:15,683 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:54:15,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-02 15:54:15,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-02 15:54:15,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:54:15,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 15:54:15,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:54:16,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1146 backedges. 0 proven. 792 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2023-12-02 15:54:16,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:54:16,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:54:16,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200153144] [2023-12-02 15:54:16,666 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:54:16,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980956370] [2023-12-02 15:54:16,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980956370] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:54:16,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [652742593] [2023-12-02 15:54:16,667 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 15:54:16,667 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:54:16,667 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:54:16,667 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:54:16,667 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:54:17,511 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 15:54:17,526 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:54:17,555 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:54:21,206 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '184867#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 15:54:21,206 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:54:21,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:54:21,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-12-02 15:54:21,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227108079] [2023-12-02 15:54:21,206 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 15:54:21,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 15:54:21,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:54:21,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 15:54:21,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 15:54:21,208 INFO L87 Difference]: Start difference. First operand 12120 states and 13433 transitions. Second operand has 12 states, 11 states have (on average 10.636363636363637) internal successors, (117), 12 states have internal predecessors, (117), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-12-02 15:54:22,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:54:22,868 INFO L93 Difference]: Finished difference Result 19111 states and 21216 transitions. [2023-12-02 15:54:22,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 15:54:22,868 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 10.636363636363637) internal successors, (117), 12 states have internal predecessors, (117), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 227 [2023-12-02 15:54:22,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:54:22,888 INFO L225 Difference]: With dead ends: 19111 [2023-12-02 15:54:22,888 INFO L226 Difference]: Without dead ends: 12594 [2023-12-02 15:54:22,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 403 SyntacticMatches, 26 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=276, Invalid=2274, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 15:54:22,897 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 210 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:54:22,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 438 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 15:54:22,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12594 states. [2023-12-02 15:54:23,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12594 to 12216. [2023-12-02 15:54:23,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12216 states, 11446 states have (on average 1.0490127555477897) internal successors, (12007), 11448 states have internal predecessors, (12007), 764 states have call successors, (764), 3 states have call predecessors, (764), 3 states have return successors, (764), 764 states have call predecessors, (764), 764 states have call successors, (764) [2023-12-02 15:54:23,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12216 states to 12216 states and 13535 transitions. [2023-12-02 15:54:23,860 INFO L78 Accepts]: Start accepts. Automaton has 12216 states and 13535 transitions. Word has length 227 [2023-12-02 15:54:23,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:54:23,861 INFO L495 AbstractCegarLoop]: Abstraction has 12216 states and 13535 transitions. [2023-12-02 15:54:23,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 10.636363636363637) internal successors, (117), 12 states have internal predecessors, (117), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-12-02 15:54:23,861 INFO L276 IsEmpty]: Start isEmpty. Operand 12216 states and 13535 transitions. [2023-12-02 15:54:23,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-12-02 15:54:23,863 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:54:23,863 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:54:23,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-12-02 15:54:24,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:54:24,064 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:54:24,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:54:24,064 INFO L85 PathProgramCache]: Analyzing trace with hash 564193587, now seen corresponding path program 9 times [2023-12-02 15:54:24,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:54:24,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152800063] [2023-12-02 15:54:24,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:54:24,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:54:24,077 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:54:24,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1426978732] [2023-12-02 15:54:24,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:54:24,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:54:24,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:54:24,079 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:54:24,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-02 15:54:24,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:54:24,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:54:24,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 15:54:24,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:54:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1118 backedges. 0 proven. 816 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2023-12-02 15:54:24,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:54:25,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1118 backedges. 0 proven. 816 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2023-12-02 15:54:25,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:54:25,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152800063] [2023-12-02 15:54:25,072 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:54:25,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426978732] [2023-12-02 15:54:25,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426978732] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:54:25,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [848135009] [2023-12-02 15:54:25,073 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 15:54:25,073 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:54:25,073 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:54:25,073 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:54:25,074 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:54:25,872 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 15:54:25,883 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:54:25,901 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:54:29,582 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '221547#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 15:54:29,582 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:54:29,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:54:29,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2023-12-02 15:54:29,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7796918] [2023-12-02 15:54:29,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:54:29,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 15:54:29,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:54:29,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 15:54:29,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1468, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 15:54:29,585 INFO L87 Difference]: Start difference. First operand 12216 states and 13535 transitions. Second operand has 18 states, 17 states have (on average 12.411764705882353) internal successors, (211), 18 states have internal predecessors, (211), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-12-02 15:54:34,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:54:34,680 INFO L93 Difference]: Finished difference Result 15653 states and 17344 transitions. [2023-12-02 15:54:34,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-02 15:54:34,680 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 12.411764705882353) internal successors, (211), 18 states have internal predecessors, (211), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 227 [2023-12-02 15:54:34,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:54:34,704 INFO L225 Difference]: With dead ends: 15653 [2023-12-02 15:54:34,704 INFO L226 Difference]: Without dead ends: 15652 [2023-12-02 15:54:34,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 613 SyntacticMatches, 27 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1884 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=650, Invalid=4042, Unknown=0, NotChecked=0, Total=4692 [2023-12-02 15:54:34,711 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 366 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:54:34,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 520 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 15:54:34,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15652 states. [2023-12-02 15:54:35,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15652 to 15350. [2023-12-02 15:54:35,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15350 states, 14385 states have (on average 1.0480361487660759) internal successors, (15076), 14387 states have internal predecessors, (15076), 959 states have call successors, (959), 3 states have call predecessors, (959), 3 states have return successors, (959), 959 states have call predecessors, (959), 959 states have call successors, (959) [2023-12-02 15:54:35,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15350 states to 15350 states and 16994 transitions. [2023-12-02 15:54:35,902 INFO L78 Accepts]: Start accepts. Automaton has 15350 states and 16994 transitions. Word has length 227 [2023-12-02 15:54:35,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:54:35,903 INFO L495 AbstractCegarLoop]: Abstraction has 15350 states and 16994 transitions. [2023-12-02 15:54:35,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 12.411764705882353) internal successors, (211), 18 states have internal predecessors, (211), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-12-02 15:54:35,903 INFO L276 IsEmpty]: Start isEmpty. Operand 15350 states and 16994 transitions. [2023-12-02 15:54:35,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-12-02 15:54:35,906 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:54:35,906 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:54:35,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-12-02 15:54:36,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-12-02 15:54:36,107 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:54:36,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:54:36,107 INFO L85 PathProgramCache]: Analyzing trace with hash -2077693551, now seen corresponding path program 10 times [2023-12-02 15:54:36,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:54:36,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907560665] [2023-12-02 15:54:36,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:54:36,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:54:36,118 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:54:36,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003185242] [2023-12-02 15:54:36,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 15:54:36,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:54:36,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:54:36,119 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:54:36,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-02 15:54:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:54:36,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 15:54:36,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:54:36,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 888 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2023-12-02 15:54:36,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:54:37,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 888 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2023-12-02 15:54:37,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:54:37,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907560665] [2023-12-02 15:54:37,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:54:37,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003185242] [2023-12-02 15:54:37,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003185242] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:54:37,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [891714098] [2023-12-02 15:54:37,672 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 15:54:37,672 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:54:37,673 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:54:37,673 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:54:37,673 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:54:38,457 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 15:54:38,468 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:54:38,486 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:54:42,079 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '257894#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 15:54:42,079 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:54:42,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:54:42,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-12-02 15:54:42,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748971388] [2023-12-02 15:54:42,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:54:42,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 15:54:42,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:54:42,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 15:54:42,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2023-12-02 15:54:42,081 INFO L87 Difference]: Start difference. First operand 15350 states and 16994 transitions. Second operand has 20 states, 19 states have (on average 14.263157894736842) internal successors, (271), 20 states have internal predecessors, (271), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2023-12-02 15:54:45,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:54:45,031 INFO L93 Difference]: Finished difference Result 19489 states and 21559 transitions. [2023-12-02 15:54:45,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-02 15:54:45,032 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 14.263157894736842) internal successors, (271), 20 states have internal predecessors, (271), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 227 [2023-12-02 15:54:45,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:54:45,053 INFO L225 Difference]: With dead ends: 19489 [2023-12-02 15:54:45,053 INFO L226 Difference]: Without dead ends: 19488 [2023-12-02 15:54:45,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 626 SyntacticMatches, 12 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=665, Invalid=3891, Unknown=0, NotChecked=0, Total=4556 [2023-12-02 15:54:45,057 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 226 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1506 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 15:54:45,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 737 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1506 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 15:54:45,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19488 states. [2023-12-02 15:54:46,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19488 to 19310. [2023-12-02 15:54:46,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19310 states, 18097 states have (on average 1.0463612753495055) internal successors, (18936), 18099 states have internal predecessors, (18936), 1207 states have call successors, (1207), 3 states have call predecessors, (1207), 3 states have return successors, (1207), 1207 states have call predecessors, (1207), 1207 states have call successors, (1207) [2023-12-02 15:54:46,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19310 states to 19310 states and 21350 transitions. [2023-12-02 15:54:46,704 INFO L78 Accepts]: Start accepts. Automaton has 19310 states and 21350 transitions. Word has length 227 [2023-12-02 15:54:46,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:54:46,704 INFO L495 AbstractCegarLoop]: Abstraction has 19310 states and 21350 transitions. [2023-12-02 15:54:46,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 14.263157894736842) internal successors, (271), 20 states have internal predecessors, (271), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2023-12-02 15:54:46,705 INFO L276 IsEmpty]: Start isEmpty. Operand 19310 states and 21350 transitions. [2023-12-02 15:54:46,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2023-12-02 15:54:46,710 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:54:46,710 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:54:46,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-12-02 15:54:46,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-12-02 15:54:46,910 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:54:46,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:54:46,911 INFO L85 PathProgramCache]: Analyzing trace with hash -473130103, now seen corresponding path program 11 times [2023-12-02 15:54:46,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:54:46,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580312331] [2023-12-02 15:54:46,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:54:46,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:54:46,923 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:54:46,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2006898057] [2023-12-02 15:54:46,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:54:46,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:54:46,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:54:46,925 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:54:46,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-02 15:54:47,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-02 15:54:47,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:54:47,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 15:54:47,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:54:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2098 backedges. 0 proven. 1312 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2023-12-02 15:54:47,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:54:47,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:54:47,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580312331] [2023-12-02 15:54:47,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:54:47,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006898057] [2023-12-02 15:54:47,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006898057] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:54:47,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [458413655] [2023-12-02 15:54:47,573 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 15:54:47,573 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:54:47,573 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:54:47,573 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:54:47,573 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:54:48,346 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 15:54:48,357 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:54:48,376 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:54:51,281 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '302576#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 15:54:51,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:54:51,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:54:51,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-12-02 15:54:51,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560783182] [2023-12-02 15:54:51,282 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 15:54:51,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 15:54:51,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:54:51,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 15:54:51,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 15:54:51,283 INFO L87 Difference]: Start difference. First operand 19310 states and 21350 transitions. Second operand has 12 states, 11 states have (on average 12.0) internal successors, (132), 12 states have internal predecessors, (132), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-02 15:54:53,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:54:53,645 INFO L93 Difference]: Finished difference Result 27036 states and 29948 transitions. [2023-12-02 15:54:53,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 15:54:53,646 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 12.0) internal successors, (132), 12 states have internal predecessors, (132), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 299 [2023-12-02 15:54:53,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:54:53,663 INFO L225 Difference]: With dead ends: 27036 [2023-12-02 15:54:53,663 INFO L226 Difference]: Without dead ends: 20535 [2023-12-02 15:54:53,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 557 SyntacticMatches, 16 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=245, Invalid=2511, Unknown=0, NotChecked=0, Total=2756 [2023-12-02 15:54:53,671 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 207 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 1663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:54:53,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 693 Invalid, 1663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 15:54:53,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20535 states. [2023-12-02 15:54:55,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20535 to 19330. [2023-12-02 15:54:55,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19330 states, 18116 states have (on average 1.0463126517995143) internal successors, (18955), 18118 states have internal predecessors, (18955), 1208 states have call successors, (1208), 3 states have call predecessors, (1208), 3 states have return successors, (1208), 1208 states have call predecessors, (1208), 1208 states have call successors, (1208) [2023-12-02 15:54:55,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19330 states to 19330 states and 21371 transitions. [2023-12-02 15:54:55,179 INFO L78 Accepts]: Start accepts. Automaton has 19330 states and 21371 transitions. Word has length 299 [2023-12-02 15:54:55,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:54:55,180 INFO L495 AbstractCegarLoop]: Abstraction has 19330 states and 21371 transitions. [2023-12-02 15:54:55,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 12.0) internal successors, (132), 12 states have internal predecessors, (132), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-02 15:54:55,180 INFO L276 IsEmpty]: Start isEmpty. Operand 19330 states and 21371 transitions. [2023-12-02 15:54:55,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2023-12-02 15:54:55,186 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:54:55,186 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:54:55,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-12-02 15:54:55,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-12-02 15:54:55,387 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:54:55,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:54:55,387 INFO L85 PathProgramCache]: Analyzing trace with hash 837599985, now seen corresponding path program 12 times [2023-12-02 15:54:55,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:54:55,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638892982] [2023-12-02 15:54:55,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:54:55,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:54:55,400 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:54:55,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1593107547] [2023-12-02 15:54:55,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:54:55,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:54:55,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:54:55,401 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:54:55,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-02 15:54:55,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:54:55,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:54:55,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 15:54:55,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:54:56,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 599 proven. 1508 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2023-12-02 15:54:56,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:54:56,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 599 proven. 1508 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2023-12-02 15:54:56,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:54:56,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638892982] [2023-12-02 15:54:56,370 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:54:56,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593107547] [2023-12-02 15:54:56,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593107547] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:54:56,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [186194888] [2023-12-02 15:54:56,371 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 15:54:56,371 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:54:56,371 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:54:56,372 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:54:56,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:54:57,162 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 15:54:57,173 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:54:57,191 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:55:00,601 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '356732#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 15:55:00,601 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:55:00,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:55:00,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 28 [2023-12-02 15:55:00,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941879589] [2023-12-02 15:55:00,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:55:00,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 15:55:00,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:55:00,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 15:55:00,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=2245, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 15:55:00,604 INFO L87 Difference]: Start difference. First operand 19330 states and 21371 transitions. Second operand has 28 states, 28 states have (on average 13.607142857142858) internal successors, (381), 28 states have internal predecessors, (381), 26 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) [2023-12-02 15:55:03,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:55:03,932 INFO L93 Difference]: Finished difference Result 42369 states and 46981 transitions. [2023-12-02 15:55:03,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 15:55:03,932 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 13.607142857142858) internal successors, (381), 28 states have internal predecessors, (381), 26 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) Word has length 317 [2023-12-02 15:55:03,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:55:03,961 INFO L225 Difference]: With dead ends: 42369 [2023-12-02 15:55:03,961 INFO L226 Difference]: Without dead ends: 31324 [2023-12-02 15:55:03,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 873 SyntacticMatches, 27 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2421 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=449, Invalid=3091, Unknown=0, NotChecked=0, Total=3540 [2023-12-02 15:55:03,980 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 60 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 1691 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 15:55:03,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 974 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1691 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 15:55:04,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31324 states. [2023-12-02 15:55:05,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31324 to 23435. [2023-12-02 15:55:05,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23435 states, 21965 states have (on average 1.038652401547917) internal successors, (22814), 21967 states have internal predecessors, (22814), 1464 states have call successors, (1464), 3 states have call predecessors, (1464), 3 states have return successors, (1464), 1464 states have call predecessors, (1464), 1464 states have call successors, (1464) [2023-12-02 15:55:05,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23435 states to 23435 states and 25742 transitions. [2023-12-02 15:55:05,946 INFO L78 Accepts]: Start accepts. Automaton has 23435 states and 25742 transitions. Word has length 317 [2023-12-02 15:55:05,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:55:05,946 INFO L495 AbstractCegarLoop]: Abstraction has 23435 states and 25742 transitions. [2023-12-02 15:55:05,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 13.607142857142858) internal successors, (381), 28 states have internal predecessors, (381), 26 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) [2023-12-02 15:55:05,946 INFO L276 IsEmpty]: Start isEmpty. Operand 23435 states and 25742 transitions. [2023-12-02 15:55:05,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2023-12-02 15:55:05,953 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:55:05,953 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:55:05,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-12-02 15:55:06,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-12-02 15:55:06,154 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:55:06,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:55:06,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1171726247, now seen corresponding path program 13 times [2023-12-02 15:55:06,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:55:06,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350998071] [2023-12-02 15:55:06,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:55:06,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:55:06,169 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:55:06,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026082122] [2023-12-02 15:55:06,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 15:55:06,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:55:06,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:55:06,170 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:55:06,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-02 15:55:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:55:06,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 15:55:06,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:55:07,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2682 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2023-12-02 15:55:07,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:55:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2682 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2023-12-02 15:55:07,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:55:07,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350998071] [2023-12-02 15:55:07,706 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:55:07,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026082122] [2023-12-02 15:55:07,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026082122] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:55:07,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [188215596] [2023-12-02 15:55:07,708 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 15:55:07,708 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:55:07,708 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:55:07,708 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:55:07,708 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:55:08,510 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 15:55:08,521 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:55:08,539 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:55:12,413 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '432838#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 15:55:12,413 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:55:12,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:55:12,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2023-12-02 15:55:12,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015038309] [2023-12-02 15:55:12,413 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:55:12,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 15:55:12,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:55:12,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 15:55:12,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2101, Unknown=0, NotChecked=0, Total=2352 [2023-12-02 15:55:12,415 INFO L87 Difference]: Start difference. First operand 23435 states and 25742 transitions. Second operand has 26 states, 25 states have (on average 12.84) internal successors, (321), 26 states have internal predecessors, (321), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2023-12-02 15:55:22,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:55:22,965 INFO L93 Difference]: Finished difference Result 26153 states and 28732 transitions. [2023-12-02 15:55:22,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-12-02 15:55:22,966 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 12.84) internal successors, (321), 26 states have internal predecessors, (321), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 335 [2023-12-02 15:55:22,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:55:22,990 INFO L225 Difference]: With dead ends: 26153 [2023-12-02 15:55:22,990 INFO L226 Difference]: Without dead ends: 26152 [2023-12-02 15:55:22,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1058 GetRequests, 938 SyntacticMatches, 18 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3526 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=1790, Invalid=8922, Unknown=0, NotChecked=0, Total=10712 [2023-12-02 15:55:22,996 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 716 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 2548 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 2723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 2548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:55:22,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [718 Valid, 972 Invalid, 2723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 2548 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 15:55:23,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26152 states. [2023-12-02 15:55:25,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26152 to 25284. [2023-12-02 15:55:25,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25284 states, 23699 states have (on average 1.0389889868770834) internal successors, (24623), 23701 states have internal predecessors, (24623), 1579 states have call successors, (1579), 3 states have call predecessors, (1579), 3 states have return successors, (1579), 1579 states have call predecessors, (1579), 1579 states have call successors, (1579) [2023-12-02 15:55:25,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25284 states to 25284 states and 27781 transitions. [2023-12-02 15:55:25,062 INFO L78 Accepts]: Start accepts. Automaton has 25284 states and 27781 transitions. Word has length 335 [2023-12-02 15:55:25,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:55:25,063 INFO L495 AbstractCegarLoop]: Abstraction has 25284 states and 27781 transitions. [2023-12-02 15:55:25,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 12.84) internal successors, (321), 26 states have internal predecessors, (321), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2023-12-02 15:55:25,063 INFO L276 IsEmpty]: Start isEmpty. Operand 25284 states and 27781 transitions. [2023-12-02 15:55:25,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2023-12-02 15:55:25,071 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:55:25,071 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:55:25,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-12-02 15:55:25,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-12-02 15:55:25,271 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:55:25,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:55:25,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1609462975, now seen corresponding path program 3 times [2023-12-02 15:55:25,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:55:25,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142149419] [2023-12-02 15:55:25,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:55:25,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:55:25,284 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:55:25,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097541319] [2023-12-02 15:55:25,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:55:25,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:55:25,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:55:25,285 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:55:25,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-12-02 15:55:25,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:55:25,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:55:25,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 15:55:25,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:55:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3044 backedges. 0 proven. 2700 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2023-12-02 15:55:25,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:55:26,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3044 backedges. 0 proven. 2700 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2023-12-02 15:55:26,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:55:26,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142149419] [2023-12-02 15:55:26,415 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:55:26,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097541319] [2023-12-02 15:55:26,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097541319] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:55:26,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1868680183] [2023-12-02 15:55:26,416 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 15:55:26,416 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:55:26,416 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:55:26,417 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:55:26,417 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:55:27,057 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 15:55:27,065 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:55:27,084 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:55:28,659 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '492974#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~x2~0#1| 1) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483647 |ULTIMATE.start_main_~y1~0#1|))' at error location [2023-12-02 15:55:28,659 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:55:28,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:55:28,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2023-12-02 15:55:28,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418847778] [2023-12-02 15:55:28,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:55:28,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-02 15:55:28,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:55:28,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-02 15:55:28,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=2561, Unknown=0, NotChecked=0, Total=3422 [2023-12-02 15:55:28,663 INFO L87 Difference]: Start difference. First operand 25284 states and 27781 transitions. Second operand has 40 states, 39 states have (on average 14.64102564102564) internal successors, (571), 40 states have internal predecessors, (571), 39 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) [2023-12-02 15:55:32,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:55:32,434 INFO L93 Difference]: Finished difference Result 39099 states and 43041 transitions. [2023-12-02 15:55:32,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-02 15:55:32,434 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 14.64102564102564) internal successors, (571), 40 states have internal predecessors, (571), 39 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) Word has length 348 [2023-12-02 15:55:32,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:55:32,469 INFO L225 Difference]: With dead ends: 39099 [2023-12-02 15:55:32,469 INFO L226 Difference]: Without dead ends: 39098 [2023-12-02 15:55:32,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1042 GetRequests, 985 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=861, Invalid=2561, Unknown=0, NotChecked=0, Total=3422 [2023-12-02 15:55:32,475 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 833 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 15:55:32,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [833 Valid, 526 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 15:55:32,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39098 states. [2023-12-02 15:55:35,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39098 to 39024. [2023-12-02 15:55:35,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39024 states, 36579 states have (on average 1.0400229639957352) internal successors, (38043), 36581 states have internal predecessors, (38043), 2439 states have call successors, (2439), 3 states have call predecessors, (2439), 3 states have return successors, (2439), 2439 states have call predecessors, (2439), 2439 states have call successors, (2439) [2023-12-02 15:55:35,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39024 states to 39024 states and 42921 transitions. [2023-12-02 15:55:35,836 INFO L78 Accepts]: Start accepts. Automaton has 39024 states and 42921 transitions. Word has length 348 [2023-12-02 15:55:35,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:55:35,836 INFO L495 AbstractCegarLoop]: Abstraction has 39024 states and 42921 transitions. [2023-12-02 15:55:35,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 14.64102564102564) internal successors, (571), 40 states have internal predecessors, (571), 39 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) [2023-12-02 15:55:35,836 INFO L276 IsEmpty]: Start isEmpty. Operand 39024 states and 42921 transitions. [2023-12-02 15:55:35,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2023-12-02 15:55:35,845 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:55:35,845 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 16, 16, 16, 16, 16, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:55:35,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-12-02 15:55:36,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:55:36,046 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:55:36,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:55:36,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1817617091, now seen corresponding path program 14 times [2023-12-02 15:55:36,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:55:36,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473689980] [2023-12-02 15:55:36,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:55:36,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:55:36,058 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:55:36,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377816788] [2023-12-02 15:55:36,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:55:36,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:55:36,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:55:36,060 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:55:36,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-12-02 15:55:36,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-02 15:55:36,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:55:36,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-02 15:55:36,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:55:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3226 backedges. 1222 proven. 187 refuted. 0 times theorem prover too weak. 1817 trivial. 0 not checked. [2023-12-02 15:55:46,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:55:47,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:55:47,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473689980] [2023-12-02 15:55:47,400 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:55:47,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377816788] [2023-12-02 15:55:47,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377816788] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:55:47,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1193029713] [2023-12-02 15:55:47,401 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 15:55:47,401 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:55:47,402 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:55:47,402 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:55:47,402 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:55:48,227 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 15:55:48,237 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:55:48,256 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:55:56,395 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '582065#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 15:55:56,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:55:56,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:55:56,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-12-02 15:55:56,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608176326] [2023-12-02 15:55:56,396 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 15:55:56,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 15:55:56,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:55:56,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 15:55:56,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2050, Unknown=7, NotChecked=0, Total=2256 [2023-12-02 15:55:56,397 INFO L87 Difference]: Start difference. First operand 39024 states and 42921 transitions. Second operand has 21 states, 18 states have (on average 6.222222222222222) internal successors, (112), 21 states have internal predecessors, (112), 7 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-02 15:56:02,549 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 15:56:09,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:56:09,142 INFO L93 Difference]: Finished difference Result 65505 states and 72124 transitions. [2023-12-02 15:56:09,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-02 15:56:09,142 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 6.222222222222222) internal successors, (112), 21 states have internal predecessors, (112), 7 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 371 [2023-12-02 15:56:09,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:56:09,176 INFO L225 Difference]: With dead ends: 65505 [2023-12-02 15:56:09,176 INFO L226 Difference]: Without dead ends: 35601 [2023-12-02 15:56:09,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 663 SyntacticMatches, 44 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3493 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=451, Invalid=4798, Unknown=7, NotChecked=0, Total=5256 [2023-12-02 15:56:09,198 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 163 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 2150 mSolverCounterSat, 18 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 2173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2150 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:56:09,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 171 Invalid, 2173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2150 Invalid, 5 Unknown, 0 Unchecked, 6.6s Time] [2023-12-02 15:56:09,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35601 states. [2023-12-02 15:56:12,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35601 to 34768. [2023-12-02 15:56:12,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34768 states, 32588 states have (on average 1.0421013870136246) internal successors, (33960), 32590 states have internal predecessors, (33960), 2174 states have call successors, (2174), 3 states have call predecessors, (2174), 3 states have return successors, (2174), 2174 states have call predecessors, (2174), 2174 states have call successors, (2174) [2023-12-02 15:56:12,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34768 states to 34768 states and 38308 transitions. [2023-12-02 15:56:12,204 INFO L78 Accepts]: Start accepts. Automaton has 34768 states and 38308 transitions. Word has length 371 [2023-12-02 15:56:12,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:56:12,205 INFO L495 AbstractCegarLoop]: Abstraction has 34768 states and 38308 transitions. [2023-12-02 15:56:12,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 6.222222222222222) internal successors, (112), 21 states have internal predecessors, (112), 7 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-02 15:56:12,205 INFO L276 IsEmpty]: Start isEmpty. Operand 34768 states and 38308 transitions. [2023-12-02 15:56:12,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2023-12-02 15:56:12,215 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:56:12,215 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:56:12,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-12-02 15:56:12,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:56:12,415 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:56:12,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:56:12,416 INFO L85 PathProgramCache]: Analyzing trace with hash -179749422, now seen corresponding path program 4 times [2023-12-02 15:56:12,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:56:12,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729799705] [2023-12-02 15:56:12,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:56:12,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:56:12,430 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:56:12,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094167663] [2023-12-02 15:56:12,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 15:56:12,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:56:12,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:56:12,431 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:56:12,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-12-02 15:56:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:56:12,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 15:56:12,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:56:13,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4446 backedges. 0 proven. 3938 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2023-12-02 15:56:13,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:56:13,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4446 backedges. 0 proven. 3938 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2023-12-02 15:56:13,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:56:13,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729799705] [2023-12-02 15:56:13,901 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:56:13,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094167663] [2023-12-02 15:56:13,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094167663] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:56:13,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1920177277] [2023-12-02 15:56:13,902 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 15:56:13,902 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:56:13,902 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:56:13,902 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:56:13,902 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:56:14,578 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 15:56:14,583 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:56:14,602 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:56:16,487 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '697518#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= 2147483647 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y1~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 15:56:16,487 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:56:16,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:56:16,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2023-12-02 15:56:16,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246361008] [2023-12-02 15:56:16,488 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:56:16,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-02 15:56:16,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:56:16,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-02 15:56:16,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1185, Invalid=2975, Unknown=0, NotChecked=0, Total=4160 [2023-12-02 15:56:16,490 INFO L87 Difference]: Start difference. First operand 34768 states and 38308 transitions. Second operand has 48 states, 47 states have (on average 14.574468085106384) internal successors, (685), 48 states have internal predecessors, (685), 47 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2023-12-02 15:56:22,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:56:22,120 INFO L93 Difference]: Finished difference Result 63974 states and 72051 transitions. [2023-12-02 15:56:22,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-02 15:56:22,121 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 14.574468085106384) internal successors, (685), 48 states have internal predecessors, (685), 47 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) Word has length 417 [2023-12-02 15:56:22,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:56:22,184 INFO L225 Difference]: With dead ends: 63974 [2023-12-02 15:56:22,184 INFO L226 Difference]: Without dead ends: 63973 [2023-12-02 15:56:22,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1249 GetRequests, 1163 SyntacticMatches, 23 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2972 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1185, Invalid=2975, Unknown=0, NotChecked=0, Total=4160 [2023-12-02 15:56:22,193 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 452 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:56:22,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 423 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 15:56:22,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63973 states. [2023-12-02 15:56:27,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63973 to 58960. [2023-12-02 15:56:27,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58960 states, 55268 states have (on average 1.052182094521242) internal successors, (58152), 55270 states have internal predecessors, (58152), 3686 states have call successors, (3686), 3 states have call predecessors, (3686), 3 states have return successors, (3686), 3686 states have call predecessors, (3686), 3686 states have call successors, (3686) [2023-12-02 15:56:27,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58960 states to 58960 states and 65524 transitions. [2023-12-02 15:56:27,897 INFO L78 Accepts]: Start accepts. Automaton has 58960 states and 65524 transitions. Word has length 417 [2023-12-02 15:56:27,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:56:27,897 INFO L495 AbstractCegarLoop]: Abstraction has 58960 states and 65524 transitions. [2023-12-02 15:56:27,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 14.574468085106384) internal successors, (685), 48 states have internal predecessors, (685), 47 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2023-12-02 15:56:27,897 INFO L276 IsEmpty]: Start isEmpty. Operand 58960 states and 65524 transitions. [2023-12-02 15:56:27,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2023-12-02 15:56:27,911 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:56:27,912 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 20, 20, 20, 20, 20, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:56:27,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-12-02 15:56:28,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:56:28,112 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:56:28,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:56:28,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1400905251, now seen corresponding path program 15 times [2023-12-02 15:56:28,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:56:28,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132895466] [2023-12-02 15:56:28,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:56:28,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:56:28,127 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:56:28,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408154121] [2023-12-02 15:56:28,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:56:28,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:56:28,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:56:28,128 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:56:28,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-12-02 15:56:28,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:56:28,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:56:28,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 15:56:28,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:56:29,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4722 backedges. 0 proven. 3508 refuted. 0 times theorem prover too weak. 1214 trivial. 0 not checked. [2023-12-02 15:56:29,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:56:29,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:56:29,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132895466] [2023-12-02 15:56:29,359 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:56:29,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408154121] [2023-12-02 15:56:29,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408154121] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:56:29,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [326433268] [2023-12-02 15:56:29,360 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 15:56:29,361 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:56:29,361 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:56:29,361 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:56:29,361 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:56:30,185 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 15:56:30,196 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:56:30,214 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:56:34,376 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '836620#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 15:56:34,376 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:56:34,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:56:34,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-12-02 15:56:34,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052919679] [2023-12-02 15:56:34,376 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 15:56:34,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 15:56:34,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:56:34,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 15:56:34,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1255, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 15:56:34,377 INFO L87 Difference]: Start difference. First operand 58960 states and 65524 transitions. Second operand has 13 states, 12 states have (on average 13.083333333333334) internal successors, (157), 13 states have internal predecessors, (157), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-02 15:56:39,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:56:39,942 INFO L93 Difference]: Finished difference Result 61569 states and 68420 transitions. [2023-12-02 15:56:39,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 15:56:39,943 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 13.083333333333334) internal successors, (157), 13 states have internal predecessors, (157), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 443 [2023-12-02 15:56:39,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:56:40,007 INFO L225 Difference]: With dead ends: 61569 [2023-12-02 15:56:40,007 INFO L226 Difference]: Without dead ends: 61568 [2023-12-02 15:56:40,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 898 GetRequests, 837 SyntacticMatches, 24 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 15:56:40,017 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 30 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:56:40,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 360 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:56:40,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61568 states. [2023-12-02 15:56:45,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61568 to 60696. [2023-12-02 15:56:45,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60696 states, 56896 states have (on average 1.0521653543307086) internal successors, (59864), 56898 states have internal predecessors, (59864), 3794 states have call successors, (3794), 3 states have call predecessors, (3794), 3 states have return successors, (3794), 3794 states have call predecessors, (3794), 3794 states have call successors, (3794) [2023-12-02 15:56:45,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60696 states to 60696 states and 67452 transitions. [2023-12-02 15:56:45,756 INFO L78 Accepts]: Start accepts. Automaton has 60696 states and 67452 transitions. Word has length 443 [2023-12-02 15:56:45,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:56:45,756 INFO L495 AbstractCegarLoop]: Abstraction has 60696 states and 67452 transitions. [2023-12-02 15:56:45,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 13.083333333333334) internal successors, (157), 13 states have internal predecessors, (157), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-02 15:56:45,756 INFO L276 IsEmpty]: Start isEmpty. Operand 60696 states and 67452 transitions. [2023-12-02 15:56:45,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2023-12-02 15:56:45,770 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:56:45,771 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 22, 22, 22, 22, 22, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:56:45,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-12-02 15:56:45,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-12-02 15:56:45,971 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:56:45,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:56:45,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1597742163, now seen corresponding path program 16 times [2023-12-02 15:56:45,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:56:45,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983703452] [2023-12-02 15:56:45,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:56:45,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:56:45,988 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:56:45,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383831094] [2023-12-02 15:56:45,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 15:56:45,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:56:45,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:56:45,989 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:56:45,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-12-02 15:56:46,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:56:46,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 15:56:46,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:56:46,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5578 backedges. 3306 proven. 936 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-12-02 15:56:46,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:56:46,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5578 backedges. 2970 proven. 936 refuted. 0 times theorem prover too weak. 1672 trivial. 0 not checked. [2023-12-02 15:56:46,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:56:46,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983703452] [2023-12-02 15:56:46,819 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:56:46,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383831094] [2023-12-02 15:56:46,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383831094] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:56:46,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019448606] [2023-12-02 15:56:46,820 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 15:56:46,820 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:56:46,821 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:56:46,821 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:56:46,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:56:47,709 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 15:56:47,720 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:56:47,745 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:56:51,940 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '977109#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 15:56:51,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:56:51,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:56:51,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2023-12-02 15:56:51,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009288112] [2023-12-02 15:56:51,940 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:56:51,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 15:56:51,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:56:51,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 15:56:51,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1972, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 15:56:51,942 INFO L87 Difference]: Start difference. First operand 60696 states and 67452 transitions. Second operand has 25 states, 25 states have (on average 13.56) internal successors, (339), 25 states have internal predecessors, (339), 23 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2023-12-02 15:57:04,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:57:04,383 INFO L93 Difference]: Finished difference Result 182458 states and 203426 transitions. [2023-12-02 15:57:04,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 15:57:04,383 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 13.56) internal successors, (339), 25 states have internal predecessors, (339), 23 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) Word has length 479 [2023-12-02 15:57:04,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:57:04,542 INFO L225 Difference]: With dead ends: 182458 [2023-12-02 15:57:04,542 INFO L226 Difference]: Without dead ends: 138848 [2023-12-02 15:57:04,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1451 GetRequests, 1356 SyntacticMatches, 33 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2762 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=513, Invalid=3519, Unknown=0, NotChecked=0, Total=4032 [2023-12-02 15:57:04,579 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 194 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1747 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 1758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 15:57:04,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 942 Invalid, 1758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1747 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 15:57:04,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138848 states. [2023-12-02 15:57:11,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138848 to 71567. [2023-12-02 15:57:11,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71567 states, 67090 states have (on average 1.0452377403487851) internal successors, (70125), 67092 states have internal predecessors, (70125), 4471 states have call successors, (4471), 3 states have call predecessors, (4471), 3 states have return successors, (4471), 4471 states have call predecessors, (4471), 4471 states have call successors, (4471) [2023-12-02 15:57:11,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71567 states to 71567 states and 79067 transitions. [2023-12-02 15:57:11,826 INFO L78 Accepts]: Start accepts. Automaton has 71567 states and 79067 transitions. Word has length 479 [2023-12-02 15:57:11,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:57:11,826 INFO L495 AbstractCegarLoop]: Abstraction has 71567 states and 79067 transitions. [2023-12-02 15:57:11,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 13.56) internal successors, (339), 25 states have internal predecessors, (339), 23 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2023-12-02 15:57:11,826 INFO L276 IsEmpty]: Start isEmpty. Operand 71567 states and 79067 transitions. [2023-12-02 15:57:11,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2023-12-02 15:57:11,841 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:57:11,841 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 26, 26, 26, 26, 26, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:57:11,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-12-02 15:57:12,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:57:12,042 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:57:12,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:57:12,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1910157673, now seen corresponding path program 17 times [2023-12-02 15:57:12,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:57:12,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567461304] [2023-12-02 15:57:12,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:57:12,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:57:12,061 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:57:12,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1107956066] [2023-12-02 15:57:12,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:57:12,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:57:12,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:57:12,062 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:57:12,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-12-02 15:57:12,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-12-02 15:57:12,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:57:12,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 15:57:12,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:57:12,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 0 proven. 3260 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2023-12-02 15:57:12,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:57:12,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:57:12,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567461304] [2023-12-02 15:57:12,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:57:12,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107956066] [2023-12-02 15:57:12,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107956066] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:57:12,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [458712290] [2023-12-02 15:57:12,998 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 15:57:12,998 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:57:12,998 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:57:12,998 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:57:12,998 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:57:13,763 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 15:57:13,774 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:57:13,792 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:57:19,528 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1264580#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 15:57:19,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:57:19,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:57:19,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-12-02 15:57:19,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544536675] [2023-12-02 15:57:19,529 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 15:57:19,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 15:57:19,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:57:19,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 15:57:19,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1411, Unknown=0, NotChecked=0, Total=1560 [2023-12-02 15:57:19,530 INFO L87 Difference]: Start difference. First operand 71567 states and 79067 transitions. Second operand has 14 states, 13 states have (on average 12.461538461538462) internal successors, (162), 14 states have internal predecessors, (162), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-12-02 15:57:26,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:57:26,997 INFO L93 Difference]: Finished difference Result 101629 states and 112598 transitions. [2023-12-02 15:57:26,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-02 15:57:26,998 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 12.461538461538462) internal successors, (162), 14 states have internal predecessors, (162), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 515 [2023-12-02 15:57:26,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:57:27,073 INFO L225 Difference]: With dead ends: 101629 [2023-12-02 15:57:27,073 INFO L226 Difference]: Without dead ends: 73228 [2023-12-02 15:57:27,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1060 GetRequests, 945 SyntacticMatches, 58 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=277, Invalid=3145, Unknown=0, NotChecked=0, Total=3422 [2023-12-02 15:57:27,098 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 181 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 2697 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 2709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 15:57:27,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 1120 Invalid, 2709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2697 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 15:57:27,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73228 states. [2023-12-02 15:57:33,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73228 to 70960. [2023-12-02 15:57:33,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70960 states, 66521 states have (on average 1.0450384089234979) internal successors, (69517), 66523 states have internal predecessors, (69517), 4433 states have call successors, (4433), 3 states have call predecessors, (4433), 3 states have return successors, (4433), 4433 states have call predecessors, (4433), 4433 states have call successors, (4433) [2023-12-02 15:57:33,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70960 states to 70960 states and 78383 transitions. [2023-12-02 15:57:33,853 INFO L78 Accepts]: Start accepts. Automaton has 70960 states and 78383 transitions. Word has length 515 [2023-12-02 15:57:33,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:57:33,854 INFO L495 AbstractCegarLoop]: Abstraction has 70960 states and 78383 transitions. [2023-12-02 15:57:33,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 12.461538461538462) internal successors, (162), 14 states have internal predecessors, (162), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-12-02 15:57:33,854 INFO L276 IsEmpty]: Start isEmpty. Operand 70960 states and 78383 transitions. [2023-12-02 15:57:33,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2023-12-02 15:57:33,872 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:57:33,872 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 25, 25, 25, 25, 25, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:57:33,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-12-02 15:57:34,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:57:34,072 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:57:34,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:57:34,073 INFO L85 PathProgramCache]: Analyzing trace with hash 371994163, now seen corresponding path program 18 times [2023-12-02 15:57:34,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:57:34,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597278620] [2023-12-02 15:57:34,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:57:34,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:57:34,090 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:57:34,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191865138] [2023-12-02 15:57:34,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:57:34,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:57:34,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:57:34,091 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:57:34,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-12-02 15:57:34,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:57:34,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:57:34,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 15:57:34,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:57:34,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6590 backedges. 3687 proven. 1912 refuted. 0 times theorem prover too weak. 991 trivial. 0 not checked. [2023-12-02 15:57:34,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:57:35,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6590 backedges. 3345 proven. 1912 refuted. 0 times theorem prover too weak. 1333 trivial. 0 not checked. [2023-12-02 15:57:35,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:57:35,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597278620] [2023-12-02 15:57:35,239 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:57:35,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191865138] [2023-12-02 15:57:35,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191865138] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:57:35,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1228687106] [2023-12-02 15:57:35,241 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 15:57:35,241 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:57:35,241 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:57:35,241 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:57:35,241 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:57:36,026 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 15:57:36,037 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:57:36,058 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:57:41,100 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1461947#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 15:57:41,100 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:57:41,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:57:41,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 31 [2023-12-02 15:57:41,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682871233] [2023-12-02 15:57:41,100 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:57:41,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 15:57:41,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:57:41,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 15:57:41,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=2516, Unknown=0, NotChecked=0, Total=2862 [2023-12-02 15:57:41,103 INFO L87 Difference]: Start difference. First operand 70960 states and 78383 transitions. Second operand has 31 states, 31 states have (on average 14.225806451612904) internal successors, (441), 31 states have internal predecessors, (441), 30 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (32), 30 states have call predecessors, (32), 30 states have call successors, (32) [2023-12-02 15:57:51,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:57:51,577 INFO L93 Difference]: Finished difference Result 150647 states and 167246 transitions. [2023-12-02 15:57:51,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 15:57:51,578 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 14.225806451612904) internal successors, (441), 31 states have internal predecessors, (441), 30 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (32), 30 states have call predecessors, (32), 30 states have call successors, (32) Word has length 515 [2023-12-02 15:57:51,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:57:51,706 INFO L225 Difference]: With dead ends: 150647 [2023-12-02 15:57:51,707 INFO L226 Difference]: Without dead ends: 112304 [2023-12-02 15:57:51,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1553 GetRequests, 1421 SyntacticMatches, 70 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5377 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=521, Invalid=3511, Unknown=0, NotChecked=0, Total=4032 [2023-12-02 15:57:51,735 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 71 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 15:57:51,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 1002 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1730 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 15:57:51,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112304 states. [2023-12-02 15:57:58,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112304 to 78910. [2023-12-02 15:57:59,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78910 states, 73976 states have (on average 1.0409457121228507) internal successors, (77005), 73978 states have internal predecessors, (77005), 4928 states have call successors, (4928), 3 states have call predecessors, (4928), 3 states have return successors, (4928), 4928 states have call predecessors, (4928), 4928 states have call successors, (4928) [2023-12-02 15:57:59,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78910 states to 78910 states and 86861 transitions. [2023-12-02 15:57:59,139 INFO L78 Accepts]: Start accepts. Automaton has 78910 states and 86861 transitions. Word has length 515 [2023-12-02 15:57:59,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:57:59,139 INFO L495 AbstractCegarLoop]: Abstraction has 78910 states and 86861 transitions. [2023-12-02 15:57:59,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 14.225806451612904) internal successors, (441), 31 states have internal predecessors, (441), 30 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (32), 30 states have call predecessors, (32), 30 states have call successors, (32) [2023-12-02 15:57:59,139 INFO L276 IsEmpty]: Start isEmpty. Operand 78910 states and 86861 transitions. [2023-12-02 15:57:59,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2023-12-02 15:57:59,155 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:57:59,156 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 24, 24, 24, 24, 24, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:57:59,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-12-02 15:57:59,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:57:59,356 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:57:59,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:57:59,357 INFO L85 PathProgramCache]: Analyzing trace with hash 212371069, now seen corresponding path program 19 times [2023-12-02 15:57:59,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:57:59,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068209937] [2023-12-02 15:57:59,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:57:59,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:57:59,382 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:57:59,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2017925894] [2023-12-02 15:57:59,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 15:57:59,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:57:59,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:57:59,384 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:57:59,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-12-02 15:57:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:57:59,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 15:57:59,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:58:00,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6506 backedges. 0 proven. 4812 refuted. 0 times theorem prover too weak. 1694 trivial. 0 not checked. [2023-12-02 15:58:00,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:58:02,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6506 backedges. 0 proven. 4812 refuted. 0 times theorem prover too weak. 1694 trivial. 0 not checked. [2023-12-02 15:58:02,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:58:02,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068209937] [2023-12-02 15:58:02,438 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:58:02,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017925894] [2023-12-02 15:58:02,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017925894] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:58:02,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1911094313] [2023-12-02 15:58:02,439 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 15:58:02,439 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:58:02,439 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:58:02,439 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:58:02,439 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:58:03,203 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 15:58:03,214 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:58:03,232 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:58:10,018 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1723389#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 15:58:10,019 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:58:10,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:58:10,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2023-12-02 15:58:10,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54257586] [2023-12-02 15:58:10,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:58:10,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 15:58:10,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:58:10,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 15:58:10,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2119, Unknown=0, NotChecked=0, Total=2352 [2023-12-02 15:58:10,021 INFO L87 Difference]: Start difference. First operand 78910 states and 86861 transitions. Second operand has 26 states, 25 states have (on average 13.64) internal successors, (341), 26 states have internal predecessors, (341), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2023-12-02 15:58:22,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:58:22,042 INFO L93 Difference]: Finished difference Result 92273 states and 101635 transitions. [2023-12-02 15:58:22,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-12-02 15:58:22,043 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 13.64) internal successors, (341), 26 states have internal predecessors, (341), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 515 [2023-12-02 15:58:22,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:58:22,135 INFO L225 Difference]: With dead ends: 92273 [2023-12-02 15:58:22,135 INFO L226 Difference]: Without dead ends: 92272 [2023-12-02 15:58:22,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1601 GetRequests, 1436 SyntacticMatches, 60 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4896 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1791, Invalid=9551, Unknown=0, NotChecked=0, Total=11342 [2023-12-02 15:58:22,144 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 499 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 2967 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 3131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 2967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:58:22,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 1167 Invalid, 3131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 2967 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-02 15:58:22,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92272 states. [2023-12-02 15:58:30,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92272 to 85759. [2023-12-02 15:58:30,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85759 states, 80397 states have (on average 1.040673159446248) internal successors, (83667), 80399 states have internal predecessors, (83667), 5356 states have call successors, (5356), 3 states have call predecessors, (5356), 3 states have return successors, (5356), 5356 states have call predecessors, (5356), 5356 states have call successors, (5356) [2023-12-02 15:58:30,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85759 states to 85759 states and 94379 transitions. [2023-12-02 15:58:30,228 INFO L78 Accepts]: Start accepts. Automaton has 85759 states and 94379 transitions. Word has length 515 [2023-12-02 15:58:30,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:58:30,228 INFO L495 AbstractCegarLoop]: Abstraction has 85759 states and 94379 transitions. [2023-12-02 15:58:30,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 13.64) internal successors, (341), 26 states have internal predecessors, (341), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2023-12-02 15:58:30,228 INFO L276 IsEmpty]: Start isEmpty. Operand 85759 states and 94379 transitions. [2023-12-02 15:58:30,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2023-12-02 15:58:30,244 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:58:30,245 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:58:30,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-12-02 15:58:30,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:58:30,445 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:58:30,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:58:30,446 INFO L85 PathProgramCache]: Analyzing trace with hash -632059295, now seen corresponding path program 20 times [2023-12-02 15:58:30,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:58:30,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70667396] [2023-12-02 15:58:30,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:58:30,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:58:30,463 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:58:30,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720842489] [2023-12-02 15:58:30,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:58:30,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:58:30,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:58:30,464 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:58:30,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-12-02 15:58:30,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2023-12-02 15:58:30,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:58:30,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 73 conjunts are in the unsatisfiable core [2023-12-02 15:58:30,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:58:31,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6106 backedges. 1253 proven. 278 refuted. 0 times theorem prover too weak. 4575 trivial. 0 not checked. [2023-12-02 15:58:31,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:58:31,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:58:31,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70667396] [2023-12-02 15:58:31,935 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:58:31,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720842489] [2023-12-02 15:58:31,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720842489] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:58:31,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1653603084] [2023-12-02 15:58:31,936 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 15:58:31,936 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:58:31,936 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:58:31,936 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:58:31,936 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:58:32,697 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 15:58:32,708 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:58:32,727 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:58:38,156 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1925440#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 15:58:38,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:58:38,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:58:38,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-12-02 15:58:38,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586690134] [2023-12-02 15:58:38,156 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 15:58:38,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 15:58:38,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:58:38,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 15:58:38,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1763, Unknown=0, NotChecked=0, Total=1980 [2023-12-02 15:58:38,158 INFO L87 Difference]: Start difference. First operand 85759 states and 94379 transitions. Second operand has 19 states, 17 states have (on average 5.352941176470588) internal successors, (91), 18 states have internal predecessors, (91), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 15:58:45,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:58:45,226 INFO L93 Difference]: Finished difference Result 119983 states and 132015 transitions. [2023-12-02 15:58:45,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 15:58:45,227 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 5.352941176470588) internal successors, (91), 18 states have internal predecessors, (91), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 515 [2023-12-02 15:58:45,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:58:45,307 INFO L225 Difference]: With dead ends: 119983 [2023-12-02 15:58:45,308 INFO L226 Difference]: Without dead ends: 70831 [2023-12-02 15:58:45,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1055 GetRequests, 928 SyntacticMatches, 70 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4079 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=382, Invalid=3040, Unknown=0, NotChecked=0, Total=3422 [2023-12-02 15:58:45,329 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 92 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:58:45,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 147 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:58:45,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70831 states. [2023-12-02 15:58:51,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70831 to 70830. [2023-12-02 15:58:51,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70830 states, 66399 states have (on average 1.0406030211298363) internal successors, (69095), 66401 states have internal predecessors, (69095), 4425 states have call successors, (4425), 3 states have call predecessors, (4425), 3 states have return successors, (4425), 4425 states have call predecessors, (4425), 4425 states have call successors, (4425) [2023-12-02 15:58:51,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70830 states to 70830 states and 77945 transitions. [2023-12-02 15:58:51,803 INFO L78 Accepts]: Start accepts. Automaton has 70830 states and 77945 transitions. Word has length 515 [2023-12-02 15:58:51,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:58:51,804 INFO L495 AbstractCegarLoop]: Abstraction has 70830 states and 77945 transitions. [2023-12-02 15:58:51,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 5.352941176470588) internal successors, (91), 18 states have internal predecessors, (91), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 15:58:51,804 INFO L276 IsEmpty]: Start isEmpty. Operand 70830 states and 77945 transitions. [2023-12-02 15:58:51,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2023-12-02 15:58:51,813 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:58:51,813 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 27, 27, 27, 27, 27, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:58:51,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-12-02 15:58:52,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-12-02 15:58:52,014 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:58:52,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:58:52,014 INFO L85 PathProgramCache]: Analyzing trace with hash -2020269871, now seen corresponding path program 21 times [2023-12-02 15:58:52,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:58:52,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710659959] [2023-12-02 15:58:52,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:58:52,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:58:52,031 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:58:52,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2139528550] [2023-12-02 15:58:52,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:58:52,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:58:52,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:58:52,032 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:58:52,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-12-02 15:58:52,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:58:52,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:58:52,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 15:58:52,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:58:53,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7181 backedges. 2755 proven. 3612 refuted. 0 times theorem prover too weak. 814 trivial. 0 not checked. [2023-12-02 15:58:53,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:58:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7181 backedges. 2755 proven. 3612 refuted. 0 times theorem prover too weak. 814 trivial. 0 not checked. [2023-12-02 15:58:53,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:58:53,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710659959] [2023-12-02 15:58:53,821 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:58:53,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139528550] [2023-12-02 15:58:53,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139528550] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:58:53,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1156452976] [2023-12-02 15:58:53,822 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 15:58:53,822 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:58:53,823 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:58:53,823 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:58:53,823 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:58:54,681 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 15:58:54,691 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:58:54,710 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:59:00,766 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2143424#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 15:59:00,766 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:59:00,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:59:00,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 51 [2023-12-02 15:59:00,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974442391] [2023-12-02 15:59:00,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:59:00,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-02 15:59:00,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:59:00,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-02 15:59:00,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=904, Invalid=4498, Unknown=0, NotChecked=0, Total=5402 [2023-12-02 15:59:00,770 INFO L87 Difference]: Start difference. First operand 70830 states and 77945 transitions. Second operand has 51 states, 51 states have (on average 14.0) internal successors, (714), 51 states have internal predecessors, (714), 48 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 48 states have call predecessors, (49), 48 states have call successors, (49) [2023-12-02 15:59:17,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:59:17,399 INFO L93 Difference]: Finished difference Result 185906 states and 206035 transitions. [2023-12-02 15:59:17,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-12-02 15:59:17,399 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 14.0) internal successors, (714), 51 states have internal predecessors, (714), 48 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 48 states have call predecessors, (49), 48 states have call successors, (49) Word has length 533 [2023-12-02 15:59:17,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:59:17,581 INFO L225 Difference]: With dead ends: 185906 [2023-12-02 15:59:17,581 INFO L226 Difference]: Without dead ends: 149065 [2023-12-02 15:59:17,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1635 GetRequests, 1454 SyntacticMatches, 71 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10288 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=2137, Invalid=10295, Unknown=0, NotChecked=0, Total=12432 [2023-12-02 15:59:17,607 INFO L413 NwaCegarLoop]: 434 mSDtfsCounter, 401 mSDsluCounter, 2132 mSDsCounter, 0 mSdLazyCounter, 4958 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 2566 SdHoareTripleChecker+Invalid, 4983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 4958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:59:17,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 2566 Invalid, 4983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 4958 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-02 15:59:17,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149065 states. [2023-12-02 15:59:28,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149065 to 94019. [2023-12-02 15:59:28,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94019 states, 88142 states have (on average 1.0312677270767625) internal successors, (90898), 88144 states have internal predecessors, (90898), 5871 states have call successors, (5871), 3 states have call predecessors, (5871), 3 states have return successors, (5871), 5871 states have call predecessors, (5871), 5871 states have call successors, (5871) [2023-12-02 15:59:29,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94019 states to 94019 states and 102640 transitions. [2023-12-02 15:59:29,001 INFO L78 Accepts]: Start accepts. Automaton has 94019 states and 102640 transitions. Word has length 533 [2023-12-02 15:59:29,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:59:29,002 INFO L495 AbstractCegarLoop]: Abstraction has 94019 states and 102640 transitions. [2023-12-02 15:59:29,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 14.0) internal successors, (714), 51 states have internal predecessors, (714), 48 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 48 states have call predecessors, (49), 48 states have call successors, (49) [2023-12-02 15:59:29,002 INFO L276 IsEmpty]: Start isEmpty. Operand 94019 states and 102640 transitions. [2023-12-02 15:59:29,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2023-12-02 15:59:29,018 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:59:29,018 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 24, 24, 24, 24, 24, 8, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:59:29,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-12-02 15:59:29,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-12-02 15:59:29,218 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 15:59:29,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:59:29,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1841017413, now seen corresponding path program 22 times [2023-12-02 15:59:29,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:59:29,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385384888] [2023-12-02 15:59:29,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:59:29,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:59:29,238 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:59:29,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046500706] [2023-12-02 15:59:29,239 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 15:59:29,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:59:29,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:59:29,239 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:59:29,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-12-02 15:59:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:59:29,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 15:59:29,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:59:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8258 backedges. 0 proven. 6676 refuted. 0 times theorem prover too weak. 1582 trivial. 0 not checked. [2023-12-02 15:59:30,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:59:33,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8258 backedges. 0 proven. 6676 refuted. 0 times theorem prover too weak. 1582 trivial. 0 not checked. [2023-12-02 15:59:33,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:59:33,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385384888] [2023-12-02 15:59:33,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:59:33,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046500706] [2023-12-02 15:59:33,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046500706] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:59:33,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1685919196] [2023-12-02 15:59:33,952 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 15:59:33,952 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:59:33,952 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:59:33,952 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:59:33,953 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:59:34,730 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 15:59:34,741 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 15:59:34,760 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:59:42,645 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2461922#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 15:59:42,645 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:59:42,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:59:42,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2023-12-02 15:59:42,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774085822] [2023-12-02 15:59:42,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:59:42,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 15:59:42,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:59:42,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 15:59:42,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=2293, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 15:59:42,648 INFO L87 Difference]: Start difference. First operand 94019 states and 102640 transitions. Second operand has 28 states, 27 states have (on average 15.222222222222221) internal successors, (411), 28 states have internal predecessors, (411), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2023-12-02 15:59:57,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:59:57,981 INFO L93 Difference]: Finished difference Result 122417 states and 133684 transitions. [2023-12-02 15:59:57,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-12-02 15:59:57,982 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 15.222222222222221) internal successors, (411), 28 states have internal predecessors, (411), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) Word has length 587 [2023-12-02 15:59:57,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:59:58,111 INFO L225 Difference]: With dead ends: 122417 [2023-12-02 15:59:58,112 INFO L226 Difference]: Without dead ends: 122416 [2023-12-02 15:59:58,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1810 GetRequests, 1638 SyntacticMatches, 72 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4639 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=1592, Invalid=8710, Unknown=0, NotChecked=0, Total=10302 [2023-12-02 15:59:58,125 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 404 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 3099 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 1397 SdHoareTripleChecker+Invalid, 3248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 3099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:59:58,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 1397 Invalid, 3248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 3099 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-02 15:59:58,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122416 states. [2023-12-02 16:00:10,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122416 to 118784. [2023-12-02 16:00:10,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118784 states, 111359 states have (on average 1.0307204626478328) internal successors, (114780), 111361 states have internal predecessors, (114780), 7419 states have call successors, (7419), 3 states have call predecessors, (7419), 3 states have return successors, (7419), 7419 states have call predecessors, (7419), 7419 states have call successors, (7419) [2023-12-02 16:00:10,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118784 states to 118784 states and 129618 transitions. [2023-12-02 16:00:10,602 INFO L78 Accepts]: Start accepts. Automaton has 118784 states and 129618 transitions. Word has length 587 [2023-12-02 16:00:10,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:00:10,602 INFO L495 AbstractCegarLoop]: Abstraction has 118784 states and 129618 transitions. [2023-12-02 16:00:10,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 15.222222222222221) internal successors, (411), 28 states have internal predecessors, (411), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2023-12-02 16:00:10,603 INFO L276 IsEmpty]: Start isEmpty. Operand 118784 states and 129618 transitions. [2023-12-02 16:00:10,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 678 [2023-12-02 16:00:10,623 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:00:10,623 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 34, 34, 34, 34, 34, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:00:10,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-12-02 16:00:10,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-12-02 16:00:10,824 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 16:00:10,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:00:10,824 INFO L85 PathProgramCache]: Analyzing trace with hash 497912923, now seen corresponding path program 23 times [2023-12-02 16:00:10,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:00:10,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346503223] [2023-12-02 16:00:10,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:00:10,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:00:10,846 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:00:10,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386703336] [2023-12-02 16:00:10,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:00:10,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:00:10,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:00:10,847 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:00:10,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-12-02 16:00:11,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-12-02 16:00:11,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:00:11,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 16:00:11,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:00:12,082 INFO L134 CoverageAnalysis]: Checked inductivity of 11693 backedges. 4478 proven. 875 refuted. 0 times theorem prover too weak. 6340 trivial. 0 not checked. [2023-12-02 16:00:12,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:00:12,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:00:12,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346503223] [2023-12-02 16:00:12,235 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:00:12,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386703336] [2023-12-02 16:00:12,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386703336] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:00:12,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1710381115] [2023-12-02 16:00:12,237 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 16:00:12,237 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:00:12,237 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:00:12,237 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:00:12,237 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:00:13,021 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 16:00:13,035 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 16:00:13,054 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:00:20,272 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2735508#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 16:00:20,272 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:00:20,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:00:20,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-12-02 16:00:20,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106382433] [2023-12-02 16:00:20,273 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 16:00:20,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 16:00:20,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:00:20,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 16:00:20,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1571, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 16:00:20,274 INFO L87 Difference]: Start difference. First operand 118784 states and 129618 transitions. Second operand has 16 states, 15 states have (on average 13.0) internal successors, (195), 16 states have internal predecessors, (195), 12 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2023-12-02 16:00:33,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:00:33,700 INFO L93 Difference]: Finished difference Result 199958 states and 218578 transitions. [2023-12-02 16:00:33,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 16:00:33,701 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 13.0) internal successors, (195), 16 states have internal predecessors, (195), 12 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 677 [2023-12-02 16:00:33,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:00:33,829 INFO L225 Difference]: With dead ends: 199958 [2023-12-02 16:00:33,829 INFO L226 Difference]: Without dead ends: 118791 [2023-12-02 16:00:33,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1377 GetRequests, 1248 SyntacticMatches, 77 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2463 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=243, Invalid=2619, Unknown=0, NotChecked=0, Total=2862 [2023-12-02 16:00:33,863 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 295 mSDsluCounter, 1737 mSDsCounter, 0 mSdLazyCounter, 3317 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 1919 SdHoareTripleChecker+Invalid, 3342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 3317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:00:33,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 1919 Invalid, 3342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 3317 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 16:00:33,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118791 states. [2023-12-02 16:00:45,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118791 to 118784. [2023-12-02 16:00:45,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118784 states, 111359 states have (on average 1.0300469652205928) internal successors, (114705), 111361 states have internal predecessors, (114705), 7419 states have call successors, (7419), 3 states have call predecessors, (7419), 3 states have return successors, (7419), 7419 states have call predecessors, (7419), 7419 states have call successors, (7419) [2023-12-02 16:00:45,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118784 states to 118784 states and 129543 transitions. [2023-12-02 16:00:45,592 INFO L78 Accepts]: Start accepts. Automaton has 118784 states and 129543 transitions. Word has length 677 [2023-12-02 16:00:45,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:00:45,592 INFO L495 AbstractCegarLoop]: Abstraction has 118784 states and 129543 transitions. [2023-12-02 16:00:45,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 13.0) internal successors, (195), 16 states have internal predecessors, (195), 12 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2023-12-02 16:00:45,592 INFO L276 IsEmpty]: Start isEmpty. Operand 118784 states and 129543 transitions. [2023-12-02 16:00:45,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 696 [2023-12-02 16:00:45,611 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:00:45,612 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 36, 36, 36, 36, 36, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:00:45,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-12-02 16:00:45,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-12-02 16:00:45,812 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 16:00:45,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:00:45,812 INFO L85 PathProgramCache]: Analyzing trace with hash 826231161, now seen corresponding path program 24 times [2023-12-02 16:00:45,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:00:45,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341945548] [2023-12-02 16:00:45,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:00:45,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:00:45,835 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:00:45,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227800261] [2023-12-02 16:00:45,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 16:00:45,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:00:45,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:00:45,836 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:00:45,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-12-02 16:00:46,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 16:00:46,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:00:46,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 1082 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-02 16:00:46,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:00:47,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12482 backedges. 0 proven. 8410 refuted. 0 times theorem prover too weak. 4072 trivial. 0 not checked. [2023-12-02 16:00:47,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:00:47,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:00:47,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341945548] [2023-12-02 16:00:47,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:00:47,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227800261] [2023-12-02 16:00:47,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227800261] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:00:47,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1648147939] [2023-12-02 16:00:47,596 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 16:00:47,596 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:00:47,596 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:00:47,596 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:00:47,597 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:00:48,633 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 16:00:48,644 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 16:00:48,662 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:00:56,528 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3096321#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 16:00:56,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:00:56,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:00:56,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-12-02 16:00:56,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492621767] [2023-12-02 16:00:56,529 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 16:00:56,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 16:00:56,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:00:56,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 16:00:56,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2190, Unknown=0, NotChecked=0, Total=2352 [2023-12-02 16:00:56,531 INFO L87 Difference]: Start difference. First operand 118784 states and 129543 transitions. Second operand has 24 states, 23 states have (on average 13.565217391304348) internal successors, (312), 24 states have internal predecessors, (312), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2023-12-02 16:01:09,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:01:09,699 INFO L93 Difference]: Finished difference Result 120301 states and 131210 transitions. [2023-12-02 16:01:09,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 16:01:09,700 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 13.565217391304348) internal successors, (312), 24 states have internal predecessors, (312), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 695 [2023-12-02 16:01:09,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:01:09,825 INFO L225 Difference]: With dead ends: 120301 [2023-12-02 16:01:09,825 INFO L226 Difference]: Without dead ends: 120300 [2023-12-02 16:01:09,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1402 GetRequests, 1276 SyntacticMatches, 78 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1955 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=170, Invalid=2280, Unknown=0, NotChecked=0, Total=2450 [2023-12-02 16:01:09,835 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 49 mSDsluCounter, 2164 mSDsCounter, 0 mSdLazyCounter, 6171 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2299 SdHoareTripleChecker+Invalid, 6171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:01:09,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 2299 Invalid, 6171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6171 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-02 16:01:09,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120300 states. [2023-12-02 16:01:21,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120300 to 119072. [2023-12-02 16:01:21,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119072 states, 111629 states have (on average 1.0299742898350788) internal successors, (114975), 111631 states have internal predecessors, (114975), 7437 states have call successors, (7437), 3 states have call predecessors, (7437), 3 states have return successors, (7437), 7437 states have call predecessors, (7437), 7437 states have call successors, (7437) [2023-12-02 16:01:21,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119072 states to 119072 states and 129849 transitions. [2023-12-02 16:01:21,465 INFO L78 Accepts]: Start accepts. Automaton has 119072 states and 129849 transitions. Word has length 695 [2023-12-02 16:01:21,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:01:21,465 INFO L495 AbstractCegarLoop]: Abstraction has 119072 states and 129849 transitions. [2023-12-02 16:01:21,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 13.565217391304348) internal successors, (312), 24 states have internal predecessors, (312), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2023-12-02 16:01:21,465 INFO L276 IsEmpty]: Start isEmpty. Operand 119072 states and 129849 transitions. [2023-12-02 16:01:21,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2023-12-02 16:01:21,486 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:01:21,486 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 38, 38, 38, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:01:21,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-12-02 16:01:21,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-12-02 16:01:21,686 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 16:01:21,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:01:21,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1270239911, now seen corresponding path program 4 times [2023-12-02 16:01:21,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:01:21,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153804832] [2023-12-02 16:01:21,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:01:21,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:01:21,708 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:01:21,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867045638] [2023-12-02 16:01:21,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 16:01:21,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:01:21,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:01:21,710 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:01:21,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-12-02 16:01:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:01:21,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 1209 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-02 16:01:21,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:01:22,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13264 backedges. 0 proven. 11780 refuted. 0 times theorem prover too weak. 1484 trivial. 0 not checked. [2023-12-02 16:01:22,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:01:25,108 INFO L134 CoverageAnalysis]: Checked inductivity of 13264 backedges. 0 proven. 11780 refuted. 0 times theorem prover too weak. 1484 trivial. 0 not checked. [2023-12-02 16:01:25,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:01:25,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153804832] [2023-12-02 16:01:25,109 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:01:25,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867045638] [2023-12-02 16:01:25,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867045638] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:01:25,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1063800856] [2023-12-02 16:01:25,110 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 16:01:25,110 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:01:25,110 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:01:25,111 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:01:25,111 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:01:25,700 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 16:01:25,708 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 16:01:25,727 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:01:27,944 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3369989#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~x2~0#1| 1) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483647 |ULTIMATE.start_main_~y1~0#1|))' at error location [2023-12-02 16:01:27,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:01:27,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 16:01:27,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 79 [2023-12-02 16:01:27,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283112852] [2023-12-02 16:01:27,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 16:01:27,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-12-02 16:01:27,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:01:27,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-12-02 16:01:27,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3241, Invalid=6461, Unknown=0, NotChecked=0, Total=9702 [2023-12-02 16:01:27,948 INFO L87 Difference]: Start difference. First operand 119072 states and 129849 transitions. Second operand has 80 states, 79 states have (on average 14.822784810126583) internal successors, (1171), 80 states have internal predecessors, (1171), 79 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 79 states have call predecessors, (80), 79 states have call successors, (80) [2023-12-02 16:01:47,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:01:47,968 INFO L93 Difference]: Finished difference Result 189587 states and 206969 transitions. [2023-12-02 16:01:47,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-12-02 16:01:47,968 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 14.822784810126583) internal successors, (1171), 80 states have internal predecessors, (1171), 79 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 79 states have call predecessors, (80), 79 states have call successors, (80) Word has length 708 [2023-12-02 16:01:47,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:01:48,169 INFO L225 Difference]: With dead ends: 189587 [2023-12-02 16:01:48,169 INFO L226 Difference]: Without dead ends: 189586 [2023-12-02 16:01:48,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2122 GetRequests, 2025 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2294 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3241, Invalid=6461, Unknown=0, NotChecked=0, Total=9702 [2023-12-02 16:01:48,184 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1621 mSDsluCounter, 1060 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1621 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:01:48,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1621 Valid, 1081 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 16:01:48,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189586 states. [2023-12-02 16:02:06,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189586 to 189432. [2023-12-02 16:02:06,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189432 states, 177589 states have (on average 1.030103215852333) internal successors, (182935), 177591 states have internal predecessors, (182935), 11837 states have call successors, (11837), 3 states have call predecessors, (11837), 3 states have return successors, (11837), 11837 states have call predecessors, (11837), 11837 states have call successors, (11837) [2023-12-02 16:02:07,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189432 states to 189432 states and 206609 transitions. [2023-12-02 16:02:07,215 INFO L78 Accepts]: Start accepts. Automaton has 189432 states and 206609 transitions. Word has length 708 [2023-12-02 16:02:07,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:02:07,216 INFO L495 AbstractCegarLoop]: Abstraction has 189432 states and 206609 transitions. [2023-12-02 16:02:07,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 14.822784810126583) internal successors, (1171), 80 states have internal predecessors, (1171), 79 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 79 states have call predecessors, (80), 79 states have call successors, (80) [2023-12-02 16:02:07,216 INFO L276 IsEmpty]: Start isEmpty. Operand 189432 states and 206609 transitions. [2023-12-02 16:02:07,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 714 [2023-12-02 16:02:07,236 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:02:07,237 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 37, 37, 37, 37, 37, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:02:07,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-12-02 16:02:07,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-12-02 16:02:07,437 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 16:02:07,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:02:07,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1076554911, now seen corresponding path program 25 times [2023-12-02 16:02:07,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:02:07,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93026982] [2023-12-02 16:02:07,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:02:07,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:02:07,459 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:02:07,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398555662] [2023-12-02 16:02:07,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 16:02:07,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:02:07,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:02:07,460 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:02:07,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-12-02 16:02:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:02:07,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 1109 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-02 16:02:07,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:02:08,979 INFO L134 CoverageAnalysis]: Checked inductivity of 13161 backedges. 3085 proven. 8592 refuted. 0 times theorem prover too weak. 1484 trivial. 0 not checked. [2023-12-02 16:02:08,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:02:10,039 INFO L134 CoverageAnalysis]: Checked inductivity of 13161 backedges. 3085 proven. 8592 refuted. 0 times theorem prover too weak. 1484 trivial. 0 not checked. [2023-12-02 16:02:10,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:02:10,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93026982] [2023-12-02 16:02:10,039 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:02:10,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398555662] [2023-12-02 16:02:10,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398555662] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:02:10,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [515878645] [2023-12-02 16:02:10,041 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 16:02:10,041 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:02:10,041 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:02:10,041 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:02:10,041 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:02:11,027 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 16:02:11,037 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 16:02:11,056 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:02:18,712 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3800756#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 16:02:18,712 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:02:18,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 16:02:18,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 61 [2023-12-02 16:02:18,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238952731] [2023-12-02 16:02:18,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 16:02:18,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-12-02 16:02:18,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:02:18,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-12-02 16:02:18,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=976, Invalid=5996, Unknown=0, NotChecked=0, Total=6972 [2023-12-02 16:02:18,715 INFO L87 Difference]: Start difference. First operand 189432 states and 206609 transitions. Second operand has 61 states, 61 states have (on average 14.360655737704919) internal successors, (876), 61 states have internal predecessors, (876), 59 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 59 states have call predecessors, (60), 59 states have call successors, (60) [2023-12-02 16:02:46,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:02:46,556 INFO L93 Difference]: Finished difference Result 349367 states and 382720 transitions. [2023-12-02 16:02:46,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-02 16:02:46,557 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 14.360655737704919) internal successors, (876), 61 states have internal predecessors, (876), 59 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 59 states have call predecessors, (60), 59 states have call successors, (60) Word has length 713 [2023-12-02 16:02:46,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:02:47,024 INFO L225 Difference]: With dead ends: 349367 [2023-12-02 16:02:47,024 INFO L226 Difference]: Without dead ends: 271972 [2023-12-02 16:02:47,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2157 GetRequests, 1954 SyntacticMatches, 101 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13642 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1626, Invalid=9086, Unknown=0, NotChecked=0, Total=10712 [2023-12-02 16:02:47,076 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 88 mSDsluCounter, 2859 mSDsCounter, 0 mSdLazyCounter, 5679 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 3193 SdHoareTripleChecker+Invalid, 5681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:02:47,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 3193 Invalid, 5681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5679 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-02 16:02:47,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271972 states. [2023-12-02 16:03:09,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271972 to 222301. [2023-12-02 16:03:09,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222301 states, 208406 states have (on average 1.026016525435928) internal successors, (213828), 208408 states have internal predecessors, (213828), 13889 states have call successors, (13889), 3 states have call predecessors, (13889), 3 states have return successors, (13889), 13889 states have call predecessors, (13889), 13889 states have call successors, (13889) [2023-12-02 16:03:09,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222301 states to 222301 states and 241606 transitions. [2023-12-02 16:03:09,778 INFO L78 Accepts]: Start accepts. Automaton has 222301 states and 241606 transitions. Word has length 713 [2023-12-02 16:03:09,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:09,779 INFO L495 AbstractCegarLoop]: Abstraction has 222301 states and 241606 transitions. [2023-12-02 16:03:09,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 14.360655737704919) internal successors, (876), 61 states have internal predecessors, (876), 59 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 59 states have call predecessors, (60), 59 states have call successors, (60) [2023-12-02 16:03:09,779 INFO L276 IsEmpty]: Start isEmpty. Operand 222301 states and 241606 transitions. [2023-12-02 16:03:09,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 714 [2023-12-02 16:03:09,812 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:09,812 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 36, 36, 36, 36, 36, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:09,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-12-02 16:03:10,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:10,013 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 16:03:10,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:10,013 INFO L85 PathProgramCache]: Analyzing trace with hash 2042293931, now seen corresponding path program 26 times [2023-12-02 16:03:10,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:10,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055578432] [2023-12-02 16:03:10,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:10,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:10,042 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:03:10,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577897740] [2023-12-02 16:03:10,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:03:10,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:10,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:03:10,044 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:03:10,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-12-02 16:03:10,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2023-12-02 16:03:10,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:03:10,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 16:03:10,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:03:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 13025 backedges. 5077 proven. 1050 refuted. 0 times theorem prover too weak. 6898 trivial. 0 not checked. [2023-12-02 16:03:10,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:03:10,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:10,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055578432] [2023-12-02 16:03:10,819 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:03:10,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577897740] [2023-12-02 16:03:10,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577897740] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:03:10,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [549655437] [2023-12-02 16:03:10,820 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 16:03:10,820 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:03:10,820 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:03:10,821 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:03:10,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:03:11,826 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 16:03:11,843 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 16:03:11,862 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:03:19,256 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4446029#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 16:03:19,256 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:03:19,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:03:19,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-12-02 16:03:19,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976999810] [2023-12-02 16:03:19,257 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 16:03:19,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 16:03:19,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:19,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 16:03:19,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1653, Unknown=0, NotChecked=0, Total=1806 [2023-12-02 16:03:19,258 INFO L87 Difference]: Start difference. First operand 222301 states and 241606 transitions. Second operand has 17 states, 16 states have (on average 13.125) internal successors, (210), 17 states have internal predecessors, (210), 13 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2023-12-02 16:03:43,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:43,132 INFO L93 Difference]: Finished difference Result 385072 states and 418871 transitions. [2023-12-02 16:03:43,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-02 16:03:43,132 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 13.125) internal successors, (210), 17 states have internal predecessors, (210), 13 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 713 [2023-12-02 16:03:43,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:43,412 INFO L225 Difference]: With dead ends: 385072 [2023-12-02 16:03:43,412 INFO L226 Difference]: Without dead ends: 222308 [2023-12-02 16:03:43,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1450 GetRequests, 1315 SyntacticMatches, 81 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2597 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=241, Invalid=2839, Unknown=0, NotChecked=0, Total=3080 [2023-12-02 16:03:43,476 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 237 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 3650 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 2143 SdHoareTripleChecker+Invalid, 3671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 3650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:43,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 2143 Invalid, 3671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 3650 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 16:03:43,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222308 states. [2023-12-02 16:04:05,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222308 to 222301. [2023-12-02 16:04:05,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222301 states, 208406 states have (on average 1.0254647179063943) internal successors, (213713), 208408 states have internal predecessors, (213713), 13889 states have call successors, (13889), 3 states have call predecessors, (13889), 3 states have return successors, (13889), 13889 states have call predecessors, (13889), 13889 states have call successors, (13889) [2023-12-02 16:04:06,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222301 states to 222301 states and 241491 transitions. [2023-12-02 16:04:06,202 INFO L78 Accepts]: Start accepts. Automaton has 222301 states and 241491 transitions. Word has length 713 [2023-12-02 16:04:06,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:04:06,203 INFO L495 AbstractCegarLoop]: Abstraction has 222301 states and 241491 transitions. [2023-12-02 16:04:06,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 13.125) internal successors, (210), 17 states have internal predecessors, (210), 13 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2023-12-02 16:04:06,203 INFO L276 IsEmpty]: Start isEmpty. Operand 222301 states and 241491 transitions. [2023-12-02 16:04:06,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2023-12-02 16:04:06,224 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:04:06,225 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 38, 38, 38, 38, 38, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:04:06,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-12-02 16:04:06,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-12-02 16:04:06,425 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 16:04:06,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:04:06,426 INFO L85 PathProgramCache]: Analyzing trace with hash -685247287, now seen corresponding path program 27 times [2023-12-02 16:04:06,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:04:06,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801710645] [2023-12-02 16:04:06,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:04:06,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:04:06,447 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:04:06,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205238053] [2023-12-02 16:04:06,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 16:04:06,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:04:06,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:04:06,448 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:04:06,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-12-02 16:04:06,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 16:04:06,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:04:06,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-02 16:04:06,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:04:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 13858 backedges. 0 proven. 9332 refuted. 0 times theorem prover too weak. 4526 trivial. 0 not checked. [2023-12-02 16:04:08,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:04:08,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:04:08,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801710645] [2023-12-02 16:04:08,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:04:08,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205238053] [2023-12-02 16:04:08,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205238053] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:04:08,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1584857830] [2023-12-02 16:04:08,492 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 16:04:08,492 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:04:08,492 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:04:08,492 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:04:08,493 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:04:09,296 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 16:04:09,307 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 16:04:09,325 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:04:17,375 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5131679#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 16:04:17,375 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:04:17,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:04:17,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-12-02 16:04:17,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120684076] [2023-12-02 16:04:17,375 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 16:04:17,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 16:04:17,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:04:17,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 16:04:17,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2286, Unknown=0, NotChecked=0, Total=2450 [2023-12-02 16:04:17,377 INFO L87 Difference]: Start difference. First operand 222301 states and 241491 transitions. Second operand has 25 states, 24 states have (on average 13.625) internal successors, (327), 25 states have internal predecessors, (327), 22 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2023-12-02 16:04:39,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:04:39,521 INFO L93 Difference]: Finished difference Result 223816 states and 243154 transitions. [2023-12-02 16:04:39,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-02 16:04:39,522 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 13.625) internal successors, (327), 25 states have internal predecessors, (327), 22 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) Word has length 731 [2023-12-02 16:04:39,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:04:39,782 INFO L225 Difference]: With dead ends: 223816 [2023-12-02 16:04:39,783 INFO L226 Difference]: Without dead ends: 223815 [2023-12-02 16:04:39,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1474 GetRequests, 1343 SyntacticMatches, 82 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2041 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=172, Invalid=2378, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 16:04:39,804 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 50 mSDsluCounter, 2376 mSDsCounter, 0 mSdLazyCounter, 6728 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 2517 SdHoareTripleChecker+Invalid, 6728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 16:04:39,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 2517 Invalid, 6728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6728 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 16:04:39,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223815 states. [2023-12-02 16:05:01,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223815 to 222605. [2023-12-02 16:05:01,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222605 states, 208691 states have (on average 1.0254299418757877) internal successors, (213998), 208693 states have internal predecessors, (213998), 13908 states have call successors, (13908), 3 states have call predecessors, (13908), 3 states have return successors, (13908), 13908 states have call predecessors, (13908), 13908 states have call successors, (13908) [2023-12-02 16:05:02,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222605 states to 222605 states and 241814 transitions. [2023-12-02 16:05:02,263 INFO L78 Accepts]: Start accepts. Automaton has 222605 states and 241814 transitions. Word has length 731 [2023-12-02 16:05:02,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:05:02,263 INFO L495 AbstractCegarLoop]: Abstraction has 222605 states and 241814 transitions. [2023-12-02 16:05:02,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 13.625) internal successors, (327), 25 states have internal predecessors, (327), 22 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2023-12-02 16:05:02,263 INFO L276 IsEmpty]: Start isEmpty. Operand 222605 states and 241814 transitions. [2023-12-02 16:05:02,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2023-12-02 16:05:02,286 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:05:02,286 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 39, 39, 39, 39, 39, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:05:02,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-12-02 16:05:02,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-12-02 16:05:02,487 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 16:05:02,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:05:02,487 INFO L85 PathProgramCache]: Analyzing trace with hash 342158001, now seen corresponding path program 28 times [2023-12-02 16:05:02,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:05:02,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811635148] [2023-12-02 16:05:02,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:05:02,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:05:02,521 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:05:02,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479487603] [2023-12-02 16:05:02,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 16:05:02,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:05:02,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:05:02,522 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:05:02,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21195334-a9ba-4086-9173-e35362faf27d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-12-02 16:05:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:05:02,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 1163 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-02 16:05:02,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:05:04,431 INFO L134 CoverageAnalysis]: Checked inductivity of 14573 backedges. 3407 proven. 9524 refuted. 0 times theorem prover too weak. 1642 trivial. 0 not checked. [2023-12-02 16:05:04,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:05:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 14573 backedges. 3407 proven. 9524 refuted. 0 times theorem prover too weak. 1642 trivial. 0 not checked. [2023-12-02 16:05:05,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:05:05,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811635148] [2023-12-02 16:05:05,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:05:05,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479487603] [2023-12-02 16:05:05,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479487603] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:05:05,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2139970385] [2023-12-02 16:05:05,631 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 16:05:05,631 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:05:05,631 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:05:05,631 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:05:05,631 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:05:06,382 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 16:05:06,392 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 16:05:06,411 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:05:12,133 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5638517#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 16:05:12,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:05:12,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 16:05:12,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 64 [2023-12-02 16:05:12,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861389790] [2023-12-02 16:05:12,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 16:05:12,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-12-02 16:05:12,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:05:12,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-12-02 16:05:12,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1061, Invalid=6421, Unknown=0, NotChecked=0, Total=7482 [2023-12-02 16:05:12,136 INFO L87 Difference]: Start difference. First operand 222605 states and 241814 transitions. Second operand has 64 states, 64 states have (on average 14.390625) internal successors, (921), 64 states have internal predecessors, (921), 62 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 62 states have call predecessors, (63), 62 states have call successors, (63) [2023-12-02 16:05:43,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:05:43,166 INFO L93 Difference]: Finished difference Result 382310 states and 417483 transitions. [2023-12-02 16:05:43,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-02 16:05:43,167 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 14.390625) internal successors, (921), 64 states have internal predecessors, (921), 62 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 62 states have call predecessors, (63), 62 states have call successors, (63) Word has length 749 [2023-12-02 16:05:43,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:05:43,546 INFO L225 Difference]: With dead ends: 382310 [2023-12-02 16:05:43,546 INFO L226 Difference]: Without dead ends: 304915 [2023-12-02 16:05:43,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2266 GetRequests, 2097 SyntacticMatches, 63 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9693 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1775, Invalid=9781, Unknown=0, NotChecked=0, Total=11556 [2023-12-02 16:05:43,600 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 91 mSDsluCounter, 1923 mSDsCounter, 0 mSdLazyCounter, 3904 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 2271 SdHoareTripleChecker+Invalid, 3906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:05:43,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 2271 Invalid, 3906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3904 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-02 16:05:43,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304915 states.