./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_valuebound1.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_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/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_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_valuebound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/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_091d17e2-f72a-42c6-89e8-caa76d751bb0/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 16:59:28,955 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:59:29,020 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-12-02 16:59:29,025 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:59:29,025 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:59:29,050 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:59:29,050 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:59:29,051 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:59:29,051 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:59:29,052 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:59:29,052 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:59:29,053 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:59:29,053 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:59:29,054 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:59:29,054 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:59:29,055 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:59:29,055 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:59:29,056 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:59:29,056 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:59:29,057 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:59:29,057 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:59:29,061 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:59:29,062 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:59:29,062 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:59:29,063 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 16:59:29,063 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:59:29,063 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 16:59:29,064 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:59:29,064 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:59:29,065 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:59:29,065 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:59:29,065 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-12-02 16:59:29,065 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 16:59:29,066 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 16:59:29,066 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:59:29,066 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:59:29,066 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:59:29,067 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:59:29,067 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:59:29,067 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:59:29,067 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:59:29,068 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:59:29,068 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:59:29,068 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:59:29,068 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:59:29,068 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:59:29,068 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:59:29,069 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:59:29,069 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:59:29,069 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_091d17e2-f72a-42c6-89e8-caa76d751bb0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f0dc25e497896e48962fc4f59a3ea4856b5eb0408b9845e68b04a0b0a132067 [2023-12-02 16:59:29,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:59:29,337 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:59:29,340 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:59:29,341 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:59:29,341 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:59:29,343 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_valuebound1.c [2023-12-02 16:59:32,204 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:59:32,390 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:59:32,391 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/sv-benchmarks/c/nla-digbench-scaling/mannadiv_valuebound1.c [2023-12-02 16:59:32,399 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/data/3868a4dac/cb634db9d66c4fe49cd6907d697c0ead/FLAG4960b9c64 [2023-12-02 16:59:32,412 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/data/3868a4dac/cb634db9d66c4fe49cd6907d697c0ead [2023-12-02 16:59:32,415 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:59:32,416 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:59:32,417 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:59:32,417 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:59:32,423 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:59:32,423 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:59:32" (1/1) ... [2023-12-02 16:59:32,425 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@262a8ad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:32, skipping insertion in model container [2023-12-02 16:59:32,425 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:59:32" (1/1) ... [2023-12-02 16:59:32,449 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:59:32,619 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:59:32,631 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:59:32,652 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:59:32,671 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:59:32,671 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:32 WrapperNode [2023-12-02 16:59:32,671 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:59:32,673 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:59:32,673 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:59:32,673 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:59:32,682 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:32" (1/1) ... [2023-12-02 16:59:32,690 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:32" (1/1) ... [2023-12-02 16:59:32,713 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 69 [2023-12-02 16:59:32,714 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:59:32,715 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:59:32,715 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:59:32,715 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:59:32,727 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:32" (1/1) ... [2023-12-02 16:59:32,727 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:32" (1/1) ... [2023-12-02 16:59:32,729 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:32" (1/1) ... [2023-12-02 16:59:32,729 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:32" (1/1) ... [2023-12-02 16:59:32,733 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:32" (1/1) ... [2023-12-02 16:59:32,737 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:32" (1/1) ... [2023-12-02 16:59:32,739 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:32" (1/1) ... [2023-12-02 16:59:32,740 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:32" (1/1) ... [2023-12-02 16:59:32,742 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:59:32,743 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:59:32,743 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:59:32,744 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:59:32,745 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:32" (1/1) ... [2023-12-02 16:59:32,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:59:32,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:59:32,781 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:59:32,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:59:32,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:59:32,829 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 16:59:32,829 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 16:59:32,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:59:32,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:59:32,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:59:32,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 16:59:32,831 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 16:59:32,907 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:59:32,909 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:59:33,145 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:59:33,185 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:59:33,185 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 16:59:33,188 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:59:33 BoogieIcfgContainer [2023-12-02 16:59:33,188 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:59:33,191 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:59:33,191 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:59:33,195 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:59:33,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:59:32" (1/3) ... [2023-12-02 16:59:33,196 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25592be9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:59:33, skipping insertion in model container [2023-12-02 16:59:33,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:32" (2/3) ... [2023-12-02 16:59:33,197 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25592be9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:59:33, skipping insertion in model container [2023-12-02 16:59:33,197 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:59:33" (3/3) ... [2023-12-02 16:59:33,199 INFO L112 eAbstractionObserver]: Analyzing ICFG mannadiv_valuebound1.c [2023-12-02 16:59:33,219 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:59:33,220 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2023-12-02 16:59:33,293 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:59:33,301 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;@24d00d52, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:59:33,301 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-12-02 16:59:33,306 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 16:59:33,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 16:59:33,314 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:33,315 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:59:33,315 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 16:59:33,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:33,321 INFO L85 PathProgramCache]: Analyzing trace with hash 885391590, now seen corresponding path program 1 times [2023-12-02 16:59:33,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:33,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602794404] [2023-12-02 16:59:33,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:33,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:33,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:33,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602794404] [2023-12-02 16:59:33,477 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-02 16:59:33,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442995820] [2023-12-02 16:59:33,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:33,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:33,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:59:33,483 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:59:33,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 16:59:33,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:33,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 16:59:33,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:59:33,597 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 16:59:33,598 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:59:33,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442995820] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:59:33,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:59:33,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:59:33,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008658669] [2023-12-02 16:59:33,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:59:33,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 16:59:33,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:33,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 16:59:33,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 16:59:33,645 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 16:59:33,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:33,680 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2023-12-02 16:59:33,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 16:59:33,683 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 16:59:33,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:33,691 INFO L225 Difference]: With dead ends: 68 [2023-12-02 16:59:33,691 INFO L226 Difference]: Without dead ends: 52 [2023-12-02 16:59:33,695 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 16:59:33,699 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 16:59:33,700 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 16:59:33,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-12-02 16:59:33,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-12-02 16:59:33,742 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 16:59:33,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2023-12-02 16:59:33,746 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 10 [2023-12-02 16:59:33,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:33,748 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2023-12-02 16:59:33,748 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 16:59:33,748 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2023-12-02 16:59:33,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 16:59:33,750 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:33,750 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:59:33,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 16:59:33,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:33,954 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 16:59:33,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:33,955 INFO L85 PathProgramCache]: Analyzing trace with hash 885388443, now seen corresponding path program 1 times [2023-12-02 16:59:33,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:33,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759380068] [2023-12-02 16:59:33,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:33,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:33,973 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:59:33,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574639766] [2023-12-02 16:59:33,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:33,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:33,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:59:33,975 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:59:33,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 16:59:34,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:34,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 16:59:34,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:59:34,172 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 16:59:34,172 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:59:34,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:34,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759380068] [2023-12-02 16:59:34,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:59:34,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574639766] [2023-12-02 16:59:34,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574639766] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:59:34,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:59:34,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:59:34,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492836665] [2023-12-02 16:59:34,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:59:34,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:59:34,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:34,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:59:34,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:59:34,178 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 16:59:34,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:34,327 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2023-12-02 16:59:34,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:59:34,328 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 16:59:34,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:34,330 INFO L225 Difference]: With dead ends: 92 [2023-12-02 16:59:34,330 INFO L226 Difference]: Without dead ends: 86 [2023-12-02 16:59:34,330 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 16:59:34,332 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 16:59:34,333 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 16:59:34,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-12-02 16:59:34,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 72. [2023-12-02 16:59:34,344 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 16:59:34,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2023-12-02 16:59:34,346 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 10 [2023-12-02 16:59:34,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:34,346 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2023-12-02 16:59:34,347 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 16:59:34,347 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2023-12-02 16:59:34,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 16:59:34,347 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:34,348 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:59:34,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 16:59:34,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:34,553 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 16:59:34,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:34,554 INFO L85 PathProgramCache]: Analyzing trace with hash 454770653, now seen corresponding path program 1 times [2023-12-02 16:59:34,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:34,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561805755] [2023-12-02 16:59:34,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:34,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:34,568 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:59:34,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [822218830] [2023-12-02 16:59:34,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:34,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:34,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:59:34,571 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:59:34,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 16:59:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:34,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:59:34,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:59:34,660 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 16:59:34,660 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:59:34,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:34,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561805755] [2023-12-02 16:59:34,661 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:59:34,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822218830] [2023-12-02 16:59:34,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822218830] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:59:34,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:59:34,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:59:34,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418362992] [2023-12-02 16:59:34,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:59:34,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:59:34,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:34,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:59:34,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:59:34,664 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 16:59:34,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:34,726 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2023-12-02 16:59:34,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:59:34,727 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 16:59:34,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:34,728 INFO L225 Difference]: With dead ends: 75 [2023-12-02 16:59:34,729 INFO L226 Difference]: Without dead ends: 69 [2023-12-02 16:59:34,729 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 16:59:34,730 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 16:59:34,731 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 16:59:34,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-02 16:59:34,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-12-02 16:59:34,743 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 16:59:34,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2023-12-02 16:59:34,745 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 12 [2023-12-02 16:59:34,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:34,746 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2023-12-02 16:59:34,746 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 16:59:34,746 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2023-12-02 16:59:34,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 16:59:34,747 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:34,747 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:59:34,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 16:59:34,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:34,950 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 16:59:34,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:34,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1212988407, now seen corresponding path program 1 times [2023-12-02 16:59:34,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:34,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227782972] [2023-12-02 16:59:34,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:34,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:34,961 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:59:34,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1005467639] [2023-12-02 16:59:34,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:34,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:34,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:59:34,963 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:59:34,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 16:59:35,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:35,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:59:35,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:59:35,049 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 16:59:35,050 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:59:35,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:35,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227782972] [2023-12-02 16:59:35,050 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:59:35,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005467639] [2023-12-02 16:59:35,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005467639] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:59:35,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:59:35,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:59:35,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062562932] [2023-12-02 16:59:35,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:59:35,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:59:35,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:35,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:59:35,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:59:35,053 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 16:59:35,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:35,157 INFO L93 Difference]: Finished difference Result 115 states and 137 transitions. [2023-12-02 16:59:35,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:59:35,157 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 16:59:35,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:35,160 INFO L225 Difference]: With dead ends: 115 [2023-12-02 16:59:35,160 INFO L226 Difference]: Without dead ends: 104 [2023-12-02 16:59:35,160 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 16:59:35,161 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 16:59:35,162 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 16:59:35,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-12-02 16:59:35,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2023-12-02 16:59:35,179 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 16:59:35,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 116 transitions. [2023-12-02 16:59:35,181 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 116 transitions. Word has length 13 [2023-12-02 16:59:35,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:35,182 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 116 transitions. [2023-12-02 16:59:35,182 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 16:59:35,182 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 116 transitions. [2023-12-02 16:59:35,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 16:59:35,183 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:35,183 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:59:35,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 16:59:35,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:35,384 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 16:59:35,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:35,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1052064993, now seen corresponding path program 1 times [2023-12-02 16:59:35,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:35,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969550263] [2023-12-02 16:59:35,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:35,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:35,395 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:59:35,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131166137] [2023-12-02 16:59:35,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:35,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:35,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:59:35,397 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:59:35,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 16:59:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:35,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 16:59:35,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:59:35,530 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 16:59:35,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:59:35,720 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 16:59:35,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:35,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969550263] [2023-12-02 16:59:35,721 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:59:35,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131166137] [2023-12-02 16:59:35,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131166137] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:59:35,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [860049886] [2023-12-02 16:59:35,744 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 16:59:35,744 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:59:35,748 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:59:35,752 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:59:35,753 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:59:36,093 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 16:59:36,142 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:59:36,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [860049886] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:59:36,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 16:59:36,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 13 [2023-12-02 16:59:36,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678605637] [2023-12-02 16:59:36,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:59:36,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:59:36,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:36,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:59:36,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-12-02 16:59:36,825 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 16:59:37,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:37,107 INFO L93 Difference]: Finished difference Result 99 states and 118 transitions. [2023-12-02 16:59:37,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 16:59:37,108 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 16:59:37,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:37,109 INFO L225 Difference]: With dead ends: 99 [2023-12-02 16:59:37,109 INFO L226 Difference]: Without dead ends: 97 [2023-12-02 16:59:37,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-12-02 16:59:37,111 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, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:59:37,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 33 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:59:37,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-12-02 16:59:37,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2023-12-02 16:59:37,129 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 16:59:37,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2023-12-02 16:59:37,130 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 14 [2023-12-02 16:59:37,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:37,131 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2023-12-02 16:59:37,131 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 16:59:37,131 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2023-12-02 16:59:37,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 16:59:37,132 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:37,132 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 16:59:37,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 16:59:37,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:37,338 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 16:59:37,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:37,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1837019302, now seen corresponding path program 1 times [2023-12-02 16:59:37,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:37,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380024553] [2023-12-02 16:59:37,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:37,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:37,352 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:59:37,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940782084] [2023-12-02 16:59:37,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:37,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:37,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:59:37,354 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:59:37,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 16:59:37,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:37,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:59:37,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:59:37,447 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 16:59:37,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:59:37,510 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 16:59:37,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:37,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380024553] [2023-12-02 16:59:37,510 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:59:37,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940782084] [2023-12-02 16:59:37,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940782084] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:59:37,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [49421674] [2023-12-02 16:59:37,513 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 16:59:37,514 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:59:37,514 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:59:37,514 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:59:37,514 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:59:37,878 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-12-02 16:59:37,885 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 16:59:37,919 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:59:38,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [49421674] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:59:38,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 16:59:38,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [4, 4] total 17 [2023-12-02 16:59:38,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843223347] [2023-12-02 16:59:38,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:59:38,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 16:59:38,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:38,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 16:59:38,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-12-02 16:59:38,971 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 16:59:39,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:39,337 INFO L93 Difference]: Finished difference Result 103 states and 121 transitions. [2023-12-02 16:59:39,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 16:59:39,338 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 16:59:39,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:39,339 INFO L225 Difference]: With dead ends: 103 [2023-12-02 16:59:39,339 INFO L226 Difference]: Without dead ends: 101 [2023-12-02 16:59:39,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-12-02 16:59:39,341 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 16:59:39,341 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 16:59:39,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-12-02 16:59:39,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2023-12-02 16:59:39,356 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 16:59:39,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2023-12-02 16:59:39,357 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 25 [2023-12-02 16:59:39,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:39,358 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2023-12-02 16:59:39,358 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 16:59:39,358 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2023-12-02 16:59:39,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 16:59:39,359 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:39,359 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 16:59:39,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-02 16:59:39,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 16:59:39,565 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 16:59:39,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:39,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1836711462, now seen corresponding path program 1 times [2023-12-02 16:59:39,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:39,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70496245] [2023-12-02 16:59:39,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:39,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:39,587 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:59:39,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1160295109] [2023-12-02 16:59:39,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:39,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:39,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:59:39,589 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:59:39,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 16:59:39,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:39,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:59:39,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:59:39,674 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 16:59:39,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:59:39,739 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 16:59:39,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:39,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70496245] [2023-12-02 16:59:39,740 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:59:39,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160295109] [2023-12-02 16:59:39,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160295109] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:59:39,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [845174301] [2023-12-02 16:59:39,743 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 16:59:39,743 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:59:39,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:59:39,744 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:59:39,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:59:40,039 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-12-02 16:59:40,047 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 16:59:40,087 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:59:40,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [845174301] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:59:40,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 16:59:40,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [4, 4] total 17 [2023-12-02 16:59:40,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531619354] [2023-12-02 16:59:40,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:59:40,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 16:59:40,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:40,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 16:59:40,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-12-02 16:59:40,990 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 16:59:41,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:41,369 INFO L93 Difference]: Finished difference Result 105 states and 123 transitions. [2023-12-02 16:59:41,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 16:59:41,369 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 16:59:41,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:41,370 INFO L225 Difference]: With dead ends: 105 [2023-12-02 16:59:41,370 INFO L226 Difference]: Without dead ends: 103 [2023-12-02 16:59:41,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-12-02 16:59:41,372 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 16:59:41,372 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 16:59:41,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-12-02 16:59:41,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-12-02 16:59:41,387 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 16:59:41,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2023-12-02 16:59:41,388 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 25 [2023-12-02 16:59:41,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:41,388 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2023-12-02 16:59:41,389 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 16:59:41,389 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2023-12-02 16:59:41,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 16:59:41,390 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:41,390 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 16:59:41,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 16:59:41,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 16:59:41,591 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 16:59:41,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:41,591 INFO L85 PathProgramCache]: Analyzing trace with hash -412111191, now seen corresponding path program 1 times [2023-12-02 16:59:41,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:41,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74651961] [2023-12-02 16:59:41,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:41,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:41,601 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:59:41,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451989837] [2023-12-02 16:59:41,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:41,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:41,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:59:41,602 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:59:41,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 16:59:41,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:41,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 16:59:41,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:59:41,785 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 16:59:41,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:59:41,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:41,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74651961] [2023-12-02 16:59:41,938 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:59:41,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451989837] [2023-12-02 16:59:41,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451989837] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:59:41,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [473603147] [2023-12-02 16:59:41,941 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 16:59:41,941 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:59:41,942 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:59:41,942 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:59:41,942 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:59:42,970 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 16:59:42,986 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 16:59:43,014 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:59:44,229 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 16:59:44,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:59:44,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:59:44,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2023-12-02 16:59:44,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859456309] [2023-12-02 16:59:44,230 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 16:59:44,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:59:44,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:44,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:59:44,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2023-12-02 16:59:44,231 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 16:59:44,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:44,338 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2023-12-02 16:59:44,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:59:44,338 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 16:59:44,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:44,340 INFO L225 Difference]: With dead ends: 113 [2023-12-02 16:59:44,340 INFO L226 Difference]: Without dead ends: 111 [2023-12-02 16:59:44,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2023-12-02 16:59:44,342 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 16:59:44,342 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 16:59:44,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-12-02 16:59:44,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 101. [2023-12-02 16:59:44,353 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 16:59:44,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2023-12-02 16:59:44,354 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 28 [2023-12-02 16:59:44,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:44,354 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2023-12-02 16:59:44,355 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 16:59:44,355 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2023-12-02 16:59:44,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 16:59:44,356 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:44,356 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 16:59:44,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 16:59:44,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 16:59:44,557 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 16:59:44,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:44,557 INFO L85 PathProgramCache]: Analyzing trace with hash 109455015, now seen corresponding path program 1 times [2023-12-02 16:59:44,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:44,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804227181] [2023-12-02 16:59:44,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:44,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:44,566 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:59:44,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [898579501] [2023-12-02 16:59:44,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:44,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:44,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:59:44,567 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:59:44,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 16:59:44,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:44,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 16:59:44,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:59:44,704 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 16:59:44,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:59:44,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:44,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804227181] [2023-12-02 16:59:44,834 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:59:44,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898579501] [2023-12-02 16:59:44,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898579501] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:59:44,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1532253596] [2023-12-02 16:59:44,837 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 16:59:44,837 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:59:44,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:59:44,838 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:59:44,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:59:45,792 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 16:59:45,806 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 16:59:45,836 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:59:48,150 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 16:59:48,150 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:59:48,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:59:48,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2023-12-02 16:59:48,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030382335] [2023-12-02 16:59:48,151 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 16:59:48,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:59:48,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:48,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:59:48,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2023-12-02 16:59:48,152 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 16:59:48,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:48,272 INFO L93 Difference]: Finished difference Result 162 states and 179 transitions. [2023-12-02 16:59:48,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:59:48,272 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 16:59:48,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:48,273 INFO L225 Difference]: With dead ends: 162 [2023-12-02 16:59:48,274 INFO L226 Difference]: Without dead ends: 159 [2023-12-02 16:59:48,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2023-12-02 16:59:48,275 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 16:59:48,275 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 16:59:48,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-12-02 16:59:48,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 135. [2023-12-02 16:59:48,285 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 16:59:48,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 169 transitions. [2023-12-02 16:59:48,286 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 169 transitions. Word has length 29 [2023-12-02 16:59:48,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:48,286 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 169 transitions. [2023-12-02 16:59:48,286 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 16:59:48,287 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 169 transitions. [2023-12-02 16:59:48,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 16:59:48,287 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:48,287 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 16:59:48,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 16:59:48,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-12-02 16:59:48,488 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 16:59:48,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:48,489 INFO L85 PathProgramCache]: Analyzing trace with hash 66873311, now seen corresponding path program 1 times [2023-12-02 16:59:48,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:48,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028350939] [2023-12-02 16:59:48,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:48,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:48,496 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:59:48,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996336290] [2023-12-02 16:59:48,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:48,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:48,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:59:48,497 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:59:48,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 16:59:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:48,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 16:59:48,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:59:48,622 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 16:59:48,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:59:48,709 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 16:59:48,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:48,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028350939] [2023-12-02 16:59:48,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:59:48,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996336290] [2023-12-02 16:59:48,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996336290] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:59:48,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [949366879] [2023-12-02 16:59:48,712 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 16:59:48,712 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:59:48,713 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:59:48,713 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:59:48,713 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:59:49,560 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 16:59:49,566 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 16:59:49,587 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:59:50,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [949366879] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:59:50,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 16:59:50,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [7, 7] total 24 [2023-12-02 16:59:50,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804193472] [2023-12-02 16:59:50,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:59:50,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 16:59:50,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:50,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 16:59:50,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2023-12-02 16:59:50,676 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 16:59:52,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:52,246 INFO L93 Difference]: Finished difference Result 147 states and 173 transitions. [2023-12-02 16:59:52,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 16:59:52,246 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 16:59:52,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:52,248 INFO L225 Difference]: With dead ends: 147 [2023-12-02 16:59:52,248 INFO L226 Difference]: Without dead ends: 137 [2023-12-02 16:59:52,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=244, Invalid=878, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 16:59:52,249 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, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 16:59:52,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 64 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 16:59:52,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-12-02 16:59:52,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 131. [2023-12-02 16:59:52,258 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 16:59:52,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 159 transitions. [2023-12-02 16:59:52,259 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 159 transitions. Word has length 31 [2023-12-02 16:59:52,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:52,259 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 159 transitions. [2023-12-02 16:59:52,260 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 16:59:52,260 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 159 transitions. [2023-12-02 16:59:52,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 16:59:52,260 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:52,260 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 16:59:52,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-02 16:59:52,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:52,461 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 16:59:52,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:52,462 INFO L85 PathProgramCache]: Analyzing trace with hash 894223917, now seen corresponding path program 1 times [2023-12-02 16:59:52,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:52,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063625041] [2023-12-02 16:59:52,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:52,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:52,469 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:59:52,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300981979] [2023-12-02 16:59:52,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:52,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:52,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:59:52,471 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:59:52,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 16:59:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:52,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 16:59:52,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:59:52,630 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 16:59:52,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:59:52,793 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 16:59:52,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:52,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063625041] [2023-12-02 16:59:52,794 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:59:52,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300981979] [2023-12-02 16:59:52,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300981979] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:59:52,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1152097006] [2023-12-02 16:59:52,796 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 16:59:52,797 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:59:52,797 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:59:52,797 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:59:52,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:59:53,616 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 16:59:53,628 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 16:59:53,654 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:59:55,273 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 16:59:55,274 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:59:55,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 16:59:55,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-12-02 16:59:55,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74986406] [2023-12-02 16:59:55,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 16:59:55,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 16:59:55,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:55,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 16:59:55,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2023-12-02 16:59:55,276 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 16:59:55,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:55,487 INFO L93 Difference]: Finished difference Result 131 states and 159 transitions. [2023-12-02 16:59:55,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 16:59:55,487 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 16:59:55,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:55,488 INFO L225 Difference]: With dead ends: 131 [2023-12-02 16:59:55,488 INFO L226 Difference]: Without dead ends: 128 [2023-12-02 16:59:55,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=176, Invalid=1014, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 16:59:55,490 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 16:59:55,490 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 16:59:55,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-12-02 16:59:55,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2023-12-02 16:59:55,499 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 16:59:55,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 151 transitions. [2023-12-02 16:59:55,500 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 151 transitions. Word has length 32 [2023-12-02 16:59:55,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:55,500 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 151 transitions. [2023-12-02 16:59:55,500 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 16:59:55,500 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 151 transitions. [2023-12-02 16:59:55,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 16:59:55,501 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:55,501 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 16:59:55,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 16:59:55,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:55,702 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 16:59:55,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:55,703 INFO L85 PathProgramCache]: Analyzing trace with hash -159255839, now seen corresponding path program 1 times [2023-12-02 16:59:55,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:55,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853741358] [2023-12-02 16:59:55,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:55,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:55,709 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:59:55,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1077836330] [2023-12-02 16:59:55,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:55,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:55,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:59:55,711 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:59:55,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 16:59:55,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:55,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:59:55,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:59:55,796 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 16:59:55,796 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:59:55,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:55,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853741358] [2023-12-02 16:59:55,796 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:59:55,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077836330] [2023-12-02 16:59:55,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077836330] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:59:55,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:59:55,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:59:55,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682314249] [2023-12-02 16:59:55,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:59:55,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:59:55,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:55,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:59:55,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:59:55,798 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 16:59:55,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:55,951 INFO L93 Difference]: Finished difference Result 130 states and 151 transitions. [2023-12-02 16:59:55,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:59:55,952 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 16:59:55,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:55,953 INFO L225 Difference]: With dead ends: 130 [2023-12-02 16:59:55,953 INFO L226 Difference]: Without dead ends: 129 [2023-12-02 16:59:55,954 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 16:59:55,954 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 16:59:55,955 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 16:59:55,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-12-02 16:59:55,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2023-12-02 16:59:55,965 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 16:59:55,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 148 transitions. [2023-12-02 16:59:55,966 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 148 transitions. Word has length 33 [2023-12-02 16:59:55,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:55,966 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 148 transitions. [2023-12-02 16:59:55,966 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 16:59:55,966 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 148 transitions. [2023-12-02 16:59:55,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 16:59:55,967 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:55,967 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 16:59:55,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 16:59:56,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 16:59:56,168 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 16:59:56,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:56,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1951137707, now seen corresponding path program 1 times [2023-12-02 16:59:56,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:56,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939406228] [2023-12-02 16:59:56,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:56,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:56,176 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:59:56,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135481456] [2023-12-02 16:59:56,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:56,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:56,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:59:56,177 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:59:56,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 16:59:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:56,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 16:59:56,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:59:56,354 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 16:59:56,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:59:56,435 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 16:59:56,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:56,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939406228] [2023-12-02 16:59:56,435 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:59:56,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135481456] [2023-12-02 16:59:56,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135481456] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:59:56,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2113948152] [2023-12-02 16:59:56,438 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 16:59:56,438 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:59:56,438 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:59:56,438 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:59:56,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:59:57,221 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 16:59:57,239 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 16:59:57,261 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:59:59,050 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 16:59:59,051 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:59:59,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 16:59:59,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-12-02 16:59:59,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197972377] [2023-12-02 16:59:59,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 16:59:59,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 16:59:59,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:59,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 16:59:59,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2023-12-02 16:59:59,053 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 16:59:59,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:59,483 INFO L93 Difference]: Finished difference Result 171 states and 196 transitions. [2023-12-02 16:59:59,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 16:59:59,484 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 16:59:59,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:59,485 INFO L225 Difference]: With dead ends: 171 [2023-12-02 16:59:59,486 INFO L226 Difference]: Without dead ends: 170 [2023-12-02 16:59:59,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 16:59:59,487 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 169 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 16:59:59,487 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 16:59:59,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-12-02 16:59:59,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 127. [2023-12-02 16:59:59,498 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 16:59:59,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 146 transitions. [2023-12-02 16:59:59,499 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 146 transitions. Word has length 33 [2023-12-02 16:59:59,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:59,499 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 146 transitions. [2023-12-02 16:59:59,499 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 16:59:59,499 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 146 transitions. [2023-12-02 16:59:59,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 16:59:59,500 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:59,500 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 16:59:59,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 16:59:59,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 16:59:59,701 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 16:59:59,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:59,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1479578058, now seen corresponding path program 1 times [2023-12-02 16:59:59,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:59,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547284513] [2023-12-02 16:59:59,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:59,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:59,708 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:59:59,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [273622897] [2023-12-02 16:59:59,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:59,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:59,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:59:59,710 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:59:59,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 16:59:59,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:59,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:59:59,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:59:59,780 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 16:59:59,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:59:59,817 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 16:59:59,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:59,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547284513] [2023-12-02 16:59:59,817 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:59:59,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273622897] [2023-12-02 16:59:59,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273622897] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:59:59,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1702276338] [2023-12-02 16:59:59,820 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 16:59:59,820 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:59:59,820 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:59:59,821 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:59:59,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:00:00,581 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 17:00:00,588 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:00:00,610 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:00:01,536 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 17:00:01,536 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:00:01,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:00:01,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-12-02 17:00:01,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510923470] [2023-12-02 17:00:01,536 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:00:01,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:00:01,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:00:01,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:00:01,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2023-12-02 17:00:01,538 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 17:00:01,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:01,633 INFO L93 Difference]: Finished difference Result 318 states and 372 transitions. [2023-12-02 17:00:01,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:00:01,634 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 17:00:01,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:01,635 INFO L225 Difference]: With dead ends: 318 [2023-12-02 17:00:01,635 INFO L226 Difference]: Without dead ends: 316 [2023-12-02 17:00:01,636 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 17:00:01,637 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 70 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 17:00:01,637 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 17:00:01,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-12-02 17:00:01,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 263. [2023-12-02 17:00:01,666 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 17:00:01,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 317 transitions. [2023-12-02 17:00:01,668 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 317 transitions. Word has length 39 [2023-12-02 17:00:01,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:01,668 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 317 transitions. [2023-12-02 17:00:01,668 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 17:00:01,668 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 317 transitions. [2023-12-02 17:00:01,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 17:00:01,669 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:01,669 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 17:00:01,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 17:00:01,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 17:00:01,870 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 17:00:01,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:01,870 INFO L85 PathProgramCache]: Analyzing trace with hash 287486975, now seen corresponding path program 1 times [2023-12-02 17:00:01,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:00:01,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364737945] [2023-12-02 17:00:01,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:01,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:00:01,880 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:00:01,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [109912947] [2023-12-02 17:00:01,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:01,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:01,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:01,881 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:01,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 17:00:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:01,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:00:01,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:01,957 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 17:00:01,957 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:00:01,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:00:01,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364737945] [2023-12-02 17:00:01,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:00:01,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109912947] [2023-12-02 17:00:01,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109912947] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:00:01,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:00:01,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 17:00:01,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212995952] [2023-12-02 17:00:01,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:00:01,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:00:01,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:00:01,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:00:01,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:00:01,959 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 17:00:01,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:01,999 INFO L93 Difference]: Finished difference Result 263 states and 317 transitions. [2023-12-02 17:00:01,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:00:02,000 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 17:00:02,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:02,001 INFO L225 Difference]: With dead ends: 263 [2023-12-02 17:00:02,001 INFO L226 Difference]: Without dead ends: 261 [2023-12-02 17:00:02,002 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 17:00:02,002 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 17:00:02,003 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 17:00:02,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-12-02 17:00:02,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 257. [2023-12-02 17:00:02,023 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 17:00:02,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 303 transitions. [2023-12-02 17:00:02,025 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 303 transitions. Word has length 44 [2023-12-02 17:00:02,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:02,025 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 303 transitions. [2023-12-02 17:00:02,026 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 17:00:02,026 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 303 transitions. [2023-12-02 17:00:02,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 17:00:02,026 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:02,027 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 17:00:02,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-02 17:00:02,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 17:00:02,227 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 17:00:02,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:02,228 INFO L85 PathProgramCache]: Analyzing trace with hash -640162343, now seen corresponding path program 2 times [2023-12-02 17:00:02,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:00:02,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896753413] [2023-12-02 17:00:02,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:02,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:00:02,237 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:00:02,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586676720] [2023-12-02 17:00:02,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:00:02,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:02,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:02,239 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:02,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 17:00:02,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 17:00:02,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:00:02,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:00:02,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:02,623 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 17:00:02,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:02,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:00:02,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896753413] [2023-12-02 17:00:02,741 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:00:02,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586676720] [2023-12-02 17:00:02,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586676720] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:00:02,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1370597617] [2023-12-02 17:00:02,744 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:00:02,744 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:00:02,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:00:02,744 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:00:02,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:00:03,533 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 17:00:03,543 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:00:03,576 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:00:05,865 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 17:00:05,866 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:00:05,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:00:05,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2023-12-02 17:00:05,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390796981] [2023-12-02 17:00:05,866 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:00:05,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:00:05,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:00:05,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:00:05,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2023-12-02 17:00:05,868 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 17:00:06,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:06,049 INFO L93 Difference]: Finished difference Result 520 states and 623 transitions. [2023-12-02 17:00:06,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:00:06,050 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 17:00:06,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:06,053 INFO L225 Difference]: With dead ends: 520 [2023-12-02 17:00:06,053 INFO L226 Difference]: Without dead ends: 362 [2023-12-02 17:00:06,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2023-12-02 17:00:06,055 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 17:00:06,055 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 17:00:06,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2023-12-02 17:00:06,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 289. [2023-12-02 17:00:06,078 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 17:00:06,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 338 transitions. [2023-12-02 17:00:06,079 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 338 transitions. Word has length 47 [2023-12-02 17:00:06,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:06,080 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 338 transitions. [2023-12-02 17:00:06,080 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 17:00:06,080 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 338 transitions. [2023-12-02 17:00:06,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-02 17:00:06,081 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:06,081 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 17:00:06,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-02 17:00:06,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 17:00:06,281 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 17:00:06,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:06,282 INFO L85 PathProgramCache]: Analyzing trace with hash 622787723, now seen corresponding path program 3 times [2023-12-02 17:00:06,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:00:06,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094938844] [2023-12-02 17:00:06,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:06,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:00:06,290 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:00:06,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1804569238] [2023-12-02 17:00:06,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:00:06,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:06,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:06,291 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:06,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 17:00:06,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:00:06,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:00:06,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:00:06,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:06,405 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 17:00:06,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:06,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:00:06,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094938844] [2023-12-02 17:00:06,803 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:00:06,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804569238] [2023-12-02 17:00:06,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804569238] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:00:06,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [481272553] [2023-12-02 17:00:06,805 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:00:06,805 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:00:06,806 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:00:06,806 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:00:06,806 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:00:07,482 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 17:00:07,492 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:00:07,513 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:00:09,678 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 17:00:09,679 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:00:09,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:00:09,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2023-12-02 17:00:09,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683734336] [2023-12-02 17:00:09,679 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:00:09,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:00:09,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:00:09,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:00:09,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2023-12-02 17:00:09,680 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 17:00:09,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:09,776 INFO L93 Difference]: Finished difference Result 472 states and 557 transitions. [2023-12-02 17:00:09,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:00:09,776 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 17:00:09,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:09,778 INFO L225 Difference]: With dead ends: 472 [2023-12-02 17:00:09,778 INFO L226 Difference]: Without dead ends: 314 [2023-12-02 17:00:09,779 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 17:00:09,779 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 17:00:09,780 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 17:00:09,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2023-12-02 17:00:09,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 307. [2023-12-02 17:00:09,814 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 17:00:09,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 357 transitions. [2023-12-02 17:00:09,816 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 357 transitions. Word has length 65 [2023-12-02 17:00:09,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:09,817 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 357 transitions. [2023-12-02 17:00:09,817 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 17:00:09,817 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 357 transitions. [2023-12-02 17:00:09,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-02 17:00:09,818 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:09,818 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 17:00:09,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 17:00:10,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 17:00:10,019 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 17:00:10,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:10,019 INFO L85 PathProgramCache]: Analyzing trace with hash 73988729, now seen corresponding path program 1 times [2023-12-02 17:00:10,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:00:10,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576484725] [2023-12-02 17:00:10,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:10,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:00:10,027 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:00:10,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546914896] [2023-12-02 17:00:10,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:10,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:10,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:10,028 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:10,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 17:00:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:10,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 17:00:10,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:10,182 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 17:00:10,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:10,346 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 17:00:10,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:00:10,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576484725] [2023-12-02 17:00:10,347 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:00:10,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546914896] [2023-12-02 17:00:10,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546914896] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:10,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1807296315] [2023-12-02 17:00:10,349 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:00:10,349 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:00:10,350 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:00:10,350 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:00:10,350 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:00:11,300 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:00:11,314 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:00:11,338 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:00:13,504 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 17:00:13,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:00:13,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:00:13,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-12-02 17:00:13,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038261864] [2023-12-02 17:00:13,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:00:13,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 17:00:13,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:00:13,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 17:00:13,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 17:00:13,506 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 17:00:14,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:14,157 INFO L93 Difference]: Finished difference Result 772 states and 881 transitions. [2023-12-02 17:00:14,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-02 17:00:14,158 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 17:00:14,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:14,162 INFO L225 Difference]: With dead ends: 772 [2023-12-02 17:00:14,162 INFO L226 Difference]: Without dead ends: 754 [2023-12-02 17:00:14,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 161 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=356, Invalid=2194, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 17:00:14,164 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 183 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 17:00:14,164 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 17:00:14,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2023-12-02 17:00:14,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 581. [2023-12-02 17:00:14,214 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 17:00:14,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 663 transitions. [2023-12-02 17:00:14,218 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 663 transitions. Word has length 67 [2023-12-02 17:00:14,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:14,219 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 663 transitions. [2023-12-02 17:00:14,219 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 17:00:14,219 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 663 transitions. [2023-12-02 17:00:14,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-02 17:00:14,221 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:14,221 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 17:00:14,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 17:00:14,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:14,423 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 17:00:14,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:14,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1602109679, now seen corresponding path program 1 times [2023-12-02 17:00:14,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:00:14,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670260624] [2023-12-02 17:00:14,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:14,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:00:14,433 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:00:14,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648209002] [2023-12-02 17:00:14,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:14,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:14,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:14,435 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:14,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 17:00:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:14,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 17:00:14,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:14,580 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 17:00:14,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:14,683 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 17:00:14,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:00:14,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670260624] [2023-12-02 17:00:14,684 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:00:14,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648209002] [2023-12-02 17:00:14,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648209002] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:14,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [659788022] [2023-12-02 17:00:14,686 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:00:14,686 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:00:14,686 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:00:14,687 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:00:14,687 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:00:15,419 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 17:00:15,429 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:00:15,451 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:00:17,173 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 17:00:17,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:00:17,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:00:17,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-12-02 17:00:17,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849655779] [2023-12-02 17:00:17,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:00:17,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 17:00:17,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:00:17,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 17:00:17,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2023-12-02 17:00:17,175 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 17:00:17,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:17,773 INFO L93 Difference]: Finished difference Result 1177 states and 1386 transitions. [2023-12-02 17:00:17,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 17:00:17,774 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 17:00:17,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:17,781 INFO L225 Difference]: With dead ends: 1177 [2023-12-02 17:00:17,781 INFO L226 Difference]: Without dead ends: 1176 [2023-12-02 17:00:17,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2023-12-02 17:00:17,783 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 131 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:00:17,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 149 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 17:00:17,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2023-12-02 17:00:17,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1135. [2023-12-02 17:00:17,888 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 17:00:17,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1360 transitions. [2023-12-02 17:00:17,893 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1360 transitions. Word has length 78 [2023-12-02 17:00:17,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:17,893 INFO L495 AbstractCegarLoop]: Abstraction has 1135 states and 1360 transitions. [2023-12-02 17:00:17,893 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 17:00:17,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1360 transitions. [2023-12-02 17:00:17,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-02 17:00:17,895 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:17,895 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 17:00:17,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-02 17:00:18,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:18,095 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 17:00:18,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:18,096 INFO L85 PathProgramCache]: Analyzing trace with hash 615063849, now seen corresponding path program 1 times [2023-12-02 17:00:18,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:00:18,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963960642] [2023-12-02 17:00:18,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:18,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:00:18,105 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:00:18,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787160666] [2023-12-02 17:00:18,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:18,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:18,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:18,107 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:18,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 17:00:18,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:18,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 17:00:18,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:18,350 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 17:00:18,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:18,548 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 17:00:18,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:00:18,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963960642] [2023-12-02 17:00:18,548 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:00:18,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787160666] [2023-12-02 17:00:18,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787160666] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:18,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [340152384] [2023-12-02 17:00:18,550 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:00:18,550 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:00:18,550 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:00:18,550 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:00:18,551 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:00:19,661 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:00:19,673 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:00:19,693 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:00:22,182 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 17:00:22,182 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:00:22,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:00:22,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-12-02 17:00:22,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787787211] [2023-12-02 17:00:22,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:00:22,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 17:00:22,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:00:22,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 17:00:22,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 17:00:22,185 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 17:00:23,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:23,429 INFO L93 Difference]: Finished difference Result 1571 states and 1876 transitions. [2023-12-02 17:00:23,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 17:00:23,430 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 17:00:23,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:23,437 INFO L225 Difference]: With dead ends: 1571 [2023-12-02 17:00:23,437 INFO L226 Difference]: Without dead ends: 1556 [2023-12-02 17:00:23,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 210 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=285, Invalid=1971, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 17:00:23,439 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, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:00:23,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 262 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:00:23,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2023-12-02 17:00:23,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1437. [2023-12-02 17:00:23,562 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 17:00:23,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 1654 transitions. [2023-12-02 17:00:23,568 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 1654 transitions. Word has length 83 [2023-12-02 17:00:23,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:23,568 INFO L495 AbstractCegarLoop]: Abstraction has 1437 states and 1654 transitions. [2023-12-02 17:00:23,568 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 17:00:23,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 1654 transitions. [2023-12-02 17:00:23,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-02 17:00:23,570 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:23,570 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 17:00:23,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-02 17:00:23,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:23,770 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 17:00:23,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:23,771 INFO L85 PathProgramCache]: Analyzing trace with hash 241787266, now seen corresponding path program 2 times [2023-12-02 17:00:23,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:00:23,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516723352] [2023-12-02 17:00:23,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:23,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:00:23,782 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:00:23,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1599590451] [2023-12-02 17:00:23,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:00:23,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:23,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:23,784 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:23,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 17:00:23,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 17:00:23,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:00:23,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 17:00:23,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:23,953 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 17:00:23,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:24,082 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 17:00:24,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:00:24,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516723352] [2023-12-02 17:00:24,082 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:00:24,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599590451] [2023-12-02 17:00:24,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599590451] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:24,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1395323002] [2023-12-02 17:00:24,084 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:00:24,084 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:00:24,084 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:00:24,085 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:00:24,085 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:00:24,844 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 17:00:24,850 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:00:24,871 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:00:25,833 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 17:00:25,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:00:25,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:00:25,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-12-02 17:00:25,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641611905] [2023-12-02 17:00:25,833 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:00:25,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 17:00:25,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:00:25,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 17:00:25,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2023-12-02 17:00:25,835 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 17:00:26,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:26,184 INFO L93 Difference]: Finished difference Result 2987 states and 3517 transitions. [2023-12-02 17:00:26,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 17:00:26,185 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 17:00:26,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:26,196 INFO L225 Difference]: With dead ends: 2987 [2023-12-02 17:00:26,196 INFO L226 Difference]: Without dead ends: 2986 [2023-12-02 17:00:26,197 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 17:00:26,198 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 17:00:26,199 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 17:00:26,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2986 states. [2023-12-02 17:00:26,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2986 to 2754. [2023-12-02 17:00:26,402 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 17:00:26,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2754 states to 2754 states and 3211 transitions. [2023-12-02 17:00:26,410 INFO L78 Accepts]: Start accepts. Automaton has 2754 states and 3211 transitions. Word has length 93 [2023-12-02 17:00:26,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:26,410 INFO L495 AbstractCegarLoop]: Abstraction has 2754 states and 3211 transitions. [2023-12-02 17:00:26,410 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 17:00:26,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2754 states and 3211 transitions. [2023-12-02 17:00:26,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 17:00:26,413 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:26,413 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 17:00:26,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-02 17:00:26,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:26,614 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 17:00:26,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:26,614 INFO L85 PathProgramCache]: Analyzing trace with hash -2018296607, now seen corresponding path program 2 times [2023-12-02 17:00:26,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:00:26,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617144966] [2023-12-02 17:00:26,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:26,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:00:26,625 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:00:26,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849512333] [2023-12-02 17:00:26,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:00:26,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:26,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:26,627 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:26,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 17:00:26,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 17:00:26,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:00:26,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 17:00:26,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:26,888 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 17:00:26,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:26,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:00:26,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617144966] [2023-12-02 17:00:26,996 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:00:26,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849512333] [2023-12-02 17:00:26,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849512333] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:00:26,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1738505130] [2023-12-02 17:00:26,998 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:00:26,999 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:00:26,999 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:00:26,999 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:00:26,999 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:00:28,010 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:00:28,022 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:00:28,043 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:00:30,474 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 17:00:30,474 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:00:30,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:00:30,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-12-02 17:00:30,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200949618] [2023-12-02 17:00:30,475 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:00:30,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 17:00:30,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:00:30,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 17:00:30,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 17:00:30,476 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 17:00:30,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:30,843 INFO L93 Difference]: Finished difference Result 4250 states and 4961 transitions. [2023-12-02 17:00:30,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 17:00:30,844 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 17:00:30,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:30,853 INFO L225 Difference]: With dead ends: 4250 [2023-12-02 17:00:30,853 INFO L226 Difference]: Without dead ends: 2760 [2023-12-02 17:00:30,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 247 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=165, Invalid=1241, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 17:00:30,857 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 17:00:30,857 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 17:00:30,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2023-12-02 17:00:31,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2570. [2023-12-02 17:00:31,162 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 17:00:31,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 2996 transitions. [2023-12-02 17:00:31,173 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 2996 transitions. Word has length 137 [2023-12-02 17:00:31,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:31,173 INFO L495 AbstractCegarLoop]: Abstraction has 2570 states and 2996 transitions. [2023-12-02 17:00:31,174 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 17:00:31,174 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 2996 transitions. [2023-12-02 17:00:31,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 17:00:31,177 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:31,177 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 17:00:31,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-02 17:00:31,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:31,378 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 17:00:31,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:31,379 INFO L85 PathProgramCache]: Analyzing trace with hash -40729429, now seen corresponding path program 3 times [2023-12-02 17:00:31,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:00:31,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158223123] [2023-12-02 17:00:31,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:31,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:00:31,392 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:00:31,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887756664] [2023-12-02 17:00:31,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:00:31,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:31,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:31,394 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:31,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-02 17:00:31,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:00:31,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:00:31,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:00:31,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:31,605 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 17:00:31,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:31,707 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 17:00:31,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:00:31,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158223123] [2023-12-02 17:00:31,707 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:00:31,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887756664] [2023-12-02 17:00:31,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887756664] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:31,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1393996792] [2023-12-02 17:00:31,709 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:00:31,709 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:00:31,709 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:00:31,709 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:00:31,709 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:00:32,583 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:00:32,595 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:00:32,615 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:00:35,255 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 17:00:35,255 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:00:35,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:00:35,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2023-12-02 17:00:35,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326494294] [2023-12-02 17:00:35,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:00:35,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 17:00:35,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:00:35,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 17:00:35,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 17:00:35,257 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 17:00:35,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:35,759 INFO L93 Difference]: Finished difference Result 5158 states and 6039 transitions. [2023-12-02 17:00:35,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:00:35,759 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 17:00:35,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:35,772 INFO L225 Difference]: With dead ends: 5158 [2023-12-02 17:00:35,772 INFO L226 Difference]: Without dead ends: 3604 [2023-12-02 17:00:35,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 367 SyntacticMatches, 11 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 17:00:35,775 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 17:00:35,776 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 17:00:35,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3604 states. [2023-12-02 17:00:35,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3604 to 2739. [2023-12-02 17:00:35,998 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 17:00:36,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 3172 transitions. [2023-12-02 17:00:36,005 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 3172 transitions. Word has length 137 [2023-12-02 17:00:36,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:36,006 INFO L495 AbstractCegarLoop]: Abstraction has 2739 states and 3172 transitions. [2023-12-02 17:00:36,006 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 17:00:36,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 3172 transitions. [2023-12-02 17:00:36,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-12-02 17:00:36,009 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:36,009 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 17:00:36,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-02 17:00:36,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-02 17:00:36,210 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 17:00:36,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:36,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1495905817, now seen corresponding path program 2 times [2023-12-02 17:00:36,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:00:36,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176126642] [2023-12-02 17:00:36,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:36,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:00:36,224 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:00:36,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102319466] [2023-12-02 17:00:36,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:00:36,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:36,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:36,226 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:36,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-02 17:00:36,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-02 17:00:36,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:00:36,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 17:00:36,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:36,546 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 17:00:36,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:36,807 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 17:00:36,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:00:36,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176126642] [2023-12-02 17:00:36,808 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:00:36,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102319466] [2023-12-02 17:00:36,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102319466] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:36,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [785372660] [2023-12-02 17:00:36,809 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:00:36,809 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:00:36,809 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:00:36,810 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:00:36,810 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:00:37,658 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:00:37,670 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:00:37,691 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:00:40,260 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 17:00:40,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:00:40,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:00:40,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-12-02 17:00:40,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798563393] [2023-12-02 17:00:40,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:00:40,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 17:00:40,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:00:40,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 17:00:40,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 17:00:40,262 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 17:00:40,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:40,719 INFO L93 Difference]: Finished difference Result 2739 states and 3172 transitions. [2023-12-02 17:00:40,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 17:00:40,720 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 17:00:40,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:40,734 INFO L225 Difference]: With dead ends: 2739 [2023-12-02 17:00:40,734 INFO L226 Difference]: Without dead ends: 2738 [2023-12-02 17:00:40,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 361 SyntacticMatches, 23 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=216, Invalid=1424, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 17:00:40,737 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 17:00:40,737 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 17:00:40,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2738 states. [2023-12-02 17:00:40,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2738 to 2656. [2023-12-02 17:00:40,960 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 17:00:40,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 2963 transitions. [2023-12-02 17:00:40,967 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 2963 transitions. Word has length 139 [2023-12-02 17:00:40,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:40,968 INFO L495 AbstractCegarLoop]: Abstraction has 2656 states and 2963 transitions. [2023-12-02 17:00:40,968 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 17:00:40,968 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 2963 transitions. [2023-12-02 17:00:40,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-12-02 17:00:40,972 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:40,972 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 17:00:40,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-02 17:00:41,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-02 17:00:41,172 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 17:00:41,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:41,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1033978295, now seen corresponding path program 4 times [2023-12-02 17:00:41,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:00:41,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750916698] [2023-12-02 17:00:41,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:41,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:00:41,183 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:00:41,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713210634] [2023-12-02 17:00:41,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:00:41,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:41,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:41,184 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:41,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-02 17:00:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:41,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 17:00:41,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:41,465 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 17:00:41,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:41,639 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 17:00:41,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:00:41,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750916698] [2023-12-02 17:00:41,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:00:41,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713210634] [2023-12-02 17:00:41,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713210634] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:41,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [954564927] [2023-12-02 17:00:41,641 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:00:41,642 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:00:41,642 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:00:41,642 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:00:41,642 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:00:42,546 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:00:42,558 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:00:42,578 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:00:45,289 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 17:00:45,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:00:45,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:00:45,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2023-12-02 17:00:45,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751125789] [2023-12-02 17:00:45,290 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:00:45,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 17:00:45,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:00:45,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 17:00:45,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1285, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 17:00:45,292 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 17:00:46,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:46,399 INFO L93 Difference]: Finished difference Result 7428 states and 8285 transitions. [2023-12-02 17:00:46,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 17:00:46,400 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 17:00:46,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:46,422 INFO L225 Difference]: With dead ends: 7428 [2023-12-02 17:00:46,422 INFO L226 Difference]: Without dead ends: 6007 [2023-12-02 17:00:46,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 414 SyntacticMatches, 12 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=303, Invalid=2049, Unknown=0, NotChecked=0, Total=2352 [2023-12-02 17:00:46,426 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 128 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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 17:00:46,426 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 17:00:46,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6007 states. [2023-12-02 17:00:46,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6007 to 3730. [2023-12-02 17:00:46,778 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 17:00:46,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3730 states to 3730 states and 4115 transitions. [2023-12-02 17:00:46,785 INFO L78 Accepts]: Start accepts. Automaton has 3730 states and 4115 transitions. Word has length 155 [2023-12-02 17:00:46,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:46,785 INFO L495 AbstractCegarLoop]: Abstraction has 3730 states and 4115 transitions. [2023-12-02 17:00:46,786 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 17:00:46,786 INFO L276 IsEmpty]: Start isEmpty. Operand 3730 states and 4115 transitions. [2023-12-02 17:00:46,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-12-02 17:00:46,788 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:46,789 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 17:00:46,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-12-02 17:00:46,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-02 17:00:46,989 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 17:00:46,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:46,990 INFO L85 PathProgramCache]: Analyzing trace with hash -270936779, now seen corresponding path program 2 times [2023-12-02 17:00:46,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:00:46,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658153370] [2023-12-02 17:00:46,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:46,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:00:47,001 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:00:47,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1139763172] [2023-12-02 17:00:47,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:00:47,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:47,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:47,002 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:47,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-02 17:00:47,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-02 17:00:47,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:00:47,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 17:00:47,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:47,260 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 17:00:47,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:47,508 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 17:00:47,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:00:47,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658153370] [2023-12-02 17:00:47,508 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:00:47,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139763172] [2023-12-02 17:00:47,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139763172] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:47,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2103629033] [2023-12-02 17:00:47,510 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:00:47,510 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:00:47,510 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:00:47,510 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:00:47,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:00:48,228 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 17:00:48,236 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:00:48,261 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:00:49,906 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 17:00:49,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:00:49,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:00:49,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-12-02 17:00:49,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804784112] [2023-12-02 17:00:49,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:00:49,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:00:49,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:00:49,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:00:49,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 17:00:49,909 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 17:00:50,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:50,950 INFO L93 Difference]: Finished difference Result 7115 states and 7875 transitions. [2023-12-02 17:00:50,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 17:00:50,950 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 17:00:50,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:50,979 INFO L225 Difference]: With dead ends: 7115 [2023-12-02 17:00:50,979 INFO L226 Difference]: Without dead ends: 7114 [2023-12-02 17:00:50,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 17:00:50,981 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 17:00:50,982 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 17:00:50,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7114 states. [2023-12-02 17:00:51,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7114 to 7080. [2023-12-02 17:00:51,568 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 17:00:51,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7080 states to 7080 states and 7825 transitions. [2023-12-02 17:00:51,579 INFO L78 Accepts]: Start accepts. Automaton has 7080 states and 7825 transitions. Word has length 168 [2023-12-02 17:00:51,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:51,580 INFO L495 AbstractCegarLoop]: Abstraction has 7080 states and 7825 transitions. [2023-12-02 17:00:51,580 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 17:00:51,580 INFO L276 IsEmpty]: Start isEmpty. Operand 7080 states and 7825 transitions. [2023-12-02 17:00:51,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-12-02 17:00:51,583 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:51,583 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 17:00:51,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-02 17:00:51,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-02 17:00:51,783 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 17:00:51,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:51,784 INFO L85 PathProgramCache]: Analyzing trace with hash -2083676421, now seen corresponding path program 5 times [2023-12-02 17:00:51,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:00:51,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33277885] [2023-12-02 17:00:51,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:51,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:00:51,797 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:00:51,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829232596] [2023-12-02 17:00:51,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:00:51,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:51,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:51,798 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:51,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-02 17:00:51,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 17:00:51,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:00:51,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 17:00:51,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:52,331 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 17:00:52,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:53,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:00:53,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33277885] [2023-12-02 17:00:53,079 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:00:53,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829232596] [2023-12-02 17:00:53,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829232596] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:00:53,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [467990387] [2023-12-02 17:00:53,080 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:00:53,080 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:00:53,080 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:00:53,081 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:00:53,081 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:00:53,977 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:00:53,989 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:00:54,009 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:00:58,830 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 17:00:58,830 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:00:58,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:00:58,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-12-02 17:00:58,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707839371] [2023-12-02 17:00:58,831 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:00:58,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 17:00:58,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:00:58,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 17:00:58,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 17:00:58,833 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 17:00:59,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:59,581 INFO L93 Difference]: Finished difference Result 11917 states and 13168 transitions. [2023-12-02 17:00:59,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 17:00:59,582 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 17:00:59,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:59,594 INFO L225 Difference]: With dead ends: 11917 [2023-12-02 17:00:59,594 INFO L226 Difference]: Without dead ends: 6369 [2023-12-02 17:00:59,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 331 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=213, Invalid=1427, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 17:00:59,605 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 17:00:59,605 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 17:00:59,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6369 states. [2023-12-02 17:01:00,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6369 to 6111. [2023-12-02 17:01:00,097 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 17:01:00,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6111 states to 6111 states and 6757 transitions. [2023-12-02 17:01:00,105 INFO L78 Accepts]: Start accepts. Automaton has 6111 states and 6757 transitions. Word has length 173 [2023-12-02 17:01:00,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:01:00,106 INFO L495 AbstractCegarLoop]: Abstraction has 6111 states and 6757 transitions. [2023-12-02 17:01:00,106 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 17:01:00,106 INFO L276 IsEmpty]: Start isEmpty. Operand 6111 states and 6757 transitions. [2023-12-02 17:01:00,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2023-12-02 17:01:00,108 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:01:00,108 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 17:01:00,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-12-02 17:01:00,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 17:01:00,309 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 17:01:00,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:01:00,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1068540697, now seen corresponding path program 6 times [2023-12-02 17:01:00,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:01:00,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721273115] [2023-12-02 17:01:00,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:00,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:01:00,322 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:01:00,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161831687] [2023-12-02 17:01:00,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:01:00,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:01:00,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:01:00,323 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:01:00,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-02 17:01:00,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:01:00,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:01:00,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 17:01:00,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:01:00,905 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 17:01:00,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:01:01,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:01:01,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721273115] [2023-12-02 17:01:01,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:01:01,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161831687] [2023-12-02 17:01:01,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161831687] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:01:01,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2041130655] [2023-12-02 17:01:01,015 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:01:01,015 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:01:01,016 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:01:01,016 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:01:01,016 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:01:01,904 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:01:01,915 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:01:01,935 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:01:05,249 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 17:01:05,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:01:05,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:01:05,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-12-02 17:01:05,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101507702] [2023-12-02 17:01:05,250 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:01:05,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 17:01:05,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:01:05,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 17:01:05,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 17:01:05,252 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 17:01:05,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:01:05,927 INFO L93 Difference]: Finished difference Result 6466 states and 7146 transitions. [2023-12-02 17:01:05,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 17:01:05,927 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 17:01:05,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:01:05,941 INFO L225 Difference]: With dead ends: 6466 [2023-12-02 17:01:05,941 INFO L226 Difference]: Without dead ends: 6465 [2023-12-02 17:01:05,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 338 SyntacticMatches, 22 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 17:01:05,945 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 17:01:05,945 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 17:01:05,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6465 states. [2023-12-02 17:01:06,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6465 to 6175. [2023-12-02 17:01:06,587 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 17:01:06,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6175 states to 6175 states and 6825 transitions. [2023-12-02 17:01:06,601 INFO L78 Accepts]: Start accepts. Automaton has 6175 states and 6825 transitions. Word has length 191 [2023-12-02 17:01:06,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:01:06,601 INFO L495 AbstractCegarLoop]: Abstraction has 6175 states and 6825 transitions. [2023-12-02 17:01:06,602 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 17:01:06,602 INFO L276 IsEmpty]: Start isEmpty. Operand 6175 states and 6825 transitions. [2023-12-02 17:01:06,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-12-02 17:01:06,606 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:01:06,606 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 17:01:06,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-12-02 17:01:06,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-02 17:01:06,807 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 17:01:06,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:01:06,807 INFO L85 PathProgramCache]: Analyzing trace with hash -159477006, now seen corresponding path program 3 times [2023-12-02 17:01:06,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:01:06,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557381583] [2023-12-02 17:01:06,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:06,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:01:06,823 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:01:06,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653979708] [2023-12-02 17:01:06,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:01:06,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:01:06,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:01:06,824 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:01:06,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-02 17:01:06,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:01:06,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:01:06,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 17:01:06,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:01:07,127 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 17:01:07,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:01:07,460 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 17:01:07,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:01:07,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557381583] [2023-12-02 17:01:07,460 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:01:07,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653979708] [2023-12-02 17:01:07,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653979708] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:01:07,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1947386782] [2023-12-02 17:01:07,462 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:01:07,462 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:01:07,462 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:01:07,462 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:01:07,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:01:08,164 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 17:01:08,170 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:01:08,191 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:01:09,520 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 17:01:09,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:01:09,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:01:09,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2023-12-02 17:01:09,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203754478] [2023-12-02 17:01:09,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:01:09,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 17:01:09,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:01:09,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 17:01:09,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1307, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 17:01:09,523 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 17:01:10,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:01:10,695 INFO L93 Difference]: Finished difference Result 11392 states and 12866 transitions. [2023-12-02 17:01:10,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 17:01:10,695 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 17:01:10,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:01:10,714 INFO L225 Difference]: With dead ends: 11392 [2023-12-02 17:01:10,714 INFO L226 Difference]: Without dead ends: 11391 [2023-12-02 17:01:10,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 551 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=333, Invalid=1307, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 17:01:10,717 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 17:01:10,718 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 17:01:10,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11391 states. [2023-12-02 17:01:11,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11391 to 10591. [2023-12-02 17:01:11,758 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 17:01:11,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10591 states to 10591 states and 11793 transitions. [2023-12-02 17:01:11,777 INFO L78 Accepts]: Start accepts. Automaton has 10591 states and 11793 transitions. Word has length 201 [2023-12-02 17:01:11,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:01:11,778 INFO L495 AbstractCegarLoop]: Abstraction has 10591 states and 11793 transitions. [2023-12-02 17:01:11,778 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 17:01:11,778 INFO L276 IsEmpty]: Start isEmpty. Operand 10591 states and 11793 transitions. [2023-12-02 17:01:11,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-12-02 17:01:11,780 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:01:11,781 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 17:01:11,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-12-02 17:01:11,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-02 17:01:11,981 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 17:01:11,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:01:11,982 INFO L85 PathProgramCache]: Analyzing trace with hash -628357887, now seen corresponding path program 7 times [2023-12-02 17:01:11,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:01:11,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804908741] [2023-12-02 17:01:11,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:11,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:01:11,996 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:01:11,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [152071046] [2023-12-02 17:01:11,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:01:11,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:01:11,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:01:11,998 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:01:12,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-02 17:01:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:01:12,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 17:01:12,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:01:12,438 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 17:01:12,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:01:12,732 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 17:01:12,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:01:12,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804908741] [2023-12-02 17:01:12,733 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:01:12,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152071046] [2023-12-02 17:01:12,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152071046] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:01:12,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [353999441] [2023-12-02 17:01:12,735 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:01:12,735 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:01:12,735 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:01:12,735 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:01:12,735 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:01:13,690 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:01:13,702 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:01:13,723 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:01:17,403 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 17:01:17,404 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:01:17,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:01:17,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2023-12-02 17:01:17,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581181440] [2023-12-02 17:01:17,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:01:17,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 17:01:17,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:01:17,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 17:01:17,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1516, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 17:01:17,406 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 17:01:19,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:01:19,697 INFO L93 Difference]: Finished difference Result 24199 states and 26980 transitions. [2023-12-02 17:01:19,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 17:01:19,697 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 17:01:19,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:01:19,722 INFO L225 Difference]: With dead ends: 24199 [2023-12-02 17:01:19,722 INFO L226 Difference]: Without dead ends: 17579 [2023-12-02 17:01:19,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 631 GetRequests, 554 SyntacticMatches, 31 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=275, Invalid=1981, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 17:01:19,733 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, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:01:19,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 476 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:01:19,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17579 states. [2023-12-02 17:01:20,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17579 to 12120. [2023-12-02 17:01:20,852 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 17:01:20,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12120 states to 12120 states and 13433 transitions. [2023-12-02 17:01:20,870 INFO L78 Accepts]: Start accepts. Automaton has 12120 states and 13433 transitions. Word has length 209 [2023-12-02 17:01:20,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:01:20,870 INFO L495 AbstractCegarLoop]: Abstraction has 12120 states and 13433 transitions. [2023-12-02 17:01:20,871 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 17:01:20,871 INFO L276 IsEmpty]: Start isEmpty. Operand 12120 states and 13433 transitions. [2023-12-02 17:01:20,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-12-02 17:01:20,874 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:01:20,874 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 17:01:20,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-12-02 17:01:21,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:01:21,074 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 17:01:21,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:01:21,075 INFO L85 PathProgramCache]: Analyzing trace with hash -522076567, now seen corresponding path program 8 times [2023-12-02 17:01:21,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:01:21,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647009106] [2023-12-02 17:01:21,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:21,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:01:21,092 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:01:21,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1832862935] [2023-12-02 17:01:21,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:01:21,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:01:21,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:01:21,093 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:01:21,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-02 17:01:21,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-02 17:01:21,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:01:21,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 17:01:21,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:01:21,928 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 17:01:21,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:01:22,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:01:22,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647009106] [2023-12-02 17:01:22,109 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:01:22,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832862935] [2023-12-02 17:01:22,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832862935] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:01:22,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [811186151] [2023-12-02 17:01:22,111 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:01:22,111 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:01:22,111 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:01:22,111 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:01:22,111 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:01:22,975 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:01:22,987 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:01:23,028 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:01:27,011 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 17:01:27,011 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:01:27,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:01:27,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-12-02 17:01:27,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853108505] [2023-12-02 17:01:27,012 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:01:27,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 17:01:27,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:01:27,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 17:01:27,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 17:01:27,013 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 17:01:28,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:01:28,913 INFO L93 Difference]: Finished difference Result 19111 states and 21216 transitions. [2023-12-02 17:01:28,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 17:01:28,914 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 17:01:28,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:01:28,928 INFO L225 Difference]: With dead ends: 19111 [2023-12-02 17:01:28,928 INFO L226 Difference]: Without dead ends: 12594 [2023-12-02 17:01:28,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 403 SyntacticMatches, 26 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=276, Invalid=2274, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 17:01:28,939 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, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:01:28,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 438 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 17:01:28,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12594 states. [2023-12-02 17:01:29,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12594 to 12216. [2023-12-02 17:01:29,931 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 17:01:29,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12216 states to 12216 states and 13535 transitions. [2023-12-02 17:01:29,947 INFO L78 Accepts]: Start accepts. Automaton has 12216 states and 13535 transitions. Word has length 227 [2023-12-02 17:01:29,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:01:29,948 INFO L495 AbstractCegarLoop]: Abstraction has 12216 states and 13535 transitions. [2023-12-02 17:01:29,948 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 17:01:29,948 INFO L276 IsEmpty]: Start isEmpty. Operand 12216 states and 13535 transitions. [2023-12-02 17:01:29,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-12-02 17:01:29,952 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:01:29,952 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 17:01:29,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-12-02 17:01:30,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:01:30,153 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 17:01:30,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:01:30,154 INFO L85 PathProgramCache]: Analyzing trace with hash 564193587, now seen corresponding path program 9 times [2023-12-02 17:01:30,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:01:30,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793409543] [2023-12-02 17:01:30,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:30,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:01:30,170 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:01:30,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765162128] [2023-12-02 17:01:30,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:01:30,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:01:30,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:01:30,172 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:01:30,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-02 17:01:30,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:01:30,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:01:30,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 17:01:30,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:01:30,739 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 17:01:30,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:01:31,181 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 17:01:31,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:01:31,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793409543] [2023-12-02 17:01:31,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:01:31,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765162128] [2023-12-02 17:01:31,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765162128] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:01:31,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [69112281] [2023-12-02 17:01:31,183 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:01:31,183 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:01:31,183 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:01:31,183 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:01:31,183 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:01:32,068 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:01:32,080 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:01:32,099 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:01:36,228 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 17:01:36,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:01:36,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:01:36,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2023-12-02 17:01:36,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203296256] [2023-12-02 17:01:36,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:01:36,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 17:01:36,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:01:36,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 17:01:36,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1468, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 17:01:36,231 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 17:01:41,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:01:41,519 INFO L93 Difference]: Finished difference Result 15653 states and 17344 transitions. [2023-12-02 17:01:41,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-02 17:01:41,520 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 17:01:41,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:01:41,535 INFO L225 Difference]: With dead ends: 15653 [2023-12-02 17:01:41,535 INFO L226 Difference]: Without dead ends: 15652 [2023-12-02 17:01:41,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 613 SyntacticMatches, 27 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1884 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=650, Invalid=4042, Unknown=0, NotChecked=0, Total=4692 [2023-12-02 17:01:41,542 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 17:01:41,542 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 17:01:41,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15652 states. [2023-12-02 17:01:42,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15652 to 15350. [2023-12-02 17:01:42,744 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 17:01:42,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15350 states to 15350 states and 16994 transitions. [2023-12-02 17:01:42,815 INFO L78 Accepts]: Start accepts. Automaton has 15350 states and 16994 transitions. Word has length 227 [2023-12-02 17:01:42,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:01:42,815 INFO L495 AbstractCegarLoop]: Abstraction has 15350 states and 16994 transitions. [2023-12-02 17:01:42,816 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 17:01:42,816 INFO L276 IsEmpty]: Start isEmpty. Operand 15350 states and 16994 transitions. [2023-12-02 17:01:42,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-12-02 17:01:42,819 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:01:42,819 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 17:01:42,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-12-02 17:01:43,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-12-02 17:01:43,020 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 17:01:43,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:01:43,020 INFO L85 PathProgramCache]: Analyzing trace with hash -2077693551, now seen corresponding path program 10 times [2023-12-02 17:01:43,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:01:43,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255583488] [2023-12-02 17:01:43,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:43,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:01:43,031 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:01:43,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988415323] [2023-12-02 17:01:43,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:01:43,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:01:43,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:01:43,033 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:01:43,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-02 17:01:43,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:01:43,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 17:01:43,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:01:43,669 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 17:01:43,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:01:44,650 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 17:01:44,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:01:44,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255583488] [2023-12-02 17:01:44,651 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:01:44,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988415323] [2023-12-02 17:01:44,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988415323] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:01:44,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [106798336] [2023-12-02 17:01:44,652 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:01:44,652 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:01:44,653 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:01:44,653 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:01:44,653 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:01:45,543 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:01:45,554 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:01:45,575 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:01:49,427 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 17:01:49,427 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:01:49,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:01:49,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-12-02 17:01:49,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432881218] [2023-12-02 17:01:49,427 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:01:49,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:01:49,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:01:49,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:01:49,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2023-12-02 17:01:49,429 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 17:01:52,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:01:52,694 INFO L93 Difference]: Finished difference Result 19489 states and 21559 transitions. [2023-12-02 17:01:52,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-02 17:01:52,695 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 17:01:52,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:01:52,714 INFO L225 Difference]: With dead ends: 19489 [2023-12-02 17:01:52,714 INFO L226 Difference]: Without dead ends: 19488 [2023-12-02 17:01:52,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 626 SyntacticMatches, 12 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=665, Invalid=3891, Unknown=0, NotChecked=0, Total=4556 [2023-12-02 17:01:52,718 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, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 17:01:52,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 737 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1506 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 17:01:52,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19488 states. [2023-12-02 17:01:54,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19488 to 19310. [2023-12-02 17:01:54,399 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 17:01:54,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19310 states to 19310 states and 21350 transitions. [2023-12-02 17:01:54,436 INFO L78 Accepts]: Start accepts. Automaton has 19310 states and 21350 transitions. Word has length 227 [2023-12-02 17:01:54,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:01:54,437 INFO L495 AbstractCegarLoop]: Abstraction has 19310 states and 21350 transitions. [2023-12-02 17:01:54,437 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 17:01:54,437 INFO L276 IsEmpty]: Start isEmpty. Operand 19310 states and 21350 transitions. [2023-12-02 17:01:54,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2023-12-02 17:01:54,446 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:01:54,446 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 17:01:54,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-12-02 17:01:54,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-12-02 17:01:54,647 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 17:01:54,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:01:54,647 INFO L85 PathProgramCache]: Analyzing trace with hash -473130103, now seen corresponding path program 11 times [2023-12-02 17:01:54,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:01:54,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930869151] [2023-12-02 17:01:54,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:54,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:01:54,668 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:01:54,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226813992] [2023-12-02 17:01:54,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:01:54,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:01:54,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:01:54,669 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:01:54,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-02 17:01:54,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-02 17:01:54,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:01:54,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 17:01:54,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:01:55,281 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 17:01:55,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:01:55,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:01:55,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930869151] [2023-12-02 17:01:55,431 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:01:55,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226813992] [2023-12-02 17:01:55,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226813992] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:01:55,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1087603629] [2023-12-02 17:01:55,433 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:01:55,434 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:01:55,434 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:01:55,434 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:01:55,434 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:01:56,280 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:01:56,293 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:01:56,313 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:01:59,597 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 17:01:59,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:01:59,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:01:59,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-12-02 17:01:59,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589252624] [2023-12-02 17:01:59,597 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:01:59,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 17:01:59,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:01:59,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 17:01:59,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 17:01:59,599 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 17:02:01,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:02:01,991 INFO L93 Difference]: Finished difference Result 27036 states and 29948 transitions. [2023-12-02 17:02:01,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 17:02:01,992 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 17:02:01,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:02:02,012 INFO L225 Difference]: With dead ends: 27036 [2023-12-02 17:02:02,013 INFO L226 Difference]: Without dead ends: 20535 [2023-12-02 17:02:02,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 557 SyntacticMatches, 16 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=245, Invalid=2511, Unknown=0, NotChecked=0, Total=2756 [2023-12-02 17:02:02,023 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 17:02:02,023 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 17:02:02,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20535 states. [2023-12-02 17:02:03,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20535 to 19330. [2023-12-02 17:02:03,736 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 17:02:03,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19330 states to 19330 states and 21371 transitions. [2023-12-02 17:02:03,762 INFO L78 Accepts]: Start accepts. Automaton has 19330 states and 21371 transitions. Word has length 299 [2023-12-02 17:02:03,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:02:03,763 INFO L495 AbstractCegarLoop]: Abstraction has 19330 states and 21371 transitions. [2023-12-02 17:02:03,763 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 17:02:03,763 INFO L276 IsEmpty]: Start isEmpty. Operand 19330 states and 21371 transitions. [2023-12-02 17:02:03,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2023-12-02 17:02:03,770 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:02:03,770 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 17:02:03,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-12-02 17:02:03,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:02:03,971 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 17:02:03,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:02:03,971 INFO L85 PathProgramCache]: Analyzing trace with hash 837599985, now seen corresponding path program 12 times [2023-12-02 17:02:03,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:02:03,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154529218] [2023-12-02 17:02:03,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:02:03,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:02:03,986 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:02:03,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1016939821] [2023-12-02 17:02:03,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:02:03,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:02:03,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:02:03,987 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:02:03,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-02 17:02:04,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:02:04,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:02:04,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 17:02:04,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:02:04,572 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 17:02:04,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:02:04,981 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 17:02:04,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:02:04,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154529218] [2023-12-02 17:02:04,981 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:02:04,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016939821] [2023-12-02 17:02:04,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016939821] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:02:04,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [787517304] [2023-12-02 17:02:04,983 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:02:04,983 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:02:04,983 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:02:04,983 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:02:04,983 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:02:05,883 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:02:05,897 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:02:05,919 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:02:09,658 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 17:02:09,658 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:02:09,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:02:09,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 28 [2023-12-02 17:02:09,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733869866] [2023-12-02 17:02:09,659 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:02:09,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 17:02:09,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:02:09,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 17:02:09,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=2245, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 17:02:09,661 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 17:02:13,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:02:13,170 INFO L93 Difference]: Finished difference Result 42369 states and 46981 transitions. [2023-12-02 17:02:13,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 17:02:13,171 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 17:02:13,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:02:13,205 INFO L225 Difference]: With dead ends: 42369 [2023-12-02 17:02:13,206 INFO L226 Difference]: Without dead ends: 31324 [2023-12-02 17:02:13,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 873 SyntacticMatches, 27 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2421 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=449, Invalid=3091, Unknown=0, NotChecked=0, Total=3540 [2023-12-02 17:02:13,221 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 17:02:13,221 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 17:02:13,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31324 states. [2023-12-02 17:02:15,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31324 to 23435. [2023-12-02 17:02:15,932 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 17:02:15,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23435 states to 23435 states and 25742 transitions. [2023-12-02 17:02:15,966 INFO L78 Accepts]: Start accepts. Automaton has 23435 states and 25742 transitions. Word has length 317 [2023-12-02 17:02:15,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:02:15,966 INFO L495 AbstractCegarLoop]: Abstraction has 23435 states and 25742 transitions. [2023-12-02 17:02:15,967 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 17:02:15,967 INFO L276 IsEmpty]: Start isEmpty. Operand 23435 states and 25742 transitions. [2023-12-02 17:02:15,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2023-12-02 17:02:15,975 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:02:15,975 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 17:02:15,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-12-02 17:02:16,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:02:16,176 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 17:02:16,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:02:16,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1171726247, now seen corresponding path program 13 times [2023-12-02 17:02:16,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:02:16,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061475893] [2023-12-02 17:02:16,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:02:16,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:02:16,198 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:02:16,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1789764453] [2023-12-02 17:02:16,198 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:02:16,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:02:16,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:02:16,199 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:02:16,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-02 17:02:16,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:02:16,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 17:02:16,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:02:17,170 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 17:02:17,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:02:17,946 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 17:02:17,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:02:17,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061475893] [2023-12-02 17:02:17,946 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:02:17,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789764453] [2023-12-02 17:02:17,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789764453] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:02:17,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2012761154] [2023-12-02 17:02:17,947 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:02:17,947 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:02:17,948 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:02:17,948 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:02:17,948 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:02:18,923 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:02:18,934 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:02:18,956 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:02:23,386 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 17:02:23,386 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:02:23,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:02:23,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2023-12-02 17:02:23,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011365619] [2023-12-02 17:02:23,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:02:23,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 17:02:23,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:02:23,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 17:02:23,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2101, Unknown=0, NotChecked=0, Total=2352 [2023-12-02 17:02:23,389 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 17:02:34,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:02:34,944 INFO L93 Difference]: Finished difference Result 26153 states and 28732 transitions. [2023-12-02 17:02:34,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-12-02 17:02:34,945 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 17:02:34,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:02:34,971 INFO L225 Difference]: With dead ends: 26153 [2023-12-02 17:02:34,971 INFO L226 Difference]: Without dead ends: 26152 [2023-12-02 17:02:34,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1058 GetRequests, 938 SyntacticMatches, 18 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3526 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=1790, Invalid=8922, Unknown=0, NotChecked=0, Total=10712 [2023-12-02 17:02:34,977 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 716 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 2548 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:02:34,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [718 Valid, 972 Invalid, 2723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 2548 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-02 17:02:34,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26152 states. [2023-12-02 17:02:37,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26152 to 25284. [2023-12-02 17:02:37,298 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 17:02:37,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25284 states to 25284 states and 27781 transitions. [2023-12-02 17:02:37,338 INFO L78 Accepts]: Start accepts. Automaton has 25284 states and 27781 transitions. Word has length 335 [2023-12-02 17:02:37,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:02:37,338 INFO L495 AbstractCegarLoop]: Abstraction has 25284 states and 27781 transitions. [2023-12-02 17:02:37,339 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 17:02:37,339 INFO L276 IsEmpty]: Start isEmpty. Operand 25284 states and 27781 transitions. [2023-12-02 17:02:37,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2023-12-02 17:02:37,352 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:02:37,352 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 17:02:37,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-12-02 17:02:37,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-12-02 17:02:37,553 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 17:02:37,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:02:37,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1609462975, now seen corresponding path program 3 times [2023-12-02 17:02:37,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:02:37,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141844952] [2023-12-02 17:02:37,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:02:37,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:02:37,571 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:02:37,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1858171213] [2023-12-02 17:02:37,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:02:37,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:02:37,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:02:37,572 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:02:37,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-12-02 17:02:37,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:02:37,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:02:37,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 17:02:37,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:02:38,111 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 17:02:38,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:02:38,822 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 17:02:38,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:02:38,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141844952] [2023-12-02 17:02:38,822 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:02:38,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858171213] [2023-12-02 17:02:38,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858171213] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:02:38,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1322718481] [2023-12-02 17:02:38,824 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:02:38,824 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:02:38,824 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:02:38,824 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:02:38,824 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:02:39,470 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 17:02:39,480 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:02:39,502 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:02:41,291 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 17:02:41,291 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:02:41,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:02:41,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2023-12-02 17:02:41,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703934276] [2023-12-02 17:02:41,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:02:41,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-02 17:02:41,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:02:41,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-02 17:02:41,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=2561, Unknown=0, NotChecked=0, Total=3422 [2023-12-02 17:02:41,294 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 17:02:45,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:02:45,925 INFO L93 Difference]: Finished difference Result 39099 states and 43041 transitions. [2023-12-02 17:02:45,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-02 17:02:45,925 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 17:02:45,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:02:45,965 INFO L225 Difference]: With dead ends: 39099 [2023-12-02 17:02:45,965 INFO L226 Difference]: Without dead ends: 39098 [2023-12-02 17:02:45,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1042 GetRequests, 985 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=861, Invalid=2561, Unknown=0, NotChecked=0, Total=3422 [2023-12-02 17:02:45,971 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 833 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 17:02:45,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [833 Valid, 526 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 17:02:45,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39098 states. [2023-12-02 17:02:49,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39098 to 39024. [2023-12-02 17:02:49,552 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 17:02:49,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39024 states to 39024 states and 42921 transitions. [2023-12-02 17:02:49,609 INFO L78 Accepts]: Start accepts. Automaton has 39024 states and 42921 transitions. Word has length 348 [2023-12-02 17:02:49,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:02:49,609 INFO L495 AbstractCegarLoop]: Abstraction has 39024 states and 42921 transitions. [2023-12-02 17:02:49,609 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 17:02:49,609 INFO L276 IsEmpty]: Start isEmpty. Operand 39024 states and 42921 transitions. [2023-12-02 17:02:49,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2023-12-02 17:02:49,620 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:02:49,620 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 17:02:49,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-12-02 17:02:49,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-12-02 17:02:49,820 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 17:02:49,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:02:49,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1817617091, now seen corresponding path program 14 times [2023-12-02 17:02:49,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:02:49,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912232588] [2023-12-02 17:02:49,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:02:49,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:02:49,838 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:02:49,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238258492] [2023-12-02 17:02:49,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:02:49,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:02:49,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:02:49,840 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:02:49,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-12-02 17:02:49,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-02 17:02:49,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:02:49,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-02 17:02:49,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:03:01,931 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 17:03:01,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:03:02,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:03:02,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912232588] [2023-12-02 17:03:02,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:03:02,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238258492] [2023-12-02 17:03:02,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238258492] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:03:02,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [939565490] [2023-12-02 17:03:02,542 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:03:02,542 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:03:02,542 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:03:02,542 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:03:02,542 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:03:03,502 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:03:03,514 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:03:03,536 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:03:12,404 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 17:03:12,404 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:03:12,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:03:12,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-12-02 17:03:12,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901132464] [2023-12-02 17:03:12,405 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:03:12,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 17:03:12,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:03:12,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 17:03:12,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2050, Unknown=7, NotChecked=0, Total=2256 [2023-12-02 17:03:12,406 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 17:03:14,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 17:03:15,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 17:03:19,438 WARN L539 Checker$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 17:03:24,036 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 17:03:29,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:03:29,960 INFO L93 Difference]: Finished difference Result 65505 states and 72124 transitions. [2023-12-02 17:03:29,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-02 17:03:29,960 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 17:03:29,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:03:30,002 INFO L225 Difference]: With dead ends: 65505 [2023-12-02 17:03:30,003 INFO L226 Difference]: Without dead ends: 35601 [2023-12-02 17:03:30,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 663 SyntacticMatches, 44 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3493 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=451, Invalid=4798, Unknown=7, NotChecked=0, Total=5256 [2023-12-02 17:03:30,028 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 163 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 2150 mSolverCounterSat, 18 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s 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, 10.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:03:30,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 171 Invalid, 2173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2150 Invalid, 5 Unknown, 0 Unchecked, 10.7s Time] [2023-12-02 17:03:30,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35601 states. [2023-12-02 17:03:33,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35601 to 34768. [2023-12-02 17:03:33,225 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 17:03:33,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34768 states to 34768 states and 38308 transitions. [2023-12-02 17:03:33,277 INFO L78 Accepts]: Start accepts. Automaton has 34768 states and 38308 transitions. Word has length 371 [2023-12-02 17:03:33,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:03:33,278 INFO L495 AbstractCegarLoop]: Abstraction has 34768 states and 38308 transitions. [2023-12-02 17:03:33,278 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 17:03:33,278 INFO L276 IsEmpty]: Start isEmpty. Operand 34768 states and 38308 transitions. [2023-12-02 17:03:33,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2023-12-02 17:03:33,290 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:03:33,290 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 17:03:33,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-12-02 17:03:33,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-12-02 17:03:33,491 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 17:03:33,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:03:33,491 INFO L85 PathProgramCache]: Analyzing trace with hash -179749422, now seen corresponding path program 4 times [2023-12-02 17:03:33,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:03:33,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031307105] [2023-12-02 17:03:33,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:03:33,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:03:33,512 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:03:33,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [698293117] [2023-12-02 17:03:33,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:03:33,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:03:33,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:03:33,513 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:03:33,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-12-02 17:03:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:03:33,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 17:03:33,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:03:34,209 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 17:03:34,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:03:35,103 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 17:03:35,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:03:35,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031307105] [2023-12-02 17:03:35,103 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:03:35,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698293117] [2023-12-02 17:03:35,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698293117] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:03:35,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1033809560] [2023-12-02 17:03:35,105 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:03:35,105 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:03:35,105 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:03:35,105 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:03:35,106 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:03:35,941 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 17:03:35,947 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:03:35,970 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:03:38,245 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 17:03:38,245 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:03:38,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:03:38,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2023-12-02 17:03:38,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913735369] [2023-12-02 17:03:38,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:03:38,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-02 17:03:38,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:03:38,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-02 17:03:38,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1185, Invalid=2975, Unknown=0, NotChecked=0, Total=4160 [2023-12-02 17:03:38,250 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 17:03:44,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:03:44,607 INFO L93 Difference]: Finished difference Result 63974 states and 72051 transitions. [2023-12-02 17:03:44,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-02 17:03:44,607 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 17:03:44,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:03:44,681 INFO L225 Difference]: With dead ends: 63974 [2023-12-02 17:03:44,681 INFO L226 Difference]: Without dead ends: 63973 [2023-12-02 17:03:44,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1249 GetRequests, 1163 SyntacticMatches, 23 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2972 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1185, Invalid=2975, Unknown=0, NotChecked=0, Total=4160 [2023-12-02 17:03:44,689 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 452 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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 17:03:44,689 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 17:03:44,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63973 states. [2023-12-02 17:03:51,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63973 to 58960. [2023-12-02 17:03:51,626 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 17:03:51,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58960 states to 58960 states and 65524 transitions. [2023-12-02 17:03:51,716 INFO L78 Accepts]: Start accepts. Automaton has 58960 states and 65524 transitions. Word has length 417 [2023-12-02 17:03:51,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:03:51,717 INFO L495 AbstractCegarLoop]: Abstraction has 58960 states and 65524 transitions. [2023-12-02 17:03:51,717 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 17:03:51,717 INFO L276 IsEmpty]: Start isEmpty. Operand 58960 states and 65524 transitions. [2023-12-02 17:03:51,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2023-12-02 17:03:51,731 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:03:51,731 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 17:03:51,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-12-02 17:03:51,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-12-02 17:03:51,932 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 17:03:51,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:03:51,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1400905251, now seen corresponding path program 15 times [2023-12-02 17:03:51,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:03:51,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097225469] [2023-12-02 17:03:51,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:03:51,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:03:51,950 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:03:51,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867082063] [2023-12-02 17:03:51,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:03:51,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:03:51,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:03:51,951 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:03:51,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-12-02 17:03:52,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:03:52,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:03:52,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 17:03:52,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:03:53,244 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 17:03:53,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:03:53,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:03:53,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097225469] [2023-12-02 17:03:53,352 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:03:53,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867082063] [2023-12-02 17:03:53,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867082063] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:03:53,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [405184119] [2023-12-02 17:03:53,353 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:03:53,353 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:03:53,353 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:03:53,353 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:03:53,353 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:03:54,259 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:03:54,271 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:03:54,291 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:03:58,895 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 17:03:58,895 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:03:58,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:03:58,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-12-02 17:03:58,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634675530] [2023-12-02 17:03:58,895 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:03:58,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 17:03:58,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:03:58,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 17:03:58,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1255, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 17:03:58,897 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 17:04:04,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:04:04,925 INFO L93 Difference]: Finished difference Result 61569 states and 68420 transitions. [2023-12-02 17:04:04,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 17:04:04,925 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 17:04:04,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:04:04,996 INFO L225 Difference]: With dead ends: 61569 [2023-12-02 17:04:04,996 INFO L226 Difference]: Without dead ends: 61568 [2023-12-02 17:04:05,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 898 GetRequests, 837 SyntacticMatches, 24 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 17:04:05,006 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 17:04:05,006 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 17:04:05,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61568 states. [2023-12-02 17:04:10,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61568 to 60696. [2023-12-02 17:04:10,706 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 17:04:10,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60696 states to 60696 states and 67452 transitions. [2023-12-02 17:04:10,793 INFO L78 Accepts]: Start accepts. Automaton has 60696 states and 67452 transitions. Word has length 443 [2023-12-02 17:04:10,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:04:10,793 INFO L495 AbstractCegarLoop]: Abstraction has 60696 states and 67452 transitions. [2023-12-02 17:04:10,794 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 17:04:10,794 INFO L276 IsEmpty]: Start isEmpty. Operand 60696 states and 67452 transitions. [2023-12-02 17:04:10,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2023-12-02 17:04:10,807 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:04:10,808 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 17:04:10,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-12-02 17:04:11,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-12-02 17:04:11,008 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 17:04:11,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:04:11,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1597742163, now seen corresponding path program 16 times [2023-12-02 17:04:11,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:04:11,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270489848] [2023-12-02 17:04:11,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:04:11,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:04:11,030 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:04:11,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1474850215] [2023-12-02 17:04:11,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:04:11,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:04:11,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:04:11,032 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:04:11,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-12-02 17:04:11,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:04:11,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 17:04:11,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:04:11,652 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 17:04:11,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:04:11,991 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 17:04:11,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:04:11,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270489848] [2023-12-02 17:04:11,991 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:04:11,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474850215] [2023-12-02 17:04:11,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474850215] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:04:11,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1071091349] [2023-12-02 17:04:11,992 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:04:11,992 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:04:11,992 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:04:11,992 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:04:11,992 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:04:12,808 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:04:12,820 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:04:12,840 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:04:17,704 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 17:04:17,704 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:04:17,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:04:17,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2023-12-02 17:04:17,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107117232] [2023-12-02 17:04:17,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:04:17,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 17:04:17,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:04:17,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 17:04:17,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1972, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 17:04:17,707 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 17:04:32,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:04:32,306 INFO L93 Difference]: Finished difference Result 182458 states and 203426 transitions. [2023-12-02 17:04:32,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 17:04:32,307 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 17:04:32,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:04:32,478 INFO L225 Difference]: With dead ends: 182458 [2023-12-02 17:04:32,478 INFO L226 Difference]: Without dead ends: 138848 [2023-12-02 17:04:32,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1451 GetRequests, 1356 SyntacticMatches, 33 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2762 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=513, Invalid=3519, Unknown=0, NotChecked=0, Total=4032 [2023-12-02 17:04:32,514 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 194 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1747 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:04:32,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 942 Invalid, 1758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1747 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 17:04:32,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138848 states. [2023-12-02 17:04:40,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138848 to 71567. [2023-12-02 17:04:40,222 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 17:04:40,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71567 states to 71567 states and 79067 transitions. [2023-12-02 17:04:40,341 INFO L78 Accepts]: Start accepts. Automaton has 71567 states and 79067 transitions. Word has length 479 [2023-12-02 17:04:40,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:04:40,341 INFO L495 AbstractCegarLoop]: Abstraction has 71567 states and 79067 transitions. [2023-12-02 17:04:40,342 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 17:04:40,342 INFO L276 IsEmpty]: Start isEmpty. Operand 71567 states and 79067 transitions. [2023-12-02 17:04:40,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2023-12-02 17:04:40,363 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:04:40,363 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 17:04:40,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-12-02 17:04:40,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-12-02 17:04:40,563 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 17:04:40,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:04:40,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1910157673, now seen corresponding path program 17 times [2023-12-02 17:04:40,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:04:40,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417117878] [2023-12-02 17:04:40,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:04:40,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:04:40,585 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:04:40,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1501473457] [2023-12-02 17:04:40,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:04:40,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:04:40,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:04:40,586 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:04:40,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-12-02 17:04:40,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-12-02 17:04:40,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:04:40,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 17:04:40,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:04:41,492 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 17:04:41,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:04:41,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:04:41,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417117878] [2023-12-02 17:04:41,848 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:04:41,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501473457] [2023-12-02 17:04:41,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501473457] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:04:41,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [397158384] [2023-12-02 17:04:41,849 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:04:41,849 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:04:41,849 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:04:41,850 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:04:41,850 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:04:42,729 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:04:42,742 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:04:42,764 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:04:48,874 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 17:04:48,875 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:04:48,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:04:48,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-12-02 17:04:48,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968977308] [2023-12-02 17:04:48,875 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:04:48,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 17:04:48,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:04:48,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 17:04:48,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1411, Unknown=0, NotChecked=0, Total=1560 [2023-12-02 17:04:48,877 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 17:04:57,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:04:57,894 INFO L93 Difference]: Finished difference Result 101629 states and 112598 transitions. [2023-12-02 17:04:57,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-02 17:04:57,895 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 17:04:57,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:04:57,981 INFO L225 Difference]: With dead ends: 101629 [2023-12-02 17:04:57,981 INFO L226 Difference]: Without dead ends: 73228 [2023-12-02 17:04:58,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1060 GetRequests, 945 SyntacticMatches, 58 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=277, Invalid=3145, Unknown=0, NotChecked=0, Total=3422 [2023-12-02 17:04:58,004 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 181 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 2697 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:04:58,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 1120 Invalid, 2709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2697 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 17:04:58,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73228 states. [2023-12-02 17:05:05,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73228 to 70960. [2023-12-02 17:05:05,247 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 17:05:05,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70960 states to 70960 states and 78383 transitions. [2023-12-02 17:05:05,355 INFO L78 Accepts]: Start accepts. Automaton has 70960 states and 78383 transitions. Word has length 515 [2023-12-02 17:05:05,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:05:05,356 INFO L495 AbstractCegarLoop]: Abstraction has 70960 states and 78383 transitions. [2023-12-02 17:05:05,356 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 17:05:05,356 INFO L276 IsEmpty]: Start isEmpty. Operand 70960 states and 78383 transitions. [2023-12-02 17:05:05,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2023-12-02 17:05:05,373 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:05:05,373 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 17:05:05,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-12-02 17:05:05,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-12-02 17:05:05,574 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 17:05:05,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:05:05,574 INFO L85 PathProgramCache]: Analyzing trace with hash 371994163, now seen corresponding path program 18 times [2023-12-02 17:05:05,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:05:05,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302820958] [2023-12-02 17:05:05,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:05:05,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:05:05,596 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:05:05,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395360602] [2023-12-02 17:05:05,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:05:05,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:05:05,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:05:05,597 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:05:05,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-12-02 17:05:05,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:05:05,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:05:05,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 17:05:05,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:05:06,452 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 17:05:06,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:05:06,938 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 17:05:06,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:05:06,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302820958] [2023-12-02 17:05:06,938 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:05:06,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395360602] [2023-12-02 17:05:06,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395360602] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:05:06,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [219535426] [2023-12-02 17:05:06,940 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:05:06,940 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:05:06,940 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:05:06,940 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:05:06,940 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:05:07,800 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:05:07,813 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:05:07,838 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:05:14,515 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 17:05:14,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:05:14,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:05:14,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 31 [2023-12-02 17:05:14,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726475924] [2023-12-02 17:05:14,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:05:14,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 17:05:14,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:05:14,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 17:05:14,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=2516, Unknown=0, NotChecked=0, Total=2862 [2023-12-02 17:05:14,518 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 17:05:26,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:05:26,591 INFO L93 Difference]: Finished difference Result 150647 states and 167246 transitions. [2023-12-02 17:05:26,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 17:05:26,592 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 17:05:26,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:05:26,740 INFO L225 Difference]: With dead ends: 150647 [2023-12-02 17:05:26,740 INFO L226 Difference]: Without dead ends: 112304 [2023-12-02 17:05:26,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1553 GetRequests, 1421 SyntacticMatches, 70 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5377 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=521, Invalid=3511, Unknown=0, NotChecked=0, Total=4032 [2023-12-02 17:05:26,771 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 71 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:05:26,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 1002 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1730 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 17:05:26,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112304 states. [2023-12-02 17:05:35,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112304 to 78910. [2023-12-02 17:05:35,245 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 17:05:35,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78910 states to 78910 states and 86861 transitions. [2023-12-02 17:05:35,365 INFO L78 Accepts]: Start accepts. Automaton has 78910 states and 86861 transitions. Word has length 515 [2023-12-02 17:05:35,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:05:35,366 INFO L495 AbstractCegarLoop]: Abstraction has 78910 states and 86861 transitions. [2023-12-02 17:05:35,366 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 17:05:35,366 INFO L276 IsEmpty]: Start isEmpty. Operand 78910 states and 86861 transitions. [2023-12-02 17:05:35,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2023-12-02 17:05:35,384 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:05:35,385 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 17:05:35,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-12-02 17:05:35,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:05:35,585 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 17:05:35,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:05:35,586 INFO L85 PathProgramCache]: Analyzing trace with hash 212371069, now seen corresponding path program 19 times [2023-12-02 17:05:35,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:05:35,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254958764] [2023-12-02 17:05:35,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:05:35,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:05:35,608 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:05:35,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1996502607] [2023-12-02 17:05:35,608 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:05:35,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:05:35,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:05:35,610 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:05:35,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-12-02 17:05:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:05:35,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 17:05:35,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:05:37,209 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 17:05:37,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:05:39,836 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 17:05:39,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:05:39,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254958764] [2023-12-02 17:05:39,836 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:05:39,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996502607] [2023-12-02 17:05:39,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996502607] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:05:39,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [162685239] [2023-12-02 17:05:39,838 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:05:39,839 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:05:39,839 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:05:39,839 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:05:39,839 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:05:40,774 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:05:40,787 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:05:40,810 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:05:48,064 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 17:05:48,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:05:48,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:05:48,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2023-12-02 17:05:48,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715934819] [2023-12-02 17:05:48,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:05:48,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 17:05:48,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:05:48,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 17:05:48,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2119, Unknown=0, NotChecked=0, Total=2352 [2023-12-02 17:05:48,067 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 17:06:01,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:06:01,611 INFO L93 Difference]: Finished difference Result 92273 states and 101635 transitions. [2023-12-02 17:06:01,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-12-02 17:06:01,612 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 17:06:01,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:06:01,724 INFO L225 Difference]: With dead ends: 92273 [2023-12-02 17:06:01,724 INFO L226 Difference]: Without dead ends: 92272 [2023-12-02 17:06:01,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1601 GetRequests, 1436 SyntacticMatches, 60 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4896 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1791, Invalid=9551, Unknown=0, NotChecked=0, Total=11342 [2023-12-02 17:06:01,739 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 499 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 2967 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:06:01,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 1167 Invalid, 3131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 2967 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 17:06:01,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92272 states. [2023-12-02 17:06:10,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92272 to 85759. [2023-12-02 17:06:10,615 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 17:06:10,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85759 states to 85759 states and 94379 transitions. [2023-12-02 17:06:10,749 INFO L78 Accepts]: Start accepts. Automaton has 85759 states and 94379 transitions. Word has length 515 [2023-12-02 17:06:10,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:06:10,750 INFO L495 AbstractCegarLoop]: Abstraction has 85759 states and 94379 transitions. [2023-12-02 17:06:10,750 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 17:06:10,750 INFO L276 IsEmpty]: Start isEmpty. Operand 85759 states and 94379 transitions. [2023-12-02 17:06:10,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2023-12-02 17:06:10,778 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:06:10,778 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 17:06:10,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-12-02 17:06:10,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:06:10,979 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 17:06:10,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:06:10,979 INFO L85 PathProgramCache]: Analyzing trace with hash -632059295, now seen corresponding path program 20 times [2023-12-02 17:06:10,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:06:10,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106884147] [2023-12-02 17:06:10,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:06:10,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:06:11,002 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:06:11,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240230631] [2023-12-02 17:06:11,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:06:11,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:06:11,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:06:11,004 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:06:11,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-12-02 17:06:11,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2023-12-02 17:06:11,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:06:11,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 73 conjunts are in the unsatisfiable core [2023-12-02 17:06:11,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:06:12,500 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 17:06:12,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:06:12,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:06:12,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106884147] [2023-12-02 17:06:12,715 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:06:12,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240230631] [2023-12-02 17:06:12,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240230631] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:06:12,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [134696482] [2023-12-02 17:06:12,717 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:06:12,717 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:06:12,717 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:06:12,717 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:06:12,717 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:06:13,811 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:06:13,822 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:06:13,841 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:06:20,065 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 17:06:20,065 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:06:20,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:06:20,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-12-02 17:06:20,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644498115] [2023-12-02 17:06:20,066 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:06:20,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 17:06:20,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:06:20,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 17:06:20,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1763, Unknown=0, NotChecked=0, Total=1980 [2023-12-02 17:06:20,067 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 17:06:28,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:06:28,090 INFO L93 Difference]: Finished difference Result 119983 states and 132015 transitions. [2023-12-02 17:06:28,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 17:06:28,090 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 17:06:28,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:06:28,176 INFO L225 Difference]: With dead ends: 119983 [2023-12-02 17:06:28,176 INFO L226 Difference]: Without dead ends: 70831 [2023-12-02 17:06:28,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1055 GetRequests, 928 SyntacticMatches, 70 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4079 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=382, Invalid=3040, Unknown=0, NotChecked=0, Total=3422 [2023-12-02 17:06:28,200 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 17:06:28,200 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 17:06:28,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70831 states. [2023-12-02 17:06:35,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70831 to 70830. [2023-12-02 17:06:35,615 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 17:06:35,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70830 states to 70830 states and 77945 transitions. [2023-12-02 17:06:35,721 INFO L78 Accepts]: Start accepts. Automaton has 70830 states and 77945 transitions. Word has length 515 [2023-12-02 17:06:35,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:06:35,721 INFO L495 AbstractCegarLoop]: Abstraction has 70830 states and 77945 transitions. [2023-12-02 17:06:35,721 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 17:06:35,721 INFO L276 IsEmpty]: Start isEmpty. Operand 70830 states and 77945 transitions. [2023-12-02 17:06:35,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2023-12-02 17:06:35,731 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:06:35,732 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 17:06:35,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-12-02 17:06:35,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-12-02 17:06:35,932 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 17:06:35,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:06:35,932 INFO L85 PathProgramCache]: Analyzing trace with hash -2020269871, now seen corresponding path program 21 times [2023-12-02 17:06:35,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:06:35,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945188859] [2023-12-02 17:06:35,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:06:35,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:06:35,950 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:06:35,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001170721] [2023-12-02 17:06:35,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:06:35,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:06:35,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:06:35,951 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:06:35,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-12-02 17:06:36,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:06:36,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:06:36,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 17:06:36,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:06:37,086 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 17:06:37,086 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:06:37,901 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 17:06:37,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:06:37,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945188859] [2023-12-02 17:06:37,901 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:06:37,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001170721] [2023-12-02 17:06:37,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001170721] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:06:37,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1417174644] [2023-12-02 17:06:37,902 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:06:37,903 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:06:37,903 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:06:37,903 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:06:37,903 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:06:38,882 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:06:38,895 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:06:38,921 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:06:45,873 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 17:06:45,874 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:06:45,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:06:45,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 51 [2023-12-02 17:06:45,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895586776] [2023-12-02 17:06:45,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:06:45,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-02 17:06:45,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:06:45,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-02 17:06:45,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=904, Invalid=4498, Unknown=0, NotChecked=0, Total=5402 [2023-12-02 17:06:45,877 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 17:07:04,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:07:04,141 INFO L93 Difference]: Finished difference Result 185906 states and 206035 transitions. [2023-12-02 17:07:04,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-12-02 17:07:04,142 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 17:07:04,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:07:04,330 INFO L225 Difference]: With dead ends: 185906 [2023-12-02 17:07:04,330 INFO L226 Difference]: Without dead ends: 149065 [2023-12-02 17:07:04,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1635 GetRequests, 1454 SyntacticMatches, 71 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10288 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=2137, Invalid=10295, Unknown=0, NotChecked=0, Total=12432 [2023-12-02 17:07:04,360 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, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:07:04,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 2566 Invalid, 4983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 4958 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 17:07:04,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149065 states. [2023-12-02 17:07:15,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149065 to 94019. [2023-12-02 17:07:15,235 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 17:07:15,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94019 states to 94019 states and 102640 transitions. [2023-12-02 17:07:15,380 INFO L78 Accepts]: Start accepts. Automaton has 94019 states and 102640 transitions. Word has length 533 [2023-12-02 17:07:15,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:07:15,380 INFO L495 AbstractCegarLoop]: Abstraction has 94019 states and 102640 transitions. [2023-12-02 17:07:15,381 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 17:07:15,381 INFO L276 IsEmpty]: Start isEmpty. Operand 94019 states and 102640 transitions. [2023-12-02 17:07:15,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2023-12-02 17:07:15,396 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:07:15,396 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 17:07:15,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-12-02 17:07:15,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-12-02 17:07:15,596 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 17:07:15,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:07:15,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1841017413, now seen corresponding path program 22 times [2023-12-02 17:07:15,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:07:15,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862843812] [2023-12-02 17:07:15,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:07:15,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:07:15,616 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:07:15,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957105188] [2023-12-02 17:07:15,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:07:15,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:07:15,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:07:15,618 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:07:15,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-12-02 17:07:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:07:15,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 17:07:15,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:07:17,364 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 17:07:17,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:07:20,775 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 17:07:20,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:07:20,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862843812] [2023-12-02 17:07:20,775 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:07:20,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957105188] [2023-12-02 17:07:20,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957105188] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:07:20,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [740184536] [2023-12-02 17:07:20,777 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:07:20,777 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:07:20,777 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:07:20,778 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:07:20,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:07:21,668 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:07:21,680 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:07:21,701 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:07:30,687 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 17:07:30,687 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:07:30,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:07:30,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2023-12-02 17:07:30,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917380330] [2023-12-02 17:07:30,688 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:07:30,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 17:07:30,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:07:30,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 17:07:30,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=2293, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 17:07:30,690 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 17:07:48,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:07:48,034 INFO L93 Difference]: Finished difference Result 122417 states and 133684 transitions. [2023-12-02 17:07:48,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-12-02 17:07:48,035 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 17:07:48,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:07:48,191 INFO L225 Difference]: With dead ends: 122417 [2023-12-02 17:07:48,191 INFO L226 Difference]: Without dead ends: 122416 [2023-12-02 17:07:48,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1810 GetRequests, 1638 SyntacticMatches, 72 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4639 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=1592, Invalid=8710, Unknown=0, NotChecked=0, Total=10302 [2023-12-02 17:07:48,205 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 404 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 3099 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 17:07:48,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 1397 Invalid, 3248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 3099 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 17:07:48,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122416 states. [2023-12-02 17:08:01,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122416 to 118784. [2023-12-02 17:08:01,250 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 17:08:01,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118784 states to 118784 states and 129618 transitions. [2023-12-02 17:08:01,434 INFO L78 Accepts]: Start accepts. Automaton has 118784 states and 129618 transitions. Word has length 587 [2023-12-02 17:08:01,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:08:01,434 INFO L495 AbstractCegarLoop]: Abstraction has 118784 states and 129618 transitions. [2023-12-02 17:08:01,434 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 17:08:01,434 INFO L276 IsEmpty]: Start isEmpty. Operand 118784 states and 129618 transitions. [2023-12-02 17:08:01,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 678 [2023-12-02 17:08:01,456 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:08:01,456 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 17:08:01,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-12-02 17:08:01,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-12-02 17:08:01,657 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 17:08:01,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:08:01,657 INFO L85 PathProgramCache]: Analyzing trace with hash 497912923, now seen corresponding path program 23 times [2023-12-02 17:08:01,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:08:01,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571356786] [2023-12-02 17:08:01,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:08:01,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:08:01,683 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:08:01,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563524951] [2023-12-02 17:08:01,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:08:01,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:08:01,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:08:01,684 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:08:01,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-12-02 17:08:02,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-12-02 17:08:02,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:08:02,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 17:08:02,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:08:03,062 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 17:08:03,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:08:03,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:08:03,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571356786] [2023-12-02 17:08:03,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:08:03,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563524951] [2023-12-02 17:08:03,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563524951] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:08:03,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1307980628] [2023-12-02 17:08:03,230 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:08:03,230 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:08:03,230 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:08:03,231 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:08:03,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:08:04,263 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:08:04,281 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:08:04,302 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:08:12,494 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 17:08:12,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:08:12,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:08:12,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-12-02 17:08:12,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625506263] [2023-12-02 17:08:12,495 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:08:12,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 17:08:12,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:08:12,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 17:08:12,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1571, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 17:08:12,496 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 17:08:27,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:08:27,859 INFO L93 Difference]: Finished difference Result 199958 states and 218578 transitions. [2023-12-02 17:08:27,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 17:08:27,860 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 17:08:27,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:08:28,011 INFO L225 Difference]: With dead ends: 199958 [2023-12-02 17:08:28,011 INFO L226 Difference]: Without dead ends: 118791 [2023-12-02 17:08:28,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1377 GetRequests, 1248 SyntacticMatches, 77 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2463 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=243, Invalid=2619, Unknown=0, NotChecked=0, Total=2862 [2023-12-02 17:08:28,053 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 295 mSDsluCounter, 1737 mSDsCounter, 0 mSdLazyCounter, 3317 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:08:28,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 1919 Invalid, 3342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 3317 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 17:08:28,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118791 states. [2023-12-02 17:08:41,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118791 to 118784. [2023-12-02 17:08:41,339 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 17:08:41,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118784 states to 118784 states and 129543 transitions. [2023-12-02 17:08:41,534 INFO L78 Accepts]: Start accepts. Automaton has 118784 states and 129543 transitions. Word has length 677 [2023-12-02 17:08:41,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:08:41,534 INFO L495 AbstractCegarLoop]: Abstraction has 118784 states and 129543 transitions. [2023-12-02 17:08:41,534 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 17:08:41,535 INFO L276 IsEmpty]: Start isEmpty. Operand 118784 states and 129543 transitions. [2023-12-02 17:08:41,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 696 [2023-12-02 17:08:41,558 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:08:41,558 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 17:08:41,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-12-02 17:08:41,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-12-02 17:08:41,759 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 17:08:41,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:08:41,759 INFO L85 PathProgramCache]: Analyzing trace with hash 826231161, now seen corresponding path program 24 times [2023-12-02 17:08:41,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:08:41,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102887781] [2023-12-02 17:08:41,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:08:41,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:08:41,787 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:08:41,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307442585] [2023-12-02 17:08:41,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:08:41,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:08:41,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:08:41,788 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:08:41,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-12-02 17:08:42,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:08:42,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:08:42,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 1082 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-02 17:08:42,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:08:44,015 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 17:08:44,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:08:44,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:08:44,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102887781] [2023-12-02 17:08:44,182 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:08:44,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307442585] [2023-12-02 17:08:44,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307442585] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:08:44,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1409537180] [2023-12-02 17:08:44,184 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:08:44,184 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:08:44,184 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:08:44,184 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:08:44,184 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:08:45,315 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:08:45,329 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:08:45,352 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:08:54,571 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 17:08:54,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:08:54,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:08:54,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-12-02 17:08:54,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782667621] [2023-12-02 17:08:54,571 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:08:54,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 17:08:54,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:08:54,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 17:08:54,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2190, Unknown=0, NotChecked=0, Total=2352 [2023-12-02 17:08:54,573 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 17:09:09,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:09:09,883 INFO L93 Difference]: Finished difference Result 120301 states and 131210 transitions. [2023-12-02 17:09:09,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 17:09:09,884 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 17:09:09,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:09:10,039 INFO L225 Difference]: With dead ends: 120301 [2023-12-02 17:09:10,039 INFO L226 Difference]: Without dead ends: 120300 [2023-12-02 17:09:10,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1402 GetRequests, 1276 SyntacticMatches, 78 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1955 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=170, Invalid=2280, Unknown=0, NotChecked=0, Total=2450 [2023-12-02 17:09:10,059 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 49 mSDsluCounter, 2164 mSDsCounter, 0 mSdLazyCounter, 6171 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s 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, 2.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:09:10,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 2299 Invalid, 6171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6171 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-02 17:09:10,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120300 states. [2023-12-02 17:09:23,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120300 to 119072. [2023-12-02 17:09:23,284 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 17:09:23,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119072 states to 119072 states and 129849 transitions. [2023-12-02 17:09:23,465 INFO L78 Accepts]: Start accepts. Automaton has 119072 states and 129849 transitions. Word has length 695 [2023-12-02 17:09:23,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:09:23,466 INFO L495 AbstractCegarLoop]: Abstraction has 119072 states and 129849 transitions. [2023-12-02 17:09:23,466 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 17:09:23,466 INFO L276 IsEmpty]: Start isEmpty. Operand 119072 states and 129849 transitions. [2023-12-02 17:09:23,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2023-12-02 17:09:23,489 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:09:23,490 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 17:09:23,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-12-02 17:09:23,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-12-02 17:09:23,690 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 17:09:23,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:09:23,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1270239911, now seen corresponding path program 4 times [2023-12-02 17:09:23,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:09:23,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787491822] [2023-12-02 17:09:23,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:09:23,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:09:23,719 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:09:23,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420591604] [2023-12-02 17:09:23,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:09:23,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:09:23,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:09:23,721 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:09:23,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-12-02 17:09:23,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:09:23,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 1209 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-02 17:09:23,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:09:25,135 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 17:09:25,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:09:27,270 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 17:09:27,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:09:27,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787491822] [2023-12-02 17:09:27,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:09:27,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420591604] [2023-12-02 17:09:27,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420591604] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:09:27,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [349482905] [2023-12-02 17:09:27,272 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:09:27,272 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:09:27,272 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:09:27,272 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:09:27,273 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:09:27,973 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 17:09:28,012 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:09:28,034 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:09:30,607 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 17:09:30,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:09:30,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:09:30,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 79 [2023-12-02 17:09:30,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927456909] [2023-12-02 17:09:30,608 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:09:30,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-12-02 17:09:30,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:09:30,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-12-02 17:09:30,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3241, Invalid=6461, Unknown=0, NotChecked=0, Total=9702 [2023-12-02 17:09:30,612 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 17:09:53,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:09:53,467 INFO L93 Difference]: Finished difference Result 189587 states and 206969 transitions. [2023-12-02 17:09:53,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-12-02 17:09:53,468 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 17:09:53,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:09:53,700 INFO L225 Difference]: With dead ends: 189587 [2023-12-02 17:09:53,700 INFO L226 Difference]: Without dead ends: 189586 [2023-12-02 17:09:53,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2122 GetRequests, 2025 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2294 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3241, Invalid=6461, Unknown=0, NotChecked=0, Total=9702 [2023-12-02 17:09:53,720 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1621 mSDsluCounter, 1060 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:09:53,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1621 Valid, 1081 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-02 17:09:53,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189586 states. [2023-12-02 17:10:14,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189586 to 189432. [2023-12-02 17:10:15,012 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 17:10:15,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189432 states to 189432 states and 206609 transitions. [2023-12-02 17:10:15,313 INFO L78 Accepts]: Start accepts. Automaton has 189432 states and 206609 transitions. Word has length 708 [2023-12-02 17:10:15,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:10:15,314 INFO L495 AbstractCegarLoop]: Abstraction has 189432 states and 206609 transitions. [2023-12-02 17:10:15,314 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 17:10:15,314 INFO L276 IsEmpty]: Start isEmpty. Operand 189432 states and 206609 transitions. [2023-12-02 17:10:15,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 714 [2023-12-02 17:10:15,338 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:10:15,338 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 17:10:15,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-12-02 17:10:15,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-12-02 17:10:15,539 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 17:10:15,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:10:15,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1076554911, now seen corresponding path program 25 times [2023-12-02 17:10:15,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:10:15,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865513490] [2023-12-02 17:10:15,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:10:15,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:10:15,561 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:10:15,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696298679] [2023-12-02 17:10:15,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:10:15,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:10:15,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:10:15,562 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:10:15,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-12-02 17:10:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:10:15,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 1109 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-02 17:10:15,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:10:17,189 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 17:10:17,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:10:18,604 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 17:10:18,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:10:18,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865513490] [2023-12-02 17:10:18,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:10:18,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696298679] [2023-12-02 17:10:18,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696298679] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:10:18,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [432761945] [2023-12-02 17:10:18,606 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:10:18,606 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:10:18,606 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:10:18,606 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:10:18,606 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:10:19,954 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:10:19,971 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:10:19,989 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:10:28,892 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 17:10:28,893 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:10:28,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:10:28,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 61 [2023-12-02 17:10:28,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505739215] [2023-12-02 17:10:28,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:10:28,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-12-02 17:10:28,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:10:28,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-12-02 17:10:28,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=976, Invalid=5996, Unknown=0, NotChecked=0, Total=6972 [2023-12-02 17:10:28,897 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 17:11:00,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:11:00,071 INFO L93 Difference]: Finished difference Result 349367 states and 382720 transitions. [2023-12-02 17:11:00,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-02 17:11:00,072 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 17:11:00,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:11:00,466 INFO L225 Difference]: With dead ends: 349367 [2023-12-02 17:11:00,466 INFO L226 Difference]: Without dead ends: 271972 [2023-12-02 17:11:00,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2157 GetRequests, 1954 SyntacticMatches, 101 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13642 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1626, Invalid=9086, Unknown=0, NotChecked=0, Total=10712 [2023-12-02 17:11:00,536 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 88 mSDsluCounter, 2859 mSDsCounter, 0 mSdLazyCounter, 5679 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s 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, 2.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:11:00,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 3193 Invalid, 5681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5679 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-12-02 17:11:00,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271972 states. [2023-12-02 17:11:26,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271972 to 222301. [2023-12-02 17:11:26,412 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 17:11:26,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222301 states to 222301 states and 241606 transitions. [2023-12-02 17:11:26,953 INFO L78 Accepts]: Start accepts. Automaton has 222301 states and 241606 transitions. Word has length 713 [2023-12-02 17:11:26,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:11:26,954 INFO L495 AbstractCegarLoop]: Abstraction has 222301 states and 241606 transitions. [2023-12-02 17:11:26,954 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 17:11:26,954 INFO L276 IsEmpty]: Start isEmpty. Operand 222301 states and 241606 transitions. [2023-12-02 17:11:26,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 714 [2023-12-02 17:11:26,975 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:11:26,975 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 17:11:26,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-12-02 17:11:27,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:11:27,176 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 17:11:27,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:11:27,177 INFO L85 PathProgramCache]: Analyzing trace with hash 2042293931, now seen corresponding path program 26 times [2023-12-02 17:11:27,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:11:27,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688760307] [2023-12-02 17:11:27,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:11:27,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:11:27,198 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:11:27,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372419503] [2023-12-02 17:11:27,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:11:27,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:11:27,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:11:27,200 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:11:27,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-12-02 17:11:27,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2023-12-02 17:11:27,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:11:27,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 17:11:27,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:11:27,603 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 17:11:27,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:11:27,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:11:27,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688760307] [2023-12-02 17:11:27,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:11:27,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372419503] [2023-12-02 17:11:27,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372419503] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:11:27,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [918055804] [2023-12-02 17:11:27,925 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:11:27,925 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:11:27,925 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:11:27,925 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:11:27,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:11:28,885 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:11:28,903 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:11:28,935 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:11:37,006 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 17:11:37,006 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:11:37,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:11:37,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-12-02 17:11:37,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783941161] [2023-12-02 17:11:37,007 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:11:37,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 17:11:37,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:11:37,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 17:11:37,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1653, Unknown=0, NotChecked=0, Total=1806 [2023-12-02 17:11:37,008 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 17:12:03,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:12:03,763 INFO L93 Difference]: Finished difference Result 385072 states and 418871 transitions. [2023-12-02 17:12:03,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-02 17:12:03,764 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 17:12:03,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:12:04,062 INFO L225 Difference]: With dead ends: 385072 [2023-12-02 17:12:04,062 INFO L226 Difference]: Without dead ends: 222308 [2023-12-02 17:12:04,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1450 GetRequests, 1315 SyntacticMatches, 81 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2597 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=241, Invalid=2839, Unknown=0, NotChecked=0, Total=3080 [2023-12-02 17:12:04,124 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 237 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 3650 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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 17:12:04,124 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 17:12:04,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222308 states. [2023-12-02 17:12:26,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222308 to 222301. [2023-12-02 17:12:26,621 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 17:12:26,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222301 states to 222301 states and 241491 transitions. [2023-12-02 17:12:26,954 INFO L78 Accepts]: Start accepts. Automaton has 222301 states and 241491 transitions. Word has length 713 [2023-12-02 17:12:26,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:12:26,954 INFO L495 AbstractCegarLoop]: Abstraction has 222301 states and 241491 transitions. [2023-12-02 17:12:26,954 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 17:12:26,954 INFO L276 IsEmpty]: Start isEmpty. Operand 222301 states and 241491 transitions. [2023-12-02 17:12:26,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2023-12-02 17:12:26,979 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:12:26,980 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 17:12:26,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-12-02 17:12:27,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:12:27,180 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 17:12:27,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:12:27,181 INFO L85 PathProgramCache]: Analyzing trace with hash -685247287, now seen corresponding path program 27 times [2023-12-02 17:12:27,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:12:27,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722156534] [2023-12-02 17:12:27,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:12:27,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:12:27,201 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:12:27,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191334929] [2023-12-02 17:12:27,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:12:27,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:12:27,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:12:27,203 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:12:27,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091d17e2-f72a-42c6-89e8-caa76d751bb0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-12-02 17:12:27,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:12:27,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:12:27,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-02 17:12:27,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:12:29,000 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 17:12:29,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:12:29,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:12:29,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722156534] [2023-12-02 17:12:29,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:12:29,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191334929] [2023-12-02 17:12:29,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191334929] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:12:29,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1222135774] [2023-12-02 17:12:29,136 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:12:29,136 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:12:29,136 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:12:29,137 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:12:29,137 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:12:30,376 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:12:30,387 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:12:30,405 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:12:39,009 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 17:12:39,009 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:12:39,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:12:39,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-12-02 17:12:39,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627832823] [2023-12-02 17:12:39,010 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:12:39,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 17:12:39,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:12:39,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 17:12:39,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2286, Unknown=0, NotChecked=0, Total=2450 [2023-12-02 17:12:39,012 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)