./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/array_mul_init.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/array_mul_init.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 09dc663f7f76eee13b6af61297831e3fbddcb16c16389bf8d94f2d27048733d0 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:05:14,676 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:05:14,762 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-25 00:05:14,768 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:05:14,769 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:05:14,809 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:05:14,813 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:05:14,814 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:05:14,815 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:05:14,820 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:05:14,821 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:05:14,822 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:05:14,822 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:05:14,824 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:05:14,825 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:05:14,825 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:05:14,825 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:05:14,826 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:05:14,826 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:05:14,827 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:05:14,827 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:05:14,828 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:05:14,829 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:05:14,830 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:05:14,830 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:05:14,831 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:05:14,831 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:05:14,832 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:05:14,832 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:05:14,832 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:05:14,834 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:05:14,834 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:05:14,835 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:05:14,835 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:05:14,835 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:05:14,835 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:05:14,836 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:05:14,836 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:05:14,837 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:05:14,837 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:05:14,837 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:05:14,838 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:05:14,838 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:05:14,838 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:05:14,839 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:05:14,839 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:05:14,839 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:05:14,840 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_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 09dc663f7f76eee13b6af61297831e3fbddcb16c16389bf8d94f2d27048733d0 [2023-11-25 00:05:15,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:05:15,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:05:15,154 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:05:15,156 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:05:15,157 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:05:15,159 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/array-industry-pattern/array_mul_init.i [2023-11-25 00:05:18,469 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:05:18,812 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:05:18,812 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/sv-benchmarks/c/array-industry-pattern/array_mul_init.i [2023-11-25 00:05:18,821 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/data/b9a322886/5793f47dfbb8486ba270ebeee7b267f3/FLAG0d815f0f2 [2023-11-25 00:05:18,838 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/data/b9a322886/5793f47dfbb8486ba270ebeee7b267f3 [2023-11-25 00:05:18,846 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:05:18,849 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:05:18,853 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:05:18,853 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:05:18,859 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:05:18,860 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:05:18" (1/1) ... [2023-11-25 00:05:18,861 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dc7568e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:18, skipping insertion in model container [2023-11-25 00:05:18,861 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:05:18" (1/1) ... [2023-11-25 00:05:18,889 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:05:19,075 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/sv-benchmarks/c/array-industry-pattern/array_mul_init.i[807,820] [2023-11-25 00:05:19,092 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:05:19,101 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:05:19,114 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/sv-benchmarks/c/array-industry-pattern/array_mul_init.i[807,820] [2023-11-25 00:05:19,125 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:05:19,140 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:05:19,140 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:19 WrapperNode [2023-11-25 00:05:19,141 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:05:19,142 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:05:19,142 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:05:19,142 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:05:19,150 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:19" (1/1) ... [2023-11-25 00:05:19,157 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:19" (1/1) ... [2023-11-25 00:05:19,175 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 73 [2023-11-25 00:05:19,175 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:05:19,176 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:05:19,176 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:05:19,176 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:05:19,185 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:19" (1/1) ... [2023-11-25 00:05:19,186 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:19" (1/1) ... [2023-11-25 00:05:19,188 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:19" (1/1) ... [2023-11-25 00:05:19,188 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:19" (1/1) ... [2023-11-25 00:05:19,195 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:19" (1/1) ... [2023-11-25 00:05:19,199 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:19" (1/1) ... [2023-11-25 00:05:19,200 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:19" (1/1) ... [2023-11-25 00:05:19,201 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:19" (1/1) ... [2023-11-25 00:05:19,204 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:05:19,205 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:05:19,205 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:05:19,205 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:05:19,206 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:19" (1/1) ... [2023-11-25 00:05:19,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:05:19,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:05:19,244 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:05:19,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:05:19,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:05:19,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:05:19,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-25 00:05:19,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-25 00:05:19,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:05:19,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:05:19,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-25 00:05:19,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-25 00:05:19,353 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:05:19,360 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:05:19,527 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:05:19,608 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:05:19,608 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-25 00:05:19,610 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:05:19 BoogieIcfgContainer [2023-11-25 00:05:19,610 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:05:19,614 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:05:19,614 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:05:19,618 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:05:19,619 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:05:18" (1/3) ... [2023-11-25 00:05:19,620 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af698b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:05:19, skipping insertion in model container [2023-11-25 00:05:19,620 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:19" (2/3) ... [2023-11-25 00:05:19,620 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af698b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:05:19, skipping insertion in model container [2023-11-25 00:05:19,621 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:05:19" (3/3) ... [2023-11-25 00:05:19,622 INFO L112 eAbstractionObserver]: Analyzing ICFG array_mul_init.i [2023-11-25 00:05:19,645 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:05:19,645 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:05:19,689 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:05:19,697 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;@644c34e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:05:19,697 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:05:19,702 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:19,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-25 00:05:19,709 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:19,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-25 00:05:19,710 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:19,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:19,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1273479732, now seen corresponding path program 1 times [2023-11-25 00:05:19,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:19,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791133298] [2023-11-25 00:05:19,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:19,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:19,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:19,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791133298] [2023-11-25 00:05:19,890 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-25 00:05:19,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190997558] [2023-11-25 00:05:19,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:19,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:05:19,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:05:19,895 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:05:19,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:05:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:19,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:05:19,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:05:20,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:05:20,044 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:05:20,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190997558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:05:20,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:05:20,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:05:20,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017820732] [2023-11-25 00:05:20,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:05:20,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:05:20,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:20,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:05:20,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:05:20,089 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:20,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:05:20,167 INFO L93 Difference]: Finished difference Result 23 states and 32 transitions. [2023-11-25 00:05:20,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:05:20,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-25 00:05:20,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:05:20,178 INFO L225 Difference]: With dead ends: 23 [2023-11-25 00:05:20,179 INFO L226 Difference]: Without dead ends: 15 [2023-11-25 00:05:20,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:05:20,186 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:05:20,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:05:20,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-25 00:05:20,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2023-11-25 00:05:20,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:20,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2023-11-25 00:05:20,218 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2023-11-25 00:05:20,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:05:20,219 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2023-11-25 00:05:20,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:20,219 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2023-11-25 00:05:20,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-25 00:05:20,220 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:20,220 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:05:20,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-25 00:05:20,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-25 00:05:20,426 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:20,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:20,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1672095219, now seen corresponding path program 1 times [2023-11-25 00:05:20,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:20,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612782087] [2023-11-25 00:05:20,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:20,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:20,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:20,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612782087] [2023-11-25 00:05:20,492 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-25 00:05:20,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226616340] [2023-11-25 00:05:20,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:20,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:05:20,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:05:20,504 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:05:20,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:05:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:20,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-25 00:05:20,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:05:20,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-25 00:05:20,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:05:20,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-25 00:05:20,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226616340] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:05:20,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [260289084] [2023-11-25 00:05:20,733 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-25 00:05:20,734 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:05:20,738 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:05:20,745 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:05:20,746 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:05:21,635 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:05:21,959 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '124#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 0) |ULTIMATE.start_main_#t~mem7#1|) (not (= (* |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) |ULTIMATE.start_main_#t~mem10#1|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (not |ULTIMATE.start_main_#t~short11#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 0) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)))' at error location [2023-11-25 00:05:21,960 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:05:21,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:05:21,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-25 00:05:21,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502893121] [2023-11-25 00:05:21,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:05:21,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:05:21,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:21,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:05:21,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2023-11-25 00:05:21,965 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:22,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:05:22,058 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2023-11-25 00:05:22,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:05:22,059 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-25 00:05:22,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:05:22,061 INFO L225 Difference]: With dead ends: 39 [2023-11-25 00:05:22,061 INFO L226 Difference]: Without dead ends: 32 [2023-11-25 00:05:22,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2023-11-25 00:05:22,065 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:05:22,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 12 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:05:22,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-25 00:05:22,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 16. [2023-11-25 00:05:22,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:22,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2023-11-25 00:05:22,082 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2023-11-25 00:05:22,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:05:22,083 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2023-11-25 00:05:22,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:22,084 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-11-25 00:05:22,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-25 00:05:22,086 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:22,086 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2023-11-25 00:05:22,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-25 00:05:22,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:05:22,292 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:22,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:22,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1544259572, now seen corresponding path program 2 times [2023-11-25 00:05:22,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:22,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713025243] [2023-11-25 00:05:22,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:22,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:22,350 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:05:22,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795142787] [2023-11-25 00:05:22,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:05:22,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:05:22,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:05:22,355 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:05:22,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:05:22,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-25 00:05:22,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:05:22,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-25 00:05:22,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:05:22,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-25 00:05:22,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:05:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-25 00:05:22,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:22,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713025243] [2023-11-25 00:05:22,622 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:05:22,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795142787] [2023-11-25 00:05:22,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795142787] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:05:22,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [111320631] [2023-11-25 00:05:22,625 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-25 00:05:22,626 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:05:22,627 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:05:22,627 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:05:22,627 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:05:23,035 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:05:23,291 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '302#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 0) |ULTIMATE.start_main_#t~mem7#1|) (not (= (* |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) |ULTIMATE.start_main_#t~mem10#1|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (not |ULTIMATE.start_main_#t~short11#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 0) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)))' at error location [2023-11-25 00:05:23,291 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:05:23,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:05:23,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-11-25 00:05:23,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655602130] [2023-11-25 00:05:23,292 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:05:23,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-25 00:05:23,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:23,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-25 00:05:23,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=130, Unknown=0, NotChecked=0, Total=240 [2023-11-25 00:05:23,295 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:23,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:05:23,440 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2023-11-25 00:05:23,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-25 00:05:23,441 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-25 00:05:23,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:05:23,442 INFO L225 Difference]: With dead ends: 84 [2023-11-25 00:05:23,443 INFO L226 Difference]: Without dead ends: 74 [2023-11-25 00:05:23,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=130, Unknown=0, NotChecked=0, Total=240 [2023-11-25 00:05:23,445 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 84 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:05:23,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 30 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:05:23,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-25 00:05:23,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 28. [2023-11-25 00:05:23,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:23,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-11-25 00:05:23,453 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2023-11-25 00:05:23,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:05:23,454 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-11-25 00:05:23,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:23,454 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-11-25 00:05:23,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-25 00:05:23,455 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:23,455 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2023-11-25 00:05:23,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-25 00:05:23,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:05:23,661 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:23,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:23,662 INFO L85 PathProgramCache]: Analyzing trace with hash -477129876, now seen corresponding path program 3 times [2023-11-25 00:05:23,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:23,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299885125] [2023-11-25 00:05:23,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:23,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:23,717 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:05:23,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16124828] [2023-11-25 00:05:23,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-25 00:05:23,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:05:23,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:05:23,719 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:05:23,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:05:23,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-25 00:05:23,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:05:23,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-25 00:05:23,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:05:24,006 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-25 00:05:24,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:05:24,247 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-25 00:05:24,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:24,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299885125] [2023-11-25 00:05:24,248 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:05:24,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16124828] [2023-11-25 00:05:24,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16124828] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:05:24,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [672927037] [2023-11-25 00:05:24,251 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-25 00:05:24,251 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:05:24,251 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:05:24,251 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:05:24,251 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:05:24,540 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:05:24,937 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '654#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 0) |ULTIMATE.start_main_#t~mem7#1|) (not (= (* |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) |ULTIMATE.start_main_#t~mem10#1|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (not |ULTIMATE.start_main_#t~short11#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 0) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)))' at error location [2023-11-25 00:05:24,937 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:05:24,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:05:24,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2023-11-25 00:05:24,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668714099] [2023-11-25 00:05:24,938 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:05:24,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-25 00:05:24,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:24,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-25 00:05:24,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=400, Unknown=0, NotChecked=0, Total=756 [2023-11-25 00:05:24,940 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:25,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:05:25,250 INFO L93 Difference]: Finished difference Result 174 states and 201 transitions. [2023-11-25 00:05:25,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-25 00:05:25,251 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-25 00:05:25,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:05:25,263 INFO L225 Difference]: With dead ends: 174 [2023-11-25 00:05:25,263 INFO L226 Difference]: Without dead ends: 158 [2023-11-25 00:05:25,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=356, Invalid=400, Unknown=0, NotChecked=0, Total=756 [2023-11-25 00:05:25,268 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 228 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:05:25,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 66 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:05:25,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-11-25 00:05:25,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 52. [2023-11-25 00:05:25,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:25,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2023-11-25 00:05:25,288 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 26 [2023-11-25 00:05:25,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:05:25,293 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2023-11-25 00:05:25,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:25,293 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2023-11-25 00:05:25,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-25 00:05:25,295 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:25,295 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2023-11-25 00:05:25,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-25 00:05:25,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:05:25,507 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:25,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:25,507 INFO L85 PathProgramCache]: Analyzing trace with hash 336917036, now seen corresponding path program 4 times [2023-11-25 00:05:25,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:25,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972502478] [2023-11-25 00:05:25,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:25,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:25,643 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:05:25,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2100281746] [2023-11-25 00:05:25,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-25 00:05:25,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:05:25,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:05:25,658 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:05:25,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-25 00:05:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:25,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-25 00:05:25,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:05:26,292 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-11-25 00:05:26,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:05:27,240 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-11-25 00:05:27,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:27,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972502478] [2023-11-25 00:05:27,241 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:05:27,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100281746] [2023-11-25 00:05:27,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100281746] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:05:27,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [353490908] [2023-11-25 00:05:27,243 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-25 00:05:27,244 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:05:27,244 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:05:27,244 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:05:27,244 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:05:27,552 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:05:28,381 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1354#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 0) |ULTIMATE.start_main_#t~mem7#1|) (not (= (* |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) |ULTIMATE.start_main_#t~mem10#1|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (not |ULTIMATE.start_main_#t~short11#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 0) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)))' at error location [2023-11-25 00:05:28,381 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:05:28,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:05:28,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2023-11-25 00:05:28,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408878270] [2023-11-25 00:05:28,382 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:05:28,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-25 00:05:28,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:28,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-25 00:05:28,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1280, Invalid=1372, Unknown=0, NotChecked=0, Total=2652 [2023-11-25 00:05:28,386 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:29,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:05:29,365 INFO L93 Difference]: Finished difference Result 354 states and 405 transitions. [2023-11-25 00:05:29,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-25 00:05:29,366 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-11-25 00:05:29,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:05:29,368 INFO L225 Difference]: With dead ends: 354 [2023-11-25 00:05:29,369 INFO L226 Difference]: Without dead ends: 326 [2023-11-25 00:05:29,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 23 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1280, Invalid=1372, Unknown=0, NotChecked=0, Total=2652 [2023-11-25 00:05:29,375 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 684 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:05:29,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 138 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:05:29,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2023-11-25 00:05:29,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 100. [2023-11-25 00:05:29,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:29,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2023-11-25 00:05:29,409 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 50 [2023-11-25 00:05:29,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:05:29,409 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2023-11-25 00:05:29,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:29,410 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2023-11-25 00:05:29,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-25 00:05:29,413 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:29,413 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2023-11-25 00:05:29,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-25 00:05:29,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:05:29,614 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:29,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:29,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1295757396, now seen corresponding path program 5 times [2023-11-25 00:05:29,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:29,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491593570] [2023-11-25 00:05:29,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:29,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:29,825 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:05:29,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [902352272] [2023-11-25 00:05:29,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:05:29,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:05:29,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:05:29,831 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:05:29,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ec42d-8bb5-4d48-a4d3-72be95d1ecee/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process