./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 30e01a73 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_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire --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 052aa366c05075bf32d0b6fa176a2f7194f524315c85e0eaee7e4a343f477db5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:24:19,652 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:24:19,733 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-23 21:24:19,739 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:24:19,739 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:24:19,772 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:24:19,773 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:24:19,773 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:24:19,774 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:24:19,775 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:24:19,775 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:24:19,776 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:24:19,776 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:24:19,777 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:24:19,778 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:24:19,778 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:24:19,779 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:24:19,779 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:24:19,780 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:24:19,781 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:24:19,781 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:24:19,782 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:24:19,783 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:24:19,784 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:24:19,784 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:24:19,785 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:24:19,785 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:24:19,786 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:24:19,787 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:24:19,787 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:24:19,788 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:24:19,788 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-23 21:24:19,789 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:24:19,789 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:24:19,790 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:24:19,790 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:24:19,791 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:24:19,791 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:24:19,791 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:24:19,792 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:24:19,792 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:24:19,793 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:24:19,793 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:24:19,794 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:24:19,794 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:24:19,795 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:24:19,795 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:24:19,795 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:24:19,796 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:24:19,796 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_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 052aa366c05075bf32d0b6fa176a2f7194f524315c85e0eaee7e4a343f477db5 [2023-11-23 21:24:20,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:24:20,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:24:20,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:24:20,176 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:24:20,177 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:24:20,178 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound100.c [2023-11-23 21:24:23,343 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:24:23,539 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:24:23,540 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound100.c [2023-11-23 21:24:23,548 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/data/8f726cdf0/5d716b6a7ba7471e993e91e999482891/FLAG34ffca469 [2023-11-23 21:24:23,564 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/data/8f726cdf0/5d716b6a7ba7471e993e91e999482891 [2023-11-23 21:24:23,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:24:23,569 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:24:23,570 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:24:23,571 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:24:23,576 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:24:23,577 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:24:23" (1/1) ... [2023-11-23 21:24:23,578 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76ba760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:23, skipping insertion in model container [2023-11-23 21:24:23,579 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:24:23" (1/1) ... [2023-11-23 21:24:23,602 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:24:23,843 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:24:23,853 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:24:23,878 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:24:23,893 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:24:23,893 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:23 WrapperNode [2023-11-23 21:24:23,893 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:24:23,895 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:24:23,895 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:24:23,895 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:24:23,901 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:23" (1/1) ... [2023-11-23 21:24:23,909 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:23" (1/1) ... [2023-11-23 21:24:23,935 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 119 [2023-11-23 21:24:23,936 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:24:23,936 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:24:23,936 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:24:23,937 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:24:23,947 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:23" (1/1) ... [2023-11-23 21:24:23,947 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:23" (1/1) ... [2023-11-23 21:24:23,949 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:23" (1/1) ... [2023-11-23 21:24:23,949 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:23" (1/1) ... [2023-11-23 21:24:23,958 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:23" (1/1) ... [2023-11-23 21:24:23,962 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:23" (1/1) ... [2023-11-23 21:24:23,969 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:23" (1/1) ... [2023-11-23 21:24:23,970 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:23" (1/1) ... [2023-11-23 21:24:23,972 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:24:23,973 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:24:23,974 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:24:23,974 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:24:23,975 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:23" (1/1) ... [2023-11-23 21:24:23,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:24:23,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:24,012 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:24:24,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:24:24,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:24:24,057 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:24:24,057 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:24:24,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:24:24,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:24:24,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:24:24,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 21:24:24,058 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 21:24:24,130 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:24:24,132 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:24:24,567 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:24:24,607 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:24:24,607 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:24:24,609 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:24:24 BoogieIcfgContainer [2023-11-23 21:24:24,609 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:24:24,612 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:24:24,612 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:24:24,616 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:24:24,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:24:23" (1/3) ... [2023-11-23 21:24:24,617 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be30f6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:24:24, skipping insertion in model container [2023-11-23 21:24:24,618 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:23" (2/3) ... [2023-11-23 21:24:24,618 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be30f6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:24:24, skipping insertion in model container [2023-11-23 21:24:24,618 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:24:24" (3/3) ... [2023-11-23 21:24:24,620 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound100.c [2023-11-23 21:24:24,641 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:24:24,641 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 56 error locations. [2023-11-23 21:24:24,698 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:24:24,705 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;@6ad93b04, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:24:24,706 INFO L358 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2023-11-23 21:24:24,711 INFO L276 IsEmpty]: Start isEmpty. Operand has 135 states, 65 states have (on average 1.9076923076923078) internal successors, (124), 121 states have internal predecessors, (124), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-23 21:24:24,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 21:24:24,720 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:24,720 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:24:24,721 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr30ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-23 21:24:24,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:24,726 INFO L85 PathProgramCache]: Analyzing trace with hash 91879193, now seen corresponding path program 1 times [2023-11-23 21:24:24,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:24,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960161937] [2023-11-23 21:24:24,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:24,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:24:24,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:24,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960161937] [2023-11-23 21:24:24,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960161937] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:24,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:24,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:24:24,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914696037] [2023-11-23 21:24:24,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:24,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 21:24:24,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:24,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 21:24:24,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:24:24,945 INFO L87 Difference]: Start difference. First operand has 135 states, 65 states have (on average 1.9076923076923078) internal successors, (124), 121 states have internal predecessors, (124), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 21:24:24,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:24,997 INFO L93 Difference]: Finished difference Result 195 states and 208 transitions. [2023-11-23 21:24:24,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 21:24:25,000 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 17 [2023-11-23 21:24:25,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:25,009 INFO L225 Difference]: With dead ends: 195 [2023-11-23 21:24:25,010 INFO L226 Difference]: Without dead ends: 132 [2023-11-23 21:24:25,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:24:25,024 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:25,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 141 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:24:25,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-23 21:24:25,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-11-23 21:24:25,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 64 states have (on average 1.890625) internal successors, (121), 119 states have internal predecessors, (121), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-23 21:24:25,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 141 transitions. [2023-11-23 21:24:25,079 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 141 transitions. Word has length 17 [2023-11-23 21:24:25,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:25,081 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 141 transitions. [2023-11-23 21:24:25,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 21:24:25,081 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 141 transitions. [2023-11-23 21:24:25,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 21:24:25,083 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:25,083 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:24:25,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:24:25,092 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-23 21:24:25,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:25,093 INFO L85 PathProgramCache]: Analyzing trace with hash 91873195, now seen corresponding path program 1 times [2023-11-23 21:24:25,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:25,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450386044] [2023-11-23 21:24:25,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:25,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:25,132 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:24:25,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [816167390] [2023-11-23 21:24:25,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:25,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:25,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:25,140 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:25,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:24:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:25,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:24:25,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:24:25,312 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:25,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:25,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450386044] [2023-11-23 21:24:25,313 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:24:25,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816167390] [2023-11-23 21:24:25,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816167390] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:25,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:25,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:24:25,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622542666] [2023-11-23 21:24:25,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:25,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:24:25,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:25,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:24:25,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:24:25,318 INFO L87 Difference]: Start difference. First operand 132 states and 141 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 21:24:25,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:25,595 INFO L93 Difference]: Finished difference Result 249 states and 265 transitions. [2023-11-23 21:24:25,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:24:25,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 17 [2023-11-23 21:24:25,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:25,605 INFO L225 Difference]: With dead ends: 249 [2023-11-23 21:24:25,610 INFO L226 Difference]: Without dead ends: 245 [2023-11-23 21:24:25,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:24:25,613 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 105 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:25,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 133 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:24:25,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2023-11-23 21:24:25,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 171. [2023-11-23 21:24:25,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 98 states have (on average 1.8775510204081634) internal successors, (184), 153 states have internal predecessors, (184), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-23 21:24:25,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 214 transitions. [2023-11-23 21:24:25,667 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 214 transitions. Word has length 17 [2023-11-23 21:24:25,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:25,668 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 214 transitions. [2023-11-23 21:24:25,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 21:24:25,669 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 214 transitions. [2023-11-23 21:24:25,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:24:25,670 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:25,670 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:24:25,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:25,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:25,888 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-23 21:24:25,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:25,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1904171187, now seen corresponding path program 1 times [2023-11-23 21:24:25,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:25,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377473534] [2023-11-23 21:24:25,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:25,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:25,917 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:24:25,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1438768148] [2023-11-23 21:24:25,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:25,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:25,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:25,919 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:25,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:24:25,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:25,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:24:25,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:26,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:24:26,009 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:26,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:26,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377473534] [2023-11-23 21:24:26,011 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:24:26,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438768148] [2023-11-23 21:24:26,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438768148] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:26,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:26,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:24:26,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786595917] [2023-11-23 21:24:26,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:26,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:24:26,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:26,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:24:26,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:24:26,020 INFO L87 Difference]: Start difference. First operand 171 states and 214 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 21:24:26,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:26,261 INFO L93 Difference]: Finished difference Result 288 states and 338 transitions. [2023-11-23 21:24:26,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:24:26,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 19 [2023-11-23 21:24:26,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:26,278 INFO L225 Difference]: With dead ends: 288 [2023-11-23 21:24:26,278 INFO L226 Difference]: Without dead ends: 280 [2023-11-23 21:24:26,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:24:26,281 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 100 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:26,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 191 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:24:26,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2023-11-23 21:24:26,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 224. [2023-11-23 21:24:26,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 145 states have (on average 1.813793103448276) internal successors, (263), 200 states have internal predecessors, (263), 21 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-23 21:24:26,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 305 transitions. [2023-11-23 21:24:26,342 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 305 transitions. Word has length 19 [2023-11-23 21:24:26,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:26,342 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 305 transitions. [2023-11-23 21:24:26,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 21:24:26,343 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 305 transitions. [2023-11-23 21:24:26,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 21:24:26,344 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:26,344 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:24:26,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:26,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:26,564 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-23 21:24:26,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:26,565 INFO L85 PathProgramCache]: Analyzing trace with hash -252440849, now seen corresponding path program 1 times [2023-11-23 21:24:26,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:26,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203288316] [2023-11-23 21:24:26,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:26,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:26,590 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:24:26,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [417313585] [2023-11-23 21:24:26,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:26,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:26,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:26,600 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:26,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:24:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:26,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:24:26,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:24:26,771 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:26,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:26,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203288316] [2023-11-23 21:24:26,772 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:24:26,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417313585] [2023-11-23 21:24:26,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417313585] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:26,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:26,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:24:26,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795310407] [2023-11-23 21:24:26,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:26,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:24:26,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:26,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:24:26,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:24:26,778 INFO L87 Difference]: Start difference. First operand 224 states and 305 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 21:24:27,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:27,050 INFO L93 Difference]: Finished difference Result 280 states and 324 transitions. [2023-11-23 21:24:27,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:24:27,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 21 [2023-11-23 21:24:27,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:27,053 INFO L225 Difference]: With dead ends: 280 [2023-11-23 21:24:27,053 INFO L226 Difference]: Without dead ends: 266 [2023-11-23 21:24:27,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:24:27,055 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 83 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:27,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 119 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:24:27,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-11-23 21:24:27,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 189. [2023-11-23 21:24:27,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 115 states have (on average 1.7391304347826086) internal successors, (200), 170 states have internal predecessors, (200), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-23 21:24:27,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 232 transitions. [2023-11-23 21:24:27,073 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 232 transitions. Word has length 21 [2023-11-23 21:24:27,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:27,074 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 232 transitions. [2023-11-23 21:24:27,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 21:24:27,074 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 232 transitions. [2023-11-23 21:24:27,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-23 21:24:27,077 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:27,077 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:24:27,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:27,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:27,296 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-23 21:24:27,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:27,297 INFO L85 PathProgramCache]: Analyzing trace with hash 115258569, now seen corresponding path program 1 times [2023-11-23 21:24:27,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:27,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834074490] [2023-11-23 21:24:27,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:27,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:27,313 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:24:27,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448203072] [2023-11-23 21:24:27,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:27,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:27,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:27,316 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:27,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:24:27,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:27,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:24:27,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:27,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:24:27,403 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:27,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:27,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834074490] [2023-11-23 21:24:27,404 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:24:27,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448203072] [2023-11-23 21:24:27,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448203072] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:27,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:27,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:24:27,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232315164] [2023-11-23 21:24:27,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:27,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:24:27,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:27,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:24:27,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:24:27,414 INFO L87 Difference]: Start difference. First operand 189 states and 232 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:24:27,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:27,546 INFO L93 Difference]: Finished difference Result 367 states and 451 transitions. [2023-11-23 21:24:27,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:24:27,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 26 [2023-11-23 21:24:27,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:27,555 INFO L225 Difference]: With dead ends: 367 [2023-11-23 21:24:27,555 INFO L226 Difference]: Without dead ends: 359 [2023-11-23 21:24:27,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:24:27,559 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 100 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:27,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 187 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:24:27,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-11-23 21:24:27,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 268. [2023-11-23 21:24:27,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 185 states have (on average 1.7081081081081082) internal successors, (316), 240 states have internal predecessors, (316), 25 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-23 21:24:27,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 366 transitions. [2023-11-23 21:24:27,599 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 366 transitions. Word has length 26 [2023-11-23 21:24:27,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:27,600 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 366 transitions. [2023-11-23 21:24:27,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:24:27,600 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 366 transitions. [2023-11-23 21:24:27,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 21:24:27,601 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:27,601 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:24:27,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:27,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:27,828 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-23 21:24:27,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:27,829 INFO L85 PathProgramCache]: Analyzing trace with hash -905662837, now seen corresponding path program 1 times [2023-11-23 21:24:27,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:27,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199447586] [2023-11-23 21:24:27,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:27,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:27,845 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:24:27,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043702789] [2023-11-23 21:24:27,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:27,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:27,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:27,846 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:27,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:24:27,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:27,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:24:27,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:24:28,051 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:28,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:28,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199447586] [2023-11-23 21:24:28,052 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:24:28,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043702789] [2023-11-23 21:24:28,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043702789] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:28,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:28,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:24:28,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536486913] [2023-11-23 21:24:28,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:28,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:24:28,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:28,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:24:28,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:24:28,055 INFO L87 Difference]: Start difference. First operand 268 states and 366 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:24:28,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:28,607 INFO L93 Difference]: Finished difference Result 353 states and 431 transitions. [2023-11-23 21:24:28,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:24:28,608 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2023-11-23 21:24:28,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:28,611 INFO L225 Difference]: With dead ends: 353 [2023-11-23 21:24:28,611 INFO L226 Difference]: Without dead ends: 351 [2023-11-23 21:24:28,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:24:28,612 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 301 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:28,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 130 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:24:28,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2023-11-23 21:24:28,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 268. [2023-11-23 21:24:28,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 185 states have (on average 1.6864864864864866) internal successors, (312), 240 states have internal predecessors, (312), 25 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-23 21:24:28,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 362 transitions. [2023-11-23 21:24:28,672 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 362 transitions. Word has length 28 [2023-11-23 21:24:28,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:28,673 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 362 transitions. [2023-11-23 21:24:28,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:24:28,673 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 362 transitions. [2023-11-23 21:24:28,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-23 21:24:28,674 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:28,674 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:24:28,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:28,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 21:24:28,896 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-23 21:24:28,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:28,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1989223193, now seen corresponding path program 1 times [2023-11-23 21:24:28,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:28,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559086452] [2023-11-23 21:24:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:28,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:28,929 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:24:28,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326355162] [2023-11-23 21:24:28,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:28,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:28,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:28,931 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:28,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:24:28,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:28,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:24:28,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:29,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:24:29,108 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:29,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:29,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559086452] [2023-11-23 21:24:29,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:24:29,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326355162] [2023-11-23 21:24:29,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326355162] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:29,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:29,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:24:29,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373148585] [2023-11-23 21:24:29,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:29,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:24:29,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:29,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:24:29,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:24:29,111 INFO L87 Difference]: Start difference. First operand 268 states and 362 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:24:29,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:29,551 INFO L93 Difference]: Finished difference Result 351 states and 427 transitions. [2023-11-23 21:24:29,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:24:29,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2023-11-23 21:24:29,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:29,555 INFO L225 Difference]: With dead ends: 351 [2023-11-23 21:24:29,555 INFO L226 Difference]: Without dead ends: 349 [2023-11-23 21:24:29,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:24:29,557 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 295 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:29,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 130 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:24:29,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2023-11-23 21:24:29,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 268. [2023-11-23 21:24:29,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 185 states have (on average 1.664864864864865) internal successors, (308), 240 states have internal predecessors, (308), 25 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-23 21:24:29,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 358 transitions. [2023-11-23 21:24:29,587 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 358 transitions. Word has length 29 [2023-11-23 21:24:29,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:29,587 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 358 transitions. [2023-11-23 21:24:29,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:24:29,588 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 358 transitions. [2023-11-23 21:24:29,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-23 21:24:29,589 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:29,589 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:24:29,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:29,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 21:24:29,808 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-23 21:24:29,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:29,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1536376909, now seen corresponding path program 1 times [2023-11-23 21:24:29,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:29,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417206444] [2023-11-23 21:24:29,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:29,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:29,824 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:24:29,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1853670408] [2023-11-23 21:24:29,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:29,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:29,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:29,825 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:29,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 21:24:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:29,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:24:29,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:29,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:24:29,933 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:29,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:29,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417206444] [2023-11-23 21:24:29,933 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:24:29,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853670408] [2023-11-23 21:24:29,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853670408] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:29,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:29,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:24:29,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315986235] [2023-11-23 21:24:29,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:29,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:24:29,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:29,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:24:29,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:24:29,935 INFO L87 Difference]: Start difference. First operand 268 states and 358 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:24:30,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:30,160 INFO L93 Difference]: Finished difference Result 355 states and 431 transitions. [2023-11-23 21:24:30,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:24:30,160 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 30 [2023-11-23 21:24:30,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:30,163 INFO L225 Difference]: With dead ends: 355 [2023-11-23 21:24:30,163 INFO L226 Difference]: Without dead ends: 353 [2023-11-23 21:24:30,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:24:30,164 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 185 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:30,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 158 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:24:30,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2023-11-23 21:24:30,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 269. [2023-11-23 21:24:30,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 186 states have (on average 1.6451612903225807) internal successors, (306), 241 states have internal predecessors, (306), 25 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-23 21:24:30,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 356 transitions. [2023-11-23 21:24:30,185 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 356 transitions. Word has length 30 [2023-11-23 21:24:30,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:30,185 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 356 transitions. [2023-11-23 21:24:30,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:24:30,185 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 356 transitions. [2023-11-23 21:24:30,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-23 21:24:30,186 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:30,187 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:24:30,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:30,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:30,408 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-23 21:24:30,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:30,410 INFO L85 PathProgramCache]: Analyzing trace with hash 383043995, now seen corresponding path program 1 times [2023-11-23 21:24:30,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:30,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712585137] [2023-11-23 21:24:30,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:30,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:30,440 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:24:30,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1866381212] [2023-11-23 21:24:30,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:30,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:30,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:30,452 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:30,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 21:24:30,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:30,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:24:30,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:30,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:24:30,566 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:30,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:30,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712585137] [2023-11-23 21:24:30,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:24:30,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866381212] [2023-11-23 21:24:30,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866381212] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:30,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:30,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:24:30,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763317145] [2023-11-23 21:24:30,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:30,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:24:30,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:30,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:24:30,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:24:30,573 INFO L87 Difference]: Start difference. First operand 269 states and 356 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:24:30,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:30,791 INFO L93 Difference]: Finished difference Result 353 states and 427 transitions. [2023-11-23 21:24:30,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:24:30,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2023-11-23 21:24:30,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:30,796 INFO L225 Difference]: With dead ends: 353 [2023-11-23 21:24:30,797 INFO L226 Difference]: Without dead ends: 351 [2023-11-23 21:24:30,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:24:30,800 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 180 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:30,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 161 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:24:30,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2023-11-23 21:24:30,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 270. [2023-11-23 21:24:30,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 187 states have (on average 1.625668449197861) internal successors, (304), 242 states have internal predecessors, (304), 25 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-23 21:24:30,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 354 transitions. [2023-11-23 21:24:30,823 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 354 transitions. Word has length 31 [2023-11-23 21:24:30,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:30,824 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 354 transitions. [2023-11-23 21:24:30,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:24:30,824 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 354 transitions. [2023-11-23 21:24:30,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 21:24:30,825 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:30,825 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:24:30,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:31,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:31,046 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-23 21:24:31,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:31,047 INFO L85 PathProgramCache]: Analyzing trace with hash -270096861, now seen corresponding path program 1 times [2023-11-23 21:24:31,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:31,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203451661] [2023-11-23 21:24:31,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:31,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:31,060 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:24:31,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096173500] [2023-11-23 21:24:31,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:31,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:31,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:31,062 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:31,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 21:24:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:31,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:24:31,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 21:24:31,239 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:31,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:31,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203451661] [2023-11-23 21:24:31,240 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:24:31,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096173500] [2023-11-23 21:24:31,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096173500] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:31,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:31,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:24:31,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48276709] [2023-11-23 21:24:31,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:31,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:24:31,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:31,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:24:31,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:24:31,243 INFO L87 Difference]: Start difference. First operand 270 states and 354 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-23 21:24:31,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:31,890 INFO L93 Difference]: Finished difference Result 314 states and 373 transitions. [2023-11-23 21:24:31,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:24:31,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 37 [2023-11-23 21:24:31,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:31,893 INFO L225 Difference]: With dead ends: 314 [2023-11-23 21:24:31,894 INFO L226 Difference]: Without dead ends: 312 [2023-11-23 21:24:31,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:24:31,895 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 193 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:31,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 151 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:24:31,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2023-11-23 21:24:31,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 271. [2023-11-23 21:24:31,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 188 states have (on average 1.6117021276595744) internal successors, (303), 243 states have internal predecessors, (303), 25 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-23 21:24:31,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 353 transitions. [2023-11-23 21:24:31,915 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 353 transitions. Word has length 37 [2023-11-23 21:24:31,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:31,915 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 353 transitions. [2023-11-23 21:24:31,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-23 21:24:31,916 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 353 transitions. [2023-11-23 21:24:31,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-23 21:24:31,916 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:31,916 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:24:31,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:32,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 21:24:32,137 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-23 21:24:32,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:32,137 INFO L85 PathProgramCache]: Analyzing trace with hash 216931982, now seen corresponding path program 1 times [2023-11-23 21:24:32,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:32,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818039380] [2023-11-23 21:24:32,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:32,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:32,148 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:24:32,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1302642623] [2023-11-23 21:24:32,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:32,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:32,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:32,150 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:32,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 21:24:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:32,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:24:32,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:32,293 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 21:24:32,293 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:32,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:32,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818039380] [2023-11-23 21:24:32,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:24:32,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302642623] [2023-11-23 21:24:32,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302642623] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:32,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:32,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:24:32,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47517449] [2023-11-23 21:24:32,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:32,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:24:32,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:32,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:24:32,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:24:32,297 INFO L87 Difference]: Start difference. First operand 271 states and 353 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-23 21:24:32,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:32,556 INFO L93 Difference]: Finished difference Result 312 states and 370 transitions. [2023-11-23 21:24:32,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:24:32,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2023-11-23 21:24:32,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:32,559 INFO L225 Difference]: With dead ends: 312 [2023-11-23 21:24:32,559 INFO L226 Difference]: Without dead ends: 310 [2023-11-23 21:24:32,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:24:32,560 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 190 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:32,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 151 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:24:32,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2023-11-23 21:24:32,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 272. [2023-11-23 21:24:32,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 189 states have (on average 1.597883597883598) internal successors, (302), 244 states have internal predecessors, (302), 25 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-23 21:24:32,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 352 transitions. [2023-11-23 21:24:32,581 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 352 transitions. Word has length 38 [2023-11-23 21:24:32,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:32,581 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 352 transitions. [2023-11-23 21:24:32,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-23 21:24:32,582 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 352 transitions. [2023-11-23 21:24:32,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 21:24:32,582 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:32,583 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:24:32,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:32,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 21:24:32,796 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-23 21:24:32,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:32,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1865043067, now seen corresponding path program 1 times [2023-11-23 21:24:32,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:32,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136958487] [2023-11-23 21:24:32,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:32,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:32,806 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:24:32,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767239698] [2023-11-23 21:24:32,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:32,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:32,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:32,808 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:32,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 21:24:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:32,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:24:32,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:32,914 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 21:24:32,914 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:32,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:32,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136958487] [2023-11-23 21:24:32,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:24:32,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767239698] [2023-11-23 21:24:32,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767239698] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:32,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:32,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:24:32,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797990377] [2023-11-23 21:24:32,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:32,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:24:32,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:32,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:24:32,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:24:32,919 INFO L87 Difference]: Start difference. First operand 272 states and 352 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 21:24:33,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:33,292 INFO L93 Difference]: Finished difference Result 304 states and 359 transitions. [2023-11-23 21:24:33,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:24:33,293 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2023-11-23 21:24:33,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:33,295 INFO L225 Difference]: With dead ends: 304 [2023-11-23 21:24:33,295 INFO L226 Difference]: Without dead ends: 302 [2023-11-23 21:24:33,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:24:33,296 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 81 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:33,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 230 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:24:33,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2023-11-23 21:24:33,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 273. [2023-11-23 21:24:33,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 190 states have (on average 1.5842105263157895) internal successors, (301), 245 states have internal predecessors, (301), 25 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-23 21:24:33,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 351 transitions. [2023-11-23 21:24:33,317 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 351 transitions. Word has length 39 [2023-11-23 21:24:33,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:33,317 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 351 transitions. [2023-11-23 21:24:33,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 21:24:33,318 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 351 transitions. [2023-11-23 21:24:33,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-23 21:24:33,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:33,318 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:24:33,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:33,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 21:24:33,540 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-23 21:24:33,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:33,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1981760144, now seen corresponding path program 1 times [2023-11-23 21:24:33,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:33,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063989789] [2023-11-23 21:24:33,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:33,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:33,551 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:24:33,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498070107] [2023-11-23 21:24:33,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:33,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:33,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:33,553 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:33,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 21:24:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:33,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:24:33,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 21:24:33,658 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:33,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:33,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063989789] [2023-11-23 21:24:33,659 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:24:33,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498070107] [2023-11-23 21:24:33,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498070107] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:33,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:33,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:24:33,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811896692] [2023-11-23 21:24:33,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:33,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:24:33,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:33,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:24:33,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:24:33,662 INFO L87 Difference]: Start difference. First operand 273 states and 351 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 21:24:33,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:33,992 INFO L93 Difference]: Finished difference Result 302 states and 356 transitions. [2023-11-23 21:24:33,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:24:33,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2023-11-23 21:24:33,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:33,995 INFO L225 Difference]: With dead ends: 302 [2023-11-23 21:24:33,995 INFO L226 Difference]: Without dead ends: 300 [2023-11-23 21:24:33,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:24:33,996 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 79 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:33,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 233 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:24:33,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2023-11-23 21:24:34,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 274. [2023-11-23 21:24:34,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 191 states have (on average 1.5706806282722514) internal successors, (300), 246 states have internal predecessors, (300), 25 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-23 21:24:34,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 350 transitions. [2023-11-23 21:24:34,017 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 350 transitions. Word has length 40 [2023-11-23 21:24:34,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:34,017 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 350 transitions. [2023-11-23 21:24:34,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 21:24:34,018 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 350 transitions. [2023-11-23 21:24:34,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-23 21:24:34,022 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:34,022 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:24:34,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:34,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-23 21:24:34,243 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr30ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-23 21:24:34,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:34,244 INFO L85 PathProgramCache]: Analyzing trace with hash -242503330, now seen corresponding path program 1 times [2023-11-23 21:24:34,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:34,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731983842] [2023-11-23 21:24:34,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:34,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:34,260 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:24:34,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499929450] [2023-11-23 21:24:34,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:34,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:34,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:34,265 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:34,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 21:24:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:34,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:24:34,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 21:24:34,337 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:34,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:34,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731983842] [2023-11-23 21:24:34,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:24:34,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499929450] [2023-11-23 21:24:34,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499929450] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:34,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:34,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:24:34,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653662214] [2023-11-23 21:24:34,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:34,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:24:34,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:34,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:24:34,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:24:34,340 INFO L87 Difference]: Start difference. First operand 274 states and 350 transitions. Second operand has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-23 21:24:34,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:34,388 INFO L93 Difference]: Finished difference Result 274 states and 350 transitions. [2023-11-23 21:24:34,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:24:34,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2023-11-23 21:24:34,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:34,391 INFO L225 Difference]: With dead ends: 274 [2023-11-23 21:24:34,391 INFO L226 Difference]: Without dead ends: 272 [2023-11-23 21:24:34,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:24:34,392 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 52 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:34,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 194 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:24:34,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-11-23 21:24:34,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2023-11-23 21:24:34,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 191 states have (on average 1.5392670157068062) internal successors, (294), 244 states have internal predecessors, (294), 25 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-23 21:24:34,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 344 transitions. [2023-11-23 21:24:34,414 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 344 transitions. Word has length 45 [2023-11-23 21:24:34,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:34,414 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 344 transitions. [2023-11-23 21:24:34,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-23 21:24:34,414 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 344 transitions. [2023-11-23 21:24:34,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-23 21:24:34,415 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:34,415 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:24:34,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:34,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:34,642 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-23 21:24:34,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:34,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1072331490, now seen corresponding path program 1 times [2023-11-23 21:24:34,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:34,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246064355] [2023-11-23 21:24:34,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:34,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:34,653 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:24:34,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925668392] [2023-11-23 21:24:34,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:34,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:34,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:34,655 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:34,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-23 21:24:34,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:34,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:24:34,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:34,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 21:24:34,728 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:34,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:34,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246064355] [2023-11-23 21:24:34,728 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:24:34,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925668392] [2023-11-23 21:24:34,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925668392] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:34,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:34,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:24:34,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771068195] [2023-11-23 21:24:34,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:34,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:24:34,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:34,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:24:34,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:24:34,731 INFO L87 Difference]: Start difference. First operand 272 states and 344 transitions. Second operand has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-23 21:24:34,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:34,777 INFO L93 Difference]: Finished difference Result 272 states and 344 transitions. [2023-11-23 21:24:34,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:24:34,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 46 [2023-11-23 21:24:34,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:34,780 INFO L225 Difference]: With dead ends: 272 [2023-11-23 21:24:34,780 INFO L226 Difference]: Without dead ends: 270 [2023-11-23 21:24:34,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:24:34,781 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 50 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:34,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 193 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:24:34,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2023-11-23 21:24:34,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2023-11-23 21:24:34,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 191 states have (on average 1.4973821989528795) internal successors, (286), 242 states have internal predecessors, (286), 25 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-23 21:24:34,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 336 transitions. [2023-11-23 21:24:34,801 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 336 transitions. Word has length 46 [2023-11-23 21:24:34,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:34,802 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 336 transitions. [2023-11-23 21:24:34,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-23 21:24:34,802 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 336 transitions. [2023-11-23 21:24:34,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 21:24:34,803 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:34,803 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:24:34,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:35,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 21:24:35,020 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-23 21:24:35,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:35,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1117434242, now seen corresponding path program 1 times [2023-11-23 21:24:35,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:35,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781992470] [2023-11-23 21:24:35,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:35,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:35,033 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:24:35,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1282909220] [2023-11-23 21:24:35,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:35,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:35,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:35,035 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:35,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-23 21:24:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:35,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:24:35,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:35,245 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 21:24:35,245 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:35,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:35,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781992470] [2023-11-23 21:24:35,246 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:24:35,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282909220] [2023-11-23 21:24:35,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282909220] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:35,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:35,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:24:35,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270509141] [2023-11-23 21:24:35,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:35,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:24:35,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:35,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:24:35,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:24:35,248 INFO L87 Difference]: Start difference. First operand 270 states and 336 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 21:24:35,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:35,820 INFO L93 Difference]: Finished difference Result 298 states and 364 transitions. [2023-11-23 21:24:35,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:24:35,821 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2023-11-23 21:24:35,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:35,823 INFO L225 Difference]: With dead ends: 298 [2023-11-23 21:24:35,823 INFO L226 Difference]: Without dead ends: 297 [2023-11-23 21:24:35,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:24:35,824 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 203 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:35,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 153 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:24:35,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-11-23 21:24:35,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 272. [2023-11-23 21:24:35,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 193 states have (on average 1.4922279792746114) internal successors, (288), 244 states have internal predecessors, (288), 25 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-23 21:24:35,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 338 transitions. [2023-11-23 21:24:35,843 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 338 transitions. Word has length 47 [2023-11-23 21:24:35,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:35,844 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 338 transitions. [2023-11-23 21:24:35,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 21:24:35,844 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 338 transitions. [2023-11-23 21:24:35,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 21:24:35,845 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:35,845 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:24:35,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:36,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 21:24:36,065 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-23 21:24:36,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:36,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1117420340, now seen corresponding path program 1 times [2023-11-23 21:24:36,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:36,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053098322] [2023-11-23 21:24:36,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:36,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:36,098 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:24:36,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [97558308] [2023-11-23 21:24:36,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:36,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:36,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:36,104 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:36,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-23 21:24:36,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:36,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:24:36,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:36,342 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 21:24:36,342 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:36,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:36,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053098322] [2023-11-23 21:24:36,343 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:24:36,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97558308] [2023-11-23 21:24:36,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97558308] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:36,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:36,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:24:36,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831174261] [2023-11-23 21:24:36,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:36,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:24:36,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:36,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:24:36,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:24:36,345 INFO L87 Difference]: Start difference. First operand 272 states and 338 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 21:24:37,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:37,012 INFO L93 Difference]: Finished difference Result 297 states and 363 transitions. [2023-11-23 21:24:37,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:24:37,013 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2023-11-23 21:24:37,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:37,015 INFO L225 Difference]: With dead ends: 297 [2023-11-23 21:24:37,015 INFO L226 Difference]: Without dead ends: 296 [2023-11-23 21:24:37,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:24:37,016 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 370 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:37,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 144 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:24:37,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2023-11-23 21:24:37,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 272. [2023-11-23 21:24:37,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 193 states have (on average 1.4870466321243523) internal successors, (287), 244 states have internal predecessors, (287), 25 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-23 21:24:37,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 337 transitions. [2023-11-23 21:24:37,035 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 337 transitions. Word has length 47 [2023-11-23 21:24:37,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:37,035 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 337 transitions. [2023-11-23 21:24:37,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 21:24:37,035 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 337 transitions. [2023-11-23 21:24:37,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-23 21:24:37,036 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:37,036 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:24:37,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:37,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-23 21:24:37,258 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-23 21:24:37,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:37,258 INFO L85 PathProgramCache]: Analyzing trace with hash 808107240, now seen corresponding path program 1 times [2023-11-23 21:24:37,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:37,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824158827] [2023-11-23 21:24:37,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:37,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:37,282 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:24:37,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202411500] [2023-11-23 21:24:37,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:37,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:37,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:37,295 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:37,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-23 21:24:37,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:37,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:24:37,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 21:24:37,455 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:37,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:37,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824158827] [2023-11-23 21:24:37,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:24:37,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202411500] [2023-11-23 21:24:37,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202411500] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:37,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:37,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:24:37,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842219974] [2023-11-23 21:24:37,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:37,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:24:37,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:37,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:24:37,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:24:37,458 INFO L87 Difference]: Start difference. First operand 272 states and 337 transitions. Second operand has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:24:37,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:37,643 INFO L93 Difference]: Finished difference Result 351 states and 405 transitions. [2023-11-23 21:24:37,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:24:37,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2023-11-23 21:24:37,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:37,646 INFO L225 Difference]: With dead ends: 351 [2023-11-23 21:24:37,646 INFO L226 Difference]: Without dead ends: 349 [2023-11-23 21:24:37,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:24:37,647 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 67 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:37,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 133 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:24:37,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2023-11-23 21:24:37,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 280. [2023-11-23 21:24:37,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 201 states have (on average 1.4776119402985075) internal successors, (297), 252 states have internal predecessors, (297), 25 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-23 21:24:37,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 347 transitions. [2023-11-23 21:24:37,667 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 347 transitions. Word has length 50 [2023-11-23 21:24:37,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:37,668 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 347 transitions. [2023-11-23 21:24:37,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:24:37,668 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 347 transitions. [2023-11-23 21:24:37,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-23 21:24:37,669 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:37,669 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:24:37,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:37,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-23 21:24:37,890 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-23 21:24:37,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:37,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1222275624, now seen corresponding path program 1 times [2023-11-23 21:24:37,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:37,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816526651] [2023-11-23 21:24:37,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:37,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:37,901 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:24:37,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [53720829] [2023-11-23 21:24:37,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:37,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:37,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:37,902 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:37,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-23 21:24:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:37,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:24:37,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 21:24:38,057 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:38,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:38,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816526651] [2023-11-23 21:24:38,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:24:38,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53720829] [2023-11-23 21:24:38,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53720829] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:38,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:38,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:24:38,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499352487] [2023-11-23 21:24:38,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:38,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:24:38,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:38,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:24:38,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:24:38,060 INFO L87 Difference]: Start difference. First operand 280 states and 347 transitions. Second operand has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:24:38,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:38,314 INFO L93 Difference]: Finished difference Result 280 states and 347 transitions. [2023-11-23 21:24:38,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:24:38,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2023-11-23 21:24:38,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:38,316 INFO L225 Difference]: With dead ends: 280 [2023-11-23 21:24:38,316 INFO L226 Difference]: Without dead ends: 278 [2023-11-23 21:24:38,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:24:38,317 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 83 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:38,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 74 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:24:38,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2023-11-23 21:24:38,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2023-11-23 21:24:38,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 201 states have (on average 1.4577114427860696) internal successors, (293), 250 states have internal predecessors, (293), 25 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-23 21:24:38,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 343 transitions. [2023-11-23 21:24:38,338 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 343 transitions. Word has length 50 [2023-11-23 21:24:38,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:38,339 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 343 transitions. [2023-11-23 21:24:38,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:24:38,339 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 343 transitions. [2023-11-23 21:24:38,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-23 21:24:38,340 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:38,340 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:24:38,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:38,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:38,560 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-23 21:24:38,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:38,561 INFO L85 PathProgramCache]: Analyzing trace with hash 80495922, now seen corresponding path program 1 times [2023-11-23 21:24:38,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:38,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438301529] [2023-11-23 21:24:38,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:38,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:38,569 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:24:38,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009926038] [2023-11-23 21:24:38,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:38,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:38,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:38,571 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:38,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-23 21:24:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:38,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:24:38,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:38,819 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 21:24:38,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:24:41,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:41,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438301529] [2023-11-23 21:24:41,056 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:24:41,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009926038] [2023-11-23 21:24:41,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009926038] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:24:41,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1449491828] [2023-11-23 21:24:41,080 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2023-11-23 21:24:41,081 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:24:41,085 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:24:41,091 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:24:41,091 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:24:46,584 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-11-23 21:24:46,585 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-23 21:24:46,587 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:24:48,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1449491828] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:48,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:24:48,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [3] total 22 [2023-11-23 21:24:48,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937078034] [2023-11-23 21:24:48,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:48,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-23 21:24:48,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:48,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-23 21:24:48,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=452, Unknown=1, NotChecked=0, Total=600 [2023-11-23 21:24:48,909 INFO L87 Difference]: Start difference. First operand 278 states and 343 transitions. Second operand has 21 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-11-23 21:24:58,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-23 21:25:00,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-23 21:25:01,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:25:01,110 INFO L93 Difference]: Finished difference Result 343 states and 397 transitions. [2023-11-23 21:25:01,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 21:25:01,111 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 53 [2023-11-23 21:25:01,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:25:01,113 INFO L225 Difference]: With dead ends: 343 [2023-11-23 21:25:01,113 INFO L226 Difference]: Without dead ends: 255 [2023-11-23 21:25:01,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 81 SyntacticMatches, 12 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=304, Invalid=751, Unknown=1, NotChecked=0, Total=1056 [2023-11-23 21:25:01,115 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 644 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1582 mSolverCounterSat, 95 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1582 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:25:01,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 118 Invalid, 1678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1582 Invalid, 1 Unknown, 0 Unchecked, 10.9s Time] [2023-11-23 21:25:01,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2023-11-23 21:25:01,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 251. [2023-11-23 21:25:01,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 177 states have (on average 1.4180790960451977) internal successors, (251), 226 states have internal predecessors, (251), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-23 21:25:01,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 295 transitions. [2023-11-23 21:25:01,145 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 295 transitions. Word has length 53 [2023-11-23 21:25:01,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:25:01,145 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 295 transitions. [2023-11-23 21:25:01,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-11-23 21:25:01,146 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 295 transitions. [2023-11-23 21:25:01,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-23 21:25:01,147 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:25:01,147 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:25:01,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-23 21:25:01,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:25:01,372 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-23 21:25:01,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:25:01,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1243105616, now seen corresponding path program 1 times [2023-11-23 21:25:01,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:25:01,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070051054] [2023-11-23 21:25:01,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:25:01,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:25:01,384 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:25:01,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2038742201] [2023-11-23 21:25:01,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:25:01,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:25:01,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:25:01,386 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:25:01,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b7e08b-4493-403c-b296-f9678374b8f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-23 21:25:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:25:01,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 21:25:01,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:25:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-23 21:25:01,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:25:02,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:25:02,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070051054] [2023-11-23 21:25:02,137 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:25:02,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038742201] [2023-11-23 21:25:02,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038742201] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:25:02,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [250087209] [2023-11-23 21:25:02,144 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2023-11-23 21:25:02,144 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:25:02,145 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:25:02,146 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:25:02,146 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:25:06,711 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-11-23 21:25:06,712 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-23 21:25:06,714 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:25:10,419 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14925#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~p~0#1| 1) (<= (+ (* |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~y~0#1|) 9223372036854775809) 0) (<= |ULTIMATE.start_main_~a~0#1| 100) (<= |ULTIMATE.start_main_~b~0#1| 100) (<= 1 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 100) (= |ULTIMATE.start_main_~q~0#1| 0) (<= |ULTIMATE.start_main_~r~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~a~0#1| 195)) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~r~0#1|)) (<= |ULTIMATE.start_main_~y~0#1| 100) (= |ULTIMATE.start_main_~s~0#1| 1))' at error location [2023-11-23 21:25:10,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:25:10,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:25:10,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-11-23 21:25:10,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265703459] [2023-11-23 21:25:10,420 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 21:25:10,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:25:10,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:25:10,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:25:10,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2023-11-23 21:25:10,422 INFO L87 Difference]: Start difference. First operand 251 states and 295 transitions. Second operand has 8 states, 6 states have (on average 6.833333333333333) internal successors, (41), 7 states have internal predecessors, (41), 4 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)