./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound50.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound50.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c7a9d89991bb39658ba66b50d9cb80ba7d1aa37f87b1a2f7972fc25c15a1ea38 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:34:44,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:34:44,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:34:44,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:34:44,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:34:44,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:34:44,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:34:44,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:34:44,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:34:44,750 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:34:44,751 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:34:44,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:34:44,753 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:34:44,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:34:44,755 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:34:44,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:34:44,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:34:44,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:34:44,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:34:44,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:34:44,764 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:34:44,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:34:44,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:34:44,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:34:44,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:34:44,772 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:34:44,773 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:34:44,774 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:34:44,774 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:34:44,776 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:34:44,776 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:34:44,777 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:34:44,778 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:34:44,779 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:34:44,780 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:34:44,780 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:34:44,781 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:34:44,782 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:34:44,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:34:44,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:34:44,784 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:34:44,785 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:34:44,808 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:34:44,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:34:44,809 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:34:44,809 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:34:44,810 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:34:44,810 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:34:44,811 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:34:44,811 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:34:44,811 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:34:44,812 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:34:44,812 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:34:44,812 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:34:44,812 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:34:44,813 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:34:44,813 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:34:44,813 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:34:44,814 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:34:44,814 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:34:44,815 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:34:44,815 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:34:44,815 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:34:44,815 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:34:44,816 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:34:44,816 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:34:44,816 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:34:44,817 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:34:44,817 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:34:44,817 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:34:44,817 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:34:44,818 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:34:44,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:34:44,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:34:44,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:34:44,819 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:34:44,819 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:34:44,819 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:34:44,820 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:34:44,820 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:34:44,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:34:44,820 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:34:44,821 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:34:44,821 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7a9d89991bb39658ba66b50d9cb80ba7d1aa37f87b1a2f7972fc25c15a1ea38 [2022-11-19 08:34:45,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:34:45,101 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:34:45,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:34:45,105 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:34:45,106 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:34:45,107 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound50.i [2022-11-19 08:34:45,170 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/data/15f5b45cc/eaa0ba317e1a4003bb0f60dbb671bdd7/FLAG9ac91d963 [2022-11-19 08:34:45,611 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:34:45,611 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound50.i [2022-11-19 08:34:45,617 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/data/15f5b45cc/eaa0ba317e1a4003bb0f60dbb671bdd7/FLAG9ac91d963 [2022-11-19 08:34:46,004 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/data/15f5b45cc/eaa0ba317e1a4003bb0f60dbb671bdd7 [2022-11-19 08:34:46,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:34:46,009 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:34:46,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:34:46,011 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:34:46,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:34:46,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:34:46" (1/1) ... [2022-11-19 08:34:46,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34a138c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:46, skipping insertion in model container [2022-11-19 08:34:46,021 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:34:46" (1/1) ... [2022-11-19 08:34:46,033 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:34:46,057 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:34:46,302 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound50.i[950,963] [2022-11-19 08:34:46,327 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:34:46,338 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:34:46,358 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound50.i[950,963] [2022-11-19 08:34:46,374 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:34:46,400 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:34:46,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:46 WrapperNode [2022-11-19 08:34:46,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:34:46,402 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:34:46,402 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:34:46,402 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:34:46,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:46" (1/1) ... [2022-11-19 08:34:46,420 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:46" (1/1) ... [2022-11-19 08:34:46,455 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2022-11-19 08:34:46,459 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:34:46,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:34:46,462 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:34:46,462 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:34:46,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:46" (1/1) ... [2022-11-19 08:34:46,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:46" (1/1) ... [2022-11-19 08:34:46,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:46" (1/1) ... [2022-11-19 08:34:46,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:46" (1/1) ... [2022-11-19 08:34:46,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:46" (1/1) ... [2022-11-19 08:34:46,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:46" (1/1) ... [2022-11-19 08:34:46,504 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:46" (1/1) ... [2022-11-19 08:34:46,508 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:46" (1/1) ... [2022-11-19 08:34:46,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:34:46,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:34:46,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:34:46,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:34:46,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:46" (1/1) ... [2022-11-19 08:34:46,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:34:46,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:46,552 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:34:46,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:34:46,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:34:46,602 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 08:34:46,602 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 08:34:46,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:34:46,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:34:46,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:34:46,603 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 08:34:46,603 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 08:34:46,667 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:34:46,669 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:34:46,817 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:34:46,852 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:34:46,852 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 08:34:46,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:34:46 BoogieIcfgContainer [2022-11-19 08:34:46,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:34:46,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:34:46,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:34:46,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:34:46,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:34:46" (1/3) ... [2022-11-19 08:34:46,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5009e155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:34:46, skipping insertion in model container [2022-11-19 08:34:46,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:46" (2/3) ... [2022-11-19 08:34:46,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5009e155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:34:46, skipping insertion in model container [2022-11-19 08:34:46,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:34:46" (3/3) ... [2022-11-19 08:34:46,874 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_valuebound50.i [2022-11-19 08:34:46,891 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:34:46,892 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:34:46,942 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:34:46,949 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=LoopsAndPotentialCycles, 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;@49001893, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:34:46,949 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:34:46,954 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 08:34:46,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 08:34:46,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:46,963 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:46,963 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:46,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:46,969 INFO L85 PathProgramCache]: Analyzing trace with hash 40099495, now seen corresponding path program 1 times [2022-11-19 08:34:46,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:46,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908853632] [2022-11-19 08:34:46,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:46,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:47,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:47,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908853632] [2022-11-19 08:34:47,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-19 08:34:47,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126020450] [2022-11-19 08:34:47,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:47,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:47,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:47,142 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:47,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:34:47,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:47,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-19 08:34:47,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:47,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:34:47,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:47,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126020450] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:47,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:47,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:34:47,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144248198] [2022-11-19 08:34:47,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:47,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 08:34:47,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:47,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 08:34:47,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 08:34:47,407 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:34:47,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:47,450 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2022-11-19 08:34:47,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 08:34:47,453 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 21 [2022-11-19 08:34:47,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:47,461 INFO L225 Difference]: With dead ends: 35 [2022-11-19 08:34:47,461 INFO L226 Difference]: Without dead ends: 21 [2022-11-19 08:34:47,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 08:34:47,476 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:47,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:34:47,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-19 08:34:47,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-19 08:34:47,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 08:34:47,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-11-19 08:34:47,524 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 21 [2022-11-19 08:34:47,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:47,525 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-11-19 08:34:47,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:34:47,526 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-11-19 08:34:47,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:34:47,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:47,528 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:47,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:47,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-19 08:34:47,733 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:47,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:47,734 INFO L85 PathProgramCache]: Analyzing trace with hash -2056079682, now seen corresponding path program 1 times [2022-11-19 08:34:47,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:47,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192286960] [2022-11-19 08:34:47,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:47,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:47,756 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:34:47,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444626277] [2022-11-19 08:34:47,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:47,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:47,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:47,759 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:47,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:34:47,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:47,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 08:34:47,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 08:34:48,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:34:48,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:48,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192286960] [2022-11-19 08:34:48,370 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:34:48,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444626277] [2022-11-19 08:34:48,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444626277] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:48,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:34:48,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2022-11-19 08:34:48,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769781025] [2022-11-19 08:34:48,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:48,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:34:48,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:48,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:34:48,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:34:48,374 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:34:48,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:48,513 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2022-11-19 08:34:48,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:34:48,514 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 22 [2022-11-19 08:34:48,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:48,515 INFO L225 Difference]: With dead ends: 33 [2022-11-19 08:34:48,515 INFO L226 Difference]: Without dead ends: 30 [2022-11-19 08:34:48,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-19 08:34:48,517 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:48,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 63 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 1 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:48,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-19 08:34:48,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-19 08:34:48,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 08:34:48,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-11-19 08:34:48,527 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 22 [2022-11-19 08:34:48,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:48,528 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-11-19 08:34:48,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:34:48,529 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-11-19 08:34:48,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:34:48,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:48,530 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] [2022-11-19 08:34:48,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:48,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:48,736 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:48,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:48,738 INFO L85 PathProgramCache]: Analyzing trace with hash 190159033, now seen corresponding path program 1 times [2022-11-19 08:34:48,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:48,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875445584] [2022-11-19 08:34:48,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:48,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:48,761 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:34:48,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1770482678] [2022-11-19 08:34:48,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:48,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:48,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:48,764 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:48,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:34:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:48,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 08:34:48,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 08:34:49,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:49,395 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:34:49,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:49,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875445584] [2022-11-19 08:34:49,396 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:34:49,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770482678] [2022-11-19 08:34:49,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770482678] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:49,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:34:49,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2022-11-19 08:34:49,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315647777] [2022-11-19 08:34:49,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:49,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:34:49,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:49,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:34:49,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:34:49,402 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:34:49,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:49,460 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2022-11-19 08:34:49,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:34:49,461 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 24 [2022-11-19 08:34:49,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:49,465 INFO L225 Difference]: With dead ends: 38 [2022-11-19 08:34:49,466 INFO L226 Difference]: Without dead ends: 36 [2022-11-19 08:34:49,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-19 08:34:49,471 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:49,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 98 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2022-11-19 08:34:49,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-19 08:34:49,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-19 08:34:49,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 25 states have internal predecessors, (27), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:34:49,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-11-19 08:34:49,497 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 24 [2022-11-19 08:34:49,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:49,498 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-11-19 08:34:49,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:34:49,498 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-11-19 08:34:49,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 08:34:49,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:49,502 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:49,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:49,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-19 08:34:49,710 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:49,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:49,710 INFO L85 PathProgramCache]: Analyzing trace with hash 2136592426, now seen corresponding path program 1 times [2022-11-19 08:34:49,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:49,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681482957] [2022-11-19 08:34:49,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:49,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:49,740 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:34:49,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097805205] [2022-11-19 08:34:49,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:49,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:49,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:49,742 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:49,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:34:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:49,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:34:49,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:49,821 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:34:49,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:49,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:49,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681482957] [2022-11-19 08:34:49,822 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:34:49,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097805205] [2022-11-19 08:34:49,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097805205] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:49,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:49,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:34:49,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627793319] [2022-11-19 08:34:49,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:49,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:49,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:49,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:49,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:49,825 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 08:34:49,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:49,866 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2022-11-19 08:34:49,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:49,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2022-11-19 08:34:49,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:49,870 INFO L225 Difference]: With dead ends: 46 [2022-11-19 08:34:49,871 INFO L226 Difference]: Without dead ends: 29 [2022-11-19 08:34:49,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:49,883 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:49,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:34:49,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-19 08:34:49,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-19 08:34:49,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 08:34:49,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-11-19 08:34:49,890 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 29 [2022-11-19 08:34:49,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:49,891 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-11-19 08:34:49,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 08:34:49,891 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-11-19 08:34:49,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 08:34:49,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:49,892 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:49,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-19 08:34:50,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:50,093 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:50,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:50,094 INFO L85 PathProgramCache]: Analyzing trace with hash 52881113, now seen corresponding path program 1 times [2022-11-19 08:34:50,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:50,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657488855] [2022-11-19 08:34:50,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:50,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:50,128 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:34:50,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274280620] [2022-11-19 08:34:50,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:50,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:50,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:50,136 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:50,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:34:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:50,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:34:50,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 08:34:50,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:50,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 08:34:50,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:50,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657488855] [2022-11-19 08:34:50,408 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:34:50,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274280620] [2022-11-19 08:34:50,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274280620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:50,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [3356379] [2022-11-19 08:34:50,430 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-19 08:34:50,430 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:34:50,435 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:34:50,439 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:34:50,439 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:34:51,010 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2022-11-19 08:34:51,113 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 47 for LOIs [2022-11-19 08:34:51,129 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:34:52,422 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1044#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:34:52,422 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:34:52,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:34:52,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-11-19 08:34:52,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215498048] [2022-11-19 08:34:52,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:34:52,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 08:34:52,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:52,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 08:34:52,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-11-19 08:34:52,424 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-19 08:34:52,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:52,556 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-11-19 08:34:52,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:34:52,557 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 30 [2022-11-19 08:34:52,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:52,557 INFO L225 Difference]: With dead ends: 35 [2022-11-19 08:34:52,557 INFO L226 Difference]: Without dead ends: 28 [2022-11-19 08:34:52,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-11-19 08:34:52,559 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:52,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 105 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:52,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-19 08:34:52,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-19 08:34:52,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 08:34:52,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-11-19 08:34:52,566 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 30 [2022-11-19 08:34:52,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:52,566 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-11-19 08:34:52,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-19 08:34:52,566 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-11-19 08:34:52,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 08:34:52,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:52,567 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:52,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-19 08:34:52,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:52,773 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:52,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:52,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1183920689, now seen corresponding path program 1 times [2022-11-19 08:34:52,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:52,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357986267] [2022-11-19 08:34:52,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:52,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:52,786 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:34:52,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158744626] [2022-11-19 08:34:52,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:52,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:52,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:52,788 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:52,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:34:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:52,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-19 08:34:52,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 08:34:53,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:15,574 WARN L233 SmtUtils]: Spent 5.56s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:35:39,452 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse4 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648)) (.cse5 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (let ((.cse3 (* (* .cse4 |c_ULTIMATE.start_main_~q~0#1|) 2))) (let ((.cse0 (+ |c_ULTIMATE.start_main_~r~0#1| .cse3))) (let ((.cse2 (* (div .cse0 4294967296) 4294967296))) (and (< .cse0 (+ .cse1 .cse2 1)) (< (+ .cse1 .cse2) (+ |c_ULTIMATE.start_main_~r~0#1| .cse3 1)))))) (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse1)) (<= (* 2 .cse4) .cse5) (not (<= (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296) .cse5)))) is different from true [2022-11-19 08:35:54,293 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 2 not checked. [2022-11-19 08:35:54,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:35:54,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357986267] [2022-11-19 08:35:54,293 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:35:54,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158744626] [2022-11-19 08:35:54,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158744626] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:54,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [261072764] [2022-11-19 08:35:54,298 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 08:35:54,298 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:35:54,299 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:35:54,299 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:35:54,299 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:35:55,482 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2022-11-19 08:35:55,506 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 47 for LOIs [2022-11-19 08:35:55,519 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:36:16,266 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1354#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:36:16,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:36:16,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:36:16,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2022-11-19 08:36:16,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454848957] [2022-11-19 08:36:16,267 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:36:16,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 08:36:16,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:16,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 08:36:16,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=913, Unknown=5, NotChecked=62, Total=1122 [2022-11-19 08:36:16,269 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 6 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-19 08:36:20,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:36:32,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:32,090 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2022-11-19 08:36:32,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 08:36:32,090 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 6 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 31 [2022-11-19 08:36:32,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:32,091 INFO L225 Difference]: With dead ends: 38 [2022-11-19 08:36:32,091 INFO L226 Difference]: Without dead ends: 36 [2022-11-19 08:36:32,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 43.7s TimeCoverageRelationStatistics Valid=207, Invalid=1351, Unknown=6, NotChecked=76, Total=1640 [2022-11-19 08:36:32,093 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:32,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 93 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 184 Invalid, 1 Unknown, 31 Unchecked, 11.8s Time] [2022-11-19 08:36:32,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-19 08:36:32,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-11-19 08:36:32,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:36:32,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-11-19 08:36:32,105 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 31 [2022-11-19 08:36:32,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:32,105 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-11-19 08:36:32,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 6 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-19 08:36:32,106 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-11-19 08:36:32,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-19 08:36:32,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:32,107 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:36:32,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-19 08:36:32,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:32,315 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:36:32,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:32,315 INFO L85 PathProgramCache]: Analyzing trace with hash 953799673, now seen corresponding path program 2 times [2022-11-19 08:36:32,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:32,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766073707] [2022-11-19 08:36:32,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:32,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:32,331 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:36:32,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674991993] [2022-11-19 08:36:32,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:36:32,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:32,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:32,334 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:36:32,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:36:32,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:36:32,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:36:32,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:36:32,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:38,499 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 08:36:38,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:39,830 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:36:39,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:39,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766073707] [2022-11-19 08:36:39,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:36:39,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674991993] [2022-11-19 08:36:39,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674991993] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:39,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1770003644] [2022-11-19 08:36:39,834 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 08:36:39,835 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:36:39,835 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:36:39,835 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:36:39,836 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:36:41,078 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2022-11-19 08:36:41,133 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 47 for LOIs [2022-11-19 08:36:41,145 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:36:43,349 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1721#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:36:43,349 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:36:43,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:36:43,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2022-11-19 08:36:43,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761423264] [2022-11-19 08:36:43,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:36:43,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 08:36:43,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:43,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 08:36:43,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-11-19 08:36:43,351 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-19 08:36:45,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-19 08:36:47,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-19 08:36:48,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:48,207 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2022-11-19 08:36:48,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:36:48,208 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 38 [2022-11-19 08:36:48,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:48,209 INFO L225 Difference]: With dead ends: 52 [2022-11-19 08:36:48,209 INFO L226 Difference]: Without dead ends: 37 [2022-11-19 08:36:48,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-11-19 08:36:48,211 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 23 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:48,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 91 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 119 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2022-11-19 08:36:48,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-19 08:36:48,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-19 08:36:48,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:36:48,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-11-19 08:36:48,224 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 38 [2022-11-19 08:36:48,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:48,225 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-11-19 08:36:48,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-19 08:36:48,225 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-11-19 08:36:48,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-19 08:36:48,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:48,227 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:36:48,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:48,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 08:36:48,435 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:36:48,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:48,435 INFO L85 PathProgramCache]: Analyzing trace with hash 493314036, now seen corresponding path program 3 times [2022-11-19 08:36:48,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:48,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086922363] [2022-11-19 08:36:48,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:48,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:48,462 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:36:48,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688671893] [2022-11-19 08:36:48,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:36:48,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:48,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:48,466 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:36:48,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:36:58,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:36:58,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:36:58,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-19 08:36:58,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:07,372 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 08:37:07,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:37:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:37:33,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:37:33,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086922363] [2022-11-19 08:37:33,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:37:33,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688671893] [2022-11-19 08:37:33,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688671893] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:37:33,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1344863249] [2022-11-19 08:37:33,442 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 08:37:33,442 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:37:33,442 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:37:33,443 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:37:33,443 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:37:34,438 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2022-11-19 08:37:34,489 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 47 for LOIs [2022-11-19 08:37:34,501 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:37:44,678 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2132#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:37:44,679 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:37:44,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:37:44,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2022-11-19 08:37:44,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990913586] [2022-11-19 08:37:44,680 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:37:44,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 08:37:44,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:37:44,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 08:37:44,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1095, Unknown=5, NotChecked=0, Total=1260 [2022-11-19 08:37:44,682 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 22 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 9 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-19 08:39:40,188 WARN L233 SmtUtils]: Spent 1.48m on a formula simplification that was a NOOP. DAG size: 118 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:39:42,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:39:45,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:39:48,999 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse11 (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296)) (.cse19 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648)) (.cse10 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (let ((.cse8 (<= (* 2 .cse19) .cse10)) (.cse9 (not (<= .cse11 .cse10))) (.cse0 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse1 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296)) (.cse15 (div .cse11 2))) (and (<= .cse0 50) (let ((.cse6 (mod |c_ULTIMATE.start_main_~b~0#1| 1073741824))) (let ((.cse7 (mod .cse6 2147483648))) (let ((.cse2 (* .cse7 2))) (or (= .cse1 .cse2) (let ((.cse3 (* 4 (* .cse7 |c_ULTIMATE.start_main_~q~0#1|)))) (let ((.cse4 (* (div (+ (* (- 2) .cse6) .cse3 |c_ULTIMATE.start_main_~r~0#1| .cse2) 4294967296) 4294967296)) (.cse5 (* 2 .cse6))) (and (< (+ .cse3 |c_ULTIMATE.start_main_~r~0#1| .cse2) (+ .cse4 .cse0 .cse5 1)) (< (+ .cse4 .cse0 .cse5) (+ .cse3 |c_ULTIMATE.start_main_~r~0#1| .cse2 1))))) (not .cse8) .cse9 (<= (* .cse6 4) .cse10))))) (< .cse1 2147483647) (or (= .cse11 .cse1) (let ((.cse14 (* 2 (* .cse15 |c_ULTIMATE.start_main_~q~0#1|)))) (let ((.cse12 (+ .cse14 |c_ULTIMATE.start_main_~r~0#1|))) (let ((.cse13 (* (div .cse12 4294967296) 4294967296))) (and (< .cse12 (+ .cse0 .cse13 1)) (< (+ .cse0 .cse13) (+ .cse14 |c_ULTIMATE.start_main_~r~0#1| 1))))))) (<= 1 .cse1) (let ((.cse21 (mod .cse19 4294967296))) (or (let ((.cse20 (div .cse21 2))) (let ((.cse16 (* 2 .cse20)) (.cse17 (* (* .cse20 |c_ULTIMATE.start_main_~q~0#1|) 4))) (let ((.cse18 (* (div (+ (- .cse19) .cse16 |c_ULTIMATE.start_main_~r~0#1| .cse17) 4294967296) 4294967296))) (and (< (+ .cse16 |c_ULTIMATE.start_main_~r~0#1| .cse17) (+ .cse0 .cse18 .cse19 1)) (< (+ .cse0 .cse18 .cse19) (+ .cse16 |c_ULTIMATE.start_main_~r~0#1| .cse17 1)))))) .cse8 .cse9 (= .cse1 .cse21))) (let ((.cse29 (mod .cse15 4294967296))) (or (let ((.cse28 (div .cse29 2))) (let ((.cse25 (<= .cse29 .cse10)) (.cse23 (* 4 (* .cse28 |c_ULTIMATE.start_main_~q~0#1|)))) (and (or (let ((.cse24 (+ .cse23 |c_ULTIMATE.start_main_~r~0#1|))) (let ((.cse22 (* (div .cse24 4294967296) 4294967296))) (and (< (+ .cse22 .cse0) (+ .cse23 |c_ULTIMATE.start_main_~r~0#1| 1)) (< .cse24 (+ .cse22 .cse0 1))))) .cse25) (or (not .cse25) (let ((.cse26 (* .cse28 2))) (let ((.cse27 (* (div (+ .cse26 .cse23 (- .cse15) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) 4294967296))) (and (< (+ .cse26 .cse23 |c_ULTIMATE.start_main_~r~0#1|) (+ .cse0 .cse27 .cse15 1)) (< (+ .cse0 .cse27 .cse15) (+ .cse26 .cse23 |c_ULTIMATE.start_main_~r~0#1| 1))))))))) (= .cse29 .cse1)))))) is different from false [2022-11-19 08:39:51,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:39:53,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:39:55,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:39:57,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:40:14,390 WARN L233 SmtUtils]: Spent 6.67s on a formula simplification that was a NOOP. DAG size: 77 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:40:34,909 WARN L233 SmtUtils]: Spent 17.07s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:40:36,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:40:39,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:41:29,620 WARN L233 SmtUtils]: Spent 38.68s on a formula simplification that was a NOOP. DAG size: 101 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:41:32,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:41:34,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:41:45,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:41:47,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:41:49,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:41:51,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:41:53,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:41:56,959 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse8 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296)) (.cse1 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296)) (.cse9 (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296)) (.cse10 (mod |c_ULTIMATE.start_main_~B~0#1| 1073741824)) (.cse0 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296))) (and (<= .cse0 50) (let ((.cse6 (mod |c_ULTIMATE.start_main_~b~0#1| 1073741824))) (let ((.cse7 (mod .cse6 2147483648))) (let ((.cse2 (* .cse7 2))) (or (= .cse1 .cse2) (let ((.cse3 (* 4 (* .cse7 |c_ULTIMATE.start_main_~q~0#1|)))) (let ((.cse4 (* (div (+ (* (- 2) .cse6) .cse3 |c_ULTIMATE.start_main_~r~0#1| .cse2) 4294967296) 4294967296)) (.cse5 (* 2 .cse6))) (and (< (+ .cse3 |c_ULTIMATE.start_main_~r~0#1| .cse2) (+ .cse4 .cse0 .cse5 1)) (< (+ .cse4 .cse0 .cse5) (+ .cse3 |c_ULTIMATE.start_main_~r~0#1| .cse2 1))))) (not (<= (* 2 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648)) .cse8)) (not (<= .cse9 .cse8)) (<= (* .cse6 4) .cse8))))) (<= (* (mod |c_ULTIMATE.start_main_~B~0#1| 2147483648) 2) .cse0) (= 1 |c_ULTIMATE.start_main_~q~0#1|) (<= .cse1 .cse0) (= (+ |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~b~0#1|) |c_ULTIMATE.start_main_~A~0#1|) (= |c_ULTIMATE.start_main_~b~0#1| (* .cse10 2)) (let ((.cse17 (div .cse9 2))) (let ((.cse19 (mod .cse17 4294967296))) (or (let ((.cse18 (div .cse19 2))) (let ((.cse14 (<= .cse19 .cse8)) (.cse12 (* 4 (* .cse18 |c_ULTIMATE.start_main_~q~0#1|)))) (and (or (let ((.cse13 (+ .cse12 |c_ULTIMATE.start_main_~r~0#1|))) (let ((.cse11 (* (div .cse13 4294967296) 4294967296))) (and (< (+ .cse11 .cse0) (+ .cse12 |c_ULTIMATE.start_main_~r~0#1| 1)) (< .cse13 (+ .cse11 .cse0 1))))) .cse14) (or (not .cse14) (let ((.cse15 (* .cse18 2))) (let ((.cse16 (* (div (+ .cse15 .cse12 (- .cse17) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) 4294967296))) (and (< (+ .cse15 .cse12 |c_ULTIMATE.start_main_~r~0#1|) (+ .cse0 .cse16 .cse17 1)) (< (+ .cse0 .cse16 .cse17) (+ .cse15 .cse12 |c_ULTIMATE.start_main_~r~0#1| 1))))))))) (= .cse19 .cse1)))) (not (<= (* .cse10 4) .cse0)))) is different from false [2022-11-19 08:42:10,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:42:13,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:42:15,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:42:17,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:42:30,732 WARN L233 SmtUtils]: Spent 6.31s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:42:32,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:42:34,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:42:42,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:42:44,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:42:46,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:42:48,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:42:51,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:42:53,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:42:55,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:43:23,150 WARN L233 SmtUtils]: Spent 15.11s on a formula simplification that was a NOOP. DAG size: 77 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:43:25,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:43:28,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:43:30,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:43:32,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:43:34,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:43:37,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:43:51,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:43:53,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:43:55,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:43:56,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:43:59,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:44:01,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:44:12,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:44:27,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:44:30,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:44:31,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:44:32,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:44:37,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:44:40,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:44:43,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:44:46,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:44:48,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:44:50,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:44:52,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:44:55,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:44:56,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:44:56,511 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2022-11-19 08:44:56,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-19 08:44:56,512 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 9 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) Word has length 40 [2022-11-19 08:44:56,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:44:56,513 INFO L225 Difference]: With dead ends: 90 [2022-11-19 08:44:56,514 INFO L226 Difference]: Without dead ends: 88 [2022-11-19 08:44:56,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 338.4s TimeCoverageRelationStatistics Valid=321, Invalid=2000, Unknown=39, NotChecked=190, Total=2550 [2022-11-19 08:44:56,516 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 51 mSolverCounterUnsat, 42 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 125.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 42 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 125.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:44:56,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 165 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 399 Invalid, 42 Unknown, 2 Unchecked, 125.8s Time] [2022-11-19 08:44:56,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-19 08:44:56,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 68. [2022-11-19 08:44:56,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.125) internal successors, (54), 52 states have internal predecessors, (54), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 9 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-19 08:44:56,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2022-11-19 08:44:56,560 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 40 [2022-11-19 08:44:56,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:44:56,561 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2022-11-19 08:44:56,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 9 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-19 08:44:56,561 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2022-11-19 08:44:56,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-19 08:44:56,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:44:56,564 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:44:56,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:44:56,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:44:56,767 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:44:56,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:44:56,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1417331559, now seen corresponding path program 4 times [2022-11-19 08:44:56,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:44:56,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749263994] [2022-11-19 08:44:56,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:44:56,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:44:56,785 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:44:56,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [39746435] [2022-11-19 08:44:56,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:44:56,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:44:56,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:44:56,788 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:44:56,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e004925-11af-4fd0-8db3-359683d49950/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process