./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh --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 c39f3d25be406fa166da46a61b4a36c0a90262202dfdee83ae8e5211f182a6f7 --- 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-2329fc7 [2022-12-14 11:26:16,803 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:26:16,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:26:16,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:26:16,825 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:26:16,826 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:26:16,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:26:16,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:26:16,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:26:16,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:26:16,833 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:26:16,834 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:26:16,834 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:26:16,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:26:16,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:26:16,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:26:16,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:26:16,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:26:16,841 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:26:16,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:26:16,844 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:26:16,845 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:26:16,846 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:26:16,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:26:16,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:26:16,851 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:26:16,851 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:26:16,852 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:26:16,853 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:26:16,854 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:26:16,854 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:26:16,855 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:26:16,855 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:26:16,856 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:26:16,857 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:26:16,857 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:26:16,858 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:26:16,858 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:26:16,858 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:26:16,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:26:16,860 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:26:16,861 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 11:26:16,882 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:26:16,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:26:16,883 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:26:16,883 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:26:16,884 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:26:16,884 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:26:16,884 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:26:16,884 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:26:16,885 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:26:16,885 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:26:16,885 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:26:16,885 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:26:16,885 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:26:16,886 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:26:16,886 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:26:16,886 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:26:16,886 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:26:16,886 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:26:16,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:26:16,887 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:26:16,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:26:16,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:26:16,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:26:16,888 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:26:16,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:26:16,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:26:16,889 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:26:16,889 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:26:16,889 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:26:16,889 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:26:16,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:26:16,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:26:16,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:26:16,890 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:26:16,890 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:26:16,890 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:26:16,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:26:16,891 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:26:16,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:26:16,891 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:26:16,891 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:26:16,892 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_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c39f3d25be406fa166da46a61b4a36c0a90262202dfdee83ae8e5211f182a6f7 [2022-12-14 11:26:17,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:26:17,101 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:26:17,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:26:17,104 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:26:17,104 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:26:17,105 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound100.c [2022-12-14 11:26:19,709 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:26:19,885 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:26:19,885 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound100.c [2022-12-14 11:26:19,890 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/data/5d1ac130c/92c7aeefb1c7412eafee484dbbe2d9ff/FLAG9f84fe442 [2022-12-14 11:26:19,904 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/data/5d1ac130c/92c7aeefb1c7412eafee484dbbe2d9ff [2022-12-14 11:26:19,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:26:19,907 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:26:19,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:26:19,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:26:19,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:26:19,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:26:19" (1/1) ... [2022-12-14 11:26:19,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62ed7126 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:19, skipping insertion in model container [2022-12-14 11:26:19,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:26:19" (1/1) ... [2022-12-14 11:26:19,921 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:26:19,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:26:20,040 WARN L237 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_60018864-8ae4-419d-b004-0c63cc10cb5b/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound100.c[526,539] [2022-12-14 11:26:20,050 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:26:20,058 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:26:20,067 WARN L237 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_60018864-8ae4-419d-b004-0c63cc10cb5b/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound100.c[526,539] [2022-12-14 11:26:20,071 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:26:20,082 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:26:20,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:20 WrapperNode [2022-12-14 11:26:20,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:26:20,083 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:26:20,083 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:26:20,083 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:26:20,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:20" (1/1) ... [2022-12-14 11:26:20,094 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:20" (1/1) ... [2022-12-14 11:26:20,107 INFO L138 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-12-14 11:26:20,107 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:26:20,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:26:20,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:26:20,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:26:20,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:20" (1/1) ... [2022-12-14 11:26:20,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:20" (1/1) ... [2022-12-14 11:26:20,117 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:20" (1/1) ... [2022-12-14 11:26:20,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:20" (1/1) ... [2022-12-14 11:26:20,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:20" (1/1) ... [2022-12-14 11:26:20,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:20" (1/1) ... [2022-12-14 11:26:20,124 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:20" (1/1) ... [2022-12-14 11:26:20,125 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:20" (1/1) ... [2022-12-14 11:26:20,127 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:26:20,127 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:26:20,128 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:26:20,128 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:26:20,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:20" (1/1) ... [2022-12-14 11:26:20,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:26:20,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:26:20,155 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:26:20,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:26:20,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:26:20,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:26:20,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:26:20,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:26:20,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 11:26:20,190 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 11:26:20,246 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:26:20,248 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:26:20,347 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:26:20,382 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:26:20,382 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 11:26:20,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:26:20 BoogieIcfgContainer [2022-12-14 11:26:20,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:26:20,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:26:20,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:26:20,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:26:20,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:26:19" (1/3) ... [2022-12-14 11:26:20,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e1844a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:26:20, skipping insertion in model container [2022-12-14 11:26:20,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:20" (2/3) ... [2022-12-14 11:26:20,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e1844a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:26:20, skipping insertion in model container [2022-12-14 11:26:20,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:26:20" (3/3) ... [2022-12-14 11:26:20,391 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_valuebound100.c [2022-12-14 11:26:20,405 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:26:20,405 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 11:26:20,441 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:26:20,445 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;@776bbc0b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:26:20,445 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 11:26:20,448 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 11:26:20,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 11:26:20,453 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:26:20,454 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 11:26:20,454 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:26:20,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:26:20,458 INFO L85 PathProgramCache]: Analyzing trace with hash -697525204, now seen corresponding path program 1 times [2022-12-14 11:26:20,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:26:20,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342324147] [2022-12-14 11:26:20,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:20,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:26:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:26:20,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:26:20,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:26:20,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342324147] [2022-12-14 11:26:20,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342324147] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:26:20,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:26:20,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:26:20,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628602139] [2022-12-14 11:26:20,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:26:20,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:26:20,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:26:20,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:26:20,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:26:20,694 INFO L87 Difference]: Start difference. First operand has 20 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:26:20,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:26:20,768 INFO L93 Difference]: Finished difference Result 51 states and 87 transitions. [2022-12-14 11:26:20,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:26:20,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 11:26:20,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:26:20,777 INFO L225 Difference]: With dead ends: 51 [2022-12-14 11:26:20,777 INFO L226 Difference]: Without dead ends: 28 [2022-12-14 11:26:20,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:26:20,782 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:26:20,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 77 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:26:20,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-14 11:26:20,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2022-12-14 11:26:20,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 11:26:20,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-12-14 11:26:20,812 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 6 [2022-12-14 11:26:20,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:26:20,812 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-12-14 11:26:20,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:26:20,813 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-12-14 11:26:20,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 11:26:20,814 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:26:20,814 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:26:20,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 11:26:20,815 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:26:20,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:26:20,816 INFO L85 PathProgramCache]: Analyzing trace with hash -515229903, now seen corresponding path program 1 times [2022-12-14 11:26:20,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:26:20,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041182164] [2022-12-14 11:26:20,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:20,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:26:20,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:26:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:26:20,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:26:20,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041182164] [2022-12-14 11:26:20,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041182164] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:26:20,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:26:20,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 11:26:20,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401320084] [2022-12-14 11:26:20,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:26:20,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:26:20,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:26:20,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:26:20,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:26:20,925 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:26:20,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:26:20,971 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2022-12-14 11:26:20,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:26:20,971 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-12-14 11:26:20,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:26:20,972 INFO L225 Difference]: With dead ends: 34 [2022-12-14 11:26:20,972 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 11:26:20,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:26:20,973 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:26:20,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 70 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:26:20,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 11:26:20,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2022-12-14 11:26:20,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 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) [2022-12-14 11:26:20,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-12-14 11:26:20,978 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 11 [2022-12-14 11:26:20,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:26:20,979 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-12-14 11:26:20,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:26:20,979 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-12-14 11:26:20,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 11:26:20,979 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:26:20,979 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:26:20,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 11:26:20,979 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:26:20,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:26:20,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1604661492, now seen corresponding path program 1 times [2022-12-14 11:26:20,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:26:20,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927105354] [2022-12-14 11:26:20,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:20,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:26:20,992 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:26:20,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2125069102] [2022-12-14 11:26:20,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:20,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:26:20,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:26:20,993 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:26:20,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:26:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:26:21,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 11:26:21,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:26:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:26:21,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:26:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:26:21,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:26:21,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927105354] [2022-12-14 11:26:21,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:26:21,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125069102] [2022-12-14 11:26:21,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125069102] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:26:21,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1357302693] [2022-12-14 11:26:21,285 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 11:26:21,285 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:26:21,288 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:26:21,292 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:26:21,293 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:26:21,573 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 66 for LOIs [2022-12-14 11:26:21,591 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:26:21,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1357302693] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:26:21,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:26:21,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 7] total 15 [2022-12-14 11:26:21,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799776447] [2022-12-14 11:26:21,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:26:21,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:26:21,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:26:21,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:26:21,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-12-14 11:26:21,983 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 11:26:22,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:26:22,117 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-12-14 11:26:22,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:26:22,118 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2022-12-14 11:26:22,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:26:22,119 INFO L225 Difference]: With dead ends: 61 [2022-12-14 11:26:22,119 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 11:26:22,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-12-14 11:26:22,120 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:26:22,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 51 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:26:22,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 11:26:22,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-12-14 11:26:22,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 11:26:22,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-12-14 11:26:22,128 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 16 [2022-12-14 11:26:22,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:26:22,128 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-12-14 11:26:22,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 11:26:22,129 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-12-14 11:26:22,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 11:26:22,129 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:26:22,129 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-14 11:26:22,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 11:26:22,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:26:22,330 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:26:22,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:26:22,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1042343919, now seen corresponding path program 1 times [2022-12-14 11:26:22,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:26:22,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554890133] [2022-12-14 11:26:22,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:22,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:26:22,338 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:26:22,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279751055] [2022-12-14 11:26:22,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:22,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:26:22,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:26:22,339 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:26:22,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 11:26:22,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:26:22,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 11:26:22,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:26:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 11:26:22,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:26:22,560 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 11:26:22,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:26:22,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554890133] [2022-12-14 11:26:22,561 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:26:22,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279751055] [2022-12-14 11:26:22,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279751055] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:26:22,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [638166124] [2022-12-14 11:26:22,562 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 11:26:22,562 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:26:22,563 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:26:22,563 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:26:22,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:26:24,357 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-12-14 11:26:24,367 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:26:24,886 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '702#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:26:24,886 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:26:24,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:26:24,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2022-12-14 11:26:24,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127980709] [2022-12-14 11:26:24,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:26:24,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 11:26:24,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:26:24,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 11:26:24,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-12-14 11:26:24,888 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2022-12-14 11:26:25,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:26:25,055 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2022-12-14 11:26:25,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 11:26:25,056 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) Word has length 33 [2022-12-14 11:26:25,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:26:25,057 INFO L225 Difference]: With dead ends: 77 [2022-12-14 11:26:25,057 INFO L226 Difference]: Without dead ends: 64 [2022-12-14 11:26:25,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-12-14 11:26:25,058 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 31 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:26:25,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 52 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:26:25,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-14 11:26:25,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-12-14 11:26:25,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 39 states have internal predecessors, (40), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-12-14 11:26:25,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2022-12-14 11:26:25,068 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 33 [2022-12-14 11:26:25,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:26:25,068 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2022-12-14 11:26:25,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2022-12-14 11:26:25,069 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2022-12-14 11:26:25,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 11:26:25,069 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:26:25,069 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:26:25,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 11:26:25,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:26:25,271 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:26:25,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:26:25,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1798480357, now seen corresponding path program 1 times [2022-12-14 11:26:25,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:26:25,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2903095] [2022-12-14 11:26:25,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:25,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:26:25,297 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:26:25,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090607810] [2022-12-14 11:26:25,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:25,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:26:25,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:26:25,301 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:26:25,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 11:26:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:26:25,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 11:26:25,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:26:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 11:26:25,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:26:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-14 11:26:25,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:26:25,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2903095] [2022-12-14 11:26:25,505 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:26:25,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090607810] [2022-12-14 11:26:25,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090607810] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:26:25,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [449930259] [2022-12-14 11:26:25,508 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 11:26:25,508 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:26:25,508 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:26:25,508 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:26:25,508 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:26:27,072 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-12-14 11:26:27,083 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:26:27,635 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1175#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:26:27,635 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:26:27,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:26:27,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-12-14 11:26:27,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323976656] [2022-12-14 11:26:27,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:26:27,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 11:26:27,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:26:27,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 11:26:27,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-12-14 11:26:27,637 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 11:26:27,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:26:27,733 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2022-12-14 11:26:27,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:26:27,734 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 40 [2022-12-14 11:26:27,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:26:27,735 INFO L225 Difference]: With dead ends: 73 [2022-12-14 11:26:27,735 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 11:26:27,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-12-14 11:26:27,736 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:26:27,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 46 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:26:27,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 11:26:27,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-12-14 11:26:27,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 40 states have (on average 1.125) internal successors, (45), 43 states have internal predecessors, (45), 21 states have call successors, (21), 8 states have call predecessors, (21), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-12-14 11:26:27,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2022-12-14 11:26:27,751 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 40 [2022-12-14 11:26:27,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:26:27,751 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2022-12-14 11:26:27,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 11:26:27,752 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2022-12-14 11:26:27,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 11:26:27,753 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:26:27,753 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:26:27,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 11:26:27,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:26:27,955 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:26:27,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:26:27,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1731990838, now seen corresponding path program 1 times [2022-12-14 11:26:27,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:26:27,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242173908] [2022-12-14 11:26:27,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:27,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:26:27,968 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:26:27,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450420649] [2022-12-14 11:26:27,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:27,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:26:27,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:26:27,970 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:26:27,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 11:26:28,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:26:28,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 11:26:28,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:26:28,187 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 11:26:28,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:26:29,563 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 11:26:29,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:26:29,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242173908] [2022-12-14 11:26:29,563 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:26:29,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450420649] [2022-12-14 11:26:29,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450420649] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:26:29,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [907408445] [2022-12-14 11:26:29,565 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 11:26:29,565 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:26:29,565 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:26:29,565 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:26:29,566 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:26:31,899 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-12-14 11:26:31,907 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:26:32,579 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1725#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:26:32,579 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:26:32,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:26:32,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-12-14 11:26:32,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718812768] [2022-12-14 11:26:32,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:26:32,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 11:26:32,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:26:32,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 11:26:32,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-12-14 11:26:32,580 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 11:26:34,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:26:34,079 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2022-12-14 11:26:34,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 11:26:34,080 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 52 [2022-12-14 11:26:34,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:26:34,081 INFO L225 Difference]: With dead ends: 96 [2022-12-14 11:26:34,081 INFO L226 Difference]: Without dead ends: 94 [2022-12-14 11:26:34,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2022-12-14 11:26:34,083 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 35 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 11:26:34,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 63 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 11:26:34,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-12-14 11:26:34,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2022-12-14 11:26:34,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 60 states have internal predecessors, (61), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-12-14 11:26:34,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2022-12-14 11:26:34,104 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 52 [2022-12-14 11:26:34,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:26:34,105 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2022-12-14 11:26:34,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 11:26:34,105 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2022-12-14 11:26:34,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 11:26:34,107 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:26:34,107 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:26:34,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 11:26:34,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:26:34,308 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:26:34,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:26:34,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1143375622, now seen corresponding path program 1 times [2022-12-14 11:26:34,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:26:34,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064736997] [2022-12-14 11:26:34,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:34,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:26:34,337 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:26:34,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1775833013] [2022-12-14 11:26:34,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:34,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:26:34,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:26:34,341 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:26:34,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 11:26:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:26:34,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 11:26:34,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:26:34,613 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-12-14 11:26:34,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:26:35,037 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-12-14 11:26:35,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:26:35,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064736997] [2022-12-14 11:26:35,038 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:26:35,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775833013] [2022-12-14 11:26:35,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775833013] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:26:35,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1276111383] [2022-12-14 11:26:35,040 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 11:26:35,040 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:26:35,040 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:26:35,041 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:26:35,041 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:26:37,259 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-12-14 11:26:37,265 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:26:38,045 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2410#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:26:38,045 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:26:38,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:26:38,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-12-14 11:26:38,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098498217] [2022-12-14 11:26:38,046 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:26:38,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 11:26:38,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:26:38,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 11:26:38,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-12-14 11:26:38,048 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2022-12-14 11:26:40,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 11:26:41,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 11:26:42,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:26:42,076 INFO L93 Difference]: Finished difference Result 114 states and 133 transitions. [2022-12-14 11:26:42,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 11:26:42,076 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) Word has length 63 [2022-12-14 11:26:42,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:26:42,077 INFO L225 Difference]: With dead ends: 114 [2022-12-14 11:26:42,077 INFO L226 Difference]: Without dead ends: 99 [2022-12-14 11:26:42,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 157 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 11:26:42,078 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 23 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-12-14 11:26:42,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 72 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-12-14 11:26:42,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-12-14 11:26:42,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2022-12-14 11:26:42,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 18 states have call successors, (18), 13 states have call predecessors, (18), 13 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-12-14 11:26:42,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 93 transitions. [2022-12-14 11:26:42,098 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 93 transitions. Word has length 63 [2022-12-14 11:26:42,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:26:42,098 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 93 transitions. [2022-12-14 11:26:42,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2022-12-14 11:26:42,098 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 93 transitions. [2022-12-14 11:26:42,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 11:26:42,099 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:26:42,099 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:26:42,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 11:26:42,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 11:26:42,301 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:26:42,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:26:42,302 INFO L85 PathProgramCache]: Analyzing trace with hash 2113244439, now seen corresponding path program 1 times [2022-12-14 11:26:42,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:26:42,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765975772] [2022-12-14 11:26:42,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:42,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:26:42,311 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:26:42,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [27805234] [2022-12-14 11:26:42,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:42,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:26:42,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:26:42,312 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:26:42,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 11:26:42,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:26:42,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:26:42,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:26:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-12-14 11:26:42,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:26:42,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:26:42,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765975772] [2022-12-14 11:26:42,387 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:26:42,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27805234] [2022-12-14 11:26:42,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27805234] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:26:42,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:26:42,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 11:26:42,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501198992] [2022-12-14 11:26:42,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:26:42,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:26:42,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:26:42,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:26:42,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:26:42,389 INFO L87 Difference]: Start difference. First operand 85 states and 93 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-12-14 11:26:42,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:26:42,439 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2022-12-14 11:26:42,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:26:42,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 73 [2022-12-14 11:26:42,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:26:42,440 INFO L225 Difference]: With dead ends: 92 [2022-12-14 11:26:42,440 INFO L226 Difference]: Without dead ends: 80 [2022-12-14 11:26:42,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:26:42,442 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 3 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:26:42,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 86 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:26:42,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-14 11:26:42,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-12-14 11:26:42,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 50 states have (on average 1.06) internal successors, (53), 51 states have internal predecessors, (53), 17 states have call successors, (17), 12 states have call predecessors, (17), 12 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-12-14 11:26:42,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2022-12-14 11:26:42,456 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 73 [2022-12-14 11:26:42,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:26:42,456 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2022-12-14 11:26:42,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-12-14 11:26:42,457 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2022-12-14 11:26:42,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 11:26:42,457 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:26:42,457 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 11:26:42,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 11:26:42,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 11:26:42,659 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:26:42,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:26:42,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1241228560, now seen corresponding path program 2 times [2022-12-14 11:26:42,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:26:42,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615771618] [2022-12-14 11:26:42,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:42,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:26:42,680 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:26:42,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [297980436] [2022-12-14 11:26:42,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:26:42,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:26:42,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:26:42,684 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:26:42,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 11:26:42,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 11:26:42,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:26:42,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 11:26:42,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:26:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 41 proven. 34 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-14 11:26:42,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:26:43,713 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2022-12-14 11:26:43,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:26:43,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615771618] [2022-12-14 11:26:43,714 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:26:43,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297980436] [2022-12-14 11:26:43,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297980436] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:26:43,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1342533500] [2022-12-14 11:26:43,716 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 11:26:43,716 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:26:43,717 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:26:43,717 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:26:43,717 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:26:45,742 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-12-14 11:26:45,747 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:26:46,403 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3643#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:26:46,403 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:26:46,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:26:46,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2022-12-14 11:26:46,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533810618] [2022-12-14 11:26:46,403 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:26:46,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 11:26:46,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:26:46,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 11:26:46,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2022-12-14 11:26:46,404 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2022-12-14 11:26:53,424 WARN L233 SmtUtils]: Spent 6.83s on a formula simplification. DAG size of input: 38 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:26:54,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:26:54,043 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2022-12-14 11:26:54,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 11:26:54,044 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) Word has length 74 [2022-12-14 11:26:54,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:26:54,046 INFO L225 Difference]: With dead ends: 112 [2022-12-14 11:26:54,046 INFO L226 Difference]: Without dead ends: 110 [2022-12-14 11:26:54,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 189 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2022-12-14 11:26:54,047 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 26 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:26:54,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 88 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 11:26:54,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-12-14 11:26:54,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2022-12-14 11:26:54,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 67 states have internal predecessors, (70), 28 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-12-14 11:26:54,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 125 transitions. [2022-12-14 11:26:54,076 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 125 transitions. Word has length 74 [2022-12-14 11:26:54,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:26:54,076 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 125 transitions. [2022-12-14 11:26:54,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2022-12-14 11:26:54,076 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 125 transitions. [2022-12-14 11:26:54,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 11:26:54,077 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:26:54,077 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-12-14 11:26:54,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 11:26:54,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:26:54,279 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:26:54,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:26:54,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1175687132, now seen corresponding path program 3 times [2022-12-14 11:26:54,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:26:54,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714636706] [2022-12-14 11:26:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:54,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:26:54,307 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:26:54,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1463322575] [2022-12-14 11:26:54,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:26:54,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:26:54,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:26:54,311 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:26:54,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 11:26:54,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:26:54,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:26:54,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-14 11:26:54,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:27:15,925 WARN L233 SmtUtils]: Spent 6.39s on a formula simplification. DAG size of input: 48 DAG size of output: 42 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:27:32,321 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 102 proven. 67 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-12-14 11:27:32,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:27:57,724 WARN L859 $PredicateComparison]: unable to prove that (or (not (= (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~d~0#1|)) (let ((.cse12 (* |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse16 (div |c_ULTIMATE.start_main_~d~0#1| 2))) (let ((.cse17 (<= (+ .cse16 1) |c_ULTIMATE.start_main_~r~0#1|)) (.cse15 (< |c_ULTIMATE.start_main_~d~0#1| 0)) (.cse2 (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0)) (.cse19 (<= .cse16 |c_ULTIMATE.start_main_~r~0#1|)) (.cse18 (= |c_ULTIMATE.start_main_~A~0#1| (+ .cse12 |c_ULTIMATE.start_main_~r~0#1|)))) (let ((.cse1 (< |c_ULTIMATE.start_main_~p~0#1| 0)) (.cse8 (or .cse19 .cse18)) (.cse9 (not .cse19)) (.cse10 (+ .cse16 |c_ULTIMATE.start_main_~A~0#1|)) (.cse11 (and .cse15 (not .cse2))) (.cse3 (or .cse17 .cse18)) (.cse4 (not .cse17)) (.cse5 (+ .cse16 |c_ULTIMATE.start_main_~A~0#1| 1)) (.cse7 (not .cse15)) (.cse13 (* (div |c_ULTIMATE.start_main_~p~0#1| 2) |c_ULTIMATE.start_main_~B~0#1|)) (.cse0 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0))) (and (or (and (not .cse0) .cse1) (let ((.cse6 (+ .cse12 |c_ULTIMATE.start_main_~r~0#1| .cse13))) (and (or .cse2 (and .cse3 (or .cse4 (= .cse5 .cse6))) .cse7) (or (and .cse8 (or .cse9 (= .cse10 .cse6))) .cse11)))) (or (not .cse1) (let ((.cse14 (+ .cse12 |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~B~0#1| .cse13))) (and (or (and .cse8 (or .cse9 (= .cse10 .cse14))) .cse11) (or (and .cse3 (or .cse4 (= .cse5 .cse14))) .cse2 .cse7))) .cse0)))))) is different from true [2022-12-14 11:28:57,820 WARN L233 SmtUtils]: Spent 20.87s on a formula simplification that was a NOOP. DAG size: 120 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:30:49,320 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 105 proven. 33 refuted. 0 times theorem prover too weak. 222 trivial. 1 not checked. [2022-12-14 11:30:49,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:30:49,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714636706] [2022-12-14 11:30:49,320 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:30:49,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463322575] [2022-12-14 11:30:49,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463322575] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:30:49,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [309590237] [2022-12-14 11:30:49,322 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 11:30:49,322 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:30:49,322 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:30:49,323 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:30:49,323 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:30:51,239 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-12-14 11:30:51,244 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:30:58,603 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4492#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:30:58,603 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:30:58,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:30:58,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2022-12-14 11:30:58,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729010777] [2022-12-14 11:30:58,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:30:58,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 11:30:58,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:30:58,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 11:30:58,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=915, Unknown=2, NotChecked=64, Total=1190 [2022-12-14 11:30:58,605 INFO L87 Difference]: Start difference. First operand 108 states and 125 transitions. Second operand has 25 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 17 states have internal predecessors, (35), 16 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 13 states have call predecessors, (24), 14 states have call successors, (24) [2022-12-14 11:32:18,175 WARN L233 SmtUtils]: Spent 1.23m on a formula simplification. DAG size of input: 167 DAG size of output: 112 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:32:36,530 WARN L233 SmtUtils]: Spent 8.05s on a formula simplification. DAG size of input: 123 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:32:38,980 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 [] [2022-12-14 11:32:48,171 WARN L233 SmtUtils]: Spent 5.37s on a formula simplification. DAG size of input: 87 DAG size of output: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:32:50,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 11:32:58,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 11:33:00,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 11:33:02,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 11:33:04,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 11:33:06,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 11:33:08,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 11:33:14,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 11:33:16,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 11:33:18,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 11:33:21,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 11:33:26,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 11:33:28,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 11:33:31,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 11:33:33,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 11:33:35,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 11:34:17,516 WARN L233 SmtUtils]: Spent 35.57s on a formula simplification. DAG size of input: 181 DAG size of output: 119 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:34:20,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 11:34:21,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 11:34:26,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 11:35:06,162 WARN L233 SmtUtils]: Spent 30.58s on a formula simplification. DAG size of input: 122 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:35:07,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 11:36:01,700 WARN L233 SmtUtils]: Spent 31.06s on a formula simplification. DAG size of input: 139 DAG size of output: 84 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:36:08,724 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse7 (* |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (let ((.cse17 (div |c_ULTIMATE.start_main_~p~0#1| 2)) (.cse35 (= |c_ULTIMATE.start_main_~A~0#1| (+ .cse7 |c_ULTIMATE.start_main_~r~0#1|))) (.cse0 (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0)) (.cse36 (< |c_ULTIMATE.start_main_~d~0#1| 0)) (.cse4 (div |c_ULTIMATE.start_main_~d~0#1| 2))) (let ((.cse1 (+ .cse4 1)) (.cse3 (not .cse36)) (.cse5 (and .cse36 (not .cse0))) (.cse18 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0)) (.cse6 (< |c_ULTIMATE.start_main_~p~0#1| 0)) (.cse9 (not .cse35)) (.cse13 (* .cse17 |c_ULTIMATE.start_main_~B~0#1|))) (and (let ((.cse2 (+ |c_ULTIMATE.start_main_~B~0#1| .cse13))) (or (and (or .cse0 (not (= .cse1 .cse2)) .cse3) (or (not (= .cse4 .cse2)) .cse5)) (not .cse6) (let ((.cse16 (+ .cse17 1))) (let ((.cse15 (+ |c_ULTIMATE.start_main_~B~0#1| (* (div .cse16 2) |c_ULTIMATE.start_main_~B~0#1|))) (.cse8 (div .cse2 2))) (let ((.cse10 (= .cse15 .cse8)) (.cse11 (<= .cse2 |c_ULTIMATE.start_main_~r~0#1|)) (.cse12 (= (mod .cse16 2) 0))) (and (or (not (<= (+ .cse7 .cse8) |c_ULTIMATE.start_main_~A~0#1|)) .cse9 .cse10 .cse11 .cse12) (or (let ((.cse14 (< .cse2 0))) (and (or (not (<= (+ .cse7 .cse8 |c_ULTIMATE.start_main_~B~0#1| .cse13) |c_ULTIMATE.start_main_~A~0#1|)) .cse10 (and .cse14 (not (= (mod .cse2 2) 0)))) (or (not .cse14) (= .cse15 (+ .cse8 1))))) (not .cse11) .cse9 .cse12))))) .cse18)) (or (and (or (not (= .cse13 .cse1)) .cse0 .cse3) (or (not (= .cse4 .cse13)) .cse5)) (and (not .cse18) .cse6) (let ((.cse31 (* (div |c_ULTIMATE.start_main_~p~0#1| 4) |c_ULTIMATE.start_main_~B~0#1|))) (let ((.cse24 (< .cse17 0)) (.cse33 (+ .cse31 |c_ULTIMATE.start_main_~B~0#1|)) (.cse25 (div .cse13 2))) (let ((.cse26 (<= .cse13 |c_ULTIMATE.start_main_~r~0#1|)) (.cse23 (= .cse25 .cse31)) (.cse20 (= (mod .cse17 2) 0)) (.cse19 (= .cse25 .cse33)) (.cse22 (not .cse24))) (and (or (let ((.cse21 (not (<= (+ .cse25 .cse7) |c_ULTIMATE.start_main_~A~0#1|)))) (and (or .cse19 .cse20 .cse21 .cse22) (or .cse23 .cse21 .cse24))) .cse26 .cse9) (or (not .cse26) .cse9 (let ((.cse29 (= (mod .cse13 2) 0)) (.cse34 (< .cse13 0))) (let ((.cse32 (+ .cse25 1)) (.cse30 (not .cse34)) (.cse27 (and .cse34 (not .cse29))) (.cse28 (not (<= (+ .cse25 .cse7 .cse13) |c_ULTIMATE.start_main_~A~0#1|)))) (and (or (and (or .cse27 .cse23 .cse28) (or .cse29 .cse30 (= .cse31 .cse32))) .cse24) (or .cse20 (and (or (= .cse32 .cse33) .cse30) (or .cse19 .cse27 .cse28)) .cse22)))))))))) .cse35 (= (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~d~0#1|))))) is different from false [2022-12-14 11:36:08,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:36:08,733 INFO L93 Difference]: Finished difference Result 130 states and 153 transitions. [2022-12-14 11:36:08,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 11:36:08,734 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 17 states have internal predecessors, (35), 16 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 13 states have call predecessors, (24), 14 states have call successors, (24) Word has length 81 [2022-12-14 11:36:08,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:36:08,734 INFO L225 Difference]: With dead ends: 130 [2022-12-14 11:36:08,734 INFO L226 Difference]: Without dead ends: 128 [2022-12-14 11:36:08,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 202 SyntacticMatches, 10 SemanticMatches, 46 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 338.4s TimeCoverageRelationStatistics Valid=355, Invalid=1708, Unknown=15, NotChecked=178, Total=2256 [2022-12-14 11:36:08,735 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 28 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 57 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 58.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:36:08,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 121 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 559 Invalid, 10 Unknown, 70 Unchecked, 58.1s Time] [2022-12-14 11:36:08,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-12-14 11:36:08,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2022-12-14 11:36:08,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 75 states have internal predecessors, (77), 29 states have call successors, (29), 16 states have call predecessors, (29), 16 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-12-14 11:36:08,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 134 transitions. [2022-12-14 11:36:08,780 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 134 transitions. Word has length 81 [2022-12-14 11:36:08,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:36:08,780 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 134 transitions. [2022-12-14 11:36:08,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 17 states have internal predecessors, (35), 16 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 13 states have call predecessors, (24), 14 states have call successors, (24) [2022-12-14 11:36:08,780 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 134 transitions. [2022-12-14 11:36:08,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 11:36:08,781 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:36:08,781 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 11:36:08,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 11:36:08,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 11:36:08,983 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:36:08,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:36:08,984 INFO L85 PathProgramCache]: Analyzing trace with hash 20862120, now seen corresponding path program 2 times [2022-12-14 11:36:08,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:36:08,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746125180] [2022-12-14 11:36:08,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:36:08,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:36:08,994 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:36:08,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976253531] [2022-12-14 11:36:08,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:36:08,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:36:08,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:36:08,995 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:36:08,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 11:36:09,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 11:36:09,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:36:09,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 11:36:09,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:36:09,221 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 117 proven. 42 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-12-14 11:36:09,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:36:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2022-12-14 11:36:09,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:36:09,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746125180] [2022-12-14 11:36:09,385 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:36:09,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976253531] [2022-12-14 11:36:09,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976253531] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:36:09,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1691921684] [2022-12-14 11:36:09,387 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 11:36:09,387 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:36:09,388 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:36:09,388 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:36:09,388 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:36:11,656 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-12-14 11:36:11,664 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:36:12,657 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5466#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:36:12,657 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:36:12,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:36:12,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 18 [2022-12-14 11:36:12,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104695658] [2022-12-14 11:36:12,657 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:36:12,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 11:36:12,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:36:12,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 11:36:12,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-12-14 11:36:12,659 INFO L87 Difference]: Start difference. First operand 118 states and 134 transitions. Second operand has 18 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-12-14 11:36:13,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:36:13,015 INFO L93 Difference]: Finished difference Result 118 states and 134 transitions. [2022-12-14 11:36:13,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:36:13,016 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 92 [2022-12-14 11:36:13,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:36:13,016 INFO L225 Difference]: With dead ends: 118 [2022-12-14 11:36:13,016 INFO L226 Difference]: Without dead ends: 0 [2022-12-14 11:36:13,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 241 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 11:36:13,017 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 37 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:36:13,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 29 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:36:13,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-14 11:36:13,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-14 11:36:13,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:13,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-14 11:36:13,018 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 92 [2022-12-14 11:36:13,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:36:13,018 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-14 11:36:13,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-12-14 11:36:13,018 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-14 11:36:13,018 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-14 11:36:13,020 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 11:36:13,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 11:36:13,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 11:36:13,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-12-14 11:36:21,245 WARN L233 SmtUtils]: Spent 7.54s on a formula simplification. DAG size of input: 253 DAG size of output: 108 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-12-14 11:36:30,270 WARN L233 SmtUtils]: Spent 8.01s on a formula simplification. DAG size of input: 253 DAG size of output: 108 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-12-14 11:36:38,217 WARN L233 SmtUtils]: Spent 7.35s on a formula simplification. DAG size of input: 253 DAG size of output: 108 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-12-14 11:36:45,475 WARN L233 SmtUtils]: Spent 7.25s on a formula simplification. DAG size of input: 253 DAG size of output: 108 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-12-14 11:36:45,478 INFO L895 garLoopResultBuilder]: At program point L52-2(lines 44 56) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~A~0#1| (+ |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|)) (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2022-12-14 11:36:45,478 INFO L895 garLoopResultBuilder]: At program point L44-1(lines 44 56) the Hoare annotation is: (and (= |ULTIMATE.start_main_~d~0#1| 1) (= |ULTIMATE.start_main_~A~0#1| (+ (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|)) (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2022-12-14 11:36:45,478 INFO L895 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse6 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse1 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse2 (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse4 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (let ((.cse3 (select |#memory_int| 1)) (.cse0 (select |#memory_int| 2))) (and (= (select .cse0 7) 0) (= (select |#length| 3) 12) (= 114 (select .cse0 2)) (= (ite (and (<= |ULTIMATE.start_main_~A~0#1| 100) (<= 0 |ULTIMATE.start_main_~A~0#1|)) 1 0) |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (select .cse0 6) 99) (= 97 (select .cse0 1)) (= 2 (select |#length| 1)) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 3) 1) (= (select .cse0 4) 50) (= 100 (select .cse0 3)) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select |#valid| 1) 1) .cse1 (= (select |#valid| 0) 0) (not (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (select .cse0 5) 46) (= (select |#valid| 2) 1) .cse2 (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse3 0) 48) (= (+ (* |ULTIMATE.start_main_~B~0#1| (div |ULTIMATE.start_main_~p~0#1| 2)) (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) (+ (div |ULTIMATE.start_main_~d~0#1| 2) |ULTIMATE.start_main_~A~0#1|)) .cse4 (= (select .cse3 1) 0) (= (select .cse0 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (let ((.cse5 (* |ULTIMATE.start_main_~B~0#1| (div (- (div (- |ULTIMATE.start_main_~p~0#1|) (- 2))) (- 2))))) (and (<= 4 |ULTIMATE.start_main_~p~0#1|) (<= (* 2 .cse5) |ULTIMATE.start_main_~r~0#1|) .cse6 (= (* .cse5 4) |ULTIMATE.start_main_~d~0#1|) .cse1 .cse2)) (and .cse6 .cse1 (<= 1 |ULTIMATE.start_main_~r~0#1|) .cse2 .cse4 (= 2 |ULTIMATE.start_main_~d~0#1|)))) [2022-12-14 11:36:45,478 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~A~0#1| (+ |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|)) (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2022-12-14 11:36:45,478 INFO L895 garLoopResultBuilder]: At program point L45-1(line 45) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~A~0#1| (+ |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|)) (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2022-12-14 11:36:45,478 INFO L899 garLoopResultBuilder]: For program point L37(lines 34 42) no Hoare annotation was computed. [2022-12-14 11:36:45,478 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-12-14 11:36:45,478 INFO L895 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (and (= |ULTIMATE.start_main_~p~0#1| 1) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2022-12-14 11:36:45,478 INFO L899 garLoopResultBuilder]: For program point L46(lines 44 56) no Hoare annotation was computed. [2022-12-14 11:36:45,478 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2022-12-14 11:36:45,479 INFO L895 garLoopResultBuilder]: At program point L34-2(lines 34 42) the Hoare annotation is: (let ((.cse6 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse1 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse2 (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse4 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (let ((.cse3 (select |#memory_int| 1)) (.cse0 (select |#memory_int| 2))) (and (= (select .cse0 7) 0) (= (select |#length| 3) 12) (= 114 (select .cse0 2)) (= (ite (and (<= |ULTIMATE.start_main_~A~0#1| 100) (<= 0 |ULTIMATE.start_main_~A~0#1|)) 1 0) |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (select .cse0 6) 99) (= 97 (select .cse0 1)) (= 2 (select |#length| 1)) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 3) 1) (= (select .cse0 4) 50) (= 100 (select .cse0 3)) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select |#valid| 1) 1) .cse1 (= (select |#valid| 0) 0) (not (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (select .cse0 5) 46) (= (select |#valid| 2) 1) .cse2 (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse3 0) 48) (= (+ (* |ULTIMATE.start_main_~B~0#1| (div |ULTIMATE.start_main_~p~0#1| 2)) (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) (+ (div |ULTIMATE.start_main_~d~0#1| 2) |ULTIMATE.start_main_~A~0#1|)) .cse4 (= (select .cse3 1) 0) (= (select .cse0 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (let ((.cse5 (* |ULTIMATE.start_main_~B~0#1| (div (- (div (- |ULTIMATE.start_main_~p~0#1|) (- 2))) (- 2))))) (and (<= 4 |ULTIMATE.start_main_~p~0#1|) (<= (* 2 .cse5) |ULTIMATE.start_main_~r~0#1|) .cse6 (= (* .cse5 4) |ULTIMATE.start_main_~d~0#1|) .cse1 .cse2)) (and .cse6 .cse1 (<= 1 |ULTIMATE.start_main_~r~0#1|) .cse2 .cse4 (= 2 |ULTIMATE.start_main_~d~0#1|)))) [2022-12-14 11:36:45,479 INFO L902 garLoopResultBuilder]: At program point L59(line 59) the Hoare annotation is: true [2022-12-14 11:36:45,479 INFO L895 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse6 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse1 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse2 (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse4 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (let ((.cse3 (select |#memory_int| 1)) (.cse0 (select |#memory_int| 2))) (and (= (select .cse0 7) 0) (= (select |#length| 3) 12) (= 114 (select .cse0 2)) (= (ite (and (<= |ULTIMATE.start_main_~A~0#1| 100) (<= 0 |ULTIMATE.start_main_~A~0#1|)) 1 0) |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (select .cse0 6) 99) (= 97 (select .cse0 1)) (= 2 (select |#length| 1)) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 3) 1) (= (select .cse0 4) 50) (= 100 (select .cse0 3)) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select |#valid| 1) 1) .cse1 (= (select |#valid| 0) 0) (not (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (select .cse0 5) 46) (= (select |#valid| 2) 1) .cse2 (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse3 0) 48) (= (+ (* |ULTIMATE.start_main_~B~0#1| (div |ULTIMATE.start_main_~p~0#1| 2)) (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) (+ (div |ULTIMATE.start_main_~d~0#1| 2) |ULTIMATE.start_main_~A~0#1|)) .cse4 (= (select .cse3 1) 0) (= (select .cse0 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (let ((.cse5 (* |ULTIMATE.start_main_~B~0#1| (div (- (div (- |ULTIMATE.start_main_~p~0#1|) (- 2))) (- 2))))) (and (<= 4 |ULTIMATE.start_main_~p~0#1|) (<= (* 2 .cse5) |ULTIMATE.start_main_~r~0#1|) .cse6 (= (* .cse5 4) |ULTIMATE.start_main_~d~0#1|) .cse1 .cse2)) (and .cse6 .cse1 (<= 1 |ULTIMATE.start_main_~r~0#1|) .cse2 .cse4 (= 2 |ULTIMATE.start_main_~d~0#1|)))) [2022-12-14 11:36:45,479 INFO L895 garLoopResultBuilder]: At program point L35-1(line 35) the Hoare annotation is: (let ((.cse6 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse1 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse2 (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse4 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (let ((.cse3 (select |#memory_int| 1)) (.cse0 (select |#memory_int| 2))) (and (= (select .cse0 7) 0) (= (select |#length| 3) 12) (= 114 (select .cse0 2)) (= (ite (and (<= |ULTIMATE.start_main_~A~0#1| 100) (<= 0 |ULTIMATE.start_main_~A~0#1|)) 1 0) |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (select .cse0 6) 99) (= 97 (select .cse0 1)) (= 2 (select |#length| 1)) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 3) 1) (= (select .cse0 4) 50) (= 100 (select .cse0 3)) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select |#valid| 1) 1) .cse1 (= (select |#valid| 0) 0) (not (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (select .cse0 5) 46) (= (select |#valid| 2) 1) .cse2 (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse3 0) 48) (= (+ (* |ULTIMATE.start_main_~B~0#1| (div |ULTIMATE.start_main_~p~0#1| 2)) (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) (+ (div |ULTIMATE.start_main_~d~0#1| 2) |ULTIMATE.start_main_~A~0#1|)) .cse4 (= (select .cse3 1) 0) (= (select .cse0 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (let ((.cse5 (* |ULTIMATE.start_main_~B~0#1| (div (- (div (- |ULTIMATE.start_main_~p~0#1|) (- 2))) (- 2))))) (and (<= 4 |ULTIMATE.start_main_~p~0#1|) (<= (* 2 .cse5) |ULTIMATE.start_main_~r~0#1|) .cse6 (= (* .cse5 4) |ULTIMATE.start_main_~d~0#1|) .cse1 .cse2)) (and .cse6 .cse1 (<= 1 |ULTIMATE.start_main_~r~0#1|) .cse2 .cse4 (= 2 |ULTIMATE.start_main_~d~0#1|)))) [2022-12-14 11:36:45,479 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2022-12-14 11:36:45,479 INFO L899 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2022-12-14 11:36:45,479 INFO L899 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2022-12-14 11:36:45,479 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2022-12-14 11:36:45,479 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 14 20) the Hoare annotation is: true [2022-12-14 11:36:45,480 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2022-12-14 11:36:45,482 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 11:36:45,483 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 11:36:45,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 11:36:45 BoogieIcfgContainer [2022-12-14 11:36:45,495 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 11:36:45,496 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 11:36:45,496 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 11:36:45,496 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 11:36:45,496 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:26:20" (3/4) ... [2022-12-14 11:36:45,498 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-14 11:36:45,502 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-12-14 11:36:45,504 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2022-12-14 11:36:45,504 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2022-12-14 11:36:45,504 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-12-14 11:36:45,504 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-14 11:36:45,504 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-14 11:36:45,521 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((((((((((((((((((((((unknown-#memory_int-unknown[2][7] == 0 && unknown-#length-unknown[3] == 12) && 114 == unknown-#memory_int-unknown[2][2]) && (if A <= 100 && 0 <= A then 1 else 0) == \old(cond)) && unknown-#memory_int-unknown[2][6] == 99) && 97 == unknown-#memory_int-unknown[2][1]) && 2 == unknown-#length-unknown[1]) && B == d) && \valid[3] == 1) && unknown-#memory_int-unknown[2][4] == 50) && 100 == unknown-#memory_int-unknown[2][3]) && \old(cond) == cond) && \valid[1] == 1) && A == r) && \valid[0] == 0) && !(cond == 0)) && unknown-#memory_int-unknown[2][5] == 46) && \valid[2] == 1) && d == p) && #NULL == 0) && 8 == unknown-#length-unknown[2]) && unknown-#memory_int-unknown[1][0] == 48) && B * (p / 2) + B * q + r == d / 2 + A) && B == 1) && unknown-#memory_int-unknown[1][1] == 0) && unknown-#memory_int-unknown[2][0] == 104) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) || (((((4 <= p && 2 * (B * (-(-p / -2) / -2)) <= r) && q == 0) && B * (-(-p / -2) / -2) * 4 == d) && A == r) && d == p)) || (((((q == 0 && A == r) && 1 <= r) && d == p) && B == 1) && 2 == d) [2022-12-14 11:36:45,526 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 11:36:45,526 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 11:36:45,527 INFO L158 Benchmark]: Toolchain (without parser) took 625619.53ms. Allocated memory was 146.8MB in the beginning and 255.9MB in the end (delta: 109.1MB). Free memory was 112.9MB in the beginning and 191.4MB in the end (delta: -78.5MB). Peak memory consumption was 31.6MB. Max. memory is 16.1GB. [2022-12-14 11:36:45,527 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 102.8MB. Free memory is still 79.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 11:36:45,527 INFO L158 Benchmark]: CACSL2BoogieTranslator took 174.04ms. Allocated memory is still 146.8MB. Free memory was 112.9MB in the beginning and 102.6MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 11:36:45,527 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.20ms. Allocated memory is still 146.8MB. Free memory was 102.2MB in the beginning and 100.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 11:36:45,527 INFO L158 Benchmark]: Boogie Preprocessor took 19.05ms. Allocated memory is still 146.8MB. Free memory was 100.9MB in the beginning and 99.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 11:36:45,527 INFO L158 Benchmark]: RCFGBuilder took 256.87ms. Allocated memory is still 146.8MB. Free memory was 99.6MB in the beginning and 86.3MB in the end (delta: 13.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-14 11:36:45,528 INFO L158 Benchmark]: TraceAbstraction took 625109.16ms. Allocated memory was 146.8MB in the beginning and 255.9MB in the end (delta: 109.1MB). Free memory was 85.8MB in the beginning and 194.6MB in the end (delta: -108.7MB). Peak memory consumption was 126.8MB. Max. memory is 16.1GB. [2022-12-14 11:36:45,528 INFO L158 Benchmark]: Witness Printer took 30.90ms. Allocated memory is still 255.9MB. Free memory was 194.6MB in the beginning and 191.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 11:36:45,529 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 102.8MB. Free memory is still 79.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 174.04ms. Allocated memory is still 146.8MB. Free memory was 112.9MB in the beginning and 102.6MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.20ms. Allocated memory is still 146.8MB. Free memory was 102.2MB in the beginning and 100.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.05ms. Allocated memory is still 146.8MB. Free memory was 100.9MB in the beginning and 99.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 256.87ms. Allocated memory is still 146.8MB. Free memory was 99.6MB in the beginning and 86.3MB in the end (delta: 13.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 625109.16ms. Allocated memory was 146.8MB in the beginning and 255.9MB in the end (delta: 109.1MB). Free memory was 85.8MB in the beginning and 194.6MB in the end (delta: -108.7MB). Peak memory consumption was 126.8MB. Max. memory is 16.1GB. * Witness Printer took 30.90ms. Allocated memory is still 255.9MB. Free memory was 194.6MB in the beginning and 191.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 625.1s, OverallIterations: 11, TraceHistogramMax: 16, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 324.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 32.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10 mSolverCounterUnknown, 273 SdHoareTripleChecker+Valid, 63.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 221 mSDsluCounter, 755 SdHoareTripleChecker+Invalid, 63.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 70 IncrementalHoareTripleChecker+Unchecked, 520 mSDsCounter, 352 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2462 IncrementalHoareTripleChecker+Invalid, 2894 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 352 mSolverCounterUnsat, 235 mSDtfsCounter, 2462 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1459 GetRequests, 1189 SyntacticMatches, 40 SemanticMatches, 230 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2479 ImplicationChecksByTransitivity, 351.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=118occurred in iteration=10, InterpolantAutomatonStates: 111, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 41 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 66 PreInvPairs, 122 NumberOfFragments, 958 HoareAnnotationTreeSize, 66 FomulaSimplifications, 2184 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 11 FomulaSimplificationsInter, 19752 FormulaSimplificationTreeSizeReductionInter, 31.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 239.2s InterpolantComputationTime, 541 NumberOfCodeBlocks, 464 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 973 ConstructedInterpolants, 6 QuantifiedInterpolants, 13246 SizeOfPredicates, 39 NumberOfNonLiveVariables, 1307 ConjunctsInSsa, 245 ConjunctsInUnsatCore, 19 InterpolantComputations, 3 PerfectInterpolantSequences, 3149/3559 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.3s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 11, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 9, TOOLS_POST_TIME: 0.0s, TOOLS_POST_CALL_APPLICATIONS: 7, TOOLS_POST_CALL_TIME: 0.1s, TOOLS_POST_RETURN_APPLICATIONS: 4, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 20, TOOLS_QUANTIFIERELIM_TIME: 0.2s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 29, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 8, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 11, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 4, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 69, DAG_COMPRESSION_RETAINED_NODES: 33, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: ((1 <= p && A == q + r) && d == p) && B == 1 - InvariantResult [Line: 59]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((unknown-#memory_int-unknown[2][7] == 0 && unknown-#length-unknown[3] == 12) && 114 == unknown-#memory_int-unknown[2][2]) && (if A <= 100 && 0 <= A then 1 else 0) == \old(cond)) && unknown-#memory_int-unknown[2][6] == 99) && 97 == unknown-#memory_int-unknown[2][1]) && 2 == unknown-#length-unknown[1]) && B == d) && \valid[3] == 1) && unknown-#memory_int-unknown[2][4] == 50) && 100 == unknown-#memory_int-unknown[2][3]) && \old(cond) == cond) && \valid[1] == 1) && A == r) && \valid[0] == 0) && !(cond == 0)) && unknown-#memory_int-unknown[2][5] == 46) && \valid[2] == 1) && d == p) && #NULL == 0) && 8 == unknown-#length-unknown[2]) && unknown-#memory_int-unknown[1][0] == 48) && B * (p / 2) + B * q + r == d / 2 + A) && B == 1) && unknown-#memory_int-unknown[1][1] == 0) && unknown-#memory_int-unknown[2][0] == 104) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) || (((((4 <= p && 2 * (B * (-(-p / -2) / -2)) <= r) && q == 0) && B * (-(-p / -2) / -2) * 4 == d) && A == r) && d == p)) || (((((q == 0 && A == r) && 1 <= r) && d == p) && B == 1) && 2 == d) RESULT: Ultimate proved your program to be correct! [2022-12-14 11:36:45,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60018864-8ae4-419d-b004-0c63cc10cb5b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE